#  Open File Report 03-247

#  

# 

# MAP LEGEND

# 

# Qa -- Alluvium

> Series: Quaternary
>
> Maximum Age: Holocene
>
> Minimum Age: Holocene
>
> Lithology:
>
> Major: Alluvium
>
> Minor :
>
> Incidental:

# CIMARRON- Clay, silt, sand, and gravel 0 to 100 feet thick.

# TEXAS- Sand, silt, clay, and gravel located in valleys of principal streams. Thickness not known but may exceed 100 feet in North Canadian River valley and may be 50 to 100 feet in lower parts of valleys of Coldwater and Palo Duro Creeks. 

# 

# BEAVER - Sand, gravel, silt, and clay in discontinuous lenses along courses of larger streams. 0-50 feet thick

# Qal- Alluvium

> Series: Quaternary
>
> Maximum Age: Holocene
>
> Minimum Age: Holocene
>
> Lithology:
>
> Major: Alluvium
>
> Minor :
>
> Incidental:

## WOODWARD- Lenticular and interfingering deposits of gravel, sand, silt, and clay. Generally light-tan to gray. Thickness along major streams ranges up to 100 feet and probably averages 40 feet; along minor streams the thickness ranges up to 45 feet and probably averages 20 feet

> **ENID**- Sand, silt, clay, and locally gravel. Maximum thickness
> ranges from 30 to 80 feet (9 to 24 m) along major streams and from 0
> to 60 feet (0 to 18 m) along minor streams.
>
> **TULSA-** Gravel, sand, silt, and clay.
>
> **CLINTON-** Stream-laid deposits of sand, silt, clay, and gravel;
> thickness
>
> ranges from 0 to about 170 feet.
>
> **OKLAHOMA CITY**- Sand, silt, clay, and lenticular beds of gravel.
> Thickness ranges from about 30 to 100 feet and probably averages about
> 50 feet along major streams. Along minor streams, thickness ranges
> from a few feet to about 50 feet and probably averages about 25 feet.
>
> **LAWTON-** Sand, clay, and gravel as much as 50 feet (15 m) thick;
>
> Shown only along major streams and tributaries.
>
> **ARDMORE-SHERMAN-** Gravel, sand, silt, and clay, including low
> terraces;
>
> thickness, about 25 to 100 feet.
>
> **McALESTER TEXARKANA**- Gravel, sand, silt, and clay, including low
> terraces about 30 feet above channels; thickness, about 50 feet along
> Little River and 110 feet along Red River.

## Qd- Dune Sand

> Series: Quaternary
>
> Maximum Age: Pleistocene
>
> Minimum Age: Pleistocene
>
> Lithology:
>
> Major: Dune Sand
>
> Minor :
>
> Incidental:
>
> **CIMARRON**- Fine- to medium-grained sand 0 to 40 feet thick.
>
> **TEXAS-** Fine to coarse windblown sand. Maximum thickness
>
> about 30 feet.
>
> **BEAVER-** Fine to coarse, round to sub-round, windblown sand
> consisting mostly of quartz grains. 0-50 feet thick

## Qds- Dune Sand

> Series: Quaternary
>
> Maximum Age: Pleistocene
>
> Minimum Age: Pleistocene
>
> Lithology:
>
> Major: Dune Sand
>
> Minor :
>
> Incidental:

## CLINTON- Wind-blown sand; thickness ranges from a thin Veneer to about 70 feet.

> **LAWTON-** Wind-laid sand; maximum thickness about 50 feet (15 m).

## Qt- Terrace Deposits

> Series: Quaternary
>
> Maximum Age: Pleistocene
>
> Minimum Age: Pleistocene
>
> Lithology:
>
> Major: Gravel, sand, silt, and clay
>
> Minor : volcanic ash
>
> Incidental:
>
> **WOODWARD**- Lenticular and interfingering deposits of light-tan to
> gray gravel, sand, silt, clay, and volcanic ash. Sand dunes are common
> in many places. Thickness ranges up to 150 feet and averages about 60
> feet.
>
> **ENID-** Sand, silt, clay, and gravel. Maximum thickness, about 75
> feet (23 m) along major streams
>
> **TULSA**- Fine gravel, sand, silt, and clay
>
> **CLINTON-** Stream-laid deposits of sand, silt, clay, gravel, and
> volcanic ash; thickness ranges from 0 to about 120 feet.
>
> **OKLAHOMA CITY-** Lenticular beds of sand, silt, clay, and gravel.
> Thickness ranges from a few feet to about 100 feet and probably
> averages about 50 feet along major streams
>
> **FORT SMITH-** Gravel, sand, silt, and clay
>
> **LAWTON-** Sand, clay, and gravel as much as 75 feet (23 m) in
> Tillman County, ranging from 5 to 50 feet (2 to 15 m) elsewhere.
>
> **ARDMORE-SHERMAN-** Gravel, sand, silt, clay, and volcanic ash;
> thickness, about 5 to 50 feet; at various levels, as high as 160 feet
> above
>
> present flood plains.
>
> **McALESTER TEXARKANA-** Gravel, sand, silt, clay, and volcanic ash;
> several levels 20 to 160 feet or more above present flood plains, with
> each level containing deposits that average 20 to 30 feet in
> thickness, some windblown sand on top; may include colluvial wash down
> sides of hills

## Tb- Basalt

> Series: Tertiary
>
> Maximum Age: Pliocene
>
> Minimum Age: Pliocene
>
> Lithology:
>
> Major: Basalt
>
> Minor :
>
> Incidental:
>
> **CIMARRON-** Dark, dense to vesicular volcanic rock 50 to 85 +/- feet
> thick forming cap rock of Black Mesa.
>
> **Comments:** Raton Basalt: Is oldest (of three) basaltic to
> latiandesitic effusive rock unit mapped in western part of
> Raton-Clayton volcanic field, Colfax Co, NM in Las Vegas-Raton basin.
> Caps highest and longest mesas in area. Includes many sheets of lava;
> vents are generally no longer marked by cinder cones. Analyzed
> specimens are olivine basalts, alkali basalts, a few trachy-basalts,
> and latibasalts. Rocks are medium to dark gray or black, very hard,
> and in part vesicular; some have silvery sheen on fresh break, aptly
> owing to fine diktytaxitic texture; are visibly porphyritic (typically
> olivine is the only phenocryst), but some flows have phenocrysts or
> xeno-crysts of other minerals; altered olivine phenocrysts appear as
> red or brown specks. Petrography and petrochemistry described. K-Ar
> ages range from 3.5 to 4.0 m.y. Age is Pliocene. (Scott ,1991)

## To- Ogallala Formation

> Series: Tertiary
>
> Maximum Age: Pliocene
>
> Minimum Age: Pliocene
>
> Lithology:
>
> Major: sand, siltstone, clay, gravel and limestone
>
> Minor : volcanic ash, caliche
>
> Incidental:
>
> **CIMARRON-** Generally semiconsolidated clay, silt, sand, gravel, and
> caliche 0 to 400 feet thick.
>
> **BEAVER-** Interbedded sand, siltstone, clay, gravel lenses, and thin
> limestone. Caliche common near surface but occurrence is not limited
> to the surface. Caliche accounts for most of the white color in the
> Ogallala. Other colors generally light tan or buff but locally may be
> pastel shades of almost any color. The Laverne and Rexroad Formations
> of Pliocene age and the Meade Group and Odee (of local usage) and
> other formations of Pleistocene age occur locally and are included
> with the Ogallala Formation, 0-700 feet thick.
>
> **WOODWARD-** Gravel, sand, silt, clay, caliche, and limestone,
> locally cemented with calcium carbonate. Generally light-tan to gray
> to white. Thickness ranges up to 400 feet and probably averages 150
> feet.
>
> **CLINTON-** Gray to light-brown, fine- to medium-grained sand with
> some, clay, silt, gravel, volcanic ash, and caliche beds; locally
> cemented by calcium carbonate. Thickness ranges from 0 to about 320
> feet. The formation thins eastward.
>
> **Toa- Pleistocene and Pliocene deposits, undifferentiated**
>
> Series: Quaternary- Tertiary
>
> Maximum Age: Pliocene
>
> Minimum Age: Pleistocene
>
> Lithology:
>
> Major: sand, silt, clay, gravel, sandstone, caliche, limestone,
> conglomerate, and volcanic ash
>
> Minor :
>
> Incidental:
>
> **TEXAS-** Interfingering beds, tongues, and lenses of sand, silt,
> clay, gravel, sandstone, caliche, limestone, conglomerate, and
> volcanic ash. Includes Ogallala and Laverne Formations of Pliocene age
> and younger deposits of Pleistocene age. Locally the units are tightly
> cemented by calcium carbonate; other places, they are very poorly
> consolidated and nearly free of cementing materials. Thickness ranges
> from 0 to about 800 feet.

**Ko- Ozan Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: marl, clay, sand, and limestone
>
> Minor :
>
> Incidental:
>
> **McALESTER TEXARKANA-** Marl and clay, light- to dark- to
> brownish-gray, micaceous, calcareous, sandy, fine-grained sand, with
> interbedded chalky limestone; glauconitic marl and sand at base; same
> as lower Taylor Marl of Texas; thickness, about 100 feet.
>
> **Comments**: marl refers to loosely consolidated calcareous clays,
> silts and sands containing glauconite.

**Kbr- Brownstown Marl**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: marl, clay, and sand
>
> Minor : limestone
>
> Incidental:
>
> **McALESTER TEXARKANA-** Marl and clay, gray, calcareous, micaceous,
> sandy and fine-grained sand, with some interbedded chalky limestones;
> same as upper Austin Chalk of Texas; thickness, about 100 feet.
>
> **Comments**: marl refers to loosely consolidated calcareous clays,
> silts and sands containing glauconite

**Kef- Eagle Ford Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: shale
>
> Minor :
>
> Incidental: sandstone, limestone
>
> **ARDMORE-SHERMAN-** Shale, dark-gray, plastic; thickness, about 50
> feet; top eroded.
>
> **Comments**: medium to dark gray shale, bituminous, selenitic,
> calcareous concretions and septaria, a few thin platy beds of
> sandstone and sandy limestone; marine megafossils.

## Kto- Tokio Formation

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: sand
>
> Minor : shale
>
> Incidental:
>
> **McALESTER TEXARKANA-** Sand, light-gray, fine- to coarse-grained,
> quartzose, poorly sorted, crossbedded, and gray clay shale, with many
> cylindrical pipe structures, petrified wood and invertebrates; same as
> Bonham Marl and Austin Chalk of Texas; thickness ranges from 88 to 380
> feet, increasing eastward; reaches thickness of 595 feet in subsurface
> southeastward.

**Kw- Woodbine Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: sand, clay
>
> Minor : gravel
>
> Incidental: coal
>
> **McALESTER TEXARKANA-** Sand, dark-green, yellowish-red, white, gray,
> fine- to coarse-grained, tuffaceous in upper part; crossbedded,
> quartzose, and brownish-red noncalcareous clay; some gravel lentils
> with little to no quartz and some lignites and fossil plants; rests
> unconformably upon successively older Cretaceous units eastward;
> thickness, 325 to 455 feet, increasing eastward.
>
> **Comments**: interlensing sequence of nonmarine, brackish, and marine
> beds, includes marine fossils

**Kwt- Templeton Member of Woodbine Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor :
>
> Incidental:
>
> **ARDMORE-SHERMAN-** indurated sandstone and shale, about
>
> 75 feet thick, erodes to an escarpment; (Woodbine Formation)

**Kwl- Lewisville Member of Woodbine Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor :
>
> Incidental:
>
> **ARDMORE-SHERMAN-** mostly shale and weakly indurated sandstone,
> about 75 feet thick.

**Kwr- Red Branch Member of Woodbine Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor :
>
> Incidental: coal
>
> **ARDMORE-SHERMAN**- indurated sandstone, shale, and lignite, about 75
> feet thick, erodes to an escarpment; and basal Dexter Member.

**Kwd- Dexter Member of Woodbine Formation**

> Series: Cretaceous
>
> Maximum Age: Late Cretaceous
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor :
>
> Incidental: coal
>
> **ARDMORE-SHERMAN**- sandstone, shale, and lignite, moderately to
> weakly indurated, about 100 feet thick.
>
> **Kgb- Grayson Marl and Bennington Limestone**
>
> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: marl
>
> Minor : limestone
>
> Incidental:
>
> **ARDMORE-SHERMAN**- \"Grayson Marl,\" marl, olive-gray, weakly
> indurated; thickness, about 25 feet. \"Bennington Limestone\" at base
> is moderately indurated, medium bedded; thickness, about 10 feet.
>
> **McALESTER TEXARKANA-** \"Grayson Marl,\" olive-gray, weakly
> indurated; with Texigryphaea roemeri;\" thickness, about 25 feet.
> \"Bennington Limestone\" at base, limestone, gray to gray-brown,
> sandy, fossiliferous, overlapped eastward by Woodbine; thickness, 6 to
> 18 feet.
>
> **Comments**: marl refers to loosely consolidated calcareous clays,
> silts and sands containing glauconite

**Kb- Bokchito Formation**

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: clay and shale
>
> Minor : sandstone, limestone
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Clay, illitic, kaolinitic, with some tan
> limestones and
>
> sandstones. Subdivided into \"Pawpaw Clay\" at top, 40 to 60 feet
> thick; \"Quarry Limestone,\" 13 feet thick; \"Weno Clay,\" 100 to 135
> feet thick; and basal \"Denton Clay,\" 50 to 70 feet thick.
>
> **Comments**: Lowermost 90 ft is sandy clay shale with some
> ferruginous limestone segregations and ironstone nodules; above these
> are 20-30 ft of friable sandstone followed by bluish shell limestones
> separated by friable shales. Limestone is hard, semicrystalline, and
> on weathering turns yellowish brown or reddish. At top of formation
> are 50 ft of sandy and clay shales and, locally, friable sandstone
> strata; shows cross- bedding in places. Total thickness of formation
> is 140 ft. Ouachita Mountain uplift; S. OK folded belt province.

## Kpm- Pawpaw Sandstone and McNutt Limestone

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: sandstone
>
> Minor: limestone
>
> Incidental:
>
> **McALESTER TEXARKANA-** \"Pawpaw Sandstone,\" sandstone, yellowish-
> to reddish-gray, fine-grained, with gray to reddish-purple sandy clay;
> thickness, 35 feet. \"McNutt Limestone\" at base, limestone,
> grayish-brown, arenaceous, with \"Rastellum quadriplicatum;\"
> thickness, 2 to 3 feet.

## Kws- Weno Clay and Soper Limestone

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: clay and shale, gypsum, sandstone
>
> Minor: limestone
>
> Incidental:

## McALESTER TEXARKANA- \"Weno Clay\", clay and shale, brownish-gray, with selenite gypsum; interbedded with red- to yellow-brown fine-grained sandstones; thickness, 30 to 53 feet. \"Soper Limestone\" at base, limestone, gray-brown to red-brown, compact, fossiliferous, with \"Rastellum carinatum;\" thickness, 1 to 2 feet.

> **Kdc- Denton Cla**y
>
> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: clay and shale, limestone
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA**- Clay and shale, blue- to brownish-gray, and
> marly, fossiliferous limestone with \"Texigryphaea washitaensis;\"
> thickness, 45 to 65 feet.

## Kcf- Caddo Formation

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: limestone and shale, marl
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-**Limestones, marls, and shales; 150 feet thick.
> Subdivided into \"Fort Worth Limestone\" at top and \"Duck Creek
> Limestone\" below.
>
> **McALESTER TEXARKANA-** Limestones, white to cream, silty,
> alternating with gray shales, with \"Texigryphaea washitaensis;\"
> 7-foot bed at top (Fort Worth equivalent) and blue-gray silty shales
> and limestones below with \"Texigryphaea navia\" (Duck Creek
> equivalent); thickness, 150 feet. Ouachita Mountain uplift; S. OK
> folded belt province

## Kki- Kiamichi Formation

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: shale
>
> Minor: limestone
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale, dark-gray, plastic, with oyster-shell
> limestones; thickness, about 30 feet.
>
> **McALESTER TEXARKANA-** Shale, dark-gray to black, with some brown
> fossiliferous limestones, with \"Texigryphaea navia;\" thickness, 28
> to 36 feet, and up to 80 feet in subsurface of southern McCurtain
> County.Ouachita Mountain uplift; S. OK folded belt province

## Kgw- Goodland Limestone and Walnut Clay

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: limestone
>
> Minor: clay
>
> Incidental:
>
> **ARDMORE-SHERMAN-** \"Goodland Limestone,\" limestone, gray, dense,
> nodular to massive; thickness, 20 to 30 feet. At base is \"Walnut
> Clay,\" tan clay, about 4 feet thick.
>
> **McALESTER TEXARKANA-** Limestone, white, fine crystalline,
> massive-bedded, with \"Texigryphaea mucronata;\" some argillaceous
> buff beds in lower few feet may be \"Walnut Clay\" equivalents; erodes
> into a mappable escarpment; thickness, 26 to 55 feet.

## Ka- Antlers Sand or Antlers Sandstone

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: sandstone and sand
>
> Minor: clay, conglomerate
>
> Incidental:
>
> **ARDMORE-SHERMAN-** \"Antlers Sand\" Sand, white to yellow,
> medium-grained, weakly indurated, with varicolored clays. Contains
> arkosic conglomerates near Arbuckle Mountains and \"Baum Limestone\"
> near Mannsville anticline. Thickness, 200 to 700 feet.
>
> **McALESTER TEXARKANA-** \"Antlers Sandstone\" Sandstone and sand,
> white to reddish-yellow to orange-brown to gray, fine- to
> coarse-grained, quartzose, crossbedded, moderately to weakly
> indurated, interbedded with varicolored clays and conglomerates;
> contains fossil wood and dinosaurs; rests unconformably upon Ouachita
> rocks but conformably upon DeQueen Limestone; thickness, 0 to 320
> feet, thickening southeastward to 900 feet in subsurface.

**Kdq- DeQueen Limestone**

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: Limestone and marl, shale, gypsum, anhydrite
>
> Minor: conglomerate
>
> Incidental:
>
> McALESTER TEXARKANA- Limestone and marl, blue- to pinkish- to
> yellowish-gray, locally siliceous, interbedded with varicolored
> calcareous shales; basal limestone conglomerate in places where
> unconformable upon Ouachita rocks but absent where conformable on
> Holly Creek Formation; contains 80 feet of gypsum and anhydrite in
> subsurface; thickness, 38 feet, lensing out to 1 foot westward but
> thickening to 190 feet southeastward in subsurface.

## Kh- Holly Creek Formation

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: gravel
>
> Minor: clay, silt
>
> Incidental:
>
> **McALESTER TEXARKANA-** Gravel, composed mostly of quartz and
> novaculite, with clay and silt, tan to red-brown; unconformable on
> Ouachita rocks; thickness, 30 to 100 feet, thickening to 1,070 feet in
> subsurface of southern McCurtain County

## Kc- Colorado Group

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: limestone, shale
>
> Minor:
>
> Incidental:
>
> **CIMARRON-** includes: Greenhorn Limestone: Gray fossiliferous
> limestone and calcareous shale. Graneros Shale: Dark-gray shale.

## Kd- Dakota Group

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: sandstone, conglomerate
>
> Minor:
>
> Incidental:
>
> **CLINTON-** Outliers of the \"Kiowa Formation,\" Kk, dark-gray shale
> with some thin beds of fossiliferous tan limestone, range in thickness
> from a few feet to about 20 feet. Associated in some places is a 5- to
> 10-foot, gray to brown, coarse-grained sandstone and conglomerate
> assigned to the overlying \"Dakota Group,\" Kd, (lower sandstone
> part).

## Kds- Dakota Sandstone

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor:
>
> Incidental:
>
> **CIMARRON-** Buff to light-brown, fine- to medium-grained, thin
> bedded to massive sandstone with interbedded shales.

