GEOLOGICAL SURVEY CIRCULAR 131

November 1951

EXPLORATORY DRILLING IN THE

PRAIRIE DU CHIEN GROUP OF THE

WISCONSIN ZINC-LEAD DISTRICT BY THE

U. S. GEOLOGICAL SURVEY IN 1949-1950

By 

Alien V. Heyl, Jr., Erwin J. Lyons, and Alien F. Agnew

Prepared in cooperation with the 

Wisconsin Geological and Natural History Survey
UNITED STATES DEPARTMENT OF THE INTERIOR

Oscar L. Chapman, Secretary

GEOLOGICAL SURVEY

W. E. Wrather, Director

Washington, D. C.

Free on application to the Geological Survey, Washington 25, D. C.
CONTENTS

Page

Abstract.......

Introduction ..... 

Historical data 

Objectives of project

Acknowledgments ... .......... 4

Geology .................... .4

General features ........... .4

Stratigraphy ............... .4

Sulfide deposits ............. 5

General Characteristics ..... .5

Sulfides in the Galena, Decorah,

and Flatteville formations .... 5 

Sullides in the St. Feter sandstone. 5 

Sulfides in the Frairie du Chien

group ............... 5

Sullides in the Trempealeau and

Franconia formations ...... 5

Fage

Exploratory work by the Geological 

Survey .................... 6

Problems of drilling . .......... 6

Diamond drilling .......... 6

Churn drilling ........... 6

Results ........... ....... 6

Crow Branch area ......... 8

Leix property. .... ....... 9

Farmiey Harris property . .... 9

Spitzbarth property. .... . . . . 9

Kennedy mine property ..... .9

James mine area ......... 11

Meekers Grove area. ....... 11

Vinegar Hill roaster property... 12

Conclusions .............. .12

Selected bibliography ............. 16

Descriptive records of drill holes ... ... 17

ILLUSTRATIONS

Fage

Figure 1. Index map showing outline of main productive area of the Upper Mississippi

Valley zinc -lead district and location of areas covered by detailed map of this report...... 2

2. Generalized stratigraphic section of the Upper Mississippi Valley zinc-lead district. . . . .... 3

3. Geologic map and location of drill holes in Crow Branch area near Livingston, Wis. ........ 7

4. Flan view and geologic map and cross section in the no%thwestern part of Crow Branch

area (fig. 3) ........................................... 8

5. Map showing workings of O. F. David mine and location of drill hole on Leix property

near Montfort, Wis.. ........................................ .10

6. Map showing location of drill holes on Spitzbarth and Harris properties near Mineral

Point, Wis, ............................................. 11

7. Map showing location of drill holes on Kennedy' mine property near Hazel Green, Wis. ..... 12

8. Map showing location of drill holes on James mine property near Shullsburg, Wis. ....... .13

9. Map showing location of drill holes on Raisbeck property, Meekers Grove area,- Wis. ...... 14

10. Map showing location of drill holes on Vinegar Hill roaster property near Cuba City, Wis. ... 15
EXPLORATORY DRILLING IN THE PRAIRIE DU CfflEN GROUP

OF THE WISCONSIN ZINC-LEAD DISTRICT BY THE

U. S. GEOLOGICAL SURVEY IN 1949-1950

%

Alien V. Heyl, Jr., Erwin J. Lyons, and Alien F. Agnew

ABSTRACT

The U. S. Geological Survey in cooperation 

with the Wisconsin Geological and Natural History 

Survey explored the Prairie du Chien group in the 

main productive area of the Wisconsin zinc-lead 

district during 1949-50. Eight properties--Crow 

Branch diggings, Leix, Harris, Spitzbarth, Kennedy, 

James, Raisbeck and Vinegar Hill Roaster were 

explored using both diamond and churn drills. 

Twenty holes were drilled that totaled 8,582 feet 

in depth. The objectives of the exploration were to 

determine if the Prairie du Chien and other formations below the principal ore-bearing strata (Galena, 

Decorah, and Platteville formations) of the district 

are favorable for ore deposits, and to determine the 

type of ore deposits, if present. Lean deposits of 

sphalerite, marcasite, and pyrite were found in the 

Prairie du Chien on five properties Crow Branch, 

Leix, Harris, Spitzbarth, and Vinegar Hill Roaster 

and also in the Franconia sandstone on the Leix 

property. In the drilled area the sulfides in the 

Prairie du Chien group occur in certain more brittle 

or soluble dolomite beds that contain cavities formed 

by brecciation or solution.

INTRODUCTION 

Historical data

The Upper Mississippi Valley zinc-lead district 

(fig. 1) is one of the oldest mining areas in the 

United States. As early as 1658 (Thwaites, 1895, 

p. 272) lead ore was known in the area, and continuous active mining began in 1823 (Bain, 1900, 

p. 3). From about 1830 to 1871 the district was 

by far the most important lead-producing area in 

the United States. Zinc ore was first recovered 

from the mines about 1859, and production subse - 

quently increased slowly. After 1902 more efficient mining and concentration methods were employed, and the production of zinc ore increased 

rapidly to a peak in 1917, when 64,000 tons of zinc 

metal was produced. The activity of this period 

of mining has not been surpassed, although the 

years 1922-29 and 1942-50 were also important 

periods of mining.

Practically all of the ore mined to date (1950) 

has been recovered from the Galena, Decorah, and 

Platteville formations (fig. 2), but numerous deposits 

of sulfides, most of which lie north of the main productive part of the zinc-lead district as outlined in 

figure 1, were found in the underlying Prairie du 

Chien group during the nineteenth century. Although 

these lead, zinc, and copper deposits in the Prairie 

du Chien have been little explored and developed, a 

few deposits have been mined on a small scale. The 

principal localities of former commercial mining 

are: Ohlerking diggings, sees. 31 and 32, T. 7 N. , 

R. 1 E. , 2 miles west of Highland, Wis.; Lansing 

lead mine, NWi sec. 10, T. 99 N., R. 4 W., 5 

miles northwest of Lansing, Iowa; and Demby-Weist 

mine area, N|N| sec. 29, NW* sec. 28, S| sec. 

21, and the NEi sec. 20, T. 7 N. , R. 4 E., about 

6 miles northeast of Dodgeville, Wis.

Galena was the principal ore mined in all of 

these places, but zinc ores also are present in the 

Demby-Weist mine area. Production statistics 

and information obtained locally indicate that mining 

was successful at these three places. Some of the 

geologists (Percival, 1855, p. 66; 1856, pp. 59, 63; 

Jenney,1893, pp. 211-212) who examined these and 

the other ore deposits in the Prairie du Chien group, 

considered the possibilities good for ore deposits in 

these beds within the main productive area of the 

district; but others (Hall and Whitney, 1862, pp. 

405-413; Chamberlin, 1882, pp. 554-560) very 

strongly opposed this view.

The drilling program described in this report 

was undertaken during 1949-50 because the results 

of the geologic study of the district in progress 

from 1942 to the present (1950) favor the view that 

deposits of zinc and lead exist in the Prairie du 

Chien group within the principal mineralized area 

"as suggested by Percival and Jenney.

Objectives of project

The objectives of the exploratory program of 

diamond drilling and churn drilling, by the U. S. 

Geological Survey in cooperation with the Wisconsin 

Geological and Natural History Survey, were to
Minneapolis

J

INDEX MAP SHOWING LOCATION OF MAP OF 

ZINC-LEAD DISTRICT OF WISCONSIN, ILLINOIS, 

AND IOWA

R6W R5W R4W R3W RZW RIW RIE R2E R3E R4E R5E R6E

Figure 1. -Index map showing outline of main productive area of the Upper Mississippi Valley zinclead district and location of areas covered by detailed map of this report
SILURIAN

z 

<

f «

ORDOVIC

1 |CAMBRIAN 

LOWER

fr 

Ul 

Q. 

Q.

I>

MIDDLE

LOWER

1 |UPPER 

NIAGARA DOLOMITE

MAQUOKETA SHALE

GALENA DOLOMITE

DECORAH FORMATION

PLATTEVILLE 

FORMATION

Dubuque sholy member

Stewortville massive 

member

Prosser cherty member

Ion dolomite member \

Guttenberg member y 

Spechts Ferry member \

Quimbys Mill member N 

McGregor member

Pecatonica member ^

Glen wood member /

ST PETER SANDSTONE

PRAIRIE 

DU 

CHIEN

GROUP

TREMP-i

EALEAU 

FORMATION

Shakopee dolomite

New Richmond sandstone

Oneota dolomite

Jordan sandstone member

St. Lawrence member

FRANCONIA SANDSTONE

/ /

o/ o X o

o / o / <

f / /

So/ o /

'<*/<*,

*S " X " 

 X / 

ii"1Fry^%tfi*7R J%

* <t * i tr-B ir

7 '-/ / S

/ / /

' / /

/ ~/L. ~£_ '

' 7 ^ " ». f. /. j

' f> / o 7 o j

/ 0 / O/ 0

>/"« /o/«

9/ OX «>/ C 

^-/^/ ^/~

o / oy «/<

' / ^ > f / / / /

i'1'i.'i'i.'i

^....^....^r.

: V.'V/'/.-':-'V:v^:V' :'.*:

*&*&T

^6^ :.\^x /£AV.-.-

/ y x x

/ ^ / x

X X X /

Xo/ /oy

/<=>/<>/ o/

/<*/ >/&/

/ /-/ s

/ / / s

 / "S /'

 S - s y^L-^

f^r^Ni^y-^y

 .^.-y'-v'.y.-t.i

/ 7 '

.^..^

il^w 

190'

I30't

33'

80'

110'

^40'±

^

60'i

70'i

50-75'

OtoZ^1

I85't

30'±

125'

115'

Dolomite, buff, cherry 

Dolomite, light-groy, sholy

Shale, blue-green, with 

thin limestone layers

Phosphatic fossil zone 

at base

Dolomite, yellow, thinbedded. shalv

Dolomite, buff, thick-bedded

Receptaculites in lower 

part

Dolomite, gray-buff, cherty 

Receptaculites near base

Dolomite,gray,argillaceous 

Limestone, pink, and 

carbonaceous sholej'oil rock" 

Shalejight green

Limestone, pink, and carbonaceous shale, glass rock 

Limestone,gray, thin-bedded 

Dolomite,gray-buff,thick-bedded

Shale,light green, sandy

Sandstone,white to brown

Dolomite, gray, locally cherty

Sandstone, white lenses

Dolomite, gray, locally 

cherty, shaly and sandy

Sandstone

Sandstone and dolomite

Sandstone

Figure 2. -Generalized stratigraphic section of the Upper Mississippi Valley zinc-lead district
learn if the Frairie du Chien group and other 

formations below the principal ore-bear ing strata 

of southwestern Wisconsin also are favorable for 

ore deposits and to determine the type of ore deposits, 

if present.

