GEOLOGICAL SURVEY CIRCULAR 324

WYOMING, 1951

This report concerns work done on 

behalf of the U. S. Atomic Energy 

Commission and is published with 

the permission of the Commission.
UNITED STATES DEPARTMENT OF THE INTERIOR 

Douglas McKay, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

GEOLOGICAL SURVEY CIRCULAR 324

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN WYOMING

1951

By T. M. Cheney, R. P. Sheldon, R. G. Waring, and M. A. Warner

This report concerns work done on 

behalf of the U. S. Atomic Energy 

Commission and is published with 

the permission of the Commission.

Washington, D. C., 1954

Free on application to the Geological Survey, Washington 25, D. C.
STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN WYOMING

1951

By T. M. Cheney, R. P. Sheldon, R G. Waring, and M. A. Warner

Lot no.

Introduction.......................

Acknowledgments..................

Stratigraphy of the Phosphoria

formation in western Wyoming....

Stratigraphic sections..............

References................... ....

Tables of Stratigraphic sections

Red Creek .................. 1368

CONTENTS

Page

1

1

1

4

4

Lot no.

Tables of Stratigraphic 

sections Continued

Forellen Peak.............. . 1369

Hungry Creek.............. . 1375

Crystal Creek.............. . 1323

Teton Pass.................. 1370

Steer Creek ................. 1352

Cumberland ................. 1346

Page

11

14

17

20

ILLUSTRATIONS

Figure 1. Outcrops of the Phosphoria formation in Wyoming and localities sampled................

2. Generalized section of the Phosphoria formation at Coal Canyon, Wyoming [lot no. 1201],

Page

2

3

INTRODUCTION

The U. S. Geological Survey has measured and 

sampled the Phosphoria formation of Permian age at 

many localities in Wyoming and adjacent states. The 

data will not be fully synthesized for many years, but 

segments of the data, accompanied by little or no interpretation, are published as preliminary reports as 

they are assembled. This report, which contains abstracts of the sections measured in western Wyoming 

(fig. 1) during 1951, is the third Wyoming report of 

this series. The field and laboratory procedures 

adopted in these investigations are described in a 

previous report (McKelvey and others, 1953a).

Many people have taken part in this investigation. 

J. W. Hill, H. W. Peirce, J. A. Peterson, and 

R. A. Smart participated in the description of strata 

and the collection of samples referred to in this report. The laboratory preparation of samples for 

chemical analysis was done in Denver, Colo., under 

the direction of W. P. Huleatt. Most of the P2 05 and 

acid-insoluble analyses were made for the Survey by 

the U. S. Bureau of Mines at the Northwest Electrodevelopment Laboratory, Albany, Oreg., under the 

direction of S. M. Shelton and M. L. Wright; the rest 

were made in the Survey laboratory in Denver, Colo. , 

under the direction of L. F. Rader, by G. W. Boyes, 

J. A. Miskowiec, and N. Morris.

K. S. Bergman compiled most of the data. 

Anita Wise organized the tabular data.

ACKNOWLEDGMENTS

Special thanks are due J. D. Love, W. W. RuDey, 

and J. Steele Williams, who contributed much in the 

way of advice and suggestions in planning and organization of the field program. The cost of both the field 

and laboratory investigations has been borne partly by 

the Division of Raw Materials of the Atomic Energy 

Commission. It is a pleasure to acknowledge the fine 

cooperation extended to the field parties by the local 

residents, property owners, and phosphate companies, 

who furnished information and services and gave 

access to property.

STRATIGRAPHY OF THE PHOSPHORIA FORMATION 

IN WESTERN WYOMING

In northwestern Wyoming the Phosphoria formation is about 200 feet thick and has been divided into 

five members. These members have been tentatively 

correlated with the five members in Montana that are 

designated the A, B, C, D, and E members from oldest 

to youngest (Klepper and others in McKelvey, 1949). 

Member _A, overlies the Tensleep sandstone of 

Pennsylvanian age and consists of cherty carbonate 

and detrital rocks; it may be equivalent to the upper 

part of the Wells formation in Idaho. Members B_, C_, 

and D, composed respectively of phosphatic, cherty, 

and phosphatic rocks, are equivalent to the phosphatic 

shale member, Rex chert member, and upper shale 

member of the Phosphoria formation in Idaho and
1312 11361 

201 FlSM Outcrop of Phosphoria formation, 

dotted where questionable

Location and lot number of sample 

locality included in this report

Location and lot number of sample 

locality included in other reports

Compiled tad modified from Love and otben. 1952

10 0 40 MiteS

Figure 1. Outcrops of the Phosphoria. formation in Wyoming and localities sampled.

2
30

PERCENT 

20 10

THICK- *v«*«

NESS P2 °6'"

IN FEET PERCENT DESCRIPTION

IOO

ISO

200

260

266

48

67

13

14

15

10

29

21

11

18

13

tract

23

19

28

23

16

Dinwoody formation

Mods tone

'Phosphoria formation

Upper shale member

Phosphate rock: pisolitic, medium-hard, grayish-brown, thick-bedded; chert at base

Mudstone: hard, grayish-brown and brownish-black, thin- and thick-bedded; some 

medium-hard interbedded dolomite

Phosphate rock: oolitic and non-oolitic, hard, black, thin- and thick-bedded; 

chert and mudstone interbeds

Rex chert member

Cbert and limestone: hard, black, thick-bedded chert; hard, brownish-gray, thick* 

bedded limestone represents about 10 percent of unit

Covered

Phosphatic shale member

Dolomite: hard, brownish^gray and black, thick-bedded; mndstone and phoaphnte 

rock interbeds

Phosphate rock: oolitic, medium-hard, dark-gray nnd brownish-black, fissile to 

thick-bedded; soft limestone and mudstone interbeds ___

Limestone: hard, gray, thick-bedded; mndstone and phosphate-rock interbeds

Mudstone: hard, black, fissile to thick-bedded. "Vanadiferous zone," 0.68 percent 

average VO, content

Dolomite, mudstone, and limestone: interbedded, argillaceous hard, brownishblack dolomite, p'hosphatic soft to medium-hard, Unckmndstone.andnrgillnceous 

hard, brownish-black limestone

Phosphste rock: coarse-grained, oolitic, soft, black, thin-bedded

Dolomite: soft, black, thick-bedded; phosphate rock interbedded near top

Phosphate rock; medium coarse-grained, oolitic, soft, black, thin-bedded

Mndstone and dolomite: interbedded soft, black, thin-bedded mudstone and mediumhard, brownish-black, thin-bedded dolomite; some finely oolitic, black, phosphate rock ____ _________________________

Phosphate rock: oolitic, soft to mediumrhard, black, fissile to thin-bedded

Dolomite; soft to hard, brownish-black to black, thin- to thick-bedded

Phosphate rock: oolitic, soft to medium-hard, black, fissile to thin-bedded; 

dolomite and mudstone interbeds.