## Kk- Kiowa Formation

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: shale, limestone
>
> Minor: sandstone
>
> Incidental:
>
> **WOODWARD-** Gray and yellow shale and limestone, with many
> \"Texigryphaea\" shells locally. At base is 5 to 10 feet of
> greenish-gray sandstone in places. Thickness ranges up to 140 feet
> with top eroded.
>
> **CLINTON-** Outliers of the \"Kiowa Formation,\" Kk, dark-gray shale
> with some thin beds of fossiliferous tan limestone, range in thickness
> from a few feet to about 20 feet. Associated in some places is a 5- to
> 10-foot, gray to brown, coarse-grained sandstone and conglomerate
> assigned to the overlying \"Dakota Group,\" Kd, (lower sandstone
> part).

## Kp- Purgatoire Formation

> Series: Cretaceous
>
> Maximum Age: Early Cretaceous
>
> Minimum Age: Early Cretaceous
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor: conglomerate
>
> Incidental:
>
> **CIMARRON-** Kiowa Shale Member: Gray to black fossiliferous shale
> with sandstone in the upper part. Thickness ranges from 0 to 50 +/-
> feet. Cheyenne Sandstone Member: Massive, white to buff, fine- to
> medium-grained sandstone, containing some conglomerate in the lower
> part, from 0 to 120 +/- feet thick.

## Je- Exeter (Entrada) Sandstone

> Series: Jurassic
>
> Maximum Age: Late Jurassic
>
> Minimum Age: Late Jurassic
>
> Lithology:
>
> Major: sandstone
>
> Minor:
>
> Incidental:

# CIMARRON- Massive, white to buff, fine- to medium-grained sandstone 0 to 50 +/- feet thick.

## Jm- Morrison Formation

> Series: Jurassic
>
> Maximum Age: Late Jurassic
>
> Minimum Age: Late Jurassic
>
> Lithology:
>
> Major: sandstone, limestone, dolomite, shale, and conglomerate
>
> Minor:
>
> Incidental:
>
> **CIMARRON-** Varicolored fine-grained sandstone, limestone, dolomite,
> shale, and conglomerate 0 to 470 +/- feet thick.

## \^d- Dockum Group

> Series: Triassic
>
> Maximum Age: Late Triassic
>
> Minimum Age: Late Triassic
>
> Lithology:
>
> Major: siltstone, sandstone, conglomerate, limestone
>
> Minor: clay, shale
>
> Incidental:
>
> **CIMARRON-** Upper shale unit: Varicolored siltstone or claystone,
> conglomerate, fine-grained sandstone, and limestone. Lower sandstone
> unit: Varicolored, fine- to coarse-grained sandstone with some clay
> and interbedded shale.

## }u- Mesozoic rocks undifferentiated

> Series: Cretaceous + Jurassic + Triassic
>
> Maximum Age: Early Triassic
>
> Minimum Age: Late Cretaceous
>
> Lithology:
>
> Major: shale
>
> Minor: clay, sandstone
>
> Incidental:
>
> **TEXAS-** Red shale containing thin layers of yellow and gray clay
> and indistinctly bedded fine-grained buff, red, white, and gray
> sandstone. May include beds of Cretaceous, Jurassic, and Triassic
> ages. Their exposed thickness is less than 100 feet.

## Pec- Elk City Sandstone

> Series: Permian
>
> Maximum Age: Late Permian
>
> Minimum Age: Late Permian
>
> Lithology:
>
> Major: sandstone
>
> Minor: silt, clay
>
> Incidental:
>
> **CLINTON-** Reddish-brown, fine-grained sandstone with minor amounts
> of silt and clay, weakly cemented by iron oxide, calcium carbonate,
> and gypsum; maximum thickness 185 feet, top eroded.

## Pdy- Doxey Formation or Doxey Shale

> Series: Permian
>
> Maximum Age: Late Permian
>
> Minimum Age: Late Permian
>
> Lithology:
>
> Major: shale and siltstone
>
> Minor:
>
> Incidental:
>
> **WOODWARD-** "Doxey Formation"- Red brown shale and siltstone, with
> greenish-gray calcareous siltstone at base. Exposed thickness is 30
> feet, with top eroded.
>
> **CLINTON-** "Doxey Shale"- Reddish-brown, silty shale and siltstone;
> thickness, about 190 feet.
>
> **Pcc- Cloud Chief Formation**
>
> Series: Permian
>
> Maximum Age: Late Permian
>
> Minimum Age: Late Permian
>
> Lithology:
>
> Major: shale, siltstone, sandstone
>
> Minor: dolomite, gypsum
>
> Incidental:
>
> **WOODWARD-** Red-brown and greenish-gray shale and siltstone with
> some orange-brown fine-grained sandstone and siltstone. At base are
> two or more thin, pink to maroon to greenish-gray dolomite beds and
> (or) gypsum beds (\"Moccasin Creek Bed\") eroding into a mappable
> escarpment. About 25 feet above the base is a white to light-gray
> dolomite (\"Day Creek Bed\") not mapped. Thickness ranges up to 160
> feet, with top eroded in many places.
>
> **CLINTON-** Reddish-brown to orange-brown shale, interbedded with
> siltstone and sandstone in the middle part and some dolomite and much
> gypsum in lower part; thickness about 400 feet, thinning northward to
> about 175 feet. The \"Moccasin Creek Gypsum Member\" is at the base.
>
> **LAWTON-** Represented in this area by the \"Moccasin Creek Gypsum
> Member,\" which is about 30 feet (9 m) thick.
>
> **Comments**: Named for town of Cloud Chief in eastern Washita Co, OK
> in Anadarko basin, near which unit is \"typically exposed\" (Gould,
> 1924) Consists of ledges of massive gypsums imbedded in red shales.
> The gypsums vary a lot, both in number and thickness. Maximum
> development of the gypsums is along axis of Anadarko basin in eastern
> Washita Co, where 100-ft beds occur.

## Pwh- Whitehorse Group

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone, siltstone
>
> Minor: dolomite, gypsum
>
> Incidental: shale
>
> **CLINTON-** Predominantly orange-brown, fine-grained sandstone, the
> \"Whitehorse Group\" is mapped as Pwh where separate formations have
> not been distinguished and as the \"Rush Springs Formation\" and the
> \"Marlow Formation\" where identified. \"Rush Springs Formation,\" Pr,
> orange-brown, cross-bedded, fine-grained sandstone with some dolomite
> and gypsum beds. Thickness, about 300 feet, thinning northward to
> about 186 feet. The \"Weatherford Gypsum Bed,\" Prw, is about 30 to 60
> feet below the top (mapped in southeastern part only). \"Marlow
> Formation,\" Pm, orange-brown, fine-grained sandstone and siltstone,
> about 100 to 130 feet thick, thinning northward. This formation has 2
> gypsum and (or) dolomite beds in upper 20 feet\--the \"Emanuel Bed\"
> (at top) and the \"Relay Creek Bed\" (20 feet below top). Two thin,
> pale shales occur; the first is 1 foot below the top (\"Gracemont\")
> and the second is 55 feet above the base (unnamed). The \"Verden
> Sandstone Lentil,\" Pmv, is a coarse-grained, calcareous,
> fossiliferous sandstone (2 to 10 feet thick) that occurs in the middle
> of the Marlow, about 25 feet below the Relay Creek Bed and 85 to 95
> feet above the base.
>
> **LAWTON-** Predominantly orange-brown, fine-grained sandstone, the
> \"Whitehorse Group\" is mapped as Pwh where separate formations have
> not been distinguished and as the \"Rush Springs Formation\" and the
> \"Marlow Formation\" where identified. \"Whitehorse Group
> undifferentiated,\" Pwh, fine-grained sandstone and siltstone as much
> as 100 feet (30 m) thick in western part of quadrangle, interbedded
> with gypsum beds 3 to 10 feet (1 to 3 m) thick.
>
> **Comments:** Named for Whitehorse Springs, Woods Co, OK, Anadarko
> basin. (Gould,1905) Weathers to form conspicuous buttes and mesas.
> Outcrops over a large area. Occupies a continuous exposure across the
> axis of the basin. From Fort Cobb and Anadarko (Caddo Co) southeast to
> head of Anadarko basin, Whitehorse averages 15 mi in width. From these
> towns northward 50 mi width averages 25 mi. S.Oklahoma folded belt
> province
>
> **Pr- Rush Springs Formation**
>
> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone
>
> Minor: gypsum, dolomite
>
> Incidental: shale
>
> **WOODWARD-** Orange-brown fine-grained sandstone, commonly
> crossbedded, with some interbedded red-brown shale, silty shale, and
> gypsum beds. In southern part of area, about 30 feet below top is a
> thin massive gypsum bed (\"Weatherford Bed\" or \"One Horse Bed\"),
> not mapped here. About 100 feet lower is another thin gypsum bed
> (\"Old Crow Bed\") not mapped here. Thickness is about 190 feet in
> southern part and 90 feet near Kansas border, with top eroded in many
> places.
>
> **CLINTON-** \"Rush Springs Formation,\" Pr, orange-brown,
> cross-bedded, fine-grained sandstone with some dolomite and gypsum
> beds. Thickness, about 300 feet, thinning northward to about 186 feet.
>
> **LAWTON-** \"Rush Springs Formation,\" Pr, very fine-grained,
> cross-bedded sandstone, 136 to 300 feet (41 to 90 m) thick. The
> \"Weatherford Gypsum Bed,\" Prw, contains gypsum and dolomite and is
> as much as 60 feet (18 m) thick in the upper part of the Rush Springs.
> (Whitehorse Group)
>
> **ARDMORE-SHERMAN-** Sandstone, orange-brown, fine- to medium-grained,
> moderately indurated, with \"Weatherford Gypsum Bed,\" Prw, 2 to 15
> feet thick, near top. Thickness, about 280 feet, top eroded
> (Whitehorse Group)

## Prw- Weatherford Gypsum Bed of Rush Springs Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: gypsum, dolomite
>
> Minor:
>
> Incidental:
>
> **CLINTON-** The \"Weatherford Gypsum Bed,\" Prw, dolomite and gypsum
> beds, is about 30 to 60 feet below the top (mapped in southeastern
> part only).
>
> **LAWTON-** \"Weatherford Gypsum Bed,\" Prw, contains gypsum and
> dolomite and is as much as 60 feet (18 m) thick in the upper part of
> the Rush Springs. (Whitehorse Group)
>
> **ARDMORE-SHERMAN-** \"Weatherford Gypsum Bed,\" Prw, 2 to 15 feet
> thick, near top of Rush Springs Formation

## Pm- Marlow Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: sandstone, siltstone
>
> Minor: shale
>
> Incidental: gypsum, dolomite
>
> **WOODWARD-** Orange-brown fine-grained sandstone and siltstone, with
> some interbedded red-brown shale and silty shale in upper part and
> some thin gypsum beds at base, about 35 feet above base, and at top.
> The upper two gypsum and (or) dolomite beds are generally pink to
> maroon and less than 1 foot thick; they may erode into mappable
> escarpments about 20 feet apart, being named \"Emanuel Bed\" at top
> (mapped) and \"Relay Creek Bed\" 15 to 20 feet below the top (not
> mapped). In places the basal Marlow is a greenish-gray medium-grained
> sandstone. In Woods and Woodward Counties, the \"Doe Creek Lentil\"
> (Pmd) is a coarse-grained calcareous sandstone with algal clumps and
> invertebrate fossils, ranging up to 70 feet thick from the base of the
> Marlow to the Relay Creek Bed, cropping out in a narrow band of high
> hills striking northeast. Thickness is about 120 feet, with top eroded
> at many places.
>
> **CLINTON-** \"Marlow Formation,\" Pm, orange-brown, fine-grained
> sandstone and siltstone, about 100 to 130 feet thick, thinning
> northward. This formation has 2 gypsum and (or) dolomite beds in upper
> 20 feet\--the \"Emanuel Bed\" (at top) and the \"Relay Creek Bed\" (20
> feet below top). Two thin, pale shales occur; the first is 1 foot
> below the top (\"Gracemont\") and the second is 55 feet above the base
> (unnamed).
>
> **OKLAHOMA CITY-** Mostly orange-brown fine-grained gypsiferous
> sandstone, with some red-brown shale. Contains 10 feet of calcitic
> sandstone lenses near middle and 2 thin dolomites (or gypsums) at top.
> Exposed thickness, about 50 feet (top 50 to 75 feet eroded).
> (Whitehorse Group)
>
> **LAWTON-** \"Marlow Formation,\" Pm, very fine-grained sandstone with
> some silty shale; thickness, about 90 to 130 feet (27 to 40 m);
> contains 2 thin gypsum and (or) dolomite beds in upper 20 feet (6
> m)-the \"Emanuel Bed\" (at top) and the \"Relay Creek Bed\" (20 feet
> below top). (Whitehorse Group)
>
> **ARDMORE-SHERMAN-** Sandstone, orange-brown, fine- to medium-grained,
> moderately indurated, with \"Verden Sandstone Lentil,\" Pmv, 10 feet
> thick near middle, and \"Relay Creek\" and \"Emanuel\" dolomite and
> gypsum beds at top; thickness, 105 to 135 feet. (Whitehorse Group)

### Pmd- Doe Creek Lentil of Marlow Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone
>
> Minor:
>
> Incidental:
>
> **WOODWARD-** In Woods and Woodward Counties, the \"Doe Creek Lentil\"
> (Pmd) is a coarse-grained calcareous sandstone with algal clumps and
> invertebrate fossils, ranging up to 70 feet thick from the base of the
> Marlow to the Relay Creek Bed, cropping out in a narrow band of high
> hills striking northeast.

## Pmv- Verden Sandstone Lentil of Marlow Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone
>
> Minor:
>
> Incidental:
>
> **CLINTON-** The \"Verden Sandstone Lentil,\" Pmv, is a
> coarse-grained, calcareous, fossiliferous sandstone (2 to 10 feet
> thick) that occurs in the middle of the Marlow, about 25 feet below
> the Relay Creek Bed and 85 to 95 feet above the base.
>
> **ARDMORE-SHERMAN-** \"Verden Sandstone Lentil,\" Pmv, sandstone, 10
> feet thick near middle of Marlow Formation
>
> **Per- El Reno Group**
>
> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: shale, gypsum, dolomite
>
> Minor: sandstone, siltstone, conglomerate
>
> Incidental: salt
>
> **CLINTON-** Primarily evaporites and reddish-brown shale, with
> deltaic clastics to the southeast. Where separate formations have not
> been distinguished, the \"El Reno Group\" is mapped as Per; El Reno
> Group. Includes: \"Dog Creek Shale,\" Pdc, reddish-brown shale with
> thin beds of siltstone and dolomite; thickness, about 220 feet;
> gradational eastward into the Chickasha Formation. \"Blaine
> Formation,\" Pb, 3 to 4 gypsum and dolomite beds, about 100 to 200
> feet thick, separated by reddish-brown shale. Gradational southward
> and eastward into Chickasha Formation. \"Flowerpot Shale,\" Pf,
> reddish-brown shale containing several salt and gypsum beds in the
> upper part. Thickness, about 300 to 450 feet; gradational southward
> and eastward into Chickasha Formation and Duncan Sandstone. \"Cedar
> Hill Sandstone,\" Pch, greenish-gray sandstone and reddish-brown
> shales; thickness, about 180 feet; gradational southward into Duncan
> Sandstone. \"Chickasha Formation,\" Pc, reddish-brown to maroon
> mudstone conglomerate with some shale, siltstone, and fine- to
> coarse-grained sandstone; thickness, about 600 feet; gradational
> northward and westward into the Flowerpot Shale and the Blaine
> Formation and westward into Dog Creek Shale. \"Duncan Sandstone,\" Pd,
> light-gray and reddish-brown, cross-bedded, fine-grained sandstone and
> mudstone conglomerate with some interbedded yellowish-gray and
> reddish-brown shales; thickness, about 200 feet; gradational into the
> Cedar Hills Sandstone northward and into the Flowerpot Shale northward
> and westward.
>
> **LAWTON-** Primarily evaporites and reddish-brown shale, with deltaic
> clastics to the east. In the eastern part of the quadrangle, separate
> formations have not been distinguished, and the \"El Reno Group\" is
> mapped as Per; in the western part of the quadrangle, the group has
> been mapped as four separate formations. \"El Reno Group
> undifferentiated,\" Per, in northeastern part of the quadrangle,
> includes \"Chickasha Formation\" sandstone, shale, and siltstone, 400
> to 580 feet (120 to 180 m) thick-and underlying \"Duncan Sandstone\"
> (equivalent to San Angelo Sandstone)-sandstone with some shale, 100 to
> 250 feet (30 to 76 m) thick.

## Pdc- Dog Creek Shale

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: shale
>
> Minor: sandstone, siltstone, gypsum, dolomite
>
> Incidental:
>
> **WOODWARD-** Red-brown shale and silty shale, with gypsum, dolomite,
> and range-brown sandstone. In upper part are many thin, dense
> light-gray dolomite beds, the basal one of which is named \"Southard
> Bed\" (unmapped); in lower part is much satin-spar gypsum with a
> greenish-gray dolomite at top termed \"Watonga Bed\" (unmapped).
> Thickness ranges from 30 feet or less at Kansas border to 100 feet in
> southern part of area.
>
> **CLINTON-** \"Dog Creek Shale,\" Pdc, reddish-brown shale with thin
> beds of siltstone and dolomite; thickness, about 220 feet; gradational
> eastward into the Chickasha Formation.
>
> **OKLAHOMA CITY-** Mostly red-brown silty shale and some fine-grained
> sandstone. Contains one or two layers of thin dolomite (or gypsum) in
> lower part; basal part grades southward into \"Chickasha Formation\".
> Thickness averages about 200 feet. (El Reno Group)
>
> **LAWTON-** \"Dog Creek Shale,\" Pdc, reddish-brown silty shale, 85 to
> 190 feet (26 to 58 m) thick. (El Reno Group)
>
> **ARDMORE-SHERMAN-** Shale, red-brown, blocky, silty, weakly
> indurated, gradational southward into \"Chickasha Formation;\"
> thickness, 0 to about 130 feet. (El Reno Group)

## Pb- Blaine Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: gypsum, dolomite, shale
>
> Minor:
>
> Incidental:
>
> **WOODWARD-** Alternating cyclic sequence of 3 or 4 massive gypsum
> beds with red-brown shales, generally with a named dolomite at the
> base of each gypsum, and a greenish-gray shale at the base of each
> dolomite. The named unmapped sequence is (ascending) \"Cedar Springs
> Dolomite, Medicine Lodge Gypsum,\" shale, \"Magpie Dolomite,
> Nescatunga Gypsum,\" shale, \"Altona Dolomite, Shimer Gypsum,\" shale,
> and\"Haskew Gypsum\" at top. Thickness ranges up to 90 feet, with the
> shales being thinner northward.
>
> **CLINTON-** \"Blaine Formation,\" Pb, 3 to 4 gypsum and dolomite
> beds, about 100 to 200 feet thick, separated by reddish-brown shale.
> Gradational southward and eastward into Chickasha Formation.
>
> **OKLAHOMA CITY-** Mostly thin gypsums with thin dolomites below each
> gypsum, interbedded with red-brown shale; grades southward into
> \"Chickasha Formation\". Thickness, 50 to 75 feet. (El Reno Group)
>
> **LAWTON-** \"Blaine Formation,\" Pb, interbedded gypsum, dolomite,
> and shale, 190 to 215 feet (58 to 66 m) thick. \"Van Vacter Member,\"
> Pbv, of the Blaine Formation contains 6 dolomite-gypsum-shale
> sequences with a total thickness of 80 to 105 feet (24 to 32 m); \"Elm
> Fork Member,\" Pbe, contains 3 dolomite-gypsum sequences with a total
> thickness of 80 to 110 feet (24 to 34 m).

## Pbv- Van Vacter Member of Blaine Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: gypsum, dolomite, shale
>
> Minor:
>
> Incidental:
>
> **LAWTON-** \"Van Vacter Member,\" Pbv, of the Blaine Formation
> contains 6 dolomite-gypsum-shale sequences with a total thickness of
> 80 to 105 feet (24 to 32 m).