Small local deposits of sulfides in the Frairie 

du Chien group are widespread in its belt of outcrop 

to the north and northwest of the main productive 

area, and the lithology of the dolomitic beds suggested that these beds might contain deposits of 

zinc and lead ores at depth beneath the actively 

mined part of the district. The areas for special 

investigation were selected on the basis of especially 

favorable geologic structures or because of reported 

sulfides in wells that penetrated these lower strata.

Eight properties were explored by 20 drill holes 

that totaled 8, 582 feet of drilling. Lean deposits of sphalerite, marcasite, and pyrite were found in the Frairie 

du Chien group on five properties, and also in the 

Franconia sandstone on one property. The location 

of the properties that were drilled is shown (black 

areas) on the index map (fig. 1).

Acknowledgments

The geological study and drilling program was 

under the direct supervision of A. V. Heyl, Jr., 

E. J. Lyons, and A. F. Agnew. R. F. Crumpton, 

A. E. Flint, and J. H. Moor contributed materially 

to the success of the program by their assistance. 

W. F. Huleatt, Chief of the Physical Exploration 

Unit, was the Contracting Officer. D. C. Dixon 

was in charge of the operation of the diamond drills.

G. A. Apell of the U. S. Bureau of Mines gave 

valuable data and assistance on the technical details 

and operation of the drills.

GEOLOGY 

General Features

The Upper Mississippi Valley zinc-lead district 

is about 100 miles south of the main area of outcrop 

of the pre-Cambrian shield in Wisconsin. The ore 

deposits are in the northern fringe of Paleozoic 

sedimentary rocks that overlap this shield area. 

The regional strike throughout most of the district 

is N. 85° W., but in the western part it swings to 

N. 45° W. The regional dip is about 17 feet per 

mile toward the south-southwest. The rocks of the 

district have been folded into broad undulations as 

much as 200 feet in amplitude, and are cut by numerous minor reverse, normal, bedding-plane, and 

shear faults that generally have displacements from 

1 to 10 feet and a few faults that have large displacements.

Stratigraphy

The rocks exposed in the zinc-lead district 

are Silurian or older in age (fig. 2). The youngest 

strata, the Niagara dolomite crop out mainly

along the southern and western edges of the district, 

but they also cap a few isolated erosion outliers within 

it. Most of the outcrops throughout the district are 

Galena dolomite, but smaller and fewer exposures 

of the Decorah, the Flatteville, and St. Peter formations are common. The Frairie du Chien group is 

exposed in some of the deeper valleys and along the 

north and east margins of the district. The oldestrocks exposed in the.area--the Franconia and Trempealeau formations of late Cambrian age crop out 

only along the Wisconsin River. Rocks of the preCambrian basement have been encountered only in 

wells, at depths from 1,500 to 2,000 feet.

The formations of Cambrian age consist mostly 

of sandstone, in part shaly and dolomitic; however, 

the St. Lawreace member of the Trempealeau formation, as penetrated at Montfort, Wis., is a dolomite 

that contains a little quartz sand. These Cambrian 

strata apparently are overlain conformably by the 

Frairie du Chien group of Early Ordovician age.

The base of the Prairie du Chien group is a 

transition zone about 15 feet thick that consists of 

alternating sandstone, arenaceous dolomite, and 

dolomite beds. A persistent oolite layer is just 

above the transition zone and below a bed 2^ feet 

thick of algal dolomite. About 180 feet of gray to 

drab dolomite that weathers buff lies above the 

algal beds. The lower 40 feet of this dolomite is 

moderately thin- bedded; the upper 120 feet is thickbedded to massive. The dolomite contains a few 

quartz sand grains, local sand lenses and algal 

structures, and areas of glauconite. Vuggy areas 

are common. Small patches of chert occur throughout, and persistent chert bands are found toward the" 

top of the unit. Above the massive beds are 25-50 

feet of strata of variable lithology, which consists 

of sandstone lenses, shale, dolomite, dolomitic 

sandstone, chert, and cherty oolite layers. For the 

most part the beds are irregular and discontinuous. The 

most prominent feature of these strata is the large 

and abundant algal structures that, at least in part, 

cause the contact between the Frairie du Chien and 

overlying St. Peter sandstone to be uneven. The 

algal areas in particular are vuggy, although small 

solution cavities are common in all the dolomitic 

beds. Also in these algal areas is a tan to buff,, 

compact, calcareous dolomite in even beds from 2 

to 3 inches thick. The beds in places are very 

shaly and consist mostly of pale-green, gray, red, 

and maroon shale.

A disconformity of considerable relief marks 

the boundary between the Frairie du Chien group 

and the overlying St. Peter sandstone, and consequently the group varies greatly in thickness over 

a wide area. In the northern part of the district the 

maximum thickness of the Frairie du Chien is about 

220 feet; in the southern part the maximum thickness 

is about 260 feet. The disconformity is more marked 

toward the south.

The St. Peter sandstone, of Middle Ordovician 

age, ranges from 40 to 200 feet or more in thickness.
The lower beds of the St. Feter were deposited in 

the valleys within the unconformity surface. These 

beds consist of thin-bedded red, pink, and white, 

poorly-cemented sandstone with interbeds of red 

and green shale, dolomite, and limestone. The 

sand grains are well rounded and frosted but not 

well sorted. The upper part of the St. Feter sandstone is generally white, yellow, or brown, and 

consists of well-sorted, frosted, rounded quartz 

sand grains; it is thick- bedded and may be crossbedded on a large scale.

The stratigraphy of the beds above the St. 

Peter sandstone is shown in figure 2; more detailed 

descriptions are not given here because this report 

is primarily concerned with the strata and mineralization below the principal ore-bearing formations,

Sulfide deposits

General characteristics.--The ore deposits 

that have been mined in the district are mostly in 

the Galena, Decorah, and Flatteville formations. 

The principal primary minerals are quartz (chert 

and other forms of silica), dolomite, sphalerite, 

marcasite, pyri+e, galena, barite, chalcopyrite, 

and calcite, which were deposited throughout the 

district in this regular paragenetic sequence.

The ore-bearing solutions altered the host 

rocks within and in the immediate vicinity of the 

deposits by three processes: solution of the impure 

calcareous rocks, silicification, and dolomitization.

The ore deposits show both horizontal and 

vertical zoning. A northwest-trending zone passing 

through the east-central part of the district contains 

abnormally large quantities of copper, barium, and 

nickel. Local mines within this zone produced commercial quantities of barium and copper. On the 

fringes of the district, galena is the most abundant 

ore mineral, but in the central area, sphalerite is 

the most abundant ore mineral. A vertical zoning 

is represented by concentrations of galena near 

the surface, whereas sphalerite, pyrite and marcasite, 

quartz, dolomite, and possibly chalcopyrite are more 

abundant in the deeper deposits.

Sulfides in the Galena, Decorah, and Flatteville 

formations. --The principal ore deposits in the Galena, 

Decorah, and Flatteville formations can be classified 

according to their controlling fracture systems as 

reverse and bedding-plane fault type and joint type. 

Ore deposits of the first type are veins in faults and 

related fractures, which are along the flanks of 

folds. The vein minerals have been deposited as 

vein fillings along fractures and bedding planes, 

cavity fillings in solution and tectonic breccias, and 

disseminations by replacement and impregnation 

of favorable beds, particularly shaly layers: The 

joint-controlled deposits are limited to the Galena 

dolomite. In these deposits the chief mineral, galena, 

is deposited in gash veins that fill vertical joints, 

and in podlike bodies in favorable beds along the 

joints.

Sulfides in the St. Feter sandstone. - -Fyrite 

and marcasite are the principal Sulfides in the St. 

Feter sandstone and in the immediately overlying, 

thin, sandy Glenwood shale member of the Platteville formation. Locally, sphalerite and galena are 

present in small quantities. In general, the known 

sulfide deposits in the St. Feter sandstone are 

directly below large sulfide deposits in the overlying 

formations. The sulfides from the cement between 

the quartz sand grains and less commonly coat small 

fractures. In these areas of sulfide mineralization, 

secondary quartz generally has been deposited as 

silica cement and as crystal overgrowths on the 

quartz grains.

Sulfides in the Prairie du Chien group. The 

Prairie du Chien group to the north of the main productive area of the district contains many small 

deposits of sulfides of lead, copper, iron, and zinc; 

and'data from the Geological Survey exploration 

program indicate that within the main part of the 

district this group also contains sulfides of zinc 

and iron, but only traces of copper and lead. 

Considerable secondary silica and dolomite are 

present in nearly all of the mineral deposits, within 

the Prairie du Chien but calcite is uncommon. 

The known sulfide deposits in the Prairie du Chien 

are (1) veins or lodes along vertical joints or faults, 

and (2) mineralized zones of crackle and solution 

breccias, in places related to bedding-plane faults 

and shear zones. Replacements of the dolomite by 

pyrite and marcasite, and rarely by sphalerite, are 

not uncommon in the brecciated areas, and in one 

place sphalerite was deposited between the individual 

dolomite grains of a porous dolomite.

The sulfide deposits in the Frairie du Chien 

group at the Crow Branch, Leix, and Vinegar Hill 

areas lie directly beneath ore deposits in the overlying rocks. Elsewhere, though, as at the Ohlerking 

diggings at Highland, Wis., and the Harris and 

Spitzbarth properties near Mineral Point, Wis., the 

deposits are not known to lie beneath sulfide deposits, 

although ore bodies in the overlying strata are known, 

nearby.

Perhaps in the most distinctive feature of the 

deposits in the Frairie du Chien group is the 

abundance of secondary quartz. Not only does 

quartz (chert) replace large areas of the wall rocks, 

but also drusy quartz and chalcedony line vugs and 

fill fractures.