Mudstone; medium-bard, brownish-black to black, fissils to thin-bedded; phosphate rock at base

Wslis formation

Limestone

Figure 2. Generalized section of the Phosphoria formation at Coal Canyon, Wyoming (lot no. 1201).
southwestern Wyoming (Sheldon in Swanson and others, 

1953). Member E, not yet recognized in southeastern 

Idaho, consists oTchert, sandstone, and carbonate 

rock and is overlain by the Dinwoody formation of 

Triassic age.

In southwestern Wyoming the Phosphoria formation consists of 3 members: a lower phosphatic shale 

member, 95-145 feet in thickness; the Rex chart member, cherty limestone, 65-145 feet in thickness; and 

the upper shale member, 15-60 feet in thickness (fig. 2). 

Although the underlying Wells formation of Pennsylvanian age consists largely of quartzose sandstone, 

calcareous in part; the upper 25 feet or more is a 

dark-gray limestone that is equivalent to the upper 

member of the Wells formation in Idaho and may be 

the correlative of the lowermost member (the A_ member) 

of the Phosphoria formation in northwestern Wyoming 

and Montana and, according to McKelvey (1949), the 

lower limestone member of the Park City formation in 

Utah. The overlying Dinwoody formation of Triassic 

age consists of limestone, calcareous siltstone, and 

sandstone.

The correlation of individual beds of the phosphatic shale members with those in adjacent parts of 

Idaho, Montana, and Utah will be discussed in greater 

detail in a later publication. The phosphatic shale 

member in southwestern Wyoming and its correlative, 

the B_ member, in northwestern Wyoming, contain most 

of the phosphate-bearing layers. The upper shale 

member and its correlative, the D_ member, contain 

only thin layers of phosphatic chert and phosphatic 

layers of local significance.

STRATIGRAPHIC SECTIONS

Analytical data and abstracts of stratigraphic 

sections measured at seven localities follow. Their 

locations, as well as the locations of those reported 

previously (McKelvey and others, 1953b, Sheldon and 

others, 1953) and of others to be reported later, are 

shown in figure 1.

REFERENCES

Gardner, L. S., 1944, Phosphate deposits of the

Teton Basin area, Idaho and Wyoming: U. S. Geol.

Survey Bull. 944-A. 

Love, J. D., Weitz, J. L., and Hose, R. K., 1952,

Geologic map of Wyoming: U. S. Geol. Survey. 

McKelvey, V. E., 1949, Geological studies of the

western phosphate field: Am. Inst. Min. Met. Eng.

Mining Trans., v. 184, p. 270-279. 

McKelvey, V. E., Davidson, D. F., O'Malley, F. W.,

and Smith, L. E., 1953a, Stratigraphic sections

of the Phosphoria formation in Idaho, part 1:

U. S. Geol. Survey Circ. 208 

McKelvey, V. E., Smith, L. E., Hoppin, R. A.,

and Armstrong, F. C., 1953b, Stratigraphic sections

of the Phosphoria formation in Wyoming, 1947-48:

U. S. Geol. Survey Circ. 210. 

Sheldon, R. P., Waring, R. G., Warner, M. A.,

and Smart, R. A., 1953, Stratigraphic sections of

the Phosphoria formation in Wyoming, 1949-50:

U. S. Geol. Survey Circ. 307. 

Swanson, R. W., McKelvey, V. E., and Sheldon, R. P.,

1953, Progress report of investigations of northwest

phosphate deposits: U. S. Geol. Survey Circ. 297.
Red Creek, Wyo., lot 1368

Phosphoria formation measured and sampled at natural exposures on Red Creek about | mile from its junct

miles east of the Snake River Ranger Station, Yellowstone National Park. The area is unsurveyed. 

north flank of a small anticline. Beds strike north-south and dip 20* E. Section measured and sam

Waring, T. M. Cheney, and R. A. Smart in August 1951. Samples analyzed by U. S. Bureau of Mine

Bed 

no. Rock description

Sample 

no.

Thickness 

(feet)

Chemical an

___(percen

P2°5

i

Phosphoria formation top not exposed

A few feet of cover separate the Phosphoria 

formation from the Chugwater formation.

P-33 Sandstone; fos. col. no. 12553 - .

P-32 Chert, sandy-- --.-..

P-31 Chert 

P-30 Chert 

P-29 Chert 

P-28 Chert 

01 P-27 Chert 

P-26 Chert 

P-25 Chert 

P-24 Chert 

P-23 Chert 

P-22 Phosphate rock, argillaceous; fos. col. no. 12552 6581- RPS

P-21 Sandstone - ---- -- 

P-20 Chert, sandy and phosphatic sandstone -----

P-19 Sandstone, phosphatic and cherty sandstone -----

P-18 Sandstone, cherty - -- ______ ____

P-17 Sandstone, cherty _-- -- __________ __

The remainder of the section was measured on 

opposite (east) side of Red Creek. The correlation between segments is reliable.

P-16 Chert, sandy and cherty sandstone __ _

P-15 Sandstone, carbonatic - - ____ _

P-14 Sandstone, cherty; fos. col. no. 12551 -_-_-____

P-13 Chert, sandy -

P-12 Mudstone, phosphatic and mudstone __ ____ 6582-TMC

P-ll Sandstone, carbonatic, phosphatic chert,

and chert --- - - ------ 6583-TMC

8.2 

3.6 

7. I 

8.5 

3.4

2.7 

4.8 

2.2 

2.5 

6.5

4.3 

.6 

4.5 

6.7 

2.2

5.7 

1.5

12.5

.6

6.6

2.5 

.5

1.5

20.4

12.3 

9.5

1 Fossil collection made by J. E. Smedley, U. S. Geological Survey.
Red Creek Continued

Bed 

no.