## Pbe- Elm Fork Member of Blaine Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: gypsum, dolomite
>
> Minor:
>
> Incidental:
>
> **LAWTON-** \"Elm Fork Member,\" Pbe, of the Blaine Formation contains
> 3 dolomite-gypsum sequences with a total thickness of 80 to 110 feet
> (24 to 34 m).

## Pch- Cedar Hill Sandstone

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: sandstone, shale
>
> Minor: siltstone
>
> Incidental:
>
> **WOODWARD-** Orange-brown to greenish-gray fine-grained sandstone and
> siltstone, with some red-brown shale. Thickness ranges up to 180 feet,
> with more sandstone to the north and more shale to the south.
>
> **ENID-** Mainly orange-brown, fine-grained quartzose sandstone.
> Thickness about 180 feet (55 m). (El Reno Group)
>
> **CLINTON-** \"Cedar Hill Sandstone,\" Pch, greenish-gray sandstone
> and reddish-brown shales; thickness, about 180 feet; gradational
> southward into Duncan Sandstone.
>
> **OKLAHOMA CITY-** Lenticular beds of orange-brown fine-grained
> sandstone and red-brown shale; lower part grades southward into
> \"Duncan Sandstone\". \"Piedmont Sandstone Bed\" at base. Thickness,
> 180 feet (only lower 80 feet exposed in mapped area). (El Reno Group)
>
> **Pf- Flowerpot Shale**
>
> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: shale, siltstone
>
> Minor: dolomite, gypsum, salt, sandstone
>
> Incidental:
>
> **WOODWARD-** Red-brown silty shale with some thin gypsum and dolomite
> beds in upper 50 feet and fine-grained sandstones in upper part to
> north. The middle and upper parts contain 50 feet or more of rock salt
> in the immediate subsurface, giving origin to the Ferguson Salt Plain
> in Blaine County and the Big and Little Salt Plains in Woods and
> Harper Counties on the Cimarron River. Thickness ranges from 180 feet
> in north part to 430 feet in south part. The \"Chickasha Formation\"
> (Pc) is a deltaic tongue of red-brown to greenish-gray to orange-brown
> cross-bedded mudstone conglomerate, siltstone, shale, and fine-grained
> sandstone, about 30 feet thick, in the middle of the Flowerpot Shale,
> pinching out northward.
>
> **CLINTON-** \"Flowerpot Shale,\" Pf, reddish-brown shale containing
> several salt and gypsum beds in the upper part. Thickness, about 300
> to 450 feet; gradational southward and eastward into Chickasha
> Formation and Duncan Sandstone.
>
> **OKLAHOMA CITY**- Mostly red-brown silty clay shale with stringers of
> gypsum (satin spar and selenite); grades southward into \"Chickasha
> Formation\". Thickness, 20 to 40 feet. (El Reno Group)
>
> **LAWTON-** \"Flowerpot Shale,\" Pf, reddish-brown and greenish-gray
> shale, interbedded with greenish-gray siltstone; thickness, about 175
> to 195 feet (53 to 59 m).

## Pc- Chickasha Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: mudstone conglomerate, shale, siltstone
>
> Minor: sandstone
>
> Incidental:
>
> **WOODWARD-** The \"Chickasha Formation\" member of Flower Pot Shale
> (Pc) is a deltaic tongue of red-brown to greenish-gray to orange-brown
> cross-bedded mudstone conglomerate, siltstone, shale, and fine-grained
> sandstone, about 30 feet thick, in the middle of the Flowerpot Shale,
> pinching out northward.
>
> **CLINTON-** \"Chickasha Formation,\" Pc, reddish-brown to maroon
> mudstone conglomerate with some shale, siltstone, and fine- to
> coarse-grained sandstone; thickness, about 600 feet; gradational
> northward and westward into the Flowerpot Shale and the Blaine
> Formation and westward into Dog Creek Shale.
>
> **OKLAHOMA CITY-**Variegated mudstone conglomerate and red-brown to
> orange- brown silty shale and siltstone, with minor amounts of
> orange-brown fine-grained sandstone; upper part grades northward into
> \"Dog Creek Shale\", \"Blaine Formation\", \"Flowerpot Shale\", and
> upper part of \"Cedar Hills Sandstone\"; lower part grades into
> \"Duncan Sandstone\". Thickness, about 100 feet near Chickasha and 300
> feet near Okarche. (El Reno Group)
>
> **ARDMORE-SHERMAN-** Mudstone conglomerate, siltstone, and sandstone,
> red-brown; thickness, 100 to 200 feet, decreasing southeastward. (El
> Reno Group)

## Pd- Duncan Sandstone

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone, mudstone conglomerate
>
> Minor: shale, siltstone
>
> Incidental:
>
> **CLINTON-** \"Duncan Sandstone,\" Pd, light-gray and reddish-brown,
> cross-bedded, fine-grained sandstone and mudstone conglomerate with
> some interbedded yellowish-gray and reddish-brown shales; thickness,
> about 200 feet; gradational into the Cedar Hills Sandstone northward
> and into the Flowerpot Shale northward and westward.
>
> **OKLAHOMA CITY**- Mainly red-brown to orange-brown fine-grained
> sandstone, with some mudstone conglomerate and shale; grades northward
> into \"Cedar Hills Sandstone\" and \"Chickasha Formation\". Thickness,
> 450 feet near Chickasha, 300 feet near Oklahoma City, and 100 feet or
> more near Okarche. (El Reno Group)
>
> **ARDMORE-SHERMAN-** Sandstone, white to buff, fine- to
> coarse-grained, moderately indurated, with interbedded mudstone
> conglomerates and siltstones; thickness, 100 to 400 feet, decreasing
> southeastward. (El Reno Group)

**Psa- San Angelo Sandstone**

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone, mudstone conglomerate, shale
>
> Minor: siltstone
>
> Incidental:
>
> **LAWTON-** \"San Angelo Sandstone,\" Psa, interstratified sandstone,
> mudstone conglomerate, and shale, as much as 80 feet (24 m) thick.

## Phy- Hennessey Group

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: shale
>
> Minor: siltstone, sandstone
>
> Incidental:
>
> **CLINTON-** Reddish-brown shale with some thin, greenish-gray
> siltstone and orange-brown sandstone and siltstone beds; thickness,
> about 500 feet. The \"Hennessey Group\" is not subdivided in the
> southern part of the Clinton quadrangle; in the northeastern corner of
> the quadrangle, the upper part of the \"Bison Formation,\" Pbi, is
> exposed as orange-brown and greenish-gray, fine-grained sandstone and
> siltstone. The Bison is gradational southward into reddish-brown
> shale; it thins southward and is about 120 feet thick.
>
> **LAWTON-** \"Hennessey Group,\" Phy, reddish-brown to gray shale with
> some tan sandstones, 130 to 200 feet (40 to 60 m) thick (locally
> unconformable on Cambrian igneous rocks).
>
> **Comments**: Named from town of Hennessey, northern Kingfisher Co,
> OK, (Aurin and others, 1926). in the Anadarko basin. The shales of the
> Hennessey are rarely fissile or laminated; instead they are more
> commonly blocky and break with a conchoidal fracture with the
> appearance of \"joint clay.\" Characterized by numerous bands or
> streaks which are white or light green in color varying in thickness
> from a few inches to 4+ ft. (S. Oklahoma folded belt province).

## Pbi- Bison Formation or Bison Shale

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: shale, sandstone, siltstone
>
> Minor:
>
> Incidental:
>
> **WOODWARD-** "Bison Formation"- Mostly orange-brown to greenish-gray
> fine-grained sandstone. Thickness ranges up to 120 feet
>
> **ENID-** \"Bison Formation\"-Mainly red-brown shale and greenish-gray
> and orange-brown calcitic siltstone with minor sandstone in Garfield
> County. Thickness, about 120 feet (35 m). (Hennessey Group)
>
> **CLINTON-** \"Bison Formation,\" Pbi, is exposed as orange-brown and
> greenish-gray, fine-grained sandstone and siltstone. The Bison is
> gradational southward into reddish-brown shale; it thins southward and
> is about 120 feet thick.
>
> **OKLAHOMA CITY-** \"Bison Formation\"-Mostly red-brown shale; grades
> northward into many thin greenish-gray calcitic siltstones and some
> orange-brown fine-grained sandstones and siltstones. \"Reeding
> Sandstone Bed\" at base. Thickness ranges from 95 feet in south to 120
> feet in north. (Hennessey Group)
>
> **ARDMORE-SHERMAN-** \"Bison Shale\"-Shale, gray to red-brown,
> calcareous, blocky; thickness, 50 to 90 feet, decreasing southward.
> (Hennessey Group)
>
> **Ppo- Post Oak Conglomerate**
>
> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: mixed clastic conglomerate
>
> Minor:
>
> Incidental:
>
> **LAWTON-** \"Post Oak Conglomerate,\" Ppo, limestone conglomerate
> near limestone outcrops; contains zeolite-opal (\"Tepee Creek
> Formation\") locally, near gabbro and anorthosite outcrops; arkosic
> gravel and cobbles near igneous outcrops. These rock types are
> interbedded with sand, silt, clay, and shale, as much as 500 feet (150
> m) thick at surface but several thousand feet thick in subsurface,
> extending down section into Pennsylvanian rocks.
>
> **Comments:** Named from Post Oak Creek, and from Post Oak Mission in
> the NE corner of Comanche Co, OK, S. Oklahoma folded belt province,
> where unit is thick and well developed (Chase, 1954). Present also in
> southeastern Kiowa and southwestern Caddo Cos, OK. Consists of
> conglomerate and arkose beds\--four distinct litho-facies: 1) granite
> boulder conglomerate, 2) rhyolite porphyry conglomerate, 3) limestone
> boulder conglomerate, and 4) conglomerate with zeolite-opal cement.
> Post Oak is a near-shore facies of lower part of Wichita formation.

**Psp- Salt Plains Formation**

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: shale, siltstone, sandstone
>
> Minor:
>
> Incidental: salt
>
> **WOODWARD-** Orange-brown fine-grained sandstone and siltstone, with
> a greenish-gray sandstone in middle 30 feet (\"Crisfield Sandstone
> Member\") unmapped. Thickness ranges up to 160 feet
>
> **ENID-** Mainly red-brown shale with several thin beds of orange-
> brown, fine-grained sandstone. Thickness about 160 feet (50 m).
> (Hennessey Group)
>
> **OKLAHOMA CITY-** Red-brown blocky shale orange-brown siltstone,
> grades southward into Pp \"Purcell Sandstone\" in Norman area.
> Thickness, 200 feet. (Hennessey Group)
>
> **Comments:** Anadarko basin in Woods Co, OK. Consists of a zone of
> rock-salt, red shales, with some sandstone, in which \"saline
> impregnations are common.\" Is 155 ft thick

**Pp- Purcell Sandstone**

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: sandstone
>
> Minor: shale, conglomerate
>
> Incidental:
>
> **OKLAHOMA CITY-** Red-brown to maroon fine- to coarse-grained
> sandstone, mudstone conglomerate, and red- brown shale. Thickness, 150
> feet. (Hennessey Group)
>
> **ARDMORE-SHERMAN**- Sandstone, red-brown to maroon and greenish-gray,
> fine- to coarse-grained, with some shale and mudstone conglomerate;
> thickness, 90 to 150 feet, decreasing southward. (Hennessey Group).

## Pk- Kingman Formation or Kingman Siltstone

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian

Lithology:

> Major: siltstone, sandstone
>
> Minor: shale
>
> Incidental:
>
> **WOODWARD-** \"Kingman Formation\"- Orange-brown to greenish-gray
> fine-grained sandstone and siltstone, with some red-brown shale.
> Thickness is about 70 feet.
>
> **ENID-** \"Kingman Siltstone\"- Mainly red-brown with several thin
> layers of greenish-gray and orange-brown calcitic siltstone.
> Thickness, about 70 feet (20 m). (Hennessey Group)
>
> **OKLAHOMA CITY-** \"Kingman Siltstone\"- Orange-brown to greenish-
> gray, even bedded siltstones with some fine-grain sandstone and
> red-brown shale; grades southward into \"Purcell Sandstone\".
> Thickness, 30 feet. (Hennessey Group)

## Pfa- Fairmont Shale

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: shale
>
> Minor: siltstone
>
> Incidental:
>
> **WOODWARD-** Red-brown blocky shale with some greenish-gray calciti
> siltstones. Thickness ranges up to 160 feet.
>
> **ENID-** Mainly red-brown shale with many thin layers of calcitic
> siltstone in upper 60 feet (18 m). Thickness, about 150 feet (45 m).
> (Hennessey Group)
>
> **OKLAHOMA CITY-** Red-brown blocky shale; grades into \"Garber
> Sandstone\" at base. Thickness, 30 feet at Oklahoma City, 110 feet
> near Purcell, and 120 feet near Kingfisher. (Hennessey Group)
>
> **ARDMORE-SHERMAN-** Shale, red-brown, blocky; thickness, 40 to 80
> feet, decreasing southward. (Hennessey Group)

## Pg- Garber Sandstone

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: sandstone, conglomerate
>
> Minor: shale, siltstone, chert
>
> Incidental:
>
> **ENID-** Mostly orange-brown, fine- to medium-grained quartzose
> sandstone and conglomerate, grading northward into shale and calcitic
> siltstone. Thickness, about 600 feet (180 m). (Sumner Group)
>
> **OKLAHOMA CITY-** Mostly orange-brown to red-brown fine-grained
> sandstone, irregularly bedded with red-brown shale and some chert and
> mudstone conglomerate. Thickness ranges from 150 feet in south to 400
> feet or more in north. (Sumner Group)
>
> **LAWTON-** \"Garber Sandstone,\" Pg, reddish-brown, fine-grained
> sandstone and mudstone conglomerate, 160 to 210 feet (49 to 64 m)
> thick, containing a basal sandstone, the \"Asphaltum Sandstone Bed,\"
> about 10 to 60 feet (3 to 18 m) thick.(Sumner Group)
>
> **ARDMORE-SHERMAN-** Sandstone, red-brown, fine- to coarse-grained;
> thickness, about 110 to 150 feet, including Fairmont Shale west of
> Elmore City, Garvin County

## Pw- Wellington Formation

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Early Permian
>
> Lithology:
>
> Major: shale, sandstone, conglomerate
>
> Minor: chert
>
> Incidental:
>
> **ENID-** Mostly red-brown shale to north, grading into fine-grained
> sandstone and mudstone conglomerate southward into Logan County.
> Thickness, about 850 feet (260 m). (Sumner Group)
>
> **OKLAHOMA CITY-** Red-brown shale and orange-brown fine-grained
> sandstone, containing much maroon mudstone conglomerate and chert
> conglomerate to south. Thickness ranges from about 150 feet in south
> to 500 feet in north. (Sumner Group)
>
> **LAWTON-** Maroon shale, about 130 feet (40 m) thick, with
> greenish-gray and black sandstone of the \"Ryan Sandstone Bed\" at
> base. (Sumner Group)
>
> **ARDMORE-SHERMAN-** Shale, red-brown, with several 20- to 30-foot
> bituminous sandstones at base (\"Ryan\"); thickness, about 100 to 200
> feet, decreasing southeastward.
>
> **Comments**: Occurs in north-central OK on the Chautauqua platform
> and in the Anadarko basin, and in adjoining KS. Consists of gray to
> bluish and drab shales with numerous thin beds of gray \"mud-stone.\"
> Beds of red sandstone present at the \"color-change line\" changing
> the color of the shales from gray and drab to red. In KS lies on Pearl
> shale member of the Marion formation, but in OK the Pearl shale member
> cannot be readily differentiated from the Wellington and thus is
> mapped with the Wellington. In northern OK, thickness of the
> Wellington is approximately 600 ft and thickness of the Pearl is 70
> ft. (Aurin, 1926)

## Pu- Permian rocks undifferentiated

> Series: Permian
>
> Maximum Age: Early Permian
>
> Minimum Age: Late Permian
>
> Lithology:
>
> Major: shale, sandstone, siltstone
>
> Minor: limestone, dolomite, gypsum
>
> Incidental: salt
>
> **TEXAS-** Red to dark reddish-brown shale, sandstone, and siltstone.
> Gypsum occurs in all rock units as a cementing agent, as tiny flakes,
> as thin irregular veinlets, and as discontinuous beds ranging from
> less than an inch to more than 30 feet thick. Maximum thickness
> exceeds 2,000 feet
>
> **BEAVER-** Red shale, sandstone, and siltstone, are predominant rocks
> with lesser amounts of limestone, dolomite, gypsum, and salt. The
> undifferentiated Permian rocks include the Whitehorse Group, the Cloud
> Chief Formation, and the Quartermaster Formation; also included are
> local outcrops in the southwestern part of the county, which maybe
> Triassic in age, 3,800 feet thick
>
> **\*u-Oscar Group**
>
> Series: Pennsylvanian
>
> Maximum Age: Late Pennsylvanian
>
> Minimum Age: Late Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone, limestone
>
> Minor:
>
> Incidental:

## ENID- Mainly shale with many layers of limestones that pinch out southward, where fine-grained arkosic sandstones are thicker and more numerous. Near Kansas border, sequence is (descending): \"Herington Limestone\" (20 feet thick) at top, \"Enterprise Shale\" (45 feet thick), \"Winfield Limestone, \"IPowi (8 feet thick), \"Gage Shale\" (80 feet thick), \"Towanda Limestone\" (3 feet thick), \"Holmesville Shale\" (25 feet thick), \"Fort Riley Limestone,\" IPofr (30 feet thick) and underlying Florence Flint, IPofr (8 feet thick), \"Blue SpringsShale\" (60 feet thick), \"Kinney Limestone\" (5 feet thick), \"Wymore Shale\" (22 feet thick), \"Wreford Limestone,\" IPowr (25 feet thick), \"Speiser Shale\" (38 feet thick), \"Funston Limestone (4 feet thick), \"Blue Rapids Shale\" (15 feet thick),\"Crouse Limestone\" (6 feet thick), \"Easly Creek Shale\" (12 feet thick), \"Bader Limestone\" (5 feet thick), \"Stearns Shale\" (10 feet thick), \"Morrill Limestone\" (2 feet thick), \"Florena Shale\" (6 feet thick), \"Cottonwood Limestone,\" IPoc (3 feet thick), \"Eskridge Shale\" (6 feet thick), and \"Neva Limestone\" (25 feet thick) at base. Total thickness, about 400 feet.