Sulfides in the Trempealeau and Franconia 

formations. The Trempealeau and Franconia 

formations in the Upper Mississippi district are 

exposed only in the deepest valleys along the Wisconsin and Mississippi Rivers north of main productive area of the district, and only a very few of 

the known lead and zinc deposits are in them. In 

two of these deposits the Lansing lead mine and the 

lead prospect near Dresbach, Minn., (Winchell, 1884, 

p. 258) galena is in veins along faults. Sphalerite, 

pyrite, and marcasite were found in the Franconia 

sandstone on the Leix property at Montforth, Wis.,
by the Geological^Survey drilling. The sulfides in 

these shaly sandstone beds occur between the quartz 

sand grains and are similar to the sulfides in the 

St: Feter sandstone deposits. "

EXPLORATORY WORK BY THE 

GEOLOGICAL SURVEY

Problems of drilling

The exploratory program of the Geological 

Survey consisted of both diamond and churn drilling. 

The churn drilling was technically more successful 

and considerably less expensive than diamond drilling.

Diamond drilling. --Three types of rocks-- 

sandstone, soft plastic shales, and porous cherts-- 

caused the chief difficulties in drilling. The pounding of the core barrel and rods, plus the current 

of the return water, removed large quantities of 

sand from the drilling hole walls in the parts of the 

St. Feter sandstone that consist of well-rounded 

grains of very loosely cemented quartz sand. 

As long as the water return was strong, this sand 

was washed out of the drill hole. If the return 

flow of water stopped, -either because of mechanical 

difficulties or because of cutting a permeable zone 

or fracture, the sand dropped to the bottom of the 

hole and quickly settled around the barrel and bit, 

completely binding it to the wall. In most cases 

sufficient water pressure could not be obtained to 

wash out the sand if it was wedged above the bit; if 

this sand was packed particularly tight, reverse 

drilling was impossible also. A very high-pressure 

flow of water and very careful checking of the water 

pressure by use of a gage on the drill was helpful. 

The pump that fed the water into the drill was always 

located nearby so that water pressure could be 

regulated quickly. The use of aquagel mud was 

helpful in some holes.

The soft plastic shales in the Frairie du 

Chien group, and in the basal part of the St. Feter 

sandstone, where it is thick, were drilled successfully 

by casing or cementing the hole immediately after 

drilling stopped at the end of the day before the hole 

could fill with shale. The use of small rather than 

large amounts of water helped decrease the swelling 

and heaving of the shale.

The cherts, where highly fractured and several 

feet thick, were difficult to drill. In some places 

several bits were worn out after penetrating only a 

few feet of chert, and therefore drilling was usually 

expensive.

An obvious advantage of diamond drilling is 

that cores provide considerably more information 

concerning lithology and mineral occurrence than 

do churn-drill cuttings. A disadvantage, however, 

is the poor recovery of core in highly fractured 

mineralized rocks; also, at best, the recovery of 

sludges was intermittent. NX bits gave the best 

core recovery.

The diamond drilling program has shown that 

successful penetration of the strata of this area 

requires extreme care in drilling sedimentary 

rocks. Moreover, a trained exploration engineer,

rather than a geologist, should be assigned to a 

diamond-drilling project to manage, technical 

problems. He should have full authority to make 

decisions as to the methods and time of casing, 

cementing, reaming, reduction of bit size, and 

abandonment of the drill hole.

Churn drilling--Fewer mechanical difficulties 

were encountered in churn drilling than in diamond 

drilling. The loosely consolidated layers of the 

St. Feter sandstone were drilled without much 

difficulty. Cherty portions of the dolomites caused 

considerable wearing of the bits, but because the 

cherts are brittle they were more easily shattered 

and drilled by this method. -Inclined fractures, 

particularly where the walls were indurated by 

silica, caused difficulties; the bit tended to follow 

the fracture and to become wedged. In one drill 

hole, blasting was necessary to shatter the hardened 

footwall of a fracture so that this wall could be 

penetrated by the drill bit.

The soft plastic shale that made core drilling 

difficult also constituted the main problem in churn 

drilling. Very slow drilling under light weight and 

a short stroke were helpful in penetrating these beds. 

Some holes through the shale beds had to be reamed 

and cased immediately after drilling, to prevent 

caving. Concentric casing was set in one drill hole 

where a second shale bed was cut below the first 

casing.

The large diameter of the churn-drill holes 

and the more consistent recovery of the cutting 

made the samples of mineralized rock more representative of the true rock content than the 

samples obtained by diamond drilling. However, 

the churn-drill cuttings do not retain nearly as 

many of the stratigraphic and ore-deposit characteristics; and self-salting in some of the drill holes 

made casing necessary.

The churn drilling proceeded much more 

rapidly and needed less supervision than the diamond 

drilling. This saving in manpower lowered considerably the total cost of exploration.

Results

Eight properties were drilled during the 

investigation. Five were selected because of known 

ore deposits in the Galena, Decor ah, and Platteville formations and because of favorable geologic 

structures. The other three properties (Leix, 

Spitzbarth, and Harris) were drilled to check 

reports that wells had cut some sphalerite 

mineralization in the Frairie du Chien group.

In the southern part of the Wisconsin district, 

the unconformity separating the St. Feter sandstone from the underlying Frairie du Chien group 

cuts so deeply into the Frairie du Chien on the 

James and Raisbeck properties, that only a small 

thickness of the dolomite remains. On the other 

properties the dolomite has not been thinned by 

erosion, and hence it is sufficiently thick to form 

the host rock for large lead and zinc deposits. On 

five of the properties drilled--Crow Branch, Leix, 

Vinegar Hill, Spitzbarth, and Harris--lean
Galena dolomite

HI

Decorgh formation

Platteville formation

St Peter sandstone

Area of shallow lead pits

Structure contours at base 

of "oil rock"member of Decorah formation, 

dashed where extrapolated 

Datum is mean sea If re/ 

i Mine «hoft 

3 "O^USGS 18 KJM.Jc.USGS 3

2 . Drill hole with zinc ore Drill hole without ore 

I IOI5.7'i?/»«/»/> af surface in feet afore JM/W

OUSSS 5A

Drill hale with lean zinc mineralization 

Other drill hole with zinc are Other drill hole without ore

K»9-elevatlM al surface in feet abort sen bnl

IOO+*et9Mt1o* in feet obevt sea level 

 of tiost of "ell net" 

Geologic contact approximately located or inferred *6

 -) Other drill hole with fair zinc mineralization

Syncline 

Show* truer a'nMplane

Strike and dip of beds

£3» 

Strike of vertical Joints

Other drill hole with k»<

X8.M Mil 7

Bench mark 

Barbed-wire fence

Elevation in feet above seo level at base 

of "oil rack* member of Decorah formation

Figure 3. -Geologic map and location of drill holes in Crow Branch area near Livingston
sphalerite, marcasite,and pyrite deposits were 

found in the Prairie du Chien. On the Kennedy 

property pyrite and marcasite were found in notable 

quantities in this formation. Sphalerite and pyrite 

were found also in the Franconia sandstone at the 

Leix property, where drilling penetrated a considerable thickness of the Cambrian beds. As was 

expected, zinc and lead sulfides in considerable 

quantities were found in the Galena, Decorah, and 

Flatteville strata in the Crow Branch, Kennedy, 

Leix, and Vinegar Hill areas. Logs of the holes 

drilled on these properties are listed at the end 

of the report.

Crow Branch area. --The major structural 

feature in the Crow Branch area (fig. 3) is a northwest-trending sycline that has an amplitude of about 

100 feet and is assymetric with a steeper southwest limb. The drill holes showed that the fold 

has the same magnitude at the top of the Cambrian 

beds as it does in the overlying Flatteville and 

Decorah strata (fig. 4).

The Crow Branch ore body lies along the 

lower part of the southwest steeper limb of the major 

syncline, and is known to be at least 3,100 feet in 

length and as much as 300 feet in width. The largest 

area of shallow lead pits (fig. 3) indicates the general 

lateral extent of the ore body where it is partly eroded 

or at shallow depth in Crow Branch Creek valley. 

The ore occurs in all the beds from the Frosser 

thirty member of the Galena dolomite downward 

into the McGregor limestone member of the Flatteville formation. The ore body was mined for lead 

ore during the nineteenth century, and while in 

operation, was described by several geologists

ST. PETER SANDSTONE .-,, 

USGS 5A _ .,'jjjl

^""PLATTEVILLE FORMATION

PLAN VIEW

USGS IB®

"US6S3A

USGSlO 

DECORAH FORMATION

GALENA

X DOLOMITE , j)_X,_ |A

<D USGS IB O USGS I ® USGS 2

Drill hole with zinc ore Drill hole without ore Drill hole with lean zinc mineralization

Shows elevation of surface in feet above sea level Shows elevation of surface in feet above sea level Shows elevation of surface in feet above sea level

ST PETER SANDSTONE 

| unconformity 1| ^ |j j, pyrmzed M^^i^

Ih* "Ih" -

~887.9-

PRAIRIE DU CHIEN GROUP

. 1| _______

|| Mineralized zones- ^ '' ' " : ""

694.2

0 100 200 

SCALE IN FEET

635.7

GALENA

DOLOMITE VIA'

^884.3

615.7

CROSS SECTION

Figure 4. -Flan view and geologic map and cross section in the northwestern part of Crow Branch

area (fig. 3)
(Fercival 1856, pp.-34-36, 47-48, 61-62; Hall and 

Whitney, 1862, pp. 361-364; Chamberlin 1882, p. 

481). It is controlled by several northwest-trending, 

southwest-dipping reverse faults (fig. 4) and associated bedding-plane faults.

The Crow Branch area was explored by 10 

Geological Survey drill holes, 3 of which (USGS 

1, 3, and 5) bottomed above the Frairie du Chien 

group, owing to mechanical difficulties encountered 

by the diamond drill. Seven of the Geological 

Survey drill holes are located along a line trending 

at nearly right angles to the trend of the major 

syncline in order to explore in the Frairie du Chien 

group for an extension at depth of the ore in the 

Galena, Decorah, and Flatteville formations (fig. 4). 