P-10 

P- 9 

P- 8 

P- 7 

P- 6

P- 5 

P- 4 

P- 3 

P- 2 

P- 1

Rock description

Carbonate rock, sandy; fos. col. no. 12550-- 

Sandstone, carbonatic - - - 

Sandstone; fos. col. no. 12549 - - - -

Sandstone, carbonatic; fos. col. no. 12548 

Carbonate rock, sandy - -- - 

Carbonate rock - - - 

Sandstone, conglomerate; fos. col. no. 12547- 

Sample 

no.

--

Thickness 

(feet)

2.9 

.9 

3.0 

15.0 

2.4

2.6 

11.2 

2.9 

3.2 

5.0

Chemical an

(percen

P2°5

Tensleep formation top beds only

T- 1

T- 2

T- 3 

T- 4

Carbonate rock, chert, and sandstone; fos. 

col. no. 12546 

Quartzite - - - -

--

1.9 

2.9 

6.4 

3.4

--
Forellen Peak, Wyo., lot 1369

Phosphoria formation measured and sampled at a natural exposure on south slope of Forellen Peak in the no

National Park, unsurveyed land. Section crops out on the east flank of an anticline. Beds strike no

Section measured and sampled by R. P. Sheldon, R. G. Waring, and R. A. Smart in August 1951. Sa

Bureau of Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical an

_____(percen

P2°5

Phosphoria formation top not exposed

A 3- to 5-foot covered interval separates the 

Phosphoria formation from the Dinwoody 

formation.

P-30 Sandstone, cherty; fos. col. no. 12560 - --

P-29 Covered interval - - - -- 

P-28 Sandstone -- _---

* &( sandstone __ ___ __ ______ _ 

P-26 Sandstone, cherty ------- -- _______ _

P-25 Covered interval - - ---- - 

P-24 Sandstone, carbonatic; fos. col. no. 12559 --

P-23 Covered interval --

P-22 Chert, sandy; fos. col. no. 12558 -- -- --

P-21 Covered interval (probably chert); fos. col.

HO J» <£*?*? O » » " » » -«-^«««- -»-»-»^ » » -- ^ _- »-. »-__»-.

P-20 Chert, argillaceous; fos. col. no. 12558 -

P-19 Covered interval - - -- -- 

P-18 Chert, argillaceous - - - --

P_ 1 7 <~*>>«3*»+ _ _ __ ___ _ __ ___ __ X I \^f Aid I ______ _

P-16 Covered interval ----- --- - 

P-15 Chert, sandy-- --

P-14 Chert, sandy __ _

P-13 Chert _-______-__-___-________

P-12 Phosphate rock, argillaceous; fos. col. no.

12557 6584-RGW 

P-ll Sandstone; fos. col. no. 12557 __-

P-10 Sandstone, carbonatic; fos. col. no. 12557 -.

P- 9 Sandstone, cherty and carbonatic sandstone --

P- 8 Sandstone, carbonatic; fos. col. no. 12556 _-

P- 7 Sandstone; fos. col. no. 12556 --

P- 6 Sandstone --

2.5 

5.0 

7.5 

7.4 

3.3

5.0

4.9

10.0

3.4

3.3

6.0 

2.0 

2.4 

5.2 

7.0

12.5

6.2

18.3

.6 

1.0

4.5 

1.8 

2.5 

6.4 

17.0

23.9 

1 Fossil collection made by J. E. Smedley, U. S. Geological Survey.
Forellen Peak Continued

Bed 

no.

P- 5 

P- 4 

P- 3 

P- 2 

P- 1

Rock description

Sandstone; fos. col. no. 12555 ----- -- -

Chert, argillaceous ------ -----

Covered interval - --- - ---- ---

Sandstone, phosphatic; fos. col. no. 12554 ---

Sample 

no.

--

Thickness 

(feet)

6.0 

6.0 

6.2 

20.0

Chemical ana

(percent

P2°5

i

Tensleep formation not measured

oo
Hungry Creek, Wyo.. lot 1375

Upper shale and Rex chert members of the Phosphoria formation measured and sampled in a bulldozer tren

on Hungry Creek about 9 miles southeast of Victor, Idaho, on the Teton Pass highway, sec. 97, T. 

County, Wyo., on the southwest limb of an anticline. Beds strike N. 20° W. and dip 40° SW. Sectio

R. P. Sheldon, T. M. Cheney, and J. A. Peterson in October 1951. Samples analyzed by U. S. Burea

Oreg.

Bed

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

___(percent)___

P2°5

Acid 

insoluble

Upper shale member of Phosphoria formation top not exposed

U-18 Sandstone; fos. col. no. 12667 1 6794-TMC

U-17 Covered interval ----------- ___________

U-16 Mudstone and mantle - - -- -- --- 

Bed U-16 badly slumped and mixed with 

mantle,

U-15 Mudstone, carbonatic-- - -- -- 6793- RPS 

U-14 Carbonate rock, argillaceous and

carbonatic mudstone - ------ ------ - 6792- RPS

1:0 U-13 Mudstone, carbonatic--- - -- - - 6791- RPS

U-12 Mudstone, carbonatic and mantle ---- ---- 6790- RPS

U-ll Mudstone and mantle ----- - - -- .

Beds U-ll and U-12 badly slumped and 

mixed with mantle.

U-10 Mudstone, carbonatic------- --- 6789-TMC

U- 9 Mudstone, carbonatic 6788-TMC

U- 8 Mudstone 6787- JAP

U- 7 Phosphate rock, argillaceous, carbonatic -- 6786- JAP

U- 6 Mudstone, carbonatic-- - - -- ------ 6785- JAP

U- 5 Phosphate rock, argillaceous ---- - -- 6784- JAP

U- 4 Phosphate rock, argillaceous -- --------- 6783- JAP

U- 3 Mudstone, carbonatic - ---- 6782- JAP

U- 2 Mudstone, carbonatic --- ---- 6781- JAP

U- 1 Phosphate rock, argillaceous; fos. col.

no. 12666 6780- JAP

5.4

14.0

4.0

3.0 

1.0

1.3 

1.2 

3.5

5.5

5.7

4.5

.2

.9

.4

.6

2.5

2.2

.7

6.3

4.2 

1.7

3.3 

3.0

2.2

2.3

1.9

17.3

3.3

24.6

24.6

3.6

5.4

28.6

76.8

47.7

41.3

48.6

60.3

55.03

63.2

72.06

30.06

58.8

19.4

19.6

57.8

57.6

20.5

* Fossil collection made by H. I. Saunders, U. S. Geological Survey. 