> **OKLAHOMA CITY-** Red-brown to gray shale and orange-brown
> fine-grained, crossbedded sandstone; grades southward into arkosic
> sandstone and conglomerate. Includes \"Herington Limestone\" at top in
> Payne County, \"Neva Limestone\" (0.2 to 1.2 feet thick) at base in
> Lincoln County, and \"Hart Limestone\" (4 to 10 feet thick)at base in
> Pottawatomie County. In Payne County, includes thin stringers of
> \"Winfield Limestone,\" IPowi (75 feet below top), \"Fort Riley
> Limestone,\" IPofr (245 feet below top),\"Wreford Limestone,\" IPowr
> (345 feet below top), and \"Cottonwood Limestone,\" IPoc (525 feet
> below top). Thickness ranges from 300 feet in south to 600 feet in
> north.
>
> **LAWTON-** Shale, sandstone, and arkose, 300 to 500 feet (90 to 150
> m) thick, base covered.
>
> **ARDMORE-SHERMAN-** Shale, red-brown to gray, with arkosic sandstones
> and limestone conglomerates near Arbuckle Mountains; \"Hart
> Limestone\" at base; thickness, 300 to 500 feet, decreasing
> southeastward. (Pontotoc Group)
>
> **\*v- Vanoss Group**
>
> Series: Pennsylvanian
>
> Maximum Age: Late Pennsylvanian
>
> Minimum Age: Late Pennsylvanian
>
> Lithology:
>
> Major: limestone, shale, sandstone
>
> Minor: conglomerate
>
> Incidental:
>
> **ENID-** Alternating layers of limestone and shale to north, grading
> southward into limestone, shale, and fine-grained arkosic sandstone.
> Locally group contains thin coal seams. Near Kansas border, group
> includes (descending): \"Salem Point Shale\" (12 feet thick) at top,
> underlain by \"Burr Limestone\" (8 feet thick), \"Legion Shale\" (4
> feet thick), \"Sallyards Limestone\" (3 feet thick), \"Roca Shale\"
> (15 feet thick), \"Red Eagle Limestone,\" IPvre (20 feet thick),
> \"Johnson Shale\" (35 feet thick), \"Long Creek Limestone,\" IPvlc (10
> feet thick), unnamed shale (3 feet thick), \"Hughes Creek Limestone
> (15 feet thick), unnamed shale (12 feet thick), \"Americus Limestone,
> \"IPvam, (12 feet thick), \"Oaks Shale\" (3 feet thick), \"Houchen
> Creek Limestone (8 feet thick), \"Stine Shale\" (20 feet thick),
> \"Five Point Limestone\" (3 feet thick), unnamed shale (12 feet
> thick), \"Brownville Limestone, IPvb (8 feet thick), \"Pony Creek
> Shale\" (40 feet thick), \"Grayhorse Limestone,\" IPvg (5 feet thick),
> unnamed shale (12 feet thick), \"Nebraska CityLimestone\" (5 feet
> thick), \"French Creek Shale\" (12 feet thick), \"Jim Creek
> Limestone\" (3 feet thick), \"Friedrich Shale\" (30 feet thick),
> \"Grandhaven Limestone\" (2 feet thick), \"Dry Shale\" (25 feet
> thick), \"Dover Limestone\" (30 feet thick), \"Willard-Langdon Shale\"
> (110 feet thick), \"Elmont Limestone,\" IPve (10 feet thick),
> \"Stonebreaker Shale\" (20 feet thick), and \"Reading Limestone\" (20
> feet thick) at base. Total thickness, about 500 feet (150 m).
>
> **OKLAHOMA CITY**- Red-brown to gray shale and orange-brown
> fine-grained, crossbedded sandstone; grades southward into arkosic
> sandstone and conglomerate. Includes many thin limestone beds and
> shale units north of North Canadian River (descending): \"Roca
> Shale\"(75 feet thick), \"Red Eagle Limestone,\" IPvre (3 to 8
> feetthick), \"Johnson Shale\" (60 feet thick), \"Long Creek
> Limestone,\" IPvlc (9 to 12 feet thick), \"Hughes Creek Shale\" (52
> feet thick), \"Americus Limestone,\" IPva (1.0 to 2.5 feet thick),
> \"Admire Shale\" (70 feet thick), \"Brownville Limestone,\" IPvb (1 to
> 3 feet thick), \"Pony Creek Shale\" (75 feet thick), \"Grayhorse
> Limestone,\" IPvg (1 foot thick), unnamed shale (70 feet thick),
> \"Elmont Limestone,\" IPve (1.2to 7.8 feet thick), \"Stonebreaker
> Shale\" (60 feet thick), and \"Reading Limestone\" (1.5 feet thick),
> at base. Total thickness of group ranges from 250 feet in south to 490
> feet in north.
>
> **ARDMORE-SHERMAN-** Shale, maroon, arkose, and limestone
> conglomerate; thickness, 250 to 900 feet (subsurface), decreasing
> southward. (Pontotoc Group)

**Comments:** Named for town of Vanoss, situated on the outcrop in
north-central part of T3N, R4E, Pontotoc Co, OK, Arkoma basin, as basal
of 3 formations of Pontotoc terrane \[Group\], (Morgan,1924). Consists
of alternating sandstones, conglomerates, shales, and a few thin
limestones. All strata are arkosic, some of the sandstones so much so
that they might be taken for true granites. Arkosic material decreases
upward, as sandstones become less prominent. Near center of formation
there are several thin limestone beds (not observed north of Canadian
River) that are generally argillaceous, grading into shale; they are
light gray and relatively soft when fresh, but upon weathering become
hard and white. Shales, predominant in upper portion, are light in
color, ranging through shades of green and gray, with occasional red
shale. Thickness increases southward. Exposed portion east of Konawa is
only about 250 ft, while near southwest corner of quad is about 650 ft
thick.

> **\*a- Ada Group or Ada Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Late Pennsylvanian
>
> Minimum Age: Late Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone, limestone
>
> Minor: conglomerate
>
> Incidental:

## ENID- "Ada Group"- Mainly shale with many limestone layers that are thinner and pinch out southward, where fine-grained sandstones are thicker and more numerous. Near Kansas border, group includes (descending): \"Auburn shale\" (50 feet thick) at top, underlain by \"Wakarusa Limestone,\" IPaw (2 feet thick), unnamed shale (40 feet thick), \"Rulo Limestone\" (3 feet thick), unnamed shale (18 feet thick), \"Happy Hollow Limestone\" (2 feet thick), unnamed shale and sandstone (60 feet thick), \"Bird Creek Limestone,\" IPab (2 feet thick; called \"Church Limestone\" in Kansas), \"Severy-Aarde Shale\" (70 feet thick), \"Turkey Run Limestone,\" IPat (2 feet thick; called \"Coal Creek Limestone\" in Kansas), unnamed shale (30 feet thick), \"Pearsonia Limestone\" (3 feet thick), unnamed shale (15 feet thick), \"Little Hominy Limestone\" (22 feet thick), \"Deer Creek Limestone (15 feet thick), unnamed shale (10 feet thick), \"Plummer Limestone\" (2 feet thick), unnamed shale (35 feet thick), and \"Beil Limestone Member\" (10 feet thick) of \"Lecompton Limestone\" at base. Total thickness, about 400 feet (120 m).

> **OKLAHOMA CITY-** "Ada Group"- Mostly orange-brown fine-grained
> sandstone and red-brown to gray shale; grades southward into chert
> conglomerates. Includes the following thin limestone beds and shale
> units north of North Canadian River (descending): \"Auburn Shale\" (80
> feet thick), \"Wakarusa Limestone,\" IPaw (1 to 6 feet thick), unnamed
> shale (95 feet thick), \"Bird Creek Limestone,\" IPab (1 to 9 feet
> thick), \"Severy-Aarde Shale\" (45 feet thick), \"Turkey Run
> Limestone,\" IPat (1 foot thick), unnamed shale (45 feet thick), and
> \"Lecompton Limestone\" (1.5 to 10 feet thick), at base. Total
> thickness of group ranges from 100 feet in south to 280 feet in north.
>
> **ARDMORE-SHERMAN-** \"Ada Formation\"- (= Collings Ranch
> Conglomerate) Shale, red-brown to gray, bituminous sandstone, and
> limestone conglomerate; thickness, 100 to 1,400 feet (subsurface),
> decreasing southward.

**Comments:** Named for town of Ada, Pontotoc Co, OK. Type area
lieswithin and to west of Ada; outcrop extends from northern edge of
Stonewall quad, north of Vamoosa, southwestward to a point about 3 mi
southeast of Roff. Is in Pontotoc and Seminole Cos, OK, Chautauqua
platform and Arkoma basin.(Morgan,1924) Average thickness 100 ft.
Limestone conglomerates and coarse sandstones very prominent in greater
part of outcrop. Clastic material decreases to north; near Vamoosa very
scarce.With decrease in amount of clastics northward, formation becomes
thinner\--only 60 ft thick at northern edge of quad. Also contains
light-colored shales. Conglomerates and sandstones are
characteristically saturated with asphalt; north of Canadian River,
asphaltic strata less numerous than to south. Source of asphalt unclear;
possibly heavy oil from exposed asphaltic sands of Simpson formation was
brought out and deposited. Fossils rare. Near base is a thin black
limestone that is very persistent near Ada.

> **\*va-Vamoosa Group or Vamoosa Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Late Pennsylvanian
>
> Minimum Age: Late Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor: conglomerate
>
> Incidental:
>
> **OKLAHOMA CITY-** Alternating thin to massive layers of fine- to
> coarse-grained sandstone and sandy, silty shale containing some chert
> conglomerate in middle and lower parts of formation. Thickness ranges
> about 200 to about 690 feet.
>
> **ARDMORE-SHERMAN-** Shale, sandstone, and chert conglomerate;
> red-brown to buff fine- to coarse-grained sandstone. Subdivided into
> 12 members, each with coarse clastics at base overlain by shale.
> Thickness, about 125 to 260 feet (to 1,000 feet in subsurface),
> decreasing southward.
>
> **Comments**: Named after village of Vamoosa, northern part of
> Stonewall quad, Seminole Co, OK, which is 1/2 mi west of outcrop. In
> Stonewall quad, is exposed over approximately 20 sq mi. From northern
> edge of quad (Seminole Co, Chautaqua platform) outcrop trends in a
> south-westerly direction to an area 1/2 mi east of Byng. South of Byng
> (Pontotoc Co, Arkoma basin) is exposed on what is believed to be an
> outlier. Where all of formation is exposed, average thickness is 260
> ft. Consist of (ascending): 30 ft. of dark shale, main mass of
> formation, which includes 260 ft of chert conglomerates, and massive,
> coarse, red and brown sandstones, and red shales. Clastic material
> finer near top and red coloration less pronounced near top. Vamoosa
> contains greater thickness of chert conglomerate than any other
> formation in the area. Chert fragments which make up the conglomerates
> are mostly angular; range in size from a fraction of an inch to 3
> inches. (Morgan, 1924)
>
> **\*ho- Hoxbar Group**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: limestone, sandstone, shale
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Upper most member of Glenn Fm, consisting of
> brown limestone, white sandstone, and shale. \"Zuckerman Sandstone\"
> (top eroded) down to base of \"Confederate Limestone;\" thickness,
> 2,800 feet. Occurs in the ARDMORE BASIN
>
> **Comments:** Probably named for town of Hoxbar, Carter Co, OK, in the
> Ardmore Basin, S. Oklahoma folded belt province. Type area given in
> secs 26 and 35, T5S, R2E, Carter Co, OK. Occurs southeast of Ardmore
> and west of Hoxbar. Consists chiefly of shales, divided into the
> following members (ascending): Confederate limestone, Union Dairy,
> Westheimer, Crinerville, Anadarche, Daube, and Zuckermann. These
> members separated from each other by unnamed parts of Hoxbar. Basal
> part consists of several brown limestones, one of which is prolific
> FUSILINA CYLINDRICA horizon. Upper part consists of white sandstones
> separated by light-blue to yellow and red shales. Becomes less
> calcareous toward the southeast. Near top of member, 4 mi southeast of
> Ardmore, a coal seam 2-4 ft thick occurs. Total thickness of Hoxbar is
> 4,000 ft. (Goldston, 1922).

**\*ht- Hilltop Formation**

> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, siltstone, sandstone
>
> Minor:
>
> Incidental:
>
> **OKLAHOMA CITY-** Mainly shale, grading upward into massive siltstone
> and fine- grained sandstone; grades northward into \"Barnsdall
> Formation\", \"Chanute Formation\", and \"Dewey Limestone\". Thickness
> ranges from 0 to 200 feet.

## ARDMORE-SHERMAN- Shale, blue-gray to red-brown, with buff siltstones and fine-grained sandstones at top; thickness, about 70 feet.

> **\*bv- Vamoosa + Tallant + Barnsdall Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, siltstone, sandstone
>
> Minor: limestone
>
> Incidental:
>
> **TULSA-** \"Vamoosa Formation,\" shale, sandstone, siltstone, and
> thin limestone. \"Tallant Formation,\" shale, sandstone, and thin
> limestone. \"Barnsdall Formation,\" shale, siltstone, sandstone, and
> thin limestone
>
> **\*to- Torpedo Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor:
>
> Incidental:
>
> **TULSA-** Thin-bedded to massive medium-grained sandstone and shale
>
> **\*ta- Tallant Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor:
>
> Incidental:
>
> **ENID-** Alternating layers of shale and fine- to medium-grained
> sandstone. Thickness ranges from 75 to 250 feet (23 to 75 m).
>
> **OKLAHOMA CITY-** Mostly fine- to medium-grained sandstone 10 to 60
> feet thick overlain by shale 25 to 65 feet thick. Cut out by \"Vamoosa
> Formation\" in central part of area. Total thickness ranges from 0 to
> 100 feet.
>
> **Comments**: Named from town of Tallant, Osage Co, OK, Chautauqua
> platform. Occurs from T23N to the KS-OK state line. Consists of
> sandstone and shale. Many of the sandstone beds are fine grained and
> tightly cemented; locally some are moderately coarse grained and
> poorly sorted. Thickness varies from approximately 0 ft to 400 ft
> Divided into (ascending) the Bigheart sandstone member, at base, which
> is separated from the Revard sandstone member by unnamed shales. The
> Revard is overlain by unnamed shale with lenticular sandstone bodies.
> (Oakes, 1951)
>
> **\*bd- Barnsdall Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: sandstone, shale
>
> Minor: limestone
>
> Incidental:
>
> **ENID-** Formation is mainly fine- to medium-grained sandstone,
> overlain by shale. At top is a thick shale, with \"Okesa Sandstone
> Member\" in middle and \"Birch Creek Limestone\" (called \"South Bend
> Limestone\") at base. Birch Creek extends southward from Kansas border
> to Township 23 N., where limestone grades into overlying Okesa
> Sandstone. South of Township 23 N., Okesa grades downward into
> underlying \"Torpedo Sandstone\" and underlying Wann Formation. Total
> thickness ranges from 45 to 200 feet (14 to 60 m).
>
> **OKLAHOMA CITY**- Mostly fine-grained sandstone overlain by shale;
> may grade northward into \"Wann Formation\". Thickness ranges from
> about 80 to 200 feet.
>
> **Comments**: Named from the town of Barnsdall, Osage Co, OK,
> Chautauqua platform. Has been mapped southward to the South Canadian
> River. Occurs from KS-OK state line to T13N. Consists of shale, sandy
> limestone, limy sandstone. Thickness varies from approximately 80 ft
> to 300+ ft in this report area. Divided into (ascending) the: Birch
> Creek limestone and Okesa sandstone members, and Wildhorse limestone
> bed. Birch Creek and two overlying unnamed members are separated by an
> unnamed sandy limestone and are present at the KS-OK state line. The
> limestone grades south into the Okesa sandstone member. (Oakes,1951)
>
> **\*wi- Wann and Iola Formations or Iola Limestone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, sandstone, limestone
>
> Minor:
>
> Incidental:

## ENID- \"Wann Formation\" consists of shale and fine- to medium-grained sandstone with many thin layers of fossiliferous limestone. Thickness ranges from 50 to 400 feet (15 to 122 m). \"Iola Limestone\" is mainly limestone, calcareous sandstone, and shale and underlies Wann. Thickness ranges 4 to 100 feet (1 to 30 m).

> **TULSA-** \"Wann Formation,\" shale with thin sandstone and
> limestone.\"Iola Formation,\" limestone and shale.
>
> **OKLAHOMA CITY-** \"Wann Formation,\" shale and fine- to
> medium-grained sandstone; thickness, 40 to 180 feet. Underlying \"Iola
> Limestone,\" mainly fine-grained calcareous sandstone and limestone
> with some shale; thickness, 15 to 20 feet.
>
> **\*ch- Chanute Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: sandstone, shale
>
> Minor:
>
> Incidental: coal
>
> **ENID-** Mainly fine-grained micaceous sandstone and coarse-grained,
> crossbedded sandstone separated by shale. Locally Chanute contains
> thin coal seams. Thickness ranges from about 10 to
>
> 150 feet (3 to 45 m).
>
> **TULSA-** Thin- to thick-bedded, fine- to coarse-grained sandstone
> and shale.
>
> **OKLAHOMA CITY-** Mainly fine- to medium-grained sandstone 3 to 20
> feet thick, overlain by shale 20 to 80 feet thick. Total thickness
> ranges from about 25 to 90 feet.
>
> **\*b- Belle City Formation or Limestone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: limestone, shale
>
> Minor:
>
> Incidental:
>
> **OKLAHOMA CITY-** \"Belle City Limestone\"-Consists of two
> fossiliferous limestone units with an intervening fossiliferous shale.
> Thickness ranges from 12 to20 feet; present in southern part of area
> only, where it is below \"Hilltop Formation\".
>
> **ARDMORE-SHERMAN-** \'Belle City Formation\"-Limestone, gray to buff,
> dense, in 2 beds each 2 to 3 feet thick, with interbedded dark-gray
> shale, 10 to 20 feet thick.
>
> **\*n- Nellie Bly Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone, siltstone, limestone, conglomerate
>
> Minor:
>
> Incidental:
>
> **TULSA-** Shale and thin sandstone.
>
> **ARDMORE-SHERMAN**- Shale, siltstone, fine-grained sandstone, chert
> conglomerate, limestone, and limestone conglomerate, dark-gray to
> buff; thickness, 200 to 300 feet.
>
> **\*hg- Hogshooter Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: limestone
>
> Minor: shale
>
> Incidental:
>
> **TULSA-** Limestone and some shale. (Mapped with the Nellie Bly
> Formation south of Bartlesville)
>
> **Comments:** Named from Hogshooter Creek, Washington Co, OK on the
> Chautauqua platform. Limestone which in its northern extension is
> heavily bedded and massive but to the southward is thin bedded and
> argillaceous. Thickness at the state line is about 10 ft; is 6 or 8 ft
> thick along Hogshooter Creek; is 4 ft Fossils fairly abundant.
> (Ohern,1910).
>
> **\*d- Dewey Formation or Dewey Limestone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: limestone, sandstone, shale
>
> Minor:
>
> Incidental:
>
> **ENID-** \"Dewey Limestone\"- Mainly medium-crystalline limestone and
> shale. Thickness ranges from 0 to 60 feet (0 to 18 m).
>
> **TULSA-** \"Dewey Formation\"- Limestone and some shale. (Mapped with
> the Chanute formation south of Bartlesville)
>
> **OKLAHOMA CITY-** \"Dewey Limestone\"- Mainly sandy limestone or
> calcareous sandstone containing limestone lenses 1.5 to 20 feet thick,
> overlain by shale 5 to 50 feet thick. Total thickness ranges from 20
> to 60 feet.