The drilling indicated that the southwest-dipping 

fault system that controls the ore body above the 

St. Feter sandstone apparently does not extend 

below the Flatte'ville formation. However, three 

mineralized zones were found that contain sphalerite, pyrite, and marcasite in the beds of the 

Frairie du Chien. These zones lie beneath and 

toward the northeast of the ore body in the Galena, 

Flatteville, and Decorah formations. The zones 

are apparently in the more brittle dolomite beds 

of the Frairie du Chien which have been fractured 

into a crackle breccia during the tectonic deformation that produced the folds and the over-lying unconnected faults. The undulations in the beds in 

the upper ore zone (fig. 4) at the top of the Flatteville formation are the result of solution thinning by 

the ore solutions and some faulting in these beds. 

Disregarding these local undulations, the dip of the 

lower beds closely corresponds to that of the upper 

beds. In one drill hole (USGS IB) a pyritized zone 

was found that contains a little sphalerite and galena. 

The two drill holes (fig. 3, USGS 6 and 7) were 

drilled at the southeast end of the Crow Branch ore 

body to see if the zinc-bearing zones of the Frairie 

du Chien extended along the trend of the ore body. 

No sphalerite was found, but instead considerable 

quantities of pyrite and marcasite were present.

Leix property. The single churn-drill hole 

on the Leix property (fig. 5) was put down to check 

reports of sphalerite in the Frairie du Chien group 

in the well drilled 60 feet to the south, in the middle 

of the railroad right-of-way, by the Chicago & 

North Western Railway in 1910.

In the U. S. Geological Survey drill holes 

(USGS 1), a little honey-yellow sphalerite was 

found in the lower part of the Frairie du Chien 

group at a depth of from 395 to 405 feet and the 

sphalerite is in the pores between the dolomite 

grains of the rock.

Disseminated sphalerite ore was cut in the 

Guttenberg limestone member of the Decorah 

formation, at 145-150 feet in depth. This ore is 

900 feet to the east of, and probably is on the 

extension of, the easterly heading of the abandoned 

C. F. David mine; its location therefore suggests 

that an unmined part of the ore body extends at 

least this far toward the east.

A third mineralized zone that contains considerable pyrite and a little sphalerite was found 

in the upper part of the Franconia sandstone, where 

the sulfides occur as cement between the quartz 

sand grains and are disseminated in the glauconitic 

green shales.

Farmley Harris property. A well on the 

Harris property (fig. 6) that was deepened in 1949 

struck considerable sphalerite and marcasite in the 

uppermost beds of the Frairie du Chien group. 

The first 2 feet of the deepened well were in greenish 

sandy shale at a depth of 170 to 172 feet and averaged 

0. 35 percent zinc and 3. 55 percent iron (analyst, 

Frank Walther, Flatteville, Wis. )--the iron in the 

form of pyrite and marcasite. The nearby Geological 

Survey hole (20 feet west of the well) drilled subsequently, found slightly smaller quantities of 

sphalerite, pyrite, and marcasite at about the same 

depth.

Spitzbarth property. A well drilled in 1900 

on the Spitzbarth property (fig. 6) was reported to 

have penetrated sphalerite in the upper beds of the 

Frairie du Chien group. A check hole was drilled 

by the Geological Survey within 20 feet of the old 

well; some sphalerite, pyrite, and marcasite were 

found in those beds at a depth of 100 to 105 feet. 

This sphalerite was in large crystals that apparently 

lined cavities in the rock, or replaced it.

Kennedy mine property. The Kennedy mine 

property (fig. 7) contains the large abandoned 

Kennedy mine, which is in one of the important 

northwest-trending ore bodies in the south-central 

part of the district. The ore body lies along the 

axial area of one of the larger northwest-trending 

synclines. Six holes were drilled along a line 

bearing southwest, at right angles to the general 

structural trend. Holes 3 and 3A were not completed, 

owing to diamond drilling difficulties, but hole 3B 

was completed very near the other two, by churn 

drilling. Hole 1, in the central area of the ore 

body, is between the two reverse fault zones that 

bound the ore body. This drill hole cut lean zinc 

and iron sulfide deposits in the beds above the 

St. Feter sandstone, and similar quantities of 

pyrite and marcasite in the basal part of the St. 

Feter sandstone and at two horizons in the lower 

part of the Frairie da Chien group. In the middle 

of the Frairie du Chien, from 355 to 368 feet in 

depth, the rock was entirely replaced by silica 

in the form of chert, drusy quartz, and jasperoid. This silicification was to a lesser 

extent in drill hole 2, at the western edge of 

the ore body, but not in the holes still farther 

southwestward.

Hole 2 penetrated 15 feet of mineable ore in 

the lower beds of the Decorah formation, and 

indicates that some unmined ore remains in the 

mine walls. Although no zinc was found in the 

Frairie du Chien beds, the considerable quantities 

of iron sulfide and the intense silicification indicate 

that mineralizing solutions passed through these beds.
R.IE.

US 18

).P DAVID 

'MINI

Buildings « 

 i

M. A. LEIX PROPERTY

USGS I,

Aiding

BuM liWing

30_ 

31

> Building

 Building

\

\

R.IE.

30

31

US 18

_ 

32

EXPLANATION

Mine workings

H»8£USGS I

Drill hole with zinc ore 

Shows elevation of surface 

. In feet above sea level

Barbed-wiie fence

9. .

lOOOFtet

Compiled by U.S. Geological Survey from 

mine map by New Jersey Zinc Co., 

aerial photos and original Surveys, 1950

Figure 5. -Map showing workings of O. F. David mine and location of drill holes on Leix property

near Montfort, Wis.

10
""OuSGS I 

DrM hole with Icon zinc

nvnerofizotion 

Shows e/evotiat of surface 

in feet above sea level

Compiled by U S Geological Survey, from 

aerial photos and original Surveys,l950

Figure 6. -Map showing location of drill holes on Spitzbarth and Harris properties near Mineral

Point, Wis.

The unconformity at the base of the St. Peter 

sandstone is fairly well marked here, and the 

lithology of the Prairie du Chien strata changes 

rapidly laterally. In some places, as in hole 1, 

the rock is nearly all dolomite; in others, as in 

hole 4, it is largely red and green shales interbedded with dolomite.

James mine area. One diamond drill hole 

was completed in the James mine area (Thomas 

Doyle property) near Shullsburg, Wis. (fig. 8). 

This drill hole penetrated an unusually great 

thickness (276 feet) of St. Peter sandstone and a 

small thickness of Prairie du Chien group so 

additional contemplated drill holes were not started. 

In addition to being thicker than normal the St. 

Peter sandstone in this drill hole has an unuslal 

lithology, particularly the lower 110 feet that

11

consist of thin beds of red, brown, yellow, and 

white sandstones interbedded with red and green 

shales, and a little limestone and dolomite. The 

exact stratigraphic age and relationships of these 

lower beds are not known. They are strongly 

sheared, slickensided, and full of small drag folds.

Meekers Grove area. Three churn-drill 

holes were put down on the Raisbeck property 

just south of Meeker s Grove, Wis. (fig. 9). These 

holes are located 'on a line bearing north-northeast 

across the steeper north limb of a major anticline 

of about 200 feet amplitude that trends east. (Heyl 

and others, 1945). All of these holes cut very thick 

St. Peter sandstone including considerable thicknesses of the unusual red and green shale and sandstone beds similar to those in the James mine drill 

hole. The only sulfides found in these holes were
Reverse fault showing dip Drill hole with lean zinc mineralizatlor 

Snows elevation of surface la feet above sea ,

Vertical Inclined 

Mine shaft

Outline of mine tailings dump

'"" USGS i

Drill hale with znc ore 

Shoirs elevation of surface in feet above sea level

>°«OUSGSS 

Drill hole without ore 

Slams elevation of surface In feet above sea /ere/

liilin,,. 

ukjge drift '*,.;

KENNEDY MINE

\

mpiled by U S. Geological Survey from mine mops of New Jersey Zinc Co, 

rial photos, end originol surveys, 1950

Figure 7. -Map showing location of drill holes on Kennedy mine property near Hazel Green, Wis.

considerable pyrite and a little galena in the upper 

part of the St. Feter sandstone in holes 1 and 2, 

and abundant iron sulfide in the Galena and Decorah 

formation in hole 3.

Vinegar Hill roaster property. Although the 

U. S. Geological Survey drilling in the southcentral part of the district has been unfavorable, 

owing to the unconformity at the top of the Prairie 

du Chien group that here cuts out most of this 

group in several known places, one hole was 

drilled on the property of the Vinegar Hill Zinc Co. 

(fig. 10) where previous drilling by that company 

had indicated that normal dolomitic Frairie du 

Chein strata were present; Also, older drilling 

had located an ore body in the Galena and Decorah 

beds along an east-trending syncline.

The Geological Survey drill hole was placed 

within the area of this ore body, and considerable 

iron and zinc sulfides were penetrated in the Galena 

and Decorah formations. Fractured dolomite of the 

Frairie du Chien group, in which a little coarsely 

crystalline sphalerite and marcasite coated the 

fracture walls, was cut from depths of 445 to 455. 

A little sphalerite was found along the uppermost 

part of the sandstone of Cambrian age,

Conclusions

Although no minable ore was found in the 

beds beneath the Flatteville formation, the Geological Survey drilling program showed that the 

dolomite beds of the Frairie du Chien group, where 

present throughout the mining district, are favorable

12
Compiled by U.S. Geological Survey 

from oeriol pholot ond origin'' 

surveys, 1950

Figure 8. -Map showing location of drill holes on James mine property near Shullsburg, Wis.

at several horizons for sulfide deposits. To date 

the sulfide deposits in the Prairie du Chien are all 

very low in grade and consist mainly of sphalerite, 

marcasite, and pyrite; and they are unlike the 

galena and chalcopyrite deposits that are prevalent 

in these rocks to the north of the- main productive 

area.

The northern part of the main productive 

area of the mining district is considered more 

favorable for the occurrence of ore deposits in the 

Frairie du Chien group than the southern part. 

The drilling indicates that in many places within 

the southern part of the district the Frairie du 

Chien is considerably thinned by pre-St. Feter 

erosion, now represented by the unconformity 

separating the St. Feter sandstone and the underlying Frairie du Chien. In the northern part of the 

mining district on the other hand, the Frairie du 13

Chien is 200 feet or more in thickness, except 

locally where erosion channels formed by pre-St. 