* Cumulative data incomplete because of missing information. Computations start from zero after interruption.
Hungry Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

___(percent)___

P2°5

Acia 

insoluble

C

Rex chert member of Phosphoria formation

R-24 Sandstone; fos. col. no. 12665 - - 

R-23 Sandstone, carbonatic and sandy chert;

	fos. col. no. 12664 -- -- -- - ----- 

R-22 Sandstone - - - - 

R-21 Carbonate rock, argillaceous; fos. col.

	no. 12663 

R-20 Sandstone, carbonatic - - -

R-19 Carbonate rock- - - -

R-18 Covered interval; carbonate rock float -----

R-17 Carbonate rock- - -- 

R-16 Carbonate rock - _____ __-- _-_

R-15 Carbonate rock - - - --

R-14 Chert 

R-13 Carbonate rock; fos. col. no. 12662 - - -

R-12 Sandstone and chert; fos. col. no. 12661 - -

o R-ll Carbonate rock- - -

R-10 Sandstone - - - - 

R- 9 Covered interval; contains a few outcropping 

	sandstone beds --- --

R- 8 Sandstone -- 

R- 7 Chert 

R- 6 Sandstone; fos. col. no. 12660 - -- 

R- 5 Chert 

R- 4 Sandstone; fos. col. no. 12659 

R- 3 Carbonate rock -

R- 2 Phosphate rock, sandy --- -

R- 1 Carbonate rock - - - -- -- -

4.3

3.4 

2.8

8.8 

4.0

2.5 

3.2 

3.4 

5.4 

6.2

.9

13.3 

7.0 

1.8 

2.2

5.5 

5.1 

2.7 

7.0 

2.2

4.5 

.3 

.4 

.4

Phosphatic shale member of Phosphoria formation not measured

The phosphatic shale member is badly 

crumpled and thinned at this locality. 

Gardner (1944) has described and sampled 

the phosphatic shale member at locality B 

about \ mile southeast of this locality. ---

Wells formation top bed only

Cw-1 Chert 11.0 
Crystal Creek, Wyo. , lot 1323

Phosphoria formation measured and sampled at a natural exposure near Crystal Creek, S^NWi sec. 34, T. 4

County, Wyo. Beds strike N. 10° E. and dip 20* E. D and E members measured and sampled by R. 

J. W. Hill, R. A. Smart, and M. A. Warner in July 1950; B and C members measured and sampled by 

Smart in August 1951. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

C 

th

Dinwoody formation not measured

E member of Phosphoria formation

E- 8 

E- 7 

E- 6 

E- 5 

E- 4

E- 3 

E- 2 

E- 1

Mudstone 

Chert --- 

Mudstone 

Sandstone 

Chert --- 

Chert ------------

Chert and mudstone 

Chert, carbonatic - 4899- HWP

9.0 

1.2 

2.4 

1.9 

10.2

22.8 

9.8 

3.0 0.7 81.8

D member of Phosphoria formation

D-25 

D-24

D-23 

D-22 

D-21

D-20 

D-19 

D-18 

D-17 

D-16

D-15 

D-14

D-13 

D-12 

D-ll

Mudstone; fos. col. no. 12124 - - - 

Mudstone, carbonatic and argillaceous

phosphate rock; fos. col. no. 12123 -- - 

Mudstone, carbonatic and phosphate rock 

Mudstone, carbonatic; fos. col. no. 12122 

Mudstone, carbonatic - - -

Carbonate rock, argillaceous 

Mudstone, carbonatic - - 

Mudstone, carbonatic ---- - 

Mudstone, carbonatic - -- 

Mudstone, carbonatic - - 

Carbonate rock - -------- ________

Mudstone; contains calcareous mudstone 

concretion 0. 5 foot thick - ------ .

Mudstone, calcareous - 

Mudstone, carbonatic; fos. col. no. 12121 

Mudstone, carbonatic - -- 

4898-HWP

4897-HWP 

4896- HWP 

4895-HWP 

4894-HWP

4893- HWP 

4892-HWP 

4891-HWP 

4890-RGW 

4889-RGW

4888-RGW

4887-RGW 

4886-RGW 

4885-RGW 

4884- RAS

2.5

1.0

1.6

1.4

.8

.8

1.2

1.3 

1.6 

1.5

.6

3.3 

3.2

2.0

2.1

1.4

5.3 

8.6 

2.7 

3.0

1,5 

2.3 

1.4 

1.7

1.4

.5

1.3

1.4 

2.3 

1.5

69.6

55.7

45.9

56.3

53.4

38.8

53.1

54.7

57.5

63.1

9.9

61.7

56.8

55.3

56.0

1 Fossil collection made by J. E. Smedley, U. S. Geological Survey.
Crystal Creek Continued

Bed 

no.

D-10

D- 9 

D- 8 

D- 7

D- 6

D- 5 

D- 4 

D- 3

D- 2 

D- 1

Rock description

Phosphate rock, argillaceous; fos. col. 

no. 12120 

Mudstone; fos. col. no. 12119 - - -

Mudstone, carbonatic __ _ _ _

Mudstone, phosphatic, carbonatic; fos. 

col. no. 12118- 

Mudstone, carbonatic; fos. col. no. 12117 -- 

Mudstone; fos. col. no. 12116 -- --- _-_-

Sample 

no.

4883- RAS 

4882-MAW 

4881 -MAW 

4880-MAW

4879-MAW

4878-MAW 

4877-MAW

4876-MAW 

4875-MAW

Thickness 

(feet)

1. 1 

1.3 

1.5 

2,3

.7 

(-5) 

4.7 

1.6

3.5

5.2 

3.2

Chemical analyses 

(percent)

P2°5

23.9 

1.2 

2.2 

5.3

20.3

3.0 

8.7

12. 1 

4.1

Acid 

insoluble

17.5 

24.4 

59.2 

54. 1

25.2

52.5 

62.7

34.5 

56.1

C 

t

The remaining lower portion of the Phosphoria formation at Crystal Creek was not measured in 1950, but w

Waring, R. A. Smart, and R. P. Sheldon in August 1951. Location and geologic setting already descr

by U. S. Bureau of Mines laboratory, Albany, Oreg.