**Comments:** Named from the town of Dewey, Washington Co, OK on the
Chautauqua platform. Is a bluish, semi-crystalline limestone, usually
somewhat shaly but often massively bedded; on weathering, gives surface
fragments abounding in seams of calcite. At the cement plant at Dewey is
at least 20 ft thick; at Ochelata and Ramona is about 15 ft thick.
(Ohern, 1910)

> **\*nh- Nellie Bly Formation and Hogshooter Limestone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, limestone, sandstone
>
> Minor:
>
> Incidental:
>
> **ENID-** \"Nellie Bly Formation\" consists mainly of shale with a few
> layers of fine- to medium-grained sandstone. Thickness ranges from 80
> to 550 feet (25 to 170 m). Underlying \"Hogshooter Limestone\" is
> massive crinoidal limestone 1 to 50 feet (0.3 to 14 m) thick
>
> **OKLAHOMA CITY-** \"Nellie Bly Formation,\" mainly shale with many
> fine-grained sandstone beds and limestone beds locally in upper part;
> thickness, about 250 to about 550 feet. Underlying \"Hogshooter
> Limestone,\" massive crinoidal limestone 1 to 15 feet thick.
>
> **\*cf- Coffeyville or Francis Formation (restricted)**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, sandstone, limestone
>
> Minor: conglomerate
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale, dark-blue, 20 to 70 feet thick, with
> \"DeNay Limestone,\" yellow, massive, 2 to 6 feet thick at base, and
> 20 feet or more of buff fine- to coarse-grained sandstone and chert
> conglomerate at top. (Upper Franks Conglomerate)
>
> **Comments**: Named for Francis, Stonewall quad, Pontotoc Co, OK,
> westward from which outcrop extends. Type area is that portion of
> outcrop which extends 3 mi north and south of Canadian River, Pontotoc
> and Seminole Cos, OK, Arkoma basin and Chautauqua platform. Includes
> (ascending): DeNay limestone; dark-blue and black shales, about 30 ft;
> these grade upward into sandstones which (on creek bluff west of
> Sasakwa) are 20 ft thick; a series of thick, dark, sometimes
> calcareous shales, average thickness 250 ft (slightly more to north,
> slightly less to south). Lower part of this shale much darker and more
> calcareous than upper part\--contains limestone concretions, often
> fossiliferous; 100 ft of coarse brown sandstones and chert
> conglomerates, with only occasional fossils; 100 ft of shale with a
> few thin sandstones and one persistent conglomeratic limestone (often
> very fossiliferous). (Morgan, 1924)
>
> **\*cc- Coffeyville and Checkerboard Formations or Checkerboard
> Limestone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, sandstone, limestone
>
> Minor: conglomerate
>
> Incidental: coal
>
> **ENID-** \"Coffeyville Formation\" is mainly shale interbedded with
> fine-to medium-grained sandstone. Locally formation contains thin coal
> seams. Thickness ranges from 175 to 470 feet (50 to 140 m). Underlying
> \"Checkerboard Limestone\" is crystalline limestone 2 to 15 feet (1 to
> 5 m) thick.
>
> **TULSA-** \"Coffeyville Formation,\" shale and thin-bedded sandstone.
> \"Checkerboard Formation,\" limestone and some shale.
>
> **OKLAHOMA CITY-** \"Coffeyville Formation,\" mainly shale interbedded
> with fine- to medium-grained sandstone locally containing chert and
> limestone conglomerate and thin coal seams; thickness, 150 to 470
> feet. Underlying \"Checkerboard Limestone,\" crystalline limestone 2.5
> to 5 feet thick.
>
> **\*de- Deese Group**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: sandstone, conglomerate, shale
>
> Minor: limestone
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Member of Glenn Fm, mainly massive sandstone,
> conglomerate and shale. Base of \"Confederate Limestone\" down to top
> of \"Otterville Limestone;\" thickness, 9,700 feet. Occurs in the
> ARDMORE BASIN
>
> **Comments**: Named as one of five members of Glenn formation;
> probably named for the town of Deese, Carter Co, OK, S. Oklahoma
> folded belt province. Occurs in a northwest-southeast exposure just
> east of Deese; north of Ardmore, extends as far east as Santa Fe
> Railway; is in small area immediately west of Glenn; and is east of
> Criner Hills. Deese member has roughest topography in region,
> consisting of a large number of massive sandstones, conglomerates,
> shales, and a few limestones. North of Ardmore, base marked by brown
> limestone bearing an abundance of SPIRIFER CONDOR. South of Ardmore,
> this horizon seen as bed of chert. Total thickness is 6,000-8,000 ft.
> (Goldston, 1922)
>
> **\*do- Dornick Hills Group**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, limestone, conglomerate, sandstone,
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Series of tan shales with limestones, limestone
> conglomerate and sandstone. Top of \"Otterville Limestone\" down to
> base of \"Lake Ardmore Sandstone;\" thickness 1,800 feet. Occurs in
> the ARDMORE BASIN
>
> **Comments**: Named as a formation in the Ardmore basin in southern OK
> in the S. Oklahoma folded belt province. Consists of a series of
> bluish, tan, and rarer reddish and brown shales, with limestones,
> limestone conglomerates and sandstones. Maximum observed thickness of
> about 4,000 ft in north edge of Love Co; decreases northward to about
> 2,500 ft near town of Ardmore; decreases further to less than 1,500 ft
> near Glenn village. (Tomlinson, 1929)
>
> **\*sl- Seminole Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, sandstone, conglomerate
>
> Minor:
>
> Incidental: coal
>
> **TULSA-** Shale, sandstone, and thin coal beds.
>
> **OKLAHOMA CITY-** Chert conglomerate, shale, and fine-grained
> sandstone containing coal seams in upper part locally. Thickness
> ranges from 100 to 375 feet.
>
> **FORT SMITH-** Sandy shale, sandstone, and thin coal seams.
>
> **ARDMORE-SHERMAN-** Shale, gray-green, with buff fine-grained
> sandstones, chert conglomerates, and limy sandstones; thickness, about
> 120 feet. (Upper Franks Conglomerate)

**Comments:** Probably named for Seminole \[Indian\] Nation, where unit
crops out in rugged hilly country in northwestward part of Coalgate
quad, Hughes Co, OK, Chautauqua platform. . About 50 ft of lower part of
Seminole is exposed in a small area in northwest corner of quad. This
part is composed of laminated or stratified subangular chert, with a
sprinkling of quartz pebbles from a diameter of 3 inches to small grains
in a cement of fine brown and usually ferruginous sand. The coarser
conglomerate in the beds at the base is loosely cemented, and on
weathered surfaces it breaks down into rounded boulders and loose
gravel. 40-50 ft from base the conglomerate grades into brown sandstone
which continues upward about 100 ft to top of formation. (Taff, 1901)

> **\*hu- Upper Holdenville Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor: limestone
>
> Incidental:
>
> **ENID**- Mainly shale with interbedded fine-grained sandstone locally
>
> containing beds of limestone. Only a few feet is exposed in quadrangle
>
> **\*h- Holdenville Formation or Holdenville Shale**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone, conglomerate
>
> Minor: limestone
>
> Incidental:
>
> **OKLAHOMA CITY-** \"Holdenville Shale\"- Mainly clay shale with some
> interbedded fine-grained calcareous sandstone locally containing beds
> of crystalline limestone. Thickness ranges from 100 to 280 feet.
>
> **FORT SMITH-** \"Holdenville Shale\"- Shale, thin sandstone and minor
> limestones.
>
> **ARDMORE-SHERMAN-** \"Holdenville Formation\"- Shale, blue-gray, with
> light-brown sandstones and chert conglomerates and 2 prominent
> limestones\--the upper, or \"Sasakwa Limestone,\" white, fine-grained,
> 1 to 15 feet thick, 35 feet below the top, and the lower, or \"Homer
> Limestone,\" dark-brown, sandy, 2 to 10 feet thick, 40 to 70 feet
> below the Sasakwa. Thickness, 210 to 260 feet. (Upper Franks
> Conglomerate)
>
> **Comments**: Probably named for Holdenville, Hughes Co, OK. Coalgate
> quad, OK, where unit is exposed only in small, triangular area in
> northwest corner of quad, in Hughes Co, Chautauqua platform, is 250 ft
> thick. Surface of formation becomes broader northward in the more
> level country about Holdenville, 3 mi north of border of quad.
> Composed of friable blue clay shale, with local thin beds of shelly
> limestone and shaly calcareous sandstone in upper part. Sandstone
> ledges outcrop in terraces around the slopes of the hills bordering
> north side of Little River. The thin limestone occurs about 35 ft
> below top of formation, and its outcrop is usually covered by the
> sandstone and conglomerate debris from the overlying \[Wewoka\]
> formation. In its usual exposure 1-2 ft only of shaly limestone may be
> seen. At other places a bed of shell breccia loosely cemented is
> found, representing the thin, hard plates of the shelly rock. The
> shales are rarely exposed. (Taff, 1901)
>
> **\*lp- Lenapah Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: limestone, shale
>
> Minor:
>
> Incidental:
>
> **TULSA-** Limestone and shale. (Map unit only in Nowata County)
>
> **Comments:** Named for the town of Lenapah, Nowata Co, OK, Chautauqua
> platform. Occurs near the KS State line entirely east of the Verdigris
> River. Is the cap rock of most of the hills in northeast part of the
> Nowata quadrangle. Consists of a single bed of fossiliferous limestone
> which, when unaltered, is a dense, blue, and partly crystalline
> usually containing much fossils, especially brachiopods. Has little or
> no chert. Thickness of the formation is approximately 20 ft in the
> quarry 3 mi north of Lenapah; at Nowata, is 6-8 ft thick; less than 30
> inches thick south of Nowata. (Ohern, 1910)
>
> **\*hl- Holdenville and Lenapah Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone, limestone
>
> Minor:
>
> Incidental:
>
> **TULSA-** \"Holdenville Formation,\" shale and minor sandstone and
> limestone. \"Lenapah Formation\", limestone and shale. (Map unit only
> in Tulsa County)
>
> **\*nw- Nowata Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale
>
> Minor: sandstone, limestone
>
> Incidental:
>
> **TULSA-** Shale and minor sandstone and limestone.
>
> **Comments**: Named for the town of Nowata, Nowata Co, OK, Chautauqua
> platform. No type locality designated. Near the KS State line and east
> of Verdigris River, this formation occupies a narrow band between the
> escarpments of overlying and underlying limestones. . Width of outcrop
> at Nowata is 2+ mi; is greater at Watova; in vicinity of Talala is 5
> mi; east of Tulsa is 8 mi. Consists of a series of shales with a few
> interstratified sandstones and at lest one bed of coal; shales
> generally are bluish or greenish in color, weathering green or buff.
> Thickness varies from 50 ft to 600 ft at Tulsa. (Ohern, 1910)
>
> **\*ol- Oolagah Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: limestone, shale
>
> Minor: sandstone
>
> Incidental:
>
> **TULSA-** Thin-bedded limestone and some shale in the southern part
> of the area. North of Oolagah, in western Rogers County, the map unit,
> IPol, includes the following formations: \"Altamont Formation,\"
> limestone and minor shale; \"Bandera Formation,\" shale and thin
> sandstone; \"Pawnee Formation,\" limestone and minor shale.
>
> **\*w- Wewoka Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor: limestone, conglomerate
>
> Incidental:
>
> **OKLAHOMA CITY-** Interbedded fine- to medium-grained sandstone and
> calcareous shale. Thickness ranges from 400 to 750 feet.
>
> **FORT SMITH-** Shale, sandstone, and minor limestones
>
> **ARDMORE-SHERMAN-** Shale, blue-gray, sandstone, chert conglomerate,
> and limestone conglomerate; thickness, 400 feet
>
> **Comments:** Named from town of Wewoka, Seminole Co, OK, Arkoma basin
> and Chautauqua platform. Is a succession of massive, mostly friable
> sandstones and shales\--7 alternating beds in all\--from 40 to 130 ft
> thick; total thickness of formation 700 ft. Consists of
> (ascending): 1) sandstone division, which is thinner, but generally
> harder, than succeeding 3 sandstone divisions. At base of this
> division are local indurated beds of sandy chert conglomerate, which
> thin east and north; 2) Next is fossiliferous, friable blue clay shale
> 120 ft thick, ending locally in thin, white, fossiliferous limestone.
> 3) Succeeding sandstone member is about 110 ft thick; beds are massive
> and friable, breaking down into loose sand and weathering into rounded
> ledges. 4) Next is soft, fossiliferous blue clay shale nearly 130 ft
> thick; remarkable for abundant, perfectly preserved fossil shells. 5)
> Next is 60-ft thick sandstone bed. 6) Next is a 45-ft shale bed. 7) At
> top is sandstone member estimated 100 ft thick. Uppermost beds of this
> topmost member are shaly, and culminate in a shaly sandy limestone.
> (Taft,1901)
>
> **\*we- Wetumka Shale**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale
>
> Minor: sandstone, siltstone limestone
>
> Incidental:
>
> **OKLAHOMA CITY-** Mainly sandy, silty, laminated shale 100 to 200
> feet thick
>
> **FORT SMITH**- Shale, minor sandstones, and minor limestones
>
> **ARDMORE-SHERMAN-** Shale, blue-gray, with some sandstones and
> siltstones; thickness, 120 to 250 feet
>
> **Comments**: Composed of friable, laminated clay shales except for
> thin, shaly sandstone layers near center. Estimated to be about 120 ft
> thick throughout area of occurrence, Coalgate quad, Coal Co, OK in
> Arkoma basin. (Taft, 1901)
>
> **\*ca- Calvin Sandstone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: sandstone
>
> Minor: shale
>
> Incidental:
>
> **OKLAHOMA CITY-** Medium-grained, thin-bedded to massive sandstone
> and silty shale. Thickness ranges from 230 to about 440 feet.
>
> **FORT SMITH-** Shale and sandstone
>
> **ARDMORE-SHERMAN-** Sandstone, brown, medium-grained, with some gray
> shale; thickness, 40 to 320 feet, thinner southward.

**Comments:** Area of Coalgate quad, Coal and Hughes Cos, OK in Arkoma
basin and Chautauqua platform where unit is exposed in north-central and
western parts of quad. Composed of massive and thin-bedded sandstone
with some shaly beds in upper part, 140-240 ft thick. For nearly 140 ft
upward from base, is massive but not very hard sandstone. In southern
part of outcrop, lower sandy member becomes shaly, and even the massive
beds which occur are more friable than same deposits in northern part of
quad. Near middle of lower sandstone member, west of Sand Creek, there
is a shaly and slightly calcareous bed which contains hematite;
bright-red color of this bed upon weathering is a characterisitic
feature of unit. Upper part of unit is least shaly in northern part of
area, and many beds are hard and weather into slabs and hard plates.
Upper 90-100 ft here contains two, and in places more, shaly beds 10-20
ft thick. Sandstone beds of this upper portion decrease southwestward
from 40 ft to thin layers interstratified with shales. (Taft, 1901)

> **\*lb- Labette Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale
>
> Minor: sandstone, limestone
>
> Incidental:
>
> **TULSA-** Shale and thin sandstone and limestone.
>
> **Comments**: Range between 30 and 80 ft thick. Forms topographic
> depressions. Has a persistent, buff, fine-grained sandstone in upper
> part. Extends south from KS into OK as far as the latitude of Nowata,
> KS on the Chautauqua platform. (Ohern, 1910)
>
> **\*fs- Fort Scott Limestone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: limestone, shale
>
> Minor:
>
> Incidental:
>
> **TULSA-** Limestone and shale. (Mapped with the Labette Formation
> south of Bird Creek inTulsa County)
>
> **\*se- Senora Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: sandstone, shale
>
> Minor: limestone
>
> Incidental: coal
>
> **TULSA**- Shale with thin and lenticular sandstone, minor limestone,
> and
>
> coal.
>
> **OKLAHOMA CITY-** Mainly fine-grained micaceous sandstone and shale
> locally containing coal beds. Thickness ranges from about 500 to 950
> feet.
>
> **FORT SMITH**- Shale, sandstone, and thin coal seams.
>
> **ARDMORE-SHERMAN-** Shale, gray, and light-brown medium-grained
> sandstone; thickness, 150 to 500 feet, decreasing southwestward.
> Subdivided into lower sandstone, 350 feet thick, and upper shale, 150
> feet thick.
>
> **Comments**: Composed of interstratified sandstones and shaly beds
> nearly 500 ft thick in northeast part of Coalgate quad, Coal and
> Hughes Cos, OK, Arkoma basin and Chautauqua platform. Thickness
> decreases to southwest, chiefly by thinning of sandstone beds; at
> western edge of quad does not exceed 150 ft. In norther outcrop area,
> lower 320 ft of formation composed almost entirely of sandstone which
> forms a rugged, stony highland with sandstone bluffs, some 100 ft
> high, along eastern side. This sandstone grades upward through thin,
> sandy beds into shale strata about 160 ft thick. Near middle of quad,
> lower massive sandstone becomes divided and shale beds 20-75 ft thick
> appear. In western part of quad, sandstone beds become quite variable
> in thickness and in their position in the formation. Upper, and more
> shaly member is 100-120 ft thick in western part. In texture,
> sandstones are generally fine grained, and gray or reddish brown in
> color. Shales rarely well exposed. Bluish clay shales and brownish
> sandy shales belonging in upper part of series, however, are exposed
> in deeper cuttings of streams flowing from higher land of succeeding
> Calvin sandstone. (Taft, 1901)
>
> **\*st- Stuart Shale**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale
>
> Minor: sandstone
>
> Incidental:
>
> **OKLAHOMA CITY-** Mostly laminated clay shale and minor amounts of
> silty
>
> sandstone. Thickness ranges from 80 to 180 feet.
>
> **FORT SMITH-** Shale and minor sandstone
>
> **ARDMORE-SHERMAN-** Shale, blue to dark-gray, with some fine- to
> medium-grained brown sandstones; thickness, 80 to 300 feet, decreasing
> southwestward.
>
> **McALESTER TEXARKANA-** Shale, blue to dark-gray, with some fine- to
> medium-grained sandstones; top eroded; lower 20 feet exposed.
>
> **Comments:** Is 275 ft thick in northeast and central part of
> Coalgate quad, Coal Co, OK, Arkoma basin, and about 100 ft in western
> part. Composed of three \[informal\] members: upper and lower ones of
> shale, separated by a variable sandstone 10-50 ft thick. In central
> part of quad, a thin sandstone and chert conglomerate lentil occurs in
> lower shale member. This lower member has a nearly constant thickness
> of about 120 ft from northeast corner of quad southwestward to within
> 10 mi of quad border where it begins to contract; at western border
> does not exceed 50 ft. Composed chiefly of bluish and black laminated
> clays. Crops out in a level, rolling tract bordering the timber belt
> of underlying Thurman sandstone on east. Upper member is composed of
> bluish shales, 10-120 ft thick. Forms flattopped ridges and hills with
> eastward and southward-facing bluffs. To west gradually changes to
> thin shaly beds, and finally disappears. (Taft, 1901)
>
> **\*th- Thurman Sandstone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: sandstone
>
> Minor: shale, conglomerate
>
> Incidental:
>
> **OKLAHOMA CITY-** Mainly medium-grained, silty sandstone with cherty
> conglomerate at base. Only a few feet exposed in quadrangle.
>
> **FORT SMITH-** Sandstone and shale
>
> **ARDMORE-SHERMAN-** Sandstone, brown, fine- to coarse-grained, with
> some gray shale and basal 50-foot chert conglomerate; thickness, 80 to
> 250 feet, decreasing southwestward.
>
> **McALESTER TEXARKANA-** Sandstone, brown, fine- to coarse-grained,
> with some gray shale and a basal 50-foot chert conglomerate; grades
> northward into Boggy Formation; top eroded at many places; thickness,
> 200 feet.