Feter erosion are known. Because the Frairie du 

Chien group is generally much thicker in the northern 

part of the district, and hence is here represented 

by a greater thickness of dolomite, the writers 

believe that this area is more favorable for the 

occurrence of zinc-lead deposits of possible commercial importance.

In some places, as in the Crow Branch, 

Kennedy, Leix, and Vinegar Hill roaster areas, the 

deeper sulfide deposits lie almost directly beneath 

the deposits in the Galena, Decorah, and Flatteville 

formations.

In the areas drilled, the sulfides in the Frairie 

du Chien group were deposited in certain more brittle or soluble dolomite beds in which cavities were
Drill hole without ore

Slto*s tkmtion of turfoct

in fnl about sta

Compiled by U.S. Geological Survey from mine inapt, 

aerial photos and original survey!, 1950

Figure 9. -Map showing location of drill holes on Raisbeck property, Meekers Grove area, Wis.

14
959.5QI8

994.

959.3

x-S

959.3

985.30

.60. 

OUrhote

OMho"

BFORCITE SHAFT

HO.. VINEGAR

32

R.IE.

WILKINSON LEASE

965.5Q4

9S8.00I

937.9*7 0?

935.6Q5

940.9*2

HILL ROASTER PROPERTY

R.IE.

Compiled by U.S. Geological Survey from mops of the 

Vinegar HMI Zinc Co. and original *urv«y>, 1950

Figure 10. -Map showing location of drill holes on Vinegar Hill roaster property near Cub
formed by brecciation or solution. The sulfides 

are in laterally extending brecciated or vuggy zones 

rather than along distinct vertical fractures or replacement areas. Abundant silica and dolomite are 

deposited with the sulfides. In many respects 

this type of sulfide deposit is similar to that found 

in the Joplin, Mo., mining district.

At Crow Branch the drilling indicated that 

the large folds, at least, are not limited to the 

the Middle Crdovician beds but are equally well 

developed in the underlying formations.

The drill hole that penetrated a considerable 

thickness of the upper part of the Cambrian strata 

on the Leix property showed that some of these 

beds are also favorable for sulfide deposits.

A by-product result of the drilling program 

of the Frairie du Chien group was the discovery 

of additional ore in the Galena, Decorah and Flatteville formations on three of these properties, the 

Crow Branch, Leix, and Kennedy. These ore 

discoveries are small contributions to the known 

ore reserves of the Wisconsin district.

SELECTED BIBLIOGRAPHY

Bain, H. F., 1906, Zinc and lead deposits of the Upper Mississippi Valley: U. S. Geological Survey Bull.

294, p. 3.

Chamberlin, T. C. , 1882, Geology of Wisconsin: Wisconsin Geol, Survey, vcl. 4, pp. 481, 511-517, 554-560. 

Hall, James, and Whitney, J. D., 1862, Report on the Geological Survey of the State of Wisconsin: Wisconsin

Geol. Survey, vol. 1, pp. 361-364, 405-413. 

Heyl, A. V., Jr., Agnew, A. F., and Behre, C. H. , Jr. , 1945, Zinc deposits of the Meekers Grove (Jenkinsville) area of the Wisconsin zinc-lead district: U. S. Geol. Survey preliminary rept., 6 pp. 

Heyl, A. V., Jr. , Agnew, A. F., Behre, C. H. , Jr. , and Lyons. E. J. , 1848, Zinc-lead deposits of the Hazel

Green-Shullsburg area, Lafayette and Grant Counties, Wisconsin: U. S. Geol. Survey Strategic Minerals

In vs. Prelim. Rept. 3-216, 11 pp. 

Heyl, A. V. , Jr. , Lyons, E. J. , and Agnew, A. F. , 1948, Geologic structure map of the Potosi lead-zinc area,

Grant County, Wisconsin: U. S. Geol. Survey Strategic Minerals Invs. Prelim. Map 3-221, 

Heyl, A. V. , Jr., Lyons, E. J. , and Thieler, J. J, , 1950, Lead-zinc deposits of the Beetown area, Grant

County, Wis.: U. S. Geol. Survey Minerals Invs. Field Studies (In preparation). 

Jenney, W. P. , 1894, The lead and zinc deposits of the Mississippi Valley: Am, Inst. Min. Eng. Trans.,

vol. 22, pp. 211-212.

Percival, J. G., 1855, Annual report of the Geological Survey of Wisconsin, Madison, p. 66. 

 1856, 2d annual report of the Geological Survey of Wisconsin, Madison, pp. 34-36, 47-48,

59, 61-63. 

Thwaites, R. G., 1895, Notes on early lead mining in the Fever (Galena) River region: Wisconsin Hist. Coll. ,

vol. 13, p. 272. 

Winchell, N. H., 1884, Geology of Minnesota, in The Geological and natural history survey of Minnesota,

Minneapolis, vol. 1, p. 258.

16
DESCRIPTIVE RECORDS OF DRILL HOLES

All drill holes are at 90° inclination. All percentages in long descriptions are estimates in terms of the 

metal content, i. e. galena percent means 1 percent lead in the sample.

CROW BRANCH AREA 

Crow Branch no. 1 (Diamond Drill Log)

Location: 1281 ft N. 37°15' E. of southeast corner sec. 22, T. 5 N., R. 1 W.

Date begun: 7/2/49 Elevation collar: 1016. 3 ft

Date completed: 7/5/49 Total depth: 132+ ft

Water table: not reached Driller: Frank Balcar

Footage

From

0

5.4

7.2

20.2

25.4

28.6

60.6

79.4

81.6

To

5.4

7.2

20.2

25.4

28.6

60.6

79.4

81.6

132+

Unit

Decorah-(Ion)

Decor ah - (Guttenber g)

Decorah-(Spechts Ferry)

Platte ville -(Quimbys Mill)

Flatteville-(McGregor)

Flatteville-(Fecatonica)

Platte ville - (Glenwood)

St. Feter

Description

Surficial, residual.

Limestone, gray; dolomite, buff.

Limestone, buff; shale, brown, trace pyrite.

Limestone, gray, argillaceous.

Limestone, buff; shale, brown.

Limestone, gray.

Limestone, buff.

Shale, green, sandy; trace pyrite.

Sandstone, trace pyrite.

Location: 1236 ft N. 21°30' 

Date begun: 9/6/49 

Date completed: 9/13/49 

Water table struck: 9 ft

Crow Branch no. IB

E. of southeast corner sec. 22, T. 5 N., R. 1 W.

Elevation collar: 1015. 7 ft 

Total depth: 380 ft 

Driller: Gille Bros.

Churn Drill Log

Footage

From

0

9

17

20

23

52

71

73

115

200

370

To

9

17

20

23

52

71

73

115

200

370

380

Formation

Decorah-(Ion)

Decorah - (G uttenber g)

Decorah-(Spechts Ferry)

Flatte ville -(Quimbys Mill)

Flatte ville - (McGregor)

Flatte ville - (Fecatonica)

Flatte ville -(Glenwood)

St. Feter

Frairie du Chien

Frairie du Chien

Trempealeau-(Jordan)

Description

Dolomite, gray and blue, mottled; littlesphalerite, pyrite,

marcasite, barite, calcite and trace of galena.

Dolomite, pink, dense. Mineralization same.

Limestone, gray, argillaceous, fossiliferous; with phosphate

nodules; mineralization same.

Dolomite, gray-brown, dense; mineralization same.

Dolomite, buff and gray; mineralization same but decreasing

with depth.

Dolomite, bluish-gray, argillaceous; marcasite, pyrite,

sphalerite; phosphate nodules 68-70.

Shale, green, sandy, with pyrite, marcasite, and phosphate

nodules; trace barite.

Sandstone, medium-large grained; sphalerite 75-95; pyrite

and marcasite; little barite; trace galena 80-85.

Dolomite, light-gray to buff; trace pyrite and marcasite; gray

green shale; oolite 125-130, 135-140, 145,- 170; glauconite

125-130, 195-200; cherty, little green shale.

Dolomite, same; cherty; sphalerite 200-210. 220-340, pyrite

and marcasite; trace chalcopyrite 250-26&; several sandy

zones; trace green shale, trace glauconite.

Sandstone, colorless, rounded grains; trace pyrite and

marcasite.

17
Analyses 2/

Feet

From

0

15

20

25

30

35

40

45

47.5

50

52.5

55

57.5

60

62.5

65

67.5

70

72.5

75

80

175

200

205

230

235

240

245

250

255

260

285

290

295

300

To

15

20

25

30

35

40

45

47.5

50

52.5

55

57.5

60

62.5

65

67.5

70

72.5

75

80

85

180

205

210

235 .

240

245

250

255

260

265

290

295

300

305

Zn

2.' 10

2.20

5.50

4.70

4.90

3.20

1.75

.80

2.30

.20

.15

.10

.05

.05

,20

.05

____

.25

.05

.75

.10

.05

Tr.

Tr.

.35

Tr.

.25

.10

.25

,10

.20

Tr.

Fe

4. 10

4.60

7.80

9.30

10.00

5.90

4.50

4.60

3.25

4.25

1.85

1.90

6.25

2.90

2. 15

1.70

2.25

4.00

6.00

1.80

1.65

1.75

1.75

1.10

1.15

.95

.75

1.05

1.05

1.10

.90

.75

.55

.90

1.00

Fb

0.45

.30 *

1.15

.40

.65

.15

Tr.

.05

.73

 

 

 

 

 

 

 

 

Tr.

 

 

 

 

 

 

 

____

2/ All analysis in the descriptive logs of drill holes are by 

Frank Walther, analyst, Flatteville, Wis.

Crow Branch no. 2

Location: 1123 ft N. 21°30' E. of SE corner sec. 22, T. 5 N., R. 1 W.

Date begun: 9/12/49 Elevation collar: 1012.3ft

Date completed: 9/21/49 Total depth: 365 ft

Water table struck: 10 ft Driller: Judd and Co.

Churn Drill Log

Footage

From

0

15

17.5

29

51

53

104

To

15

17.5

29

51

53

104

140

Unit

Flatteville-(Quimbys Mill)

Flatteville-(McGregor)

Flatteville -(Pecatonica)

Flatteville -(Glenwood)

St. Feter

Prairie du Chien

Description

Residual soil and yellow-buff dolomite, oxidized; pyrite and

limonite abundant; little barite, calcite; trace galena.