D member of Phosphoria formation basal bed only

D- 1 Phosphate rock, logged as equivalent 

to sample 4877-MAW (bed D-4) above 6580 -RGW 0.5 24.1 19.7 

C member of Phosphoria formation

C-23 Sandstone, phosphatic; fos. col. no. 

12545 

C-22 Sandstone; fos. col. no. 12545 

C-21 Sandstone, carbonatic and chert; fos. 

col. no. 12544 -------- ----

C-20 Sandstone, phosphatic; fos. col. no.

1 7544

C-19 Sandstone; fos. col. no. 12544 -- 

C-18 Sandstone and chert; fos. col. no. 12543 ---- 

C-17 Sandstone, carbonatic; fos. col. nos. 

12543 and 12542 - -

C-16 Carbonate rock; fos. col. no. 12541 - 

6579- RGW 

6578- RGW

6577- RGW 

6576- RGW

0.5 

4.5

4.0

1. 1 

3.9

2.4

5.9 

3.7

11.6 

9.5

20.4 

12.2 

58.8 

34.9

22.3 

12.3
C-15 

C-14 

C-13 

C-12 

C-ll

c-io

C- 9

C- 8 

C- 7 

C- 6

C- 5 

C- 4 

C- 3 

C- 2 

C- 1

Carbonate rock - -- __---_. 

Carbonate rock; fos. col. no. 12540- 

Carbonate rock ------- - --

Mudstone, carbonatic ---- -----

Carbonate rock, argillaceous -----

Carbonate rock, sandy -- - .

Carbonate rock, argillaceous, sandy;

fos. col. no. 12539 

Sandstone ------------------------.

Sandstone, cherty---- ----- - .

Chert 

Mudstone, carbonatic; fos. col. no. 12538 

Chert - ----- -_ ..

Chert and cherty mudstone------ _-__.

Chert -- -- 

Chert and cherty mudstone----- -------

9.4 

3.1 

1.3 

4.0 

1.0

2.0

1.8 

3.0 

1.2 

5.3

1.0 

4.4 

2.6 

1.2 

2.4

B member of Phosphoria formation

B-12 

B-ll 

- B-10 

B- 9 

co B- 8

B- 7 

B- 6 

B- 5 

B- 4 

B- 3

B- 2 

B- 1

Mudstone -- - ----------- ________

Siltstone - - -------- ---- _____ _

Mudstone, carbonatic ---------- - -- -

Mudstone and phosphate rock -------------

Mudstone, cherty ------- --- - -_____- 

Mudstone ------ -- --- -- -- - -

"PV» rtcnViQ "f n> T*rtr*t Q f*rtil 1 Q r*ortn G _ _ _ _ _» _» _ __»

6575- RAS 

6574- RAS

6573- RAS 

6572- RAS

2.7 

3.2 

3.3

.7 

1.4

.6 

.3 

.6 

1.0 

.8

.7 

.8

5.2 

11.5

15.4 

25.0

62.3 

42.3

40.7 

19.7

Tensleep formation not measured

present but not described. Consists of

-- -- -- 
Teton Pass, Wyo. , lot 1370

22, mile west of Teton Pass summit, sec. 

easured and s 

1951. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, Oreg.

Phosphoria formation sampled in road cut on U. S. Highway no.

County, Wyo. Beds strike N. 65° W. and dip 60° N. Section measured and sampled by R. G. Waring 

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical ana

(percent

P2°5

i

Dinwoody formation basal bed only

Trd-1 Sandstone, carbonatic - - -

Upper shale member of Phosphoria formation top not exposed

U-17 

U-16 

U-15 

U-14 

U-13

U-12 

U-ll 

U-10 

U- 9 

U- 8

U- 7 

U- 6 

U- 5 

U- 4

U- 3

U- 2 

U- 1

The Phosphoria formation and Dinwoody 

formation are separated by a fault of 

unknown stratigraphic displacement. 

Hence bed U-17 is not necessarily the 

highest bed in the Phosphoria formation.

Chert and cherty mudstone -- -

Mudstone - - - -

Mudstone - -- - - -

Mudstone -- - - --

Mudstone - - - 

Mudstone - - - - -

Mudstone - - - 

Mudstone ---- 

Phosphate rock, argillaceous; fos. col. no.

1 > Rfl 1 * _ _

Mudstone 

Mudstone, phosphatic -- - -

6590- RAS 

6589- RAS

7; 5

12.6 

8. 1 

1.0 

1.4

.6 

2.4 

1.9 

2.0 

1.2

1.7 

2.3 

.9

.2 

1.1

2.2 

1.9

Rex member of Phosphoria formation

R-25 

R-24 

R-23

f *» T*V^ rtn Q t (3k T*rtf*lf « « _

 *"* 5) T* V^ f\Y\ Q t |H T* f\f* If Jl_ JM. ___ JM. JM.JM.J-

--

2.5 

3.2 

2.3

25.3 

14.3
R-22 Carbonate rock; fos. col. no. 12579

R-21 Carbonate rock; fos. col. no. 12579

R-20 Carbonate rock -- -- ----

R-19 Carbonate rock - -- -- 

R-18 Mudstone -- 

R-17 Mudstone; fos. col. no. 12578 -----

R-16 Mudstone --- - - - -----

R-15 Mudstone and chert - - - 

R-14 Mudstone --- -- - -- -----

R-13 Mudstone -- 

R-12 Mudstone -- -- -------

R-ll Carbonate rock --------- -- --

R-10 Chert 

R- 9 Carbonate rock; fos. col. no. 12577

R- 8 Mudstone; fos. col. no. 12577 --

R- 7 Mudstone - -- --

R- 6 Mudstone - ------ - ___ 

R- 5 Quartzite ----- --__--__--___-__

R- 4 Carbonate rock ---- - 

R- 3 Carbonate rock, sandy -----------

R- 2 Chert --------------------------

R- 1 Sandstone, carbonatic -----------

This thickness of the Rex chert member is 

about 50 feet less than the average Rex chert 

member thickness over this area. No 

structure was nofed at this road cut.