**Comments:** First published use in Pittsburg Co, OK, Arkoma basin.
Probably named for the town of Thurman. No type locality designated.
Occurs in the McAlester coal district in the McAlester quadrangle, where
it has an exposure of about 200 ft. The lower part, 50+ ft thick, is a
conglomerate of angular or little rounded chert fragments in a brown
sandstone matrix. Brown sandstone and shaly beds occur above the
conglomerate. (Taft, 1899)

> **\*bo- Boggy Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor: limestone
>
> Incidental: coal
>
> **TULSA-** Shale, sandstone, and coal.
>
> **FORT SMITH-** Shale, sandstone, and coal; includes Bluejacket
> Sandstone Member at base
>
> **ARDMORE-SHERMAN-** Shale and sandstone, blue-gray to brown, fine- to
> coarse- grained, with some thin limestone lenses and a coal bed 2.5
> feet thick about 400 feet above base. Thickness, 1,250 to 2,800 feet.
> \"Bluejacket Sandstone,\" IPbj, at base, 8 to 12 feet thick, with
> 2-foot \"Secor coal\" 50 feet above top of Bluejacket. (Lower Franks
> Conglomerate)
>
> **McALESTER TEXARKANA-** Shale, brown, to blue-gray, illitic,
> chloritic, with many sandstones, fine- to coarse-grained, micaceous,
> quartzose, moderately to well-indurated, with \"Secor coal\" about 50
> feet above base; thickness, 2,140 to 4,000 feet, increasing eastward.
>
> **Comments**: First published use in central part of OK in Pittsburg
> Co, Arkoma basin. Probably named for North Boggy Creek. Occurs in the
> McAlester coal district in the McAlester quadrangle, and in the Lehigh
> coal district in the Atoka and Colgate quadrangles. In the McAlester
> coal district, consists generally of a mass of shale and sandstone
> nearly 3,000 ft thick; probably not less than sixteen beds of
> sandstone 20-150 ft thick, separated by shale 100-600 ft thick. Shales
> are bluish fissile clay containing ironstone concretions, thin wavy
> sandstone plates, and shaly sandstone strata; sandstones are generally
> brownish or gray, fine grained, and some beds are quite ferruginous.
> In the Lehigh coal district, rocks are practically the same in
> character as in the McAlester district; they are shales and sandy
> shales with many thin sandstones of practically the same quality,
> texture, and color. (Taft,1899)
>
> **\*bj- Bluejacket Sandstone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: sandstone
>
> Minor:
>
> Incidental: coal
>
> **ARDMORE-SHERMAN-** \"Bluejacket Sandstone,\" IPbj, sandstone, at
> base, of Boggy FM, 8 to 12 feet thick, with 2-foot \"Secor coal\" 50
> feet above top of Bluejacket.
>
> **McALESTER TEXARKANA**- Sandstone, tan, fine- to coarse-grained,
> micaceous, quartzose, moderately to well-indurated; erodes into a
> mappable escarpment; thickness, 12 to 266 feet, increasing eastward

**\*sa- Savanna Formation**

> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor: limestone
>
> Incidental: coal
>
> **TULSA-** \"Savanna Formation,\" shale and thin sandstone, limestone,
> and coal.
>
> **FORT SMITH**- IPsa \"Savanna Formation,\" shale, sandstone, and coal
>
> **ARDMORE-SHERMAN-** Sandstone and shale, gray to brown, fine- to
> coarse- grained, cherty, with several thin coal seams near middle;
> thickness, 1,120 to 1,600 feet (Lower Franks Conglomerate)
>
> **McALESTER TEXARKANA-** Shale, tan to brown, illitic, chloritic, and
> sandstone, fine-to coarse-grained, micaceous, quartzose, with several
> thin coal seams in middle, one of which is \"Cavanal coal;\"
> thickness, 1,470 to 2,000 feet, increasing eastward.
>
> **Comments:** First published use in Pittsburg Co, OK, in the Arkoma
> basin. Probably named for the town of Savanna. No type locality
> designated. Occurs in the McAlester coal district in the McAlester
> quadrangle, and in the Lehigh coal district in the Atoka and Colgate
> quadrangles. In the McAlester coal district, consists generally of a
> series of sandstones and shales about 1,150 ft thick; there are five
> principal sandstone beds with varying thicknesses from nearly 50 ft to
> 200 ft. These sandstones are brown or grayish-brown, fine grained, and
> compact, generally thin and in part shaly. In the Lehigh coal
> district, is similar to sandstones described in the McAlester coal
> district, but these sandstones become chert breccias throughout east
> side of the Lehigh Basin. (Taff, 1899)
>
> **\*m- McAlester Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor:
>
> Incidental: coal
>
> **ARDMORE-SHERMAN-** Shale, gray, with \"Upper Hartshorne coal\" 1 to
> 50 feet above base, 500 to 600 feet thick; overlain by dark-gray shale
> with many buff fine-grained sandstones, 595 to 1,030 feet thick;
> overlain by dark-gray shale, 300 to 925 feet thick, with \"McAlester
> coal,\" 1 to 3 feet thick, a few feet above base. Total thickness
> ranges from 1,150 to 2,420 feet. (Lower Franks Conglomerate)
>
> **McALESTER TEXARKANA-** Shale, gray, illitic, chloritic, with many
> tan to gray sandstones, fine- to coarse-grained, micaceous, quartzose;
> \"McAlester and Stigler coals\" 600 to 800 feet or more below top;
> thickness, 2,000 to 2,830 feet, increasing eastward

**Comments:** First published use in Pittsburg Co, OK, in the Arkoma
basin. Probably named for the town of McAlester. No type locality
designated. Occurs in the McAlester coal district in the McAlester
quadrangle, and in the Lehigh coal district in the Atoka and Colgate
quadrangles. In the McAlester coal district, consists of (ascending): 1)
800 ft of shale, with thin sandstone and coal, and Hartshorne or Grady
coal occurring near base of shale; 2) three to four beds of sandstone
separated by shale 100-200 ft thick, together this sandstone and shale
is 500 ft thick; and 3) 700 ft of shale with the McAlester coal about 50
ft above its base\--shale is blue, gray, or black with the gray color
predominant. In the Lehigh coal district, consists generally of cherty
sandstone beds and two workable coal beds. (Taff, 1899)

> **\*sm- Savanna and McAlester Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, sandstone
>
> Minor:
>
> Incidental: coal
>
> **FORT SMITH-** IPsm \"Savanna\" and \"McAlester Formations\"
> (undifferentiated; T. 15 N., Rs. 18, 19 E.), shale and minor
> sandstones
>
> **\*smh- Savanna + McAlester + Hartshorne Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale
>
> Minor: sandstone, limestone
>
> Incidental: coal
>
> **TULSA-** \"Savanna, McAlester, and Hartshorne Formations,\" shale
> and some sandstone, limestone, and coal
>
> **\*sma- Savanna + McAlester + Hartshorne + Atoka Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone, siltstone, limestone
>
> Minor:
>
> Incidental:coal
>
> **TULSA-** \"Savanna, McAlester, Hartshorne, and Atoka Formations,\"
> shale, sandstone, siltstone, limestone, and coal.
>
> **\*ha- Hartshorne Sandstone**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: sandstone
>
> Minor: shale
>
> Incidental: coal
>
> **ARDMORE-SHERMAN**- Sandstone, gray to white, medium- to
> coarse-grained with interbedded middle gray shale and \"Lower
> Hartshorne coal;\" thickness, 10 to 300 feet
>
> **McALESTER TEXARKANA-** Sandstone, tan to gray to white, fine- to
> coarse-grained, micaceous, quartzose, moderately to well-indurated,
> with some interbedded gray shale; \"Lower Hartshorne coal\" in middle
> and \"Upper Hartshorne coal\" at top; thickness, 100 to 350 feet,
> increasing eastward.
>
> **Comments**: First published use in Pittsburg Co, OK, in the Arkoma
> basin. Probably named for the town of Hartshorne. No type locality
> designated. Occurs in the McAlester coal district in the McAlester
> quadrangle, and in the Lehigh coal district in the Atoka and Colgate
> quadrangles. Is the oldest unit mapped. In the McAlester coal
> district, is a brown to light-gray sandstone 200 ft thick. Near the
> top, beds are very thick and some are massive, and occur as roughly
> rounded masses and thick ledges. In lower part, many of the beds are
> thin and slabby and associated with sandy shales. In the Lehigh
> district, occurs in the valley of North Boggy Creek; is a brownish
> fine sandstone which changes to a breccia of chert fragments in brown
> sandstone matrix. Lies below the Hartshorne coal and is separated from
> it by thin, variable bed of shale. (Taff, 1899)
>
> **\*mh- McAlester and Hartshorne Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, sandstone
>
> Minor:
>
> Incidental: coal
>
> **TULSA-** \"McAlester and Hartshorne Formations\", shale and some
> sandstone and coal.
>
> **FORT SMITH-** IPmh \"McAlester\" and \"Hartshorne Formations\"
> (undifferentiated), shale, sandstone, and coal.
>
> **\*at- Atoka Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Middle Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor: siltstone, limestone, conglomerate
>
> Incidental:
>
> **TULSA-** IPat \"Atoka Formation,\" shale, siltstone, sandstone, and
> thinlimestone.
>
> **FORT SMITH-** IPat \"Atoka Formation,\" shale and sandstone
>
> **ARDMORE-SHERMAN-** Shale, dark-gray, and sandstone, buff to white,
> fine- to coarse-grained, with some chert conglomerates; thickness, 800
> to 3,000 feet.
>
> **McALESTER TEXARKANA-** Shale, gray to tan, illitic, chloritic, with
> many sandstones, fine- to coarse-grained, quartzose, micaceous, well-
> to poorly sorted; \"Fanshawe\" and \"Red Oak Sandstones\" in middle
> and \"Spiro Sandstone\" at base; thickness, 3,000 to 10,000 feet,
> increasing southeastward in subsurface, south of growth faults.
>
> **Comments:** First published use in eastern Choctaw coal field, Le
> Flore, Latimer, Pittsburgh, and Atoka Cos, Arkoma basin and Ouachita
> tectonic belt province. Probably named for town of Atoka, Atoka Co,
> OK. No type locality designated. Crops out along south side of eastern
> Choctaw coal field, T5N, R17 to 27E. Consists of brown or light-gray,
> thin, slabby sandstone, separated by shaly layers which occasionally
> have ferruginous ironstone concretions. Is 6,000-7,000 ft thick.
> (Taff, 1900)
>
> **\*lm- Lynn Mountain Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian

Lithology:

> Major: shale, sandstone
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA**- Shale, gray to tan, with many fine- to
> coarse-grained, quartzose, micaceous sandstone with many bottom
> markings; top eroded; thickness, 3,000 to 7,000 feet or more;
> unconformable upon Goddard, Delaware Creek, Woodford, and older beds
> that are exposed north and west of Ti Valley Fault. Occurs in the
> OUACHITA MTNS
>
> **\*bh- Bloyd and Hale Formations**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: limestone, shale, sandstone
>
> Minor:
>
> Incidental:
>
> **TULSA-** \"Bloyd Formation,\" limestone and shale. \"Hale
> Formation,\" limestone and sandstone.
>
> **FORT SMITH-** IPbh \"Bloyd Formation,\" shale and limestone; and
> \"Hale Formation,\" limestone and sandstone.
>
> **\*u-Atoka, Bloyd and Hale Formations Undifferentiated**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian

Lithology:

> Major: shale, limestone, sandstone
>
> Minor:
>
> Incidental:
>
> **FORT SMITH-** IPu Undifferentiated. Atoka, Bloyd, and Hale
> Formations. IPat \"Atoka Formation,\" shale and sandstone, IPbh
> \"Bloyd Formation,\" shale and limestone; and \"Hale Formation,\"
> limestone and sandstone.
>
> **\*wa- Wapanucka Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian

Lithology:

> Major: limestone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Limestone, gray to tan, fine-grained to oolitic.
> Mapped separately along Lawrence uplift as IPwal, 30 to 75 feet thick
> with gray shale, IPwas, below, about 160 feet thick. Occurs in the
> ARBUCKLE MTNS
>
> **Comments**: Probably named for Wapanucka, in Johnston Co, OK. Crops
> out as narrow band along eastern border of the older Caney shale (new)
> in southeast and southwest corners of Coalgate quad, Coal Co, OK,
> Arkoma basin. Is extensive but thin lentil reaches beyond quad
> borders. Produces ridges, except where beds are overturned, allowing
> shale on both sides to erode, leaving limestone unprotected. Abrupt
> ending of unit at south end of Limestone Ridge due to displacement by
> an extensive fault. Southward at Boggy Depot, Atoka quad, Ouachita
> tectonic belt province, it emerges, bearing northwest and continuing
> to southwest corner Coalgate quad. Beds at top are white, massive,
> often oolitic. Cherty, sandy limestones and shales occur in central
> part. Below this is a massive white limestone (not constant in
> thickness, often missing). At base are calcareous and cherty
> sandstones which grade into shales on one hand, into nearly pure
> ferruginous sandstones of the other. In Limestone Ridge lowest strata
> are thin cherts and flint plates, interbedded with siliceous
> limestone. In vicinity of Wapanucka, S. Oklahoma folded belt province,
> sandstone beds occur at base. Whole unit thins westward. 200 ft thick
> at Limestone Ridge; 30 ft thick at west edge of quad. (Taff, 1901)
>
> **\*wal- Wapanucka Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: limestone
>
> Minor: shale
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Limestone, gray to tan, fine-grained to oolitic.
> Mapped separately along Lawrence uplift as **IPwal**, 30 to 75 feet
> thick with gray shale, IPwas, below, about 160 feet thick. Occurs in
> the ARBUCKLE MTNS
>
> **\*was- Wapanucka Formation**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: limestone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Limestone, gray to tan, fine-grained to oolitic.
> Mapped separately along Lawrence uplift as IPwal, 30 to 75 feet thick
> with gray shale, **IPwas**, below, about 160 feet thick. Occurs in the
> ARBUCKLE MTNS
>
> **\*wc- Wapanucka Formation and Chickachoc Chert**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: limestone, sandstone, shale
>
> Minor: chert
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, gray to brown, spicular, granular to
> oolitic; alternates with gray shale and calcareous sandstone;
> thickness, 270 to 720 feet. Chert content increases southeastward.
> Occurs in the OUACHITA MTNS
>
> **McALESTER TEXARKANA**- Limestone, gray to brown, oolitic to
> granular, with sponge-spicular chert in middle 50 to 114 feet with
> overlying and underlying calcareous sandstones and shales; thickness,
> 600 to 700 feet, pinching out in subsurface near Ti Valley Fault.
> Occurs in the OUACHITA MTNS, NORTH OF TI VALLEY FAULT.
>
> **Comments:** Chickachoc Chert: First used as a chert lentil in the
> lower part of Atoka formation. Area of report is Coalgate quad, Coal
> Co, OK, Arkoma basin, where Chickachoc occurs in southeast corner of
> quad. Is about 80 ft thick and composed of stratified, yet massive,
> calcareous and cherty sandstone. (Taft,1901)
>
> **\*lg- Limestone Gap**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA-** Shale and sandstone, gray to tan, illitic,
> chloritic, micaceous, quartzose, fine- to coarse-grained, moderately
> to well-indurated, with some ironstone concretions and many bottom
> marks; thickness, approximately 1,000 feet, pinching out in subsurface
> near Ti Valley Fault. Fault. Occurs in the OUACHITA MTNS NORTH OF TI
> VALLEY FAULT.
>
> **Comments**: Named as a formation of Springer group of Morrow series
> of the Bendian period. Type locality designated at Limestone Gap
> (source of name), sec 31, T2N, R13E, Atoka Co, OK in the Ouachita
> tectonic belt province. Occurs in the frontal Ouachitas, Ardmore
> basin, and Arbuckle Mountains; in the Ouachitas, is well exposed along
> Choctaw fault zone; in Ardmore basin, is well developed; in Arbuckle
> Mountains, areal distribution is exceedingly spotty and not traceable.
> Consists of gray-greenish, dark gray, and black bituminous shale with
> a profusion of siderite layers and concretions. In Ardmore basin,
> upper part ordinarily is predominantly silty and finely arenaceous;
> lower part contains in a few places thin arenaceous streaks, also
> contains scattered drab argillaceous limestone concretions with many
> fine plant fragments. Thickness is 1,250 ft about 5 mi east of the
> village of Springer, in a tributary of Cool Creek, along railroad
> track near center of SE1/4 sec 1, T3S, R2E, Carter Co, OK; thickness
> at type locality is 44 ft. (Harlton, 1938)

**\*ul- Union Valley Formation with limestone**

> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian

Lithology:

> Major: limestone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, gray, fine- to medium-grained,
> **IPul**, 12 to 25 feet thick; with sandstone, IPus, below, fine- to
> medium-grained, about 150 to 260 feet thick. Occurs in the ARBUCKLE
> MTNS
>
> **Comments**: Revised as basal formation of Springer group of Morrow
> series of the Bendian period. Formerly called Union Valley sandstone.
> Is a very widespread deposit and sandstones in most areas make up
> ridges of moderate relief. Found in east-central OK immediately south
> of Choctaw fault from vicinity of Limestone Gap to AR State line.
> \"Typical exposure\" is in the Ouachita Mountains in sec 36, T1S,
> R12E, Atoka Co; here it consists of gray to dark-gray shale and
> intercalated massive and thin-bedded greenish-yellow, limonitic, fine
> to medium subangular sandstone. Commonly casehardened by silica.
> Thickness is uniform and about 360 ftat most places in the Ouachita
> Mountains. Includes Stapp, conglomerate member (new) at base.
> (Harlton, 1938)

**\*us- Union Valley Formation with sandstone**

> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: limestone, sandstone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, gray, fine- to medium-grained, IPul,
> 12 to 25 feet thick; with sandstone, **IPus**, below, fine- to
> medium-grained, about 150 to 260 feet thick. Occurs in the ARBUCKLE
> MTNS
>
> **\*jv- Johns Valley Formation or Johns Valley Shale**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: shale
>
> Minor: conglomerate, limestone
>
> Incidental:
>
> **ARDMORE-SHERMAN-** \"Johns Valley Formation\"- Shale, dark-gray,
> with boulder conglomerate; thickness, 425 to 900 feet. Occurs in the
> OUACHITA MNTS
>
> **McALESTER TEXARKANA**- \"Johns Valley Shale\"- Shale, dark-gray,
> with some stringers of Wapanucka-like limestone in northwestern part
> of area; contains exotic boulders of southern Arbuckle Mountain
> facies, ranging from Fort Sill to Goddard and as large as 369 feet in
> diameter; some Wapanucka nodules are not exotic but were formed in
> place; thickness, 300 to 1,000 feet. Occurs in the OUACHITA MTNS SOUTH
> OF TI VALLEY FAULT.

**\*jf- Jackfork Group or Jackfork Sandstone**

> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: sandstone
>
> Minor: shale, conglomerate
>
> Incidental:
>
> **ARDMORE-SHERMAN-** \"Jackfork Sandstone\"- Sandstone, gray, white,
> and tan, coarse-grained, cherty, with gray shale and some boulders up
> to 7 feet in diameter; thickness 1,150 to 5,000 feet Occurs in the
> OUACHITA MNTS
>
> **McALESTER TEXARKANA-** \"Jackfork Group\"- Sandstone, tan to gray,
> fine- to coarse-grained, quartzose, with some mica, poorly to
> well-indurated, quartzitic has some gray shale and several maroon
> shales; black, white-speckled \"Chickasaw Creek Chert\" is at base;
> thickness, 1,500 to 6,000 feet or more.
>
> Occurs in the OUACHITA MTNS SOUTH OF TI VALLEY FAULT
>
> **Comments:** Raised in rank to group\--upper of two groups of the
> Pushmataha series (new) of the Bendian period. Is found in the
> Ouachita Mountains of OK in the Ouachita tectonic belt province. Best
> exposure in undisturbed sequence is in Prairie Mountain, T1S, R12E,
> Atoka Co, OK. This typically clastic deposit is divided into four
> newly named formations (ascending order); Wildhorse Mountain
> formation, Prairie Mountain formation, Markham Mill formation, and
> Wesley shale. ( Harlton, 1938) Named for Jackfork Mountain, Pittsburg
> and Pushmataha Cos, OK. No type locality designated. Occurs in
> northeastern part of Atoka quad and to the east is the mountain-making
> formation of the Ouachita Range. Consists of a series of
> even-textured, fine-grained, brown and gray sandstone strata ranging
> from thin layers to massive beds 50 ft thick. Occasionally
> interstratified are thin beds of clay shale and shaly sandstone. Total
> thickness is 3,800 ft in Atoka quad.(Taft, 1902) Typical greywacke.
>
> **\*mo- Morrowan rocks undifferentiated**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Early Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale and sandstone, gray to brown, fine- to
> coarse- grained; estimated thickness, 3,000 feet Occurs in the
> OUACHITA MNTS
>
> **\*ma- Morrowan-Atokan (?) rocks undifferentiated**
>
> Series: Pennsylvanian
>
> Maximum Age: Early Pennsylvanian
>
> Minimum Age: Middle Pennsylvanian
>
> Lithology:
>
> Major: shale, sandstone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale and sandstone, gray to brown, fine- to
> coarse-grained; thickness, 5,000 to 9,000 feet. Occurs in the OUACHITA
> MNTS

## Mp- Pitkin + Fayetteville + Hindsville + Moorefield Formations 

> Series: Mississippian
>
> Maximum Age: Late Mississippian
>
> Minimum Age: Late Mississippian
>
> Lithology:
>
> Major: limestone, shale
>
> Minor:
>
> Incidental:
>
> **FORT SMITH-** Mp \"Pitkin Formation,\" limestone; \"Fayetteville
> Formation,\" shale and limestone; \"Hindsville Formation,\" limestone
> and shale; and \"Moorefield Formation,\" limestone.