Dolomite,' yellow-buff, dense; brown shale; pyrite, limonite;

calcite, considerable galena and sphalerite; trace barite.

Limestone, light -gray; mineralization same; gray shale 28-29'.

Dolomite, gray, mottled; trace sphalerite at 40-45; galena,

considerable pyrite and marcasite.

Shale, green, phosphatic, sandy. Little galena, considerable

pyrite.

Sandstone, large, rounded, grains; trace of pyrite and

marcasite; occasional green shale and calcite; all oxidized.

Dolomite, buff and -gray; cherty; oolite 115-120, 125-130,

little sphalerite 105-110, 130-135, trace pyrite, marcasite

and glauconite.

18
Churn Drill Log-Continued.

Footaae

From

140

165

170

347

To

165

170

347

365

Unit

Frairie du Chien

Frairie du Chien

Frairie du Chien

Trempealeau-(Jordan)

Description

Sandstone and dolomite, buff-tan; trace glauconite, cherty

oolite, green shale, marcasite and pyrite.

Quartz and oolite; trace pyrite, marcasite, and glauconite.

Dolomite, buff, light -gray and pink, with quartz; marcasite

and pyrite, trace-fair; trace glauconite, green shale;

occasional oolites.

Sandstone; trace pyrite and marcasite.

Analyses

F( 

From

15

17.5

20

23

28

30

35

40

45

50

105

130

3et

To

17.5

20

23

28

30

35

40

45

50

52.5

110

135

Zn

0.30

.25

.15

.05

 

 

____

 

.10

Fe

6.90

9.90

5.90

3.25

3.70

4.20

4.05

4.60

4.80

4.25

1.10

1.75

Fb

1.40

2.35

1.20

.40

.15

.90

.95

.45

----

Crow Branch no. 3 (Diamond Drill Log)

Location: 1044 ft N. 17°30' E. of southeast corner sec. 22, T. 5 N., R. 1 W.

Date begun: 7/2/49 Elevation collar: 1008. 9 ft

Date completed: 7/26/49 Total depth: 121. 2 ft

Water table: not reached Driller: Frank Balcar

Footage

From

0

11.2

20.0

39.0

41.0

To

11.2

20.0

39.0

41.0

121.2

Unit

Flatteville-(McGregor)

Flatteville-(Pecatonica)

Flatte ville -(Glenwood)

St. Feter

Description

Surficial.

Limestone, gray.

Limestone, buff.

Shale, green, sandy,

Sandstone, yellow to

trace pyrite.

white.

Crow Branch no. 3A

Location: 1287 ft N. 35°15' E. of southeast corner sec. 22, T. 5 N., R. 1 W. 

Date begun: 9/21/49 

Date completed: 9/29/49 

Water table struck: 9 ft

Elevation collar: 1020.1 ft. 

Total depth: 405 ft 

Driller: Judd and Co.

Churn Drill Log

Footage

From

0 

10 

15

28 

31

To

10 

15 

28

31 

35

Unit

Decorah-(Ion) 

Decorah-(Ion) 

Decorah-(Guttenberg)

Decorah-(Spechts Ferry) 

Flatteville-(Quimbys Mill)

Description

Dolomite, yellow-buff, oxidized. Trace pyrite. 

Dolomite, blue -gray; trace pyrite. 

Limestone, light -tan, dense; trace pyrite, green and brown 

shale.

Limestone, buff, fossiliferous, phosphatic; gray shale, trace 

pyrite. 

Limestone, dark-brown, dense; trace calcite, pyrite, gray 

shale.

19
Churn Drill Log-Continued.

Footage

From

35 

65 

82

85

141 

144

378

To

65 

82 

85

141

144 

378

385

Unit

Flatteville-(McGregor) 

Flatteville-(Fecatonica) 

Flatteville-(Glenwood)

St. Feter

St. Feter 

Frairie du Chien

Jordan

Description

Limestone, light-gray, buff; trace pyrite. 

Dolomite, gray; trace pyrite and calcite. 

Shale, green, phosphatic, with pyrite and sand grains; trace 

galena. 

Sandstone, large rounded, colorless grains; pyrite trace -fair; 

trace green shale. 

Shale, green, sandy. 

Dolomite, buff; trace glauconite and green shale; occasional 

. quartz and cherty zones with oolite; sphalerite 190-197. 5

200-220, 250-260, 275-315, 350-380; pyrite and marcasite

trace-little; sandstone 255-270. 

Sandstone, small to large grains; trace green shale, pyrite 

and marcasite.

Analyses

r'eet

From

80

190

195

197.5

200

202.5

205

207.5

210

212.5

215

217.5

250

255

257.5

275

285

290

295

300

310

365

370

To

85

195

197.5

200

202.5

205

207.5

210

212.5

215

217.5

220

255

257.5

260

280

290

295

300

305

315

370

375

Zn

....

0.50

.25

____

. 10

. 10

.20

.15

.10

.25

.05

.05

.05

. 15

.07

.05

.07

.65

.12

.08

.05

Tr.

----

Fe

3.25

.85

1.00

.85

1.00

1.00

.90

.55

.75

.95

1.05

1.10

.85

.90

.85

.75

.55

.80

.65

.80

.80

1.05

.95

Fb

Tr.

___

___

___

___

___

...

___

___

-_-

...

 i--

___

___

---

Crow Branch no, 4 (Churn Drill Log)

Location: 1105 ft N. 1°30' E. southeast corner sec. 22, T. 

Date begun: 9/5/49 

Date completed: 9/12/49 

Water table struck: 93 ft

5 N. , R. 1 W. 

Elevation collar: 1003. 2 ft 

Total depth: 320 ft 

Driller: Judd and Co.

Footage

From

0

13

18

22

65

69

To

13

18

22

65

69

302

Unit

Flatteville-(Fecatonica)

Flatte ville -(Glenwood)

St. Feter

St. Feter

Frairie du Chien

Description

Soil and stream gravel; placer barite, galena, pyrite and

limonite.

Dolomite, gray and buff.

Shale, green, with pyritized sandstone.

Sandstone, clear, rounded, large grains, oxidized; trace

pyrite.

Shale, gray-green, with sand grains, glauconite and pyrite.

Dolomite, light-tan, gray, and buff, cherty; trace glauconite

shale, pyrite, marcasite; trace chalcopyrite 135-160; a few

oolite and sandstone zones; considerable quartz.

20
Crow Branch no. 4 (Churn Drill Log)-Continued.

Footage

From

302

To

320

Unit

Jordan

Description

Sandstone, 

limonite,

medium-grained, friable, oxidized. Trace oolite, 

pyrite, brown and green shale.

Crow Branch no. 5 (Diamond Drill Log)

Location: 1845 ft N. 60°30' W. of southeast corner sec. 22, T. 5 N., R. 1 W.

Date begun: 7/2/49 Elevation collar: 998. 7

Date completed: 7/5/49 Total depth: 76. 2

Water table: not reached Driller: Frank Balcar

Footage

From

0

12.4

63.7

74.2

To

12.4

63.7

74.2

76.2

Unit

St. Feter

St. Feter

Frairie du Chien

Description

Surficial.

Sandstone, white to brown.

Shale, green.

Dolomite, buff; trace pyrite.

Crow Branch no. 5A (Diamond Drill Log)

Location: 1830 ft N. 61° W.

Date begun: 7/15/49 

Date completed: 8/4/49 

Water table: not reached

of southeast corner sec. 22, T. 5 N. , R. 1 W.

Elevation collar: 997. 8 ft 

Total depth: 303. 6 ft 

Driller: Frank Balcar

Footage

From

0

9

60.6

63.3

105.5

154.0

218.0

281.5

287.2

To

9

60.6

63.3

105.5

154.0

218.0

281.5

287.2

303.6

. Formation

St. Feter

St. Feter

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Trempealeau-(Jordan)

Trempealeau-( Jordan)

Description

Surficial.

Sandstone.

Shale, green.

Dolomite, buff, cherty; trace pyrite, marcasite.

Dolomite, gray, chert and drusy quartz; marcasite, pyrite in

vugs and fractures.

Dolomite, varicolored; marcasite, pyrite.

Dolomite, tan; marcasite.

Sandstone; dolomite, green shale streaks; trace marcasite.

Sandstone, brown dolomite, pink; trace marcasite.

Crow Branch no. 6 (Churn DriirLog)

Location: 1882 ft S. 62° E.

Date begun: 9/15/49 

Date completed: 9/22/49 

Water table struck: 70 ft

of southeast corner sec. 22, T. 5 N. , R. 1 W. 

Elevation collar: 1134. 8 ft 

Total depth: 450 ft 

Driller: Gille Bros.

Footage

From To Unit Description

0

10

35

60

78

98

109

111

113

125

130

140

10

35

60

78

98

109

111

113

125

130

140

155

Galena

Galena

Galena

Decorah-(Ion)

Decorah-(Guttenberg)

Decorah-(Spechts Ferry)

Flatte ville-(Quimbys Mill)

Flatte ville - (McGr egor)

Platte ville-(McGregor)

Platteville-(McGregor)

Flatte ville-(Fecatonica)

Surficial deposits.

Dolomite, buff, cherty; trace limonite.

Dolomite, buff, cherty; limonite-10 percent Fe.

Dolomite, buff, cherty; trace limonite-marcasite.

Dolomite, gray; pyrite, marcasite.

Dolomite, brown; shale, brown; pyrite common.

Shale, green.

Dolomite, brown; shale, brown; pyrite common.

Dolomite, gray; pyrite and marcasite common.

Limestone, gray; pyrite and marcasite.

Dolomite, gray; trace pyrite. 

Dolomite, gray-brown; trace pyrite and marcasite.

21
Crow Branch no. 6 (Churn Drill Log)-Continued.

Footage

From

155

160

197

215

290

395

425

430

To

160

197

215

290

395

425

430

450

Unit

Flatteville-(Glenwood)

St. Feter

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Trempealeau-( Jordan)

Description

Shale, green, sandy; pyrite common.

Sandstone; trace pyrite.

Dolomite, buff to gray; trace pyrite.

Dolomite, buff to gray, shale, olive, sandy, trace pyrite.

Dolomite, cream; cherty; little pyrite.

Dolomite, silicified, cherty; green shale; trace pyrite.