2.2 

1.9 

2.3 

3.2 

.9

1.3

.4

.6

2.2

2.2

.8 

3.8

.5 

2.1 

3.3

1.5 

1.0 

2.2 

3.4 

1.7

3.7 

1.0

Phosphatic shale member of Phosphoria formation base not exposed

P-21

P-20 

P-19 

P-18 

P-17

P-16 

P-15

P-14 

P-13

P-12

Mudstone, che~ty, mudstone, and phosphate 

rock ------------ ______________________

Mudstone, cherty and cherty carbonate rock --- 

Phosphate rock; contains siltstone concretion - 

Sandstone and phosphate rock --- - - - 

Carbonate rock ------- --- - - ------

Mudstone; fos. col. no. 12576 -- - ---- 

Phosphate rock and chert. Sandstone and

chert lens occurs at top of unit. --------

Chert, sandy and phosphate rock --- - 

Mudstone. Sandstone lens occurs at top of

unit. -- --- --- --- -- 

Chert 

6588-RGW

2.9

2.1

.9

.9

.9

.9

.7 

1.3

1.9 

1.2

28.8 

1 Fossil collection made by J. E. Smedley, U. S. Geological Survey.
Teton Pass Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical an

___(percen

P2°5

i

P-ll Mudstone, chertyP-10 Chert, argillaceous

P- 9 Mudstone

P- 8 Mudstone

P- 7 Mudstone, phosphatic ------- ---- 6587- RAS

P- 6 Mudstone; fos. col. no. 12575-

P- 5 Mudstone and cherty mudstone

P- 4 Phosphate rock, argillaceous - 6586- RAS

P- 3 Mudstone

P- 2 Phosphate rock, carbonatic------- ----- 6585-RAS

P- 1. Mudstone

Bed P-l is not necessarily the lowest bed of 

the Phosphatic shale member because it is 

separated from the Wells formation by a 

fault.

0.5

.8

3.2

2.8

.6

1.3 

.5 

.4 

.5

1.5

1.1

16.2

22.4

21.7

Wells formation not measured

Present but not described. 

12574 

fos. col. no.
Steer Creek, Wyo., lot 1352

Phosphoria formation measured and sampled in a bulldozer trench and at a natural exposure on the west li

fork of Steer Creek, sec. 9, T. 36 N., R. 116 W., Lincoln County, Wyo. Beds strike N. 35° W., a

and sampled by T. M. Cheney, R. Go Waring, R. A. Smart, and M. A. Warner in July 1951. Sampl

Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Dinwoody formation lower part only

-E-d-S

-5x3-2

'B-d-l

Siltstone, carbonatic -- ---r --- - -

Sandstone, carbonatic; fos. col. nos. 

12647 1 and 12649 

7ft ft

3.5

4.3

Upper shale member of Phosphoria formation

U-14

U-13 

U-12 

U-ll 

U-10

U- 9 

U- 8 

U- 7 

U- 6 

U- 5

U- 4 

U- 3 

U- 2 

U- 1

Mudstone, phosphatic; fos. col. no. 

12646 -----------------------

Mudstone, carbonatic 

Mudstone -----------

Mudstone ---- ---

Mudstone - -----

Mudstone, carbonatic-- - Mudstone, phosphatic--- -- 

Mudstone, carbonatic- - 

Phosphate rock, argillaceousMudstone--'--- __-______.

Mudstone- -- - -- 

Mudstone- - ------

Mudstone, phosphatic--------

Phosphate rock, argillaceous6507-TMC 

6506-TMC 

6505-TMC 

6504-TMC 

6503-TMC

6502-TMC 

6501-TMC 

6500- RAS 

6499- RAS 

6498- RAS

6497- RAS 

6496- RAS 

6495- RAS 

5494- RAS

0.9 

2.1 

1.9 

1.4 

4.8

3.3 

5.0 

1.0 

1.9 

.6

1.9 

.8

1.0

1.1

10.8

3.6

3.7 

3.7 

4.1

6.2 

8.0 

4.6 

24.7 

5.5

4.6

6.8

11.1

29.2

59.3

57.9

71.7

70.8

66.0

54.9

58.8

53.5

21.2

61.6

68.1

57.1

45.1

18. 1

Rex member of Phosphoria formation

R-13 

R-12

R-ll 

R-10 

R- 9

Carbonate rock - ---- - --- 

Sandstone, phosphatic; fos. col. no.

12645 1 

Carbonate rock, argillaceous -- 

Carbonate rock ---------- --- 

Phosphate rock, carbonatic - - 

6493- RAS 

6492- RAS

2.0

1.0

1.6

2.2

.7

9.3

22.5

60. 1

9.4

1 Fossil collection made by H. I. Saunders, U. S. Geological Survey. 

2 Fossil collection made by J. E. Smedley, U. S. Geological Survey.
Steer Creek Continued

Bed 

no.

R- 8 

R- 7 

R- 6 

R- 5 

R- 4

R- 3 

R- 2 

R- 1

Rock description

f* 3 "fV^fMin to Y*Oolf _ _

/""* 3 T*V> f\n Q t O T* Of* If 

f* Q T*V\OTIQ to T*r\f*lr £t T*<TI 1 1 si f*or\n^ _

Carbonate rock, sandy; fos. col. no. 12644 _ 

Covered interval; largely carbonate rock ---

Sandstone - - - --

Phprt __ ____

Sample 

no.

Thickness 

(feet)

3.1 

3.0 

1.7 

2.4 

108.0

2.7 

.9 

2.3

Chemical analyses 

(percent)