## Mpfh- Pitkin + Fayetteville + Batesville + Hindsville + Moorefield Formations 

> Series: Mississippian
>
> Maximum Age: Late Mississippian
>
> Minimum Age: Late Mississippian

Lithology:

> Major: limestone, shale
>
> Minor: sandstone, siltstone
>
> Incidental:
>
> **TULSA-** \"Pitkin Formation,\" limestone. \"Fayetteville
> Formation,\" shale and thin limestone \"Batesville Formation,\"
> fine-grained sandstone \"Hindsville Formation,\" limestone and shale
> \"Moorefield Formation,\" limestone, shale, and siltstone.

## Mg- Goddard Shale 

> Series: Mississippian
>
> Maximum Age: Late Mississippian
>
> Minimum Age: Late Mississippian
>
> Lithology:
>
> Major: shale
>
> Minor: sandstone
>
> Incidental:
>
> **ARDMORE-SHERMAN-** **1**. Mainly shale, gray, limonitic; thickness,
> 3,600 feet in Ardmore Basin, 240-450 feet on Lawrence uplift. In
> places includes \"Rod Club\" and \"Overbrook Sandstones\" and \"Union
> Valley Formation-Wapanucka\" shale. Occurs in the ARBUCKLE MTNS
>
> **2.** Shale, gray, limonitic; estimated thickness, 500 feet, but may
> be 2,500 Occurs in the OUACHITA MNTS
>
> **McALESTER TEXARKANA**- Shale, gray to black, with some sandstones
> and ironstone concretions; thickness, 500 feet or more. Occurs in the
> OUACHITA MTNS NORTH OF TI VALLEY FAULT
>
> **Comments**: Type locality listed as on Goddard ranch in secs 17, 18,
> 19, and 20, T3S, R4E, Johnston Co, OK in S. Oklahoma folded belt
> province. In measured type section, lower part 1,189 ft thick is gray
> to black shale with limonitic concretions with pelecypods and
> ammonoids, and upper part 1,671 ft thick is mostly a covered
> interval\--gray shale with ferruginous concretions. (Elias, 1956)
>
> **Md- Delaware Creek Shale**
>
> Series: Mississippian
>
> Maximum Age: Early Mississippian
>
> Minimum Age: Late Mississippian
>
> Lithology:
>
> Major: shale
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** **1**. Shale, dark-gray to black, fissile,
> calcareous; thickness, 160 to 750 feet, decreasing northward. Occurs
> in the ARBUCKLE MTNS
>
> **2**. Shale, dark-gray to black fissile; thickness 525 feet. Occurs
> in the OUACHITA MTNS
>
> **McALESTER TEXARKANA**- Shale, black, laminated, with limestone,
> siderite, and phosphatic concretions, and with greenish-gray silty
> glauconitic shale at base; thickness, approximately 500 feet. Occurs
> in the OUACHITA MTNS NORTH OF TI VALLEY FAULT.
>
> **Comments:** Named as middle member (of 3) of Caney shale; named from
> Delaware Creek which flows eastward in the Bromide-Wapanucka area.
> Type are designated in the northeast part of T2S, R7E, about 3 1/2 mi
> southwest of Bromide; type locality measured in NE1/4 sec 14, T2S,
> R7E, Johnston Co, OK, S. Oklahoma folded beld province. Occurs in
> northern Arbuckle Mountains of south-central OK. Consists of gray to
> dark-gray, non-calcareous to slightly calcareous, finely laminated to
> flaky, partly bituminous shale, locally rotten (shattered) with a
> considerable amount of finely crystalline gypsum along bedding planes.
> Gray to light-gray to light-buff limestone concretions common;
> concretions are generally fairly large and elliptical, more or less
> compressed across bedding plane, and commonly very large, up to 12 ft
> in diameter; they developed in fused clusters along bedding planes;
> some have crystalline barite. Calcareous concretions mostly distinctly
> septarian in structure. Thickness at type is about 270 ft; thickness
> southeast of Ahlosa is 150 +- 50 ft; thickness in area southwest of
> Bromide ranges from about 50 ft in west part of sec 13, T2S, R7E, to
> about 270 ft. (Elias, 1956)
>
> **Msw- Sycamore and Welden Limestones**
>
> Series: Mississippian
>
> Maximum Age: Early Mississippian
>
> Minimum Age: Late Mississippian
>
> Lithology:
>
> Major: limestone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, blue-gray to tan, silty, fine-grained;
> thickness, 2 to 370 feet, decreasing northeastward. Mapped separately
> in northeastern Arbuckle Mountains and Mannsville anticline; mapped
> elsewhere with underlying Woodford Shale. Occurs in the ARBUCKLE MTNS
>
> **Mst- Stanley Group or Stanley Shale**
>
> Series: Mississippian
>
> Maximum Age: Early Mississippian
>
> Minimum Age: Late Mississippian

Lithology:

> Major: shale, sandstone
>
> Minor: chert
>
> Incidental: tuff
>
> **ARDMORE-SHERMAN**- \"Stanley Shale\"- Shale, dark-gray, siliceous,
> with some gray to buff fine-grained sandstones; thickness,10,000 feet
> Occurs in the OUACHITA MNTS
>
> **McALESTER TEXARKANA-** \"Stanley Group\"- Shale, olive-green to
> gray, illitic, chloritic, with many5- to 30-foot-thick beds of poorly
> sorted, micaceous, quartzose sandstones and some thin siliceous cherty
> beds and black shales; several tuff beds occur in basal 1,000 feet and
> are indicated by red line in Stanley exposures as designated on map;
> many asphaltite, lead, and quartz veins occur along fault zones;
> mostly Chesterian age; thickness, 7,500 to 14,000 feet or more. Occurs
> in the OUACHITA MTNS SOUTH OF TI VALLEY FAULT

**Comments:** Is found in the Ouachita Mountains of OK in the Ouachita
tectonic belt province. Stanley shale is a sedimentary rock of typical
geosynclinal facies. Stanley includes four siliceous shale members
(ascending): Basal Ten Mile Creek, Tuskahoma, Middle Ten Mile Creek, and
Moyers. (Goldstein, 1953)

> **Mkr- Keokuk and Reeds Spring Formations and St. Joe Group**
>
> Series: Mississippian
>
> Maximum Age: Early Mississippian
>
> Minimum Age: Early Mississippian

Lithology:

> Major: chert, limestone
>
> Minor: shale, marlstone
>
> Incidental:
>
> **TULSA-** \"Keokuk Formation,\" chert and limestone. \"Reeds Spring
> Formation,\" chert and limestone. \"St. Joe Group,\" limestone and
> shale.
>
> **FORT SMITH-** Mkr \"Keokuk Formation,\" chert; \"Reeds Spring
> Formation,\" chert and limestone; and \"St. Joe \'Group,\'\" limestone
> and marlstone.
>
> **Mu- Mississippian Rocks** **above Chattanooga Shale
> Undifferentiated**
>
> Series: Mississippian
>
> Maximum Age: Early Mississippian
>
> Minimum Age: Late Mississippian
>
> Lithology:
>
> Major: limestone, shale, chert
>
> Minor: marlstone
>
> Incidental:
>
> **FORT SMITH**- Mu- Undifferentiated Mississippian Rocks above
> Chattanooga Shale. Includes: Pitkin, Fayetteville, Hindsville,
> Moorefield, Keokuk and Reeds Spring Formations, and St. Joe Group.
>
> **MDw- Woodford Shale**
>
> Series: Mississippian to Dovonian
>
> Maximum Age: Late Dovonian
>
> Minimum Age: Early Mississippian

Lithology:

> Major: shale, chert
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA-** Shale and chert, black, fissile, with
> phosphatic nodules and some greenish-gray silty shale; at base is
> reddish-brown shale; rests on Pine Top Chert in Northeast quarter of
> section 5 of Township 2 North, Range 15 East; thickness, 67 feet at
> Pine Top. Occurs in the OUACHITA MTNS NORTH OF TI VALLEY FAULT.
>
> **Comments:** First published use in Atoka quad, Johnston and Atoka
> Cos, OK, South Oklahoma folded belt and Ouachita tectonic belt
> provinces. Probably named for town of Woodford, Carter Co, OK. No type
> locality designated. Exposed in northwestern part of Atoka quad. Forms
> low ridges and hills, Composed of thin strata of dark chert, cherty
> shale, and black, fissile, bituminous shale aggregating 500-700 ft in
> thickness. Is variable as to thickness and position of beds. Locally,
> chert makes up large part of the formation; elsewhere it is largely
> siliceous black shale. Concretions of flint found near base. Some
> cherty beds approach siliceous limestone. (Taft, 1902)

MDSO- Undifferentiated, Mississisippian, Devonian, Silurian, and
Ordovician Rocks

> Series: Mississippian to Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Late Mississippian

Lithology:

> Major: limestone, shale, sandstone
>
> Minor: dolomite, chert
>
> Incidental:
>
> **FORT SMITH-** Mississisippian, Devonian, Silurian, and Ordovician
> Rocks, Undifferentiated. Mississippian and Devonian. \"Chattanooga
> Shale,\" shale. Devonian. \"Sallisaw Formation,\" limestone,
> sandstone, and chert; and \"Frisco Formation,\" limestone. Silurian.
> \"Quarry Mountain Formation,\" limestone; \"Tenkiller Formation,\"
> limestone; and \"Blackgum Formation,\" limestone and dolomite.
> Ordovician. \"Sylvan Shale,\" shale; \"Fernvale Limestone,\"
> limestone; \"Fite Limestone,\" limestone; \"Tyner Formation,\" shale,
> sandstone, dolomite, and limestone; \"Burgen Sandstone,\" sandstone
> and minor shales and limestones; and \"Cotter Dolomite,\" dolomite.

## MDO- Chattanooga + Fernvale + Fite + Tyner + Burgen + Cotter Formations

> Series: Mississippian to Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Late Mississippian

Lithology:

> Major: shale, limestone, dolomite, sandstone
>
> Minor:
>
> Incidental:
>
> **TULSA-** \"Chattanooga Formation,\" shale and minor sandstone.
> \"Fernvale Formation,\" limestone. \"Fite Formation,\" limestone
> \"Tyner Formation,\" shale and dolomite \"Burgen Sandstone,\"
> sandstone and minor dolomite and shale. \"Cotter Formation,\" dolomite
> and minor sandstone.
>
> **MDSa- Arkansas Novaculite**
>
> Series: Mississippian to Silurian
>
> Maximum Age: Early Silurian
>
> Minimum Age: Early Mississippian

Lithology:

> Major: novaculite (chert), shale
>
> Minor: conglomerate
>
> Incidental:
>
> **McALESTER TEXARKANA**- Chert, fine- to very fine-grained, gray,
> green, tan, black, white, and pink, with interbedded black to gray
> shale in 1-to 18-inch beds; some interbedded conglomerates and in
> places a basal conglomerate; upper part has been determined to be
> Mississippian in age and lower part to be Early Silurian, on basis of
> examination of palynomorphs from Potato Hills; thickness, 600 feet or
> more. Occurs in the OUACHITA MTNS SOUTH OF TI VALLEY FAULT.
>
> **Comments**: novaculite refers to a dense cryptocrystalline siliceous
> sediment similar to chert but characterized by dominance of
> microcrystalline quartz over chalcedony-distinquished by polygonal
> triple-point texture.

#### Da- Arkansas Novaculite

> Series: Dovonian
>
> Maximum Age: Late Dovonian
>
> Minimum Age: Late Dovonian
>
> Lithology:
>
> Major: shale, novaculite
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale, black, cherty, with much novaculite;
> thickness, 230 to375 feet. Occurs in the OUACHITA MNTS
>
> **Comments**: novaculite refers to a dense cryptocrystalline siliceous
> sediment similar to chert but characterized by dominance of
> microcrystalline quartz over chalcedony-distinquished by polygonal
> triple-point texture.

## Dw- Woodford Shale 

> Series: Dovonian
>
> Maximum Age: Late Dovonian
>
> Minimum Age: Late Dovonian

Lithology:

> Major: black shale
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale, black, fissile, cherty; thickness, 160 to
> 560 feet, increasing southward. Occurs in the ARBUCKLE MTNS
>
> **Comments**: First published use in Atoka quad, Johnston and Atoka
> Cos, OK, South Oklahoma folded belt and Ouachita tectonic belt
> provinces. Intent to name not stated; probably named for town of
> Woodford, Carter Co, OK. No type locality designated. Exposed in
> northwestern part of Atoka quad. Forms low ridges and hills, Composed
> of thin strata of dark chert, cherty shale, and black, fissile,
> bituminous shale aggregating 500-700 ft in thickness. Is variable as
> to thickness and position of beds. Locally, chert makes up large part
> of the formation; elsewhere it is largely siliceous black shale.
> Concretions of flint found near base. Some cherty beds approach
> siliceous limestone. (Taff, 1902)
>
> **Dp- Pine Top Chert**
>
> Series: Dovonian
>
> Maximum Age: Early Dovonian
>
> Minimum Age: Early Dovonian
>
> Lithology:
>
> Major: limestone, chert
>
> Minor: conglomerate
>
> Incidental:
>
> **McALESTER TEXARKANA-** Limestone, chert, and cherty limestone, gray
> to light-gray to tan to white and pink; contains Haragan brachiopods;
> at top is an 8-foot chert conglomerate; base not exposed; thickness,
> 60 feet. Occurs in the OUACHITA MTNS NORTH OF TI VALLEY FAULT
>
> **DSh- Hunton Group**
>
> Series: Dovonian to Silurian
>
> Maximum Age: Early Silurian
>
> Minimum Age: Early Dovonian
>
> Lithology:
>
> Major: marlstone, shale, limestone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Marlstone, shale, and limestone, buff, ranging in
> age from Early Silurian to Early Devonian; thickness, 100 to 700 feet,
> with many unconformities Occurs in the ARBUCKLE MTNS
>
> **Comment**: Named for village of Hunton, Johnston Co, OK in the South
> Oklahoma folded belt province. No type locality designated. Occurs in
> northwestern part of Atoka quad where it is 150 ft thick, and to west
> in Arbuckle uplift where it reaches 300-ft thickness. Forms sharp
> ridges and terraced hills. Is nearly pure limestone and limy marls. At
> base are variable beds of white oolite followed by bluish and
> cream-colored granular and fine-textured limestones and marly beds.
> Some beds are hard and crystalline, some composed largely of shell
> fragments. Near top are marly beds containing abundant fossils.
> Uppermost 50 ft is hard and thin-bedded, with chert concretions and
> fossils. (Taff, 1902) Named (Taff, 1902). Revised as group; divided
> into formations (ascending): Chimneyhill Limestone, Henryhouse Shale,
> Haragan Shale, and Bois d\'Arc Limestone (Reeds, 1911). Divided into
> Keel, Cochrane, and Clarita Formations of Chimneyhill Subgroup
> (Amsden, 1967).

## Sm- Missouri Mountain Shale 

> Series: Silurian
>
> Maximum Age: Early Silurian
>
> Minimum Age: Early Silurian
>
> Lithology:
>
> Major: shale, phyllite
>
> Minor: sandstone, conglomerate
>
> Incidental: limestone
>
> **McALESTER TEXARKANA-** Shale, greenish-gray to maroon to black;
> grades into phyllite in Broken Bow Uplift; contains some thin
> sandstones and gray conglomerates; a fossiliferous limestone occurs in
> Southeast quarter section 29, Township 4 South, Range 23 East; mapped
> as SmOp in Potato Hills, where it is included with Polk Creek Shale;
> thickness, 60 to 110 feet or less. Occurs in POTATO HILLS, BROKEN BOW
> UPLIFT or ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF OUACHITA
> MOUNTAINS
>
> **Sb- Blaylock Sandstone**
>
> Series: Silurian
>
> Maximum Age: Early Silurian
>
> Minimum Age: Early Silurian
>
> Lithology:
>
> Major: sandstone, shale, phyllite
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA-** Sandstone, greenish-gray, fine grained, well
> indurated, alternating with dark-gray to brown phyllites and shales in
> lower 100 feet; occurs only in Broken Bow Uplift and adjacent area;
> thickness, 670 to 804 feet, with maximum thickness in Arkansas 1,500
> feet. Occurs in POTATO HILLS, BROKEN BOW UPLIFT or ADJACENT SMALLER
> UPLIFTS IN SOUTHEASTERN PART OF OUACHITA MOUNTAINS

## Smb- Missouri Mountain Shale and Blaylock Sandstone 

> Series: Silurian
>
> Maximum Age: Early Silurian
>
> Minimum Age: Early Silurian
>
> Lithology:
>
> Major: shale
>
> Minor:
>
> Incidental: sandstone
>
> **ARDMORE-SHERMAN-** \"Missouri Mountain Shale,\" shale, black to
> gray-green to red; thickness, 100 feet; underlain by sandstone,
> several feet thick, correlated as \"Blaylock.\" Occurs in the OUACHITA
> MNTS

**SmOp- Missouri Mountain and Polk Creek Shales**

> Series: Silurian to Ordovician
>
> Maximum Age: Late Ordovician
>
> Minimum Age: Early Silurian
>
> Lithology:
>
> Major: shale, phyllite
>
> Minor: sandstone, conglomerate
>
> Incidental: limestone
>
> **McALESTER TEXARKANA-** Shale, greenish-gray to maroon to black;
> grades into phyllite in Broken Bow Uplift; contains some thin
> sandstones and gray conglomerates; a fossiliferous limestone occurs in
> Southeast quarter section 29, Township 4 South, Range 23 East; mapped
> as **SmOp** in Potato Hills, where it is included with Polk Creek
> Shale; thickness, 60 to 110 feet or less. Occurs in POTATO HILLS,
> BROKEN BOW UPLIFT or ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF
>
> OUACHITA MOUNTAINS

## Op- Polk Creek Shale 

> Series: Ordovician
>
> Maximum Age: Late Ordovician
>
> Minimum Age: Late Ordovician
>
> Lithology:
>
> Major: black shale, phyllite
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Shale, black; thickness, 175 feet. Occurs in the
> OUACHITA MNTS

## McALESTER TEXARKANA- Shale and phyllite, dark-gray to black, with some chert nodules; contains many graptolites; thickness, 75 to 140 feet. (Same as Sylvan Shale in Arbuckle Mountains.) Occurs in POTATO HILLS, BROKEN BOW UPLIFT or ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF OUACHITA MOUNTAINS

## Obf- Bigfork Chert

> Series: Ordovician
>
> Maximum Age: Middle Ordovician
>
> Minimum Age: Middle Ordovician

Lithology:

> Major: chert, limestone, shale
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, gray, and dark-gray to black chert;
> thickness, 575 feet. Occurs in the OUACHITA MNTS
>
> **McALESTER TEXARKANA**- Chert, dark-gray to black, with interbedded
> graptolitic black shales and fossiliferous gray to black cherty
> limestones; contains asphaltite seams; erodes into a mappable
> escarpment; thickness, 600 to 800 feet. (Same as Viola Limestone in
> Arbuckle Mountains.) Occurs in POTATO HILLS, BROKEN BOW UPLIFT or
> ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF OUACHITA MOUNTAINS
>
> **Comments**: Unit is found in many parts of Ouachita Range. Consists
> of close textured, even-bedded, brittle, dark-gray chert in layers 1
> to 18 inches thick. Weathered parts look like sandstone. Is about 700
> ft thick. Has been mapped as novaculite but it is not novaculite.
> (Purdue, 1909)

**Ow- Womble Formation or Womble Shale**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Middle Ordovician
>
> Lithology:
>
> Major: sandstone, phyllite, shale
>
> Minor: limestone,
>
> Incidental:
>
> **ARDMORE-SHERMAN-** \"Womble Shale\"- Shale, black to green;
> thickness, 250 feet, base covered. Occurs in the OUACHITA MNTS
>
> **McALESTER TEXARKANA-** \"Womble Formation\"- Sandstone, phyllites,
> and shales, greenish-gray to dark-gray to black, weathering red-brown;
> some black to brown cherty limestones occur in upper part; Middle
> Ordovician graptolites are found in upper part, and Lower Ordovician
> graptolites in lower part; basal part faulted; estimated thickness,
> 1,000 feet or more, with maximum thickness in Arkansas 3,500 feet.
> Occurs in POTATO HILLS, BROKEN BOW UPLIFT or ADJACENT SMALLER UPLIFTS
> IN SOUTHEASTERN PART OF OUACHITA MOUNTAINS
>
> **Ovb- Viola Limestone and Bromide Formation**
>
> Series: Ordovician
>
> Maximum Age: Late Ordovician
>
> Minimum Age: Late Ordovician
>
> Lithology:
>
> Major: limestone, shale, sandstone
>
> Minor:
>
> Incidental:
>
> **CLINTON-** Limestone, limestone and shale interbedded, and
> sandstone; thickness, about 900 feet; one outlier is shown in southern
> part of quadrangle. Simpson and lower units are covered.
>
> **LAWTON**- Limestone, interbedded limestone and shale, and sandstone;
> thickness about 900 feet (270 m), faulted in isolated areas, top
> eroded, base covered.