Dolomite brown; oolite; trace pyrite.

Sandstone; brown sandy dolomite; trace pyrite.

Crow Branch no. 7 (Churn Drill Log)

Location: 2030 ft S. 

Date begun: 2/9/50 

Date completed: 2/22/50 

Water table struck: 60 ft

63°30' E. of southeast corner sec. 22, T. 5 N. , R. 1 W. 

Elevation collar: 1117 ft 

Total depth: 470 ft 

Driller: Gille Bros.

Footage

From

0

15

86

100

105

112

115

116

135

140

157

160

233

270

280

310

330

380

395

459

To

15

86

100

105

112

115

116

130

140

157

160

233

270

280

310

330

380

395

459

470

Unit

Galena

Decorah-(Ion)

Decorah-(Ion)

Decor ah- (Guttenberg)

Decor ah- (Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatteville-(McGregor)

Flatte ville - (McGr egor )

Flatteville-(Fecatonica)

Flatteville-(Glenwood)

St. Feter

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Trempealeau-( Jordan)

Description

Residual Soil.

Dolomite, yellow-buff, oxidized, cherty. Little limonite.

Dolomite, light-gray; pyrite and marcasite 4-15 percent.

Dolomite, blue; pyrite and marcasite 20 percent.

Shale, and dolomite; pyrite and marcasite 2-8 percent.

Shale, with phosphate nodules; pyrite and marcasite.

Dolomite, tan, sugary.

Shale, blue; pyrite and marcasite 1 percent.

Dolomite, blue-gray.

Dolomite, blue-gray; pyrite and marcasite 0. 2-2 percent.

Shale, green, sandy, phosphatic; pyrite and marcasite 3

percent.

Sandstone, large to small, rounded, color less -frosted quartz

grains. Little pyrite and marcasite.

Dolomitic sandstone and dolomite; trace oolite, green shale,

pyrite and marcasite.

Sandstone, fine-large, rounded, colorless-frosted quartz

grains.

Dolomite, light-buff to buff; cherty; occasional glauconitic

and green shale. Dolomitic sandstone 305-310; Little pyrite

and marcasite 300-310.

Dolomite, pink and buff. Occasional oolites. Little pyrite,

marcasite, and green shale.

Dolomite, light-tan, buff, and pink; some sandstone 330-335,

340-345, 365-370. Fyrite and marcasite 0. 4-4 percent,

trace chalcopyrite 370-375. Occasional trace of green

shale.

Dolomite, buff. Little pyrite and marcasite. Dolomitic sandstone and shale 390-395. Little pyrite and marcasite.

Dolomite, tan, pink, and buff, with scattered sand grains;

some sandstone stringers. Trace pyrite, marcasite, and

green shale. Quartz and cherty oolite 445-455.

Sandstone, fine to large, colorless-frosted, quartz grains.

Trace pyrite and marcasite.

22
LEIX PROPERTY 

Leix no. 1

Location: -242 ft north and 265 feet west of southeast corner sec. 30, T. 6 N., R. 1 E., Leix property, Montfort,

Wisconsin.

Date begun: 1/7/50 Elevation collar: 1197. 7 ft 

Date completed: 2/3/50 Total depth: 685 ft 

Water table struck: 60 ft Driller: Gille Bros.

Churn Drill Log

Footage

From

0

5

25

70

81

100

125

135

140

149

154

155

160

170

178

195

198

249

251

280

300

310

315

380

415

466

495

545

590

607

To

5

25

70

81

100

125

135

140

149

154

155

160

170

178

195

198

249

251

280

300

310

315

380

415

466

495

545

590

607

625

Unit

Galena

Galena

Galena

Galena

Galena

Decorah-(Ion)

Decorah-(Ion)

Decor ah- (G uttenber g)

Decorah-(Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatteville -(McGregor)

Flatteville -(McGregor)

Flatteville -(McGregor)

Flatteville -(Fecatonica)

Flatteville -(Glenwood)

St. Feter

St. Feter

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Trempealeau-(Jordan)

Trempealeau

Trempealeau

Franconia

Franconia

Description

Soil.

Dolomite, yellow-buff; trace pyrite; trace sphalerite 15-20.

Dolomite, yellow-buff; chert fair to common.

Dolomite, buff; trace pyrite and marcasite.

Dolomite, yellow-buff; chert fair amount to common; trace

barite 90-95; trace pyrite and marcasite 81-85; trace

pyrite 95-100.

Dolomite, yellow-buff; chert abundant 100-115, little 115-125.

Dolomite, buff and gray; trace pyrite and marcasite.

Shale, gray-green; trace calcite, phosphate nodulas; marcasite

and pyrite.

Dolomite, tan and brown; phosphate nodules; trace chert and

quartz; little brown shale; sphalerite abundant; 140- 150;

heavy pyrite.

Limestone; light-buff; fair sphalerite 150-154; phosphate

nodules; gray shale.

Shale and dolomite, chocolate brown; fair sphalerite 154-155.

Dolomite, gray; little sphalerite, marcasite and pyrite; trace

calcite.

Limestone; light-gray, argillaceous; trace sphalerite and

pyrite.

Limestone, light -gray to tan, argillaceous; calcite common;

trace sphalerite; little pyrite.

Dolomite, gray-blue; little green shale; trace calcite; trace

pyrite and sphalerite.

Shale, green, sandy; abundant pyrite; phosphate nodules

common.

Sandstone; pyrite fairly common; little green and gray shale.

Shale, greenish-gray; trace pyrite.

Dolomite, tan, buff, and light-buff; trace green and yellow

shale, glauconite, pyrite and marcasite.

Dolomite, sandy, and dolomitic sandstone; trace glauconite,

pyrite, marcasite. Cherty oolite 290-300.

Dolomite, sandy; light -tan and cherty oolite; little green and

yellow shale.

Dolomite, light-buff; sandstone 20 percent; shale 20 percent;

trace oolite, glauconite, pyrite and marcasite.

Dolomite, buff, light-buff, grayish; fair green and buff shale;

trace pyrite and marcasite; considerable quartz and cherty

oolite 325-335, 365-380; silicified dolomite 340-345.

Dolomite, buff, light-buff; little sphalerite 395-405, little

pyrite and marcasite.

Dolomite, buff, and tan; little chert, green shale, trace

marcasite and pyrite; trace sphalerite 430-460; quartz

455-466; trace glauconite.

Sandstone; little glauconitic shale, quartz; trace oolite 466-

470, and pyrite.

Dolomite, sandy; trace pyrite and marcasite.

Dolomite, tan to buff; trace pyrite and marcasite, fair at

550-565, trace green shale.

Dolomite and dolomitic sandstone; very glauconitic; green

shale; trace pyrite and marcasite.

Sandstone and siltstone; very glauconitic; green shale, pyrite

3-4 percent, sphalerite 0. 1 percent 615-625.

23
Churn Drill Log-Continued.

Footage

From

625

645 

655

To

645

655 

685

Unit

Franconia

Franconia 

Franconia

Description

Sandstone and green shale; trace yellow shale; pyrite 1-3 percent, very glauconitic; trace sphalerite.

Shale and sandstone; very glauconitic; trace pyrite. 

Sandstone; little green shale, abundant 680-685; trace pyrite 

655-665; 675-685; very glauconitic.

Analyses

Feet

From

145

150

395

400

615

620

To

150

155

400

405

620

625

Zn

7.90

2.00

.25

.20

.10

.05

Fe

3.20

1.40

.90

1.10

2.25

2.75

24
HARRIS PROPERTY 

Harris no. 1

Location: 35 ft east, 50 feet north of southeast corner NWiNWi sec. 31, T. 5 N., R. 3 E. 

Date begun: 1/7/50 Elevation collar: 1081. 2 ft 

Date completed: 1/21/50 Total depth: 370 ft 

Water table struck: 130 ft Driller: Judd and Co.

Churn Drill Log

Footage

From

0

10

15

23

28

30

44

65

70

75

94

97

110

115

148

155

165

170

180

190

215

240

265

310

355

To

10

15

23

28

30

44

65

70

75

94

97

110

115

148

155

165

170

180

190

215

240

265

310

355

370

Unit

Decor ah -(Ion)

Deeorah-(Ion)

Decorah-(Guttenberg)

Decorah-(Speehts Ferry)

Flatte ville-(Quimbys Mill)

Flatte ville-(McGregor)

Flatte ville-(McGregor )

Flatteville-(McGregor)

Flatte ville -(Fecatonica)

Flatteville-fGlenwood)

St. Feter

St. Feter

St, Feter

Prairie du Chien

Prairie du Chien

Prairie du Chien

Frairie du Chien

Prairie du Chien

Frairie du Chien

Frairie du Ch^ien '

Frairie du Chien

Prairie du Chien

Prairie du Chien

Trempealeau-{ Jordan)

Description

Soil.

Dolomite, yellow, oxidized.

Dolomite, yellow, mottled.

Dolomite, buff, mottled; trace pyrite.

Dolomite, buff, mottled; trace calcite, phosphate nodules,

pyrite and galena 1 percent.

Dolomite, tan; trace calcite.

Dolomite, buff to gray; trace pyrite.

Dolomite; trace pyrite, sphalerite and galena.

Dolomite; trace pyrite.

Dolomite; grayish-buff; trace pyrite.

Dolomitic sandstone; considerable phosphate nodules.

Sandstone; limonite (2-4 percent. )

Sandstone, trace chalcopyrite.

Sandstone, little pyrite.

Dolomite, buff, slightly sandy, with heavy quartz and cherty

oolite. Fair pyrite and limonite (3 percent).

Dolomitic sandstone and buff dolomite; little quartz and

cherty oolite. Trace green shale, pyrite and limonite.

Dolomitic sandstone and buff dolomite, trace quartz, little

limonite and pyrite.

Dolomite, buff; trace quartz and cherty oolite; little pyrite,

limonite, marcasite and sphalerite.

Dolomite, buff; trace sphalerite, fair pyrite and marcasite.

Dolomite, buff; pyrite, marcasite, limonite (0. 1-0. 8 percent)

Dolomite, buff to gray; considerable quartz and chert (2-15

percent). Fair pyrite and marcasite (0. 8-2 percent).

Dolomite, buff; little green shale 240-245; cherty oolite 250-

260; little chert and quartz; little pyrite and marcasite

0. 1-0.2 percent.