P2°5

--

Acid 

insoluble

Phosphatic shale member of Phosphoria formation

P-37

P-36 

P-35 

P-34 

P-33

£ p-32 

P-31 

P-30 

P-29 

P-28

P-27

P-26 

P-25 

P-24 

P-23

P-22 

P-21 

P-20 

P-19

P-18

P-17 

P-16 

P-15 

P-14 

P-13

Phosphate rock, argillaceous and

Mudstone -- - -- ---- - ---

Mudstone ---- --- --- --- ----

Mudstone, carbonatic - - ---- -

Mudstone, carbonatic - - - 

Mudstone - - - ------ __ - 

Mudstone, phosphatic - -- - -

Mudstone -- ---- 

Mudstone - - ---- -- --- -

Phosphate rock, argillaceous and

phosphatic mudstone -- --- - 

Mudstone, phosphatic, carbonatic -- 

Mudstone - - -- - - -

Mudstone -- --- --- -- -

Mudstone, phosphatic --- ------ _

Mudstone and argillaceous phosphate rock 

Mudstone, phosphatic and carbonatic

Phosphate rock, carbonatic, argillaceous --

Mudstone, carbonatic -- -- - -

Mudstone, carbonatic - ----- 

Mudstone, phosphatic and carbonatic 

mudstone - -------- ------- _

6491 -MAW 

6490-MAW 

6489-MAW 

6488-MAW 

6487-MAW

6486-MAW 

6485-MAW 

6484 -MAW 

6483 -MAW 

6482-MAW

6481 -MAW 

6480-MAW 

6479-MAW 

6478-MAW 

6477-MAW

6476-MAW 

6475- RGW 

6474-RGW

6473- RGW 

6472- RGW

6471 -RGW 

6470- RGW 

6469 -RGW 

6468- RGW

6467 -RGW

0.8 

1.6 

1.8 

4.4 

2.0

.6 

2.4 

.5 

4.2 

1.8

.5 

1.4 

2.7 

.6 

1.0

1.3 

1.9 

.9

1.3 

.5

2.8 

.9 

1.3 

1.6

1.0

24.6 

5.6 

.5 

.3 

.9

3.6 

1.1 

14.4 

.6 

1.5

18.7 

13.3 

.5 

6.9 

1.7

14.2 

1.3 

10.1

13.3 

18.4

.9 

1.4 

4.3 

4.5

11.8

29.0 

64.1 

77.9 

66.0 

70.0

58.1 

83.7 

41.3 

76.7 

83.7

29.4 

34.7 

18.0 

63.3 

78.8

42.1 

23.8 

56.2

35.9 

24.8

23.8 

48.6 

48.7 

45.6

39.8
P-12

P-ll 

P-10

P- 9 

P- 8

P- 7 

P- 6 

P- 5 

P- 4 

P- 3

P- 2 

P- 1

Bed P-12 appears lens -like because of 

squeezing.

Mudstone, phosphatic and argillaceous

Mudstone, argillaceous, phosphatic - --

Mudstone, phosphatic; fos. col. no. 12643 --

6466- RGW

6465- TMC

6464 -TMC 

6463- TMC 

6462- TMC

6461 -TMC 

6460- TMC 

6459 -TMC 

6458- TMC 

6457- TMC

64 56 -TMC 

6455- RAS

.5

1.4

.8 

.6 

.6

1.6 

1.6 

1.9 

1. 1 

.9

1.3 

1.4

1.2

2.3

18.3 

10.8 

11.4

25.0 

6.8 

3.6 

29.5 

5.7

32.7 

8.4

11.9

6.5

27.2 

33.3 

33.1

13.3 

2.7 

2.3 

11.7 

62.9

10.3 

67.9

Wells formation upper part only

Cw- 1 

Cw- 2 

£ Cw- 3 

Cw- 4 

Cw- 5

Cw- 6 

Cw- 7 

Cw- 8 

Cw- 9 

Cw-10

Cw-11 

Cw-12 

Cw-13 

Cw-14

Mudstone - - ----- - --- --

Mudstone, carbonatic ----- __-_ _

Mudstone, sandy-- -- --- --- -

Mudstone, carbonatic ---- - -- -

Mudstone, carbonatic - -- - -- 

Sandstone, argillaceous __- __ 

Sandstone, argillaceous -- _ - _

Sandstone ------ - -- ___ - -

--

0.8 

3.8 

.6 

1.0 

1.8

.9 

1.8 

1.2 

5.7 

1.3

4.8 

3.6 

1. 1 

1.4

--

1 Fossil collection made by H. I. Saunders, U. S. Geological Survey.
Cumberland, Wyo., lot 1346

Phosphatic shale member of Phosphoria formation measured and sampled on the west limb on an anticline 

Cumberland, Wyo., SW^NE* sec. 19, T. 19 N., R. 117 W., Lincoln County, Wyo. Beds strike N. 1

Section measured and sampled by M. A. Warner, T. M. Cheney, R. A. Smart, and R. G. Waring in J

by Trace Elements Section laboratory, U. S. Geological Survey, Denver, Colo.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Rex chert member of Phosphoria formation basal beds only