**Osfv- Sylvan Shale + Fernvale Limestone and Viola Limestone**

> Series: Ordovician
>
> Maximum Age: Middle Ordovician
>
> Minimum Age: Late Ordovician
>
> Lithology:
>
> Major: limestone, shale
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** \"Sylvan,\" shale, dark-greenish-gray; thickness,
> 60 to 325 feet. \"Fernvale\" and \"Viola,\" limestone, gray, fine- to
> coarse-grained; thickness, 350 to 900 feet. Occurs in the ARBUCKLE
> MTNS

**Obm- Bromide + Tulip Creek and McLish Formations**

> Series: Ordovician
>
> Maximum Age: Middle Ordovician
>
> Minimum Age: Middle Ordovician
>
> Lithology:
>
> Minor:
>
> Incidental:
>
> Major: limestone, shale, sandstone
>
> **ARDMORE-SHERMAN-** Limestone, buff; shale, grayish-green; and
> sandstone, brown to white, fine- to medium-grained: approximate
> sequence of rocks in each formation, from top to bottom. Thickness,
> 750 to 1,400 feet, thinning eastward. (Simpson Group) Occurs in the
> ARBUCKLE MTNS

**Ooj- Oil Creek and Joins Formation**

> Series: Ordovician
>
> Maximum Age: Middle Ordovician
>
> Minimum Age: Middle Ordovician
>
> Lithology:
>
> Major: limestone, shale, sandstone
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, gray to tan, granular, with
> greenish-gray shale and brown fine- to medium-grained sandstone;
> thickness, 600 to 1,100 feet, decreasing eastward. (Simpson Group)
> Occurs in the ARBUCKLE MTNS

**Ows- West Spring Creek Formation**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician

Lithology:

> Major: limestone, dolomite
>
> Minor: sandstone, shale
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Limestone, gray to tan, fine-grained, gradational
> eastward into tan fine- to coarse-grained dolomite; some tan to gray
> sandstone and shale; thickness, 1,875 to 3,000 feet, decreasing
> eastward. (Arbuckle Group) Individual Fm description not found Occurs
> in the ARBUCKLE MTNS

**Oua- Upper part of Arbuckle Group**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: limestone, dolomite
>
> Minor: clay
>
> Incidental:
>
> **LAWTON-** Predominantly limestone and dolomite, 4,000 feet (1,200 m)
> thick, faulted in isolated areas. \"Upper part of Arbuckle Group
> undifferentiated,\" Oua, faulted in isolated areas north of Lawton.
>
> **Comments:** Arbuckle Group: Named for Arbuckle Mountains, Murray Co,
> OK, South Oklahoma folded belt province. Consists of limestones with
> dolomites. At base, 50 ft thin-bedded siliceous limestones gradually
> change to 300-400 ft massive, dull-bluish and cream dolomites; above
> these 200 ft of thin-bedded, granular limestone and compact blue
> limestones which grade into 3500-4000 ft massive magnesium limestone
> with chert in lower half. At top are limestones interstratified with
> sandy beds and strata of red, yellow and green clays (Taff, 1903).

**Ok- Kindblade Formation**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: limestone, dolomite
>
> Minor: sandstone, shale
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Limestone, gray to tan, fine-grained, gradational
> eastward into tan fine- to coarse-grained dolomite; some tan to gray
> sandstone and shale; thickness, 1,875 to 3,000 feet, decreasing
> eastward. (Arbuckle Group) Individual Fm description not found. Occurs
> in the ARBUCKLE MTNS

**Owk- West Spring Creek and Kindblade Formations**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician

Lithology:

> Major: dolomite, sandstone, conglomerate, limestone,
>
> Minor:
>
> Incidental:
>
> **LAWTON-** \"West Spring Creek Formation\" and \"Kindblade
> Formation,\" Owk, dolomite, dolomitic sandstone, conglomerate, and
> limestone; thickness, approximately 2,000 feet (600 m). (Upper part of
> Arbuckle Group)
>
> **ARDMORE-SHERMAN-** Limestone, gray to tan, fine-grained, gradational
> eastward into tan fine- to coarse-grained dolomite; some tan to gray
> sandstone and shale; thickness, 1,875 to 3,000 feet, decreasing
> eastward. (Arbuckle Group) Individual Fm description not found. Occurs
> in the ARBUCKLE MTNS

**Ocm- Cool Creek and McKenzie Hill Formations**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: limestone, dolomite, sandstone, conglomerate
>
> Minor:
>
> Incidental:
>
> **LAWTON-** \"Cool Creek Formation\" and \"McKenzie Hill Formation,\"
> Ocm, limestone and conglomerate with abundant quartz sand and cherty
> zones; thickness, approximately 2,000 feet (600 m). (Upper part of
> Arbuckle Group)
>
> **ARDMORE-SHERMAN-** Limestone, gray to tan, fine-grained, cherty,
> gradational eastward into dolomites and sandstones; thickness, 1,500
> to 2,300 feet, decreasing eastward. (Arbuckle Group) Occurs in the
> ARBUCKLE MTNS

**Ob- Blakely Sandstone**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: sandstone
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA-** Sandstone, gray to brown, fine- to
> coarse-grained, quartzose, micaceous; grades into beds above, with
> sharp quartzitic contact below; thickness, 10 to 15 feet, with maximum
> thickness in Arkansas 400 feet. Occurs in POTATO HILLS, BROKEN BOW
> UPLIFT or ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF OUACHITA
> MOUNTAINS

**Om- Mazarn Shale**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: shale, phyllite
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA-** Shale and phyllite, dark-gray to black,
> micaceous; estimated thickness, 1,000 feet, with maximum thickness in
> Arkansas 3,000 feet. Occurs in POTATO HILLS, BROKEN BOW UPLIFT or
> ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF OUACHITA MOUNTAINS

**Ocs- Crystal Mountain Sandstone**

> Series: Ordovician
>
> Maximum Age: Early Ordovician
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: sandstone
>
> Minor:
>
> Incidental: conglomerate
>
> **McALESTER TEXARKANA-** Sandstone, pink to light-gray to dark-gray,
> fine- to coarse-grained, quartzose, with well-rounded, frosted grains,
> quartzitic, fractured in many places, with many quartz and orthoclase
> veins; 14-foot chert- and limestone-pebble conglomerate occurs at
> base; thickness, 500 feet or more, with maximum thickness in Arkansas
> 850 feet (called Lower Cool Creek in Arbuckle Mountains and Roubidoux
> Sandstone in Ozarks). Occurs in POTATO HILLS, BROKEN BOW UPLIFT or
> ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF OUACHITA MOUNTAINS

**Oc- Collier Shale**

> Series: Ordovician to Cambrian
>
> Maximum Age: Late Cambrian
>
> Minimum Age: Early Ordovician
>
> Lithology:
>
> Major: shale, phyllite, limestone
>
> Minor:
>
> Incidental: conglomerate
>
> **McALESTER TEXARKANA-** Shale and phyllite, dark-gray to black, with
> much limestone, some granitic and arkosic pebbles, many quartz and
> orthoclase pegmatities, and some galena and sphalerite; contains Lower
> Ordovician conodonts; base covered; exposed thickness, 200 feet.
> Viersen and Cochran\'s 25-1 Weyerhaeuser well (9-8-70), spudded in
> upper Collier to total depth of 10,019 feet in Southeast quarter of
> Northwest quarter of section 25, Township 5 South, Range 23 East,
> penetrated dark-gray to black phyllites, quartzites, and dolomitic
> marble without reaching basement (Goldstein, 1975). Occurs in POTATO
> HILLS, BROKEN BOW UPLIFT or ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN
> PART OF OUACHITA MOUNTAINS
>
> **Comments**: Is the oldest known formation in the Wichita Mountains
> of OK and AR, Ouachita tectonic belt province. Age changed to Late
> Cambrian and Early Ordovician. (Hart and others,1987)

**\_at-Lower part of Arbuckle Group and Timbered Hills Group**

> Series: Cambrian
>
> Maximum Age: Late Cambrian
>
> Minimum Age: Late Cambrian
>
> Lithology:
>
> Major: limestone, dolomite, siltstone, sandstone, conglomerate, and
> shale
>
> Minor:
>
> Incidental:
>
> **LAWTON-** Limestone, dolomite, siltstone, sandstone, conglomerate,
> and shale, with glauconitic and hematitic zones; thickness, 1,200 to
> 2,000 feet (370 to 600 m), faulted in isolated areas. Lower part of
> \"Arbuckle Group\" includes \"Signal Mountain Formation, Royer
> Dolomite,\" and \"Fort Sill Limestone; Timbered Hills Group\" includes
> \"Honey Creek Formation\" and \"Reagan Sandstone.\"

**\_b- Arbuckle Group and Timbered Hills Group**

> Series: Cambrian
>
> Maximum Age: Late Cambrian
>
> Minimum Age: Late Cambrian
>
> Lithology:
>
> Major: limestone, dolomite
>
> Minor:
>
> Incidental:
>
> **CLINTON-** Limestone and dolomite; one outlier at southern end of
> quadrangle, about 1,200 feet thick.

**\_th-Timbered Hills Group**

> Series: Cambrian
>
> Maximum Age: Late Cambrian
>
> Minimum Age: Late Cambrian
>
> Lithology:
>
> Major: sandstone, limestone, dolomite
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN**- \"Honey Creek Limestone,\" above, is gray, fine
> grained; grades eastward into dolomite; thickness 90 to 250 feet.
> \"Reagan Sandstone,\" at base, is brown, coarse grained; thickness, 60
> to 450 feet. Occurs in the ARBUCKLE MTNS
>
> **Comments:** Comments: Timbered Hills Group: Named for East and West
> Timbered Hills of Arbuckle Mountains, South Oklahoma folded belt
> province. Group consists of (ascending): Reagan sandstone, brown
> quartzite and arkose conglomerate and coarse sandstones becoming limy
> at top, 460 ft thick; and Honey Creek formation, gray, crystalline,
> fossiliferous limestone containing glauconite, 124 ft thick. (Decker,
> 1939)

**\_p- Colbert Porphyry**

> Series: Cambrian
>
> Maximum Age: Middle Cambrian
>
> Minimum Age: Middle Cambrian

Lithology:

> Major: rhyolite porphyry
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Rhyolite porphyry, red-brown, flow-banded;
> thickness, 7,500 feet. Probably rests on 7,500 feet of metasedimentary
> and basaltic rocks in geosynclinal province of western Arbuckle
> Mountains. (525 million years old) Occurs in the ARBUCKLE MTNS

**\_bf- Butterfly Dolomite + Signal Mountain Limestone + Royer Dolomite
and Fort Sill Limestone**

> Series: Cambrian
>
> Maximum Age: Late Cambrian
>
> Minimum Age: Late Cambrian

Lithology:

> Major: limestone, dolomite
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN**- Limestone, gray, fine-grained, gradational
> eastward into tan to pink fine- to coarse-grained dolomites;
> thickness, 570 to 1,600 feet, decreasing eastward. (Arbuckle Group)
> Occurs in the ARBUCKLE MTNS

**\_cr- Carlton Rhyolite Group**

> Series: Cambrian
>
> Maximum Age: Middle Cambrian
>
> Minimum Age: Middle Cambrian
>
> Lithology:
>
> Major: rhyolite flows, tuffs, conglomerate, diabase sills
>
> Minor:
>
> Incidental:
>
> **CLINTON-** Rhyolite flows and tuffs; about 4,500 feet thick; one
> outlier is shown in southern part of mapped area.
>
> **LAWTON-** Rhyolite flows, tuffs, conglomerate beds, and diabase
> sills; thickness, 4,500 feet (1,370 m).
>
> **Comments**: Raised in rank to Carlton Rhyolite Group in area,
> southern Oklahoma, where it is present in \"Wichita Province\" (east
> to west, mostly in subsurface): western Bryan Co (Ouachita tectonic
> belt province); Marshall, Love, Carter, Murray, Jefferson, Stephens,
> Grady, Cotton, Comanche, Kiowa, and northern Greer Cos (South Oklahoma
> folded belt province); Jackson Co (Palo Duro basin); and Caddo,
> Beckham, and Washita Cos (Anadarko basin). Is an extrusive rock,
> consisting mainly of rhyolite flows and tuffs, together with beds of
> agglomerate and sills of diabase. Includes Colbert Porphyry of western
> Murray Co. Represents the last stage of basement-rock filling of the
> southern Oklahoma geosyncline. Maximum exposed thickness 3,600 ft on
> Bally Mountain \[sec 34, T6N, R14W, Kiowa Co\]. Lower part intruded by
> numerous thick sills of Wichita Granite Group; Wichita is the
> intrusive equivalent of Carlton. (Ham, 1963)

**\_wg- Wichita Granite Group**

> Series: Cambrian
>
> Maximum Age: Middle Cambrian
>
> Minimum Age: Middle Cambrian

Lithology:

> Major: granite
>
> Minor:
>
> Incidental:
>
> **CLINTON-** Pink, medium-grained granite; three outliers have been
> mapped in the southern part of quadrangle.
>
> **LAWTON-** Granites of various textures; thickness, 600 to 15,000
> feet (180 to 4,570 m).
>
> **Comments**: Probably named for Wichita Mountains of southern OK.
> Report area is southern Oklahoma, where it is present in (east to
> west, mostly subsurface): western Jefferson, Cotton, Comanche, Kiowa,
> and Greer Cos (South Oklahoma folded belt province); Beckham and
> Washita Cos (Anadarko basin); and Jackson and Harmon Cos (Palo Duro
> basin). Consists chiefly of perthite leucogranites of various textures
> representing multiple intrusions, in part having the form of extensive
> sills 600 to 1,500 ft thick intruding the lower part of the Carlton
> Rhyolite Group \[revised\--Carlton is the extrusive equivalent of
> Wichita\], and in part occurring as irregular plutons and sills
> cutting all other rocks of the \"Wichita Province.\" (Ham, 1963)

**\_r- Raggedy Mountain Gabbro Group**

> Series: Cambrian
>
> Maximum Age: Early Cambrian
>
> Minimum Age: Early Cambrian

Lithology:

> Major: gabbro, anorthosite, diorite
>
> Minor:
>
> Incidental:
>
> **LAWTON-** Gabbro, anorthosite, and diorite; thickness, as much as
> 10,000 feet (3,000 m).
>
> **Comments:** In southern Oklahoma, where it is present in: Comanche,
> Kiowa, and Greer Cos (South Oklahoma folded belt province); Tillman Co
> (Palo Duro basin); and Beckham Co (Anadarko basin). Consists of
> diallage and olivine gabbro, anorthosite, and diorite comprising a
> layered intrusion possibly 10,000 ft thick, injected as an elongate
> lens into rocks of the Late Precambrian or Lower Cambrian Tillman
> Metasedimentary Group (new), and is probably the chief stabilizing
> element of the horst-like evolution of the Wichita Mountains.
> Encountered in subsurface beneath Permian strata and in outcrops only
> in the most deeply eroded central part of Wichita Mountain uplift.
> (Ham 1963) Divided into the newly named Glen Mountains Layered Complex
> and the newly named Roosevelt Gabbros. Mapped (geologic map) in the
> Glen Mountains of Kiowa Co and in the Wichita Mountains of Comanche
> Co, both in OK in the South Oklahoma folded belt province. Glen
> Mountains Complex divided into the (ascending\[?\]) G, K, L, and M
> zones \[informal designations\]. Roosevelt Gabbros divided into the
> (ascending\[?\]) Mount Sheridan (new), Sandy Creek, and Glen Creek
> Gabbro Members. (Powell and others, 1980)

**=t- Tishomingo and Troy Granites**

> Series: preCambrian Proterozoic
>
> Maximum Age: Middle Proterozoic
>
> Minimum Age: Middle Proterozoic

Lithology:

> Major: granite
>
> Minor:
>
> Incidental:
>
> **ARDMORE-SHERMAN-** Granite, pink, with much microcline and biotite;
> \"Troy\" is fine grained; \"Tishomingo\" is coarse grained. Estimated
> thickness, 10 miles. (1.3 billion years old) Occurs in the ARBUCKLE
> MTNS
>
> **Comments:** TISHOMINGO: Named for Tishomingo, capital of Chickasaw
> Nation, Indian Territory, Midcontinent region, Johnston Co, OK. No
> type locality designated. Occurs in Tishomingo quad Is a
> coarse-grained, pink or reddish, microcline-rich granite with numerous
> basic dikes. Biotite is always present. Accessory minerals are zircon,
> apatite, magnetite, and sometimes garnet. Quartz monzonite occurs in
> intimate association with the granite and appears as phases of it.
> (Taff, 1902). TROY: Probably named for town of Troy, Johnston Co, OK,
> in Arbuckle Mountains district. Present on the southeastern flank of
> the exposed portion of the Arbuckle uplift, in Johnston Co (S.
> Oklahoma folded belt province) and Atoka Co (Ouachita tectonic belt
> province). Probably part of same intrusive body as Tishomingo granite,
> which is also present in this area. When unaltered, Troy is a medium-
> to fine-grained gray granite, speckled with black. It shows cleavage
> surfaces of a gray feldspar usually less than .5 mm broad, with
> occasionally a pinkish individual more than 1 cm across, rounded
> grains of colorless quartz, and many small black specks of biotite
> evenly distributed. There are 2 or 3 nearly vertical joint systems,
> spaced 2-40 ft apart, usually at right angles to each other. There are
> also strong sheet joints parallel or nearly parallel to the slopes of
> the granite hills, usually spaced 10-25 ft apart. (Taylor,1915)

**=g- Spavinaw Granite**

> Series: preCambrian Proterozoic
>
> Maximum Age: Middle Proterozoic
>
> Minimum Age: Middle Proterozoic

Lithology:

> Major: granite, rhyolite
>
> Minor:
>
> Incidental:
>
> **TULSA**- no description given
>
> **Comments**: Exposed in few small outcrops near Spavinaw, Mayes Co,
> OK, Midcontinent region, however, data from over 300 drill holes
> indicate that terrane underlies most of northeast OK, eastern KS,
> southwest MO, and northern AR. Spavinaw consists of anorogenic
> epizonal granite and rhyolite that have not been regionally
> metamorphosed. Terrane includes Washington Volcanic Group, Spavinaw
> Granite Group, Osage Microgranite and Central Oklahoma Granite Group.
> U/Pb ages taken on zircons by other workers date Spavinaw at 1.40-1.35
> Ga. (Kisvarsanyi, 1990)

**d- Diorite Sill**

> Series: Ordovician ?
>
> Maximum Age: Late Ordovician ?
>
> Minimum Age: Late Ordovician ?
>
> Lithology:
>
> Major: diorite
>
> Minor:
>
> Incidental:
>
> **McALESTER TEXARKANA**- Diorite, light-greenish-gray, medium- to
> fine-grained, quartz-free, with much andesine plagioclase and
> ferromagnesian minerals altered to chlorite and limonite; occurs in
> sections 10 and 15, Township 5 South, Range 23 East, in Womble
> Formation, striking North, 45 degrees East and dipping 10 degrees to
> 20 degrees Northwest; thickness, 2 to 10 feet. Occurs in POTATO HILLS,
> BROKEN BOW UPLIFT or ADJACENT SMALLER UPLIFTS IN SOUTHEASTERN PART OF
> OUACHITA MOUNTAINS