R- 2 

R- 1

fh^rt -_-_-_-_____-------___-___----_-_-_ -- 3.9 

1.9 --

Phosphatic shale member of Phosphoria formation

P-80 

P-79 

P-78 

P-77 

P-76

coP-75 

o p-74

P-73 

P-72 

P-71

P-70 

P-69 

P-68 

P-67 

P-66

P-65 

P-64 

P-63 

P-62 

P-61

P-60 

P-59 

P-58 

P-57 

P-56

Phosphate rock, argillaceous,

Mudstone, carbonatic - - - - -

Carbonate rock, argillaceous, phosphatic 

Phosphate rock - - -- - 

6253 -MAW 

6252-MAW 

6251 -MAW 

6250-MAW

6249-MAW

6248-MAW 

6247-MAW 

6246-MAW 

6245-MAW 

6 244 -MAW

6243-MAW 

6242-MAW 

6241 -MAW 

6240 -MAW 

6239-MAW

6238-MAW 

6237-MAW 

6236-MAW 

6235-MAW 

6234-MAW

0.9 

1.2 

.6 

.9 

.5

.7 

3.1 

.4 

1.0

1.0

.5 

.7 

1.0 

.8 

1.2

3.5 

.4 

3.0 

1.2 

1.6

.8 

.7 

1.8 

.7 

.9

14.0 

2.65 

13.2 

2.20

13.5

14.7 

3.55 

16.7 

.60 

3.70

1.35 

23.5 

.80 

4.20 

12.7

.73 

19.9 

1.63 

25.6 

6.58

57.9 

84.8 

59.0 

88.2

18.7

49.6 

78.0 

47.4 

28.5 

72.7

61.4 

21.7 

81.4 

73.3 

17.3

40.9 

33.8 

67.2 

14.7 

22.6
P-55 

P-54

P-53 

P-52 

P-51

P-50 

P-49

P-48 

P-47 

P-46 

P-45 

P-44

P-43 

P-42 

P-41 

P-40 

P-39

P-38

P-37 

P-36 

P-35

P-34 

P-33 

P-32 

P-31 

P-30

P-29 

P-28

P-27 

P-26 

P-25

P-24 

P-23 

P-22 

P-21 

P-20

P-19

Mudstone, phoshatic -- - - 

Carbonate rock and calcareous

Mudstone - -- ,-- - -

Mudstone; fos. col. no. 12573 ------ 

Mudstone - - -- -

Mudstone -- - -- - 

Mudstone, carbonatic, phosphatic -- - -

Mudstone - - ---

Mudstone, carbonatic -- - --

Mudstone; fos. col. no. 12572 - -

Mudstone, phosphatic, carbonatic - -

Mudstone, phosphatic, carbonatic -

QT 1 tctrtno r* Q 1 r* Q v»Ortii c* 1 QK> g

{"* Q fV'irti'l Q to Y*f\f*\r" a ~v*tf i 1 1 a f*ortii c

(~* Q T*V\rtnQ to Ym rtr*lf a T*cfi 1 1 a r*ortii G

Phosphate rock, argillaceous, carbonatic --

f1 Q yO^rtfiQ to ff°if*\r

Mudstone, carbonatic; fos. col. no. 12571--- 

Mudstone, phosphatic - - 

Phosphate rock and phosphatic mudstone 

Carbonate rock, argillaceous; fos. col. 

no. 12570 

Mudstone, phosphatic - - 

Carbonate rock, phosphatic; fos. col. 

no. 12569 

Sandstone and phosphate rock 

6233-MAW

6232-MAW 

6231 -MAW 

6230-MAW 

6229-MAW

6228-MAW 

6227-MAW

6226-MAW 

6225-MAW 

6224-MAW 

6223 -TMC 

6222- TMC

6221 -TMC 

6220- TMC 

6219- TMC 

6218- TMC 

621 7- TMC

6216- TMC

6215- TMC 

6214- TMC 

6213- TMC

621 2- TMC 

6211 -TMC 

6210- TMC 

6209- TMC 

6208- TMC

6207- TMC

6206- TMC 

6205- TMC 

6204- RGW

6203- RGW

6202- RGW 

6201 -RGW 

6200- RGW 

61 99- RGW 

6198- RGW

6197- RGW

1.2

1.8 

.6 

1.4 

1.6

1.9 

1.5

1.1 

3.2 

2.4 

2.1 

1.6

2.1 

2.0 

1.0 

2.0 

1.1

1.9 

(1=2) 

1.5 

1.7 

1.0

.8 

.6 

1. 1 

2.1 

1.4

.8

1.2

.4 

.8

.5

.8 

.6 

3.9 

1.9 

1. 1

.8

9.55

1.73

1.00

.73

2.00

3.73

3.55

7.88

1.25

.73

5.13

6.50

5.00

3.30

8.23

7.65

9.55

19.2

1.10

1.65

9.15

13.2

4.85

7.35

10.9

12.6

17.8

3.80

9.75

18.6

10.7

2.35

8.70

2. 15

3.40

15 6 0

3.10

48.9

18.1

87.8

78.7

65.3

64.2

79.0

41.9

79.3

78.4

42.6

45.5

58.1

66.6

33.5

31.4

29.1

18. 7

30.0

30.2

39.6

19.6

16.2

36.4

46.6

25. 1

33.3

30.9

67.2

43.2

2.5

26.2

67.6

39.7

30.2

45.4

82.2

1 Fossil collection made by J. E. Smedley, U. S. Geological Survey.
Cumberland Trench Continued

Bed 

no.

P-18

P-17 

P-16

P-15 

P-14

P-13

P-12 

P-ll 

P-10 

P- 9

P- 8 

P- 7 

P- 6 

P- 5 

P- 4

P- 3 

P- 2 

P- 1

Rock description

Phosphate rock, argillaceous and phosphate 

rock; fos. col. no. 12568 

Mudstone and phosphatic mudstone; 

contains calcite geodes; fos. col. no. 12567- 

Mudstone; fos. col. no. 12566 - -

Mudstone----- - - -- --- - 

Carbonate rock, argillaceous; fos. col. no. 

12567 

Mudstone and chert - - - - - -

Mudstone-- - - - --- - - 

Mudstone and chert--- -- _-__ -

Mudstone----- ---- - 

Mudstone----- - -- -- --- -

Mudstone, cherty ------- -- - -- - 

Mudstone, carbonatic; fos. col. no. 12564---

Mudstone, phosphatic - - ------- 

Mudstone--- - _- - - --

Mudstone, phosphatic; fos. col. no. 12663 

Sample 

no.

6196- RGW 

6195-RGW

61 94- RGW 

61 93- RGW

6192- RAS

6191- RAS 

6190- RAS

Thickness 

(feet)

1.0 

2.2

.7 

4.0 

4.5

.9 

1.0 

.6 

1.7 

4.6

3.5 

1.3 

.6 

2.4 

.7

1.7 

.8 

.7

Chemical analyses 

(percent)

P2°5

18.7 

4.75

15.0 

4.70

9.45

7.75 

17.6

Acid 

insoluble

38.6 

11.5

41.8 

24.8

64.0

66.9 

45.4

C

t

CO 

CO

Wells formation upper part only

Cw- 1 

Cw- 2 

Cw- 3 

Cw- 4 

Cw- 5

Cw- 6 

Cw- 7 

Cw- 8 

Cw- 9 

Cw-10

Cw-11 

Cw-12 

Cw-13 

Cw-14 

Cw-15

Mudstone --- -- - - -- - 

Mudstone; fos. col. no, 12562-- - -- 

Mudstone; fos. col. no. 12562 --- - 

Mudstone, carbonatic; fos. col. no. 12561 - 

Carbonate rock, argillaceous; fos. col. no. 

12561 

Mudstone, carbonatic 

Mudstone, carbonatic 

Mudstone ---- - 

Mudstone ------ --

Mudstone 

Mudstone - -- -- 

Mudstone, carbonatic - -- 

Carbonate rock, argillaceous 

Chert -- 

Mudstone, cherty---- --

6189- RAS

2.9 

1.0 

2.9

3.4

3.5

1.8

1.6

.7

.8

1.0

2.6 

1.8 

1.7 

1.4 

1.3

3.75 79.7

* Cumulative data incomplete because of missing information.