Dolomite, buff; trace pyrite and marcasite; glauconite 270-

280; cherty oolite 305-310; little quartz and chert.

Dolomite, tan to buff; sandy; trace pyrite; quartz and cherty

oolite 310-315; little green shale 310-315, 325-355; cherty

oolite 330-335, 350-355; trace pyrite; trace glauconite

310-320, 345-350.

Dolomitic sandstone, fair green shale, trace pyrite.

Analyses

Feet

From

170

175

To

175

180

Zn

0.20

.25

Fe

1.10

1..55

25
SFITZBARTH PROPERTY

Location: 820 ft west, 110 feet south of 

Date begun: 1/23/50 

Date completed: 2/6/50 

Water table struck: 43 ft

Spitzbarth no. 1

southwest corner NW^NWi sec. 30, T. 5 N., R. 3 E. 

Elevation collar: 1014. 2 

Total depth: 275 ft 

Driller: Judd and Son.

Churn Drill Log

Footage

From

0

15

71

75

80

85

90

95

125

235

260

265

To

15

71

75

80

85

90

95

125

235

260

265

275

Unit

St. Peter

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Description

Soil and residual material.

Sandstone; trace chert and green shale, limonite; few phosphate

nodules.

Dolomite, buff, oxidized; some brown and green shale; cherty

oolite and quartz; trace limonite.

Dolomitic sandstone; dolomite, buff; oxidized; trace pyrite and

limonite .

Dolomite, buff, oxidized; trace pyrite and limonite.

Dolomitic sandstone, oxidized.

Dolomite, buff, oxidized, trace pyrite and limonite.

Dolomite, buff, sphalerite, quartz, marcasite and pyrite from

100-120 feet.

Dolomite, pinkish to grayish-buff; trace sphalerite, pyrite,

marcasite, glauconite.

Dolomite, sandy, tan, trace pyrite and marcasite.

Dolomite, sandy, tan ; cherty oolite, trace pyrite and marcasite.

Dolomite, sandy, and dolomitic sandstone, cherty oolite;

trace pyrite and marcasite.

Analyses

Feet

From

100

105

110

115

To

105

110

115

120

Zn

0.2

. 1

.35

.2

Fe

1 1. $kDU

1.0

1.25

.65

26
KENNEDY MINE PROPERTY 

Kennedy no. 1

Location: 665 ft north and 245 ft east of southwest corner SEiSWl sec. 29, T. 1 N., R. IE. 

Date begun: 9/24/49 Elevation collar: 792. 5 ft 

Date completed: 10/12/49 Total depth: 520 ft 

Water table struck: 75 ft Driller: Gille Bros.

Churn Drill Log

Footage

From To Unit Description

0

90

105

114

119

120

126

155

173

175

294

305

355

400

475

496

90

105

114

119

120

126

155

173

175

294

305

355

400

475

496

520

Galena

Decorah-(Ion)

Decor ah-(Ion)

Decorab-(Guttenbe^g)

Decorah-(Spechts Ferry)

Flatteville-CQuimbys Mill) 

Platte ville - (McGr egor)

Platte ville - (Fecatonica) 

Flatte ville -(Glenwood)

St. Peter

St. Peter 

Prairie du Chien

Prairie du Chien 

Prairie du Chien

Prairie du Chien

Tr e rnpealea u - (Jor dan)

Dolomite, yellowish-buff and buff, cherty; sphalerite 15-20,

70-95; little lirnonite, pyrite and marcasite. 

Dolomite, gray and buff; little sphalerite, pyrite, and marcasite. 

Dolomite, gray-blue, mottled; little sphalerite, marcasite,

pyrite and calcite. 

Dolomite, light- and dark-tan, dense; little sphalerite, fair

pyrite. 

Limestone, buff, argillaceous, fossiliferous; phosphate

nodules; little chert and shale; trace galena and sphalerite;

fair pyrite. 

Limestone and shale, brown; sphalerite 1.4 percent; pyrite

2.4 percent. 

Limestone, light-gray and buff; little calcite and pyrite; trace

green shale.

Dolomite, gray and light-gray, mottled; trace pyrite 155-160. 

Shale, green; phosphate nodules; fair pyrite. 

Sandstone, large to medium grained, with pyritic inclusions;

little green and gray shale; considerable pyrite; 2-2. 5 percent from 285-294.

Shale, green and red-brown, with sand grains; little pyrite. 

Dolomite, buff; sandy 325-340; little green and brown shale

abundant 325-330; trace pyrite. 

Quartz and chert; dolomite 368-375, 380-386; trace pyrite and

marcasite, little green and gray shale. 

Dolomite, buff and pink; little quartz, abundant 411-417; little

quartz sand 425-430, pyrite and inarcasite, trace-fair;

cherty oolite 470-475. 

Dolomite, buff and pink; sandstone 475-478; fair pyrite and

marcasite; cherty oolite 475-480, 490-495; little black to

green shale. 

Sandstone, pink and buff; some dolomites; little pyrite,

marcasite, and quartz; green to black shale, 496-500.

Analyses

Feet

From

75

80

85

90

120

285

290

455

465

490

To

80

85

90

95

125

290

295

460

470

495

Zn

1.90

1.00

.65

.50

1.40

Fe

2.65

L90

2.00

1.50

2.40

2.40

1.90

2.35

1.30

1.00

27
Kennedy no. 2

Location: 1230 ft east and 630 ft north of southwest corner sec. 29, T. 1 N., R. 11. 

Date begun: 10/3/49 Elevation collar: 800. 9 

Date completed: 10/27/49 Total depth: 5tO ft 

Water table struck: 75 ft Driller: Judd and Co.

Churn Drill Log

Footage

From

0

100

117

125

135

138

148

180

201

205

295

340

365

520

To

100

117

125

135

138

148

180

201

205

295

'340

365

520

530

Unit

Galena

Decorah-(Ion)

Decorahr(Ion)

Decorah-(Guttenberg)

Decorah-(Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatteville-(McGregor)

Platteville-(Pecatonica)

Flatte ville -(Glenwood)

St. Peter

Frairie du Chien

Frairie du Chien

Frairie du Chien

Trempealeau-( Jordan)

Description

Dolomite, yellow-buff and buff, cherty; sphalerite, pyrite

and marcasite; trace-fair from 40-100; trace galena 45-

72, 85-100.

 Dolomite, light-gray and buff; little sphalerite, marcasite,

pyrite, and calcite.

Dolomite, blue-gray, mottled; slightly sandy; trace sphalerite,

pyrite and marcasite.

Dolomite and limestone, light-tan, dense; very good

sphalerite, abundan? marcasite and pyrite; little galena.

Limestone, buff, mottled, fossiliferous, with phosphate

nodules. Fair sphalerite, marcasite and pyrite common,

trace galena and calcite.

Limestone, chocolate-brown, dense; fair sphalerite, marcasite and pyrite; trace galena; calcite.

Limestone, light -gray to buff, mottled; sphalerite, marcasite

and pyrite trace-fair. Qalcite 150-160, trace gray shale

165-175.

Dolomite, light-gray to buff; trace pyrite and marcasite.

Shale, green, very sandy; fair pyrite.

.Sandstone, medium to large grains; trace pyrite and marcasite;

black opaque grains 240-295.

Dolomite, buff; cherty oolite 325-340; little green, gray, and

brown shales; pyrite trace-fair.

Dolomite, buff, and green, brown, and gray shale; with

cherty oolite; quartz common; trace pyrite and marcasite.

Dolomite, pink and buff; considerable quartz; trace pyrite

and marcasite; dolomitic sandstone 505-515.

Sandstone; with quartz; trace pyrite and marcasite.

Analyses

Feet

From

82

85

87.5

90.0

92.5

95

125

130

132.5

135

137.5

140

145

155

To

85

87.5

90

92.5

95

97.5

130

132.5

135

137.5

140

145

147.5

160

Zn

1.75

2.65

3.35

1.50

1.00

.70

8.10

7.40

5.00

1.40

.40

1.50

.80

.50

Fe

5.60

7.85

7.55

4.65

4.40

3.15

16.10

22.40

10.70

6.90

2.10

1.60

1.20

1.60

Fb

Tr.

Tr.

Tr.

0.10

Tr.

Tr.

...

...

Tr.

Tr. ,

...

Kennedy no. 3 (Core Drill Log) 

Location: 1305 ft N. 60° E. of southwest corner sec. 29, T. IN., R. 1 E.

Date begun: 8/8/49 

Date completed: 8/16/49. 

Water table: not reached

Elevation collar: 808 ft 

Total depth: 240.9 ft 

Driller: Frank Balcar

28
Kennedy no. 3 (Core Drill Log)-Continued

Footage

From

0

6

104.5

120.5

129

142.5

146

155

189

210

213

229

To

6

104.5

120.5

129

142.5

146

155

189

210

213

229

240.9

Unit

Galena

Decorah-(Ion)

Decorah-(Ion)

Decorah-(Guttenberg)

Decor ah- (Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatte ville - (McCr egor )

Flatte ville -(Fecatonica)

Flatte ville - (Glenwood)

St. Feter

St. Feter

Description

Surficial material.

Shale, green; sandstone; phosphate nodules.

Sandstone, gray.

Sandstone, white to yellowish.

Kennedy no. 3A (Churn Drill Log 0-291 feet, 

Diamond Drill Log 291-424 feet)

Location: 990 ft N. 63° E. 

Date begun: 8/20/49 

Date completed: 9/3/49 

Water table: not reached

of southwest corner sec. 29, T. 1 N. , R. IE. 

Elevation collar: 808. 7 ft 

Total depth: 424 ft 

Driller: 0-291, Judd & Son

291-424, Frank Balcar

Footage

From

0

10

50

85

90

95

100

110

115

125

130

144

145

156

188

210

212

285

291

311

312.1

319

319.7

352.5

365.2

389.4

405.6

409. 1

411.3

414.3

417.3

422

To

10

50

85

90

95

100

110

115

125

130

144

145

156

188

210

212

285

291

311

312.1

319

319.7

352.5

365.2

389.4

405.6

409. 1

411.3

414.3

417.3

422

424

Unit

Galena

Galena

Galena

Galena

Galena

Galena

Decorah-(Ion)

Decorah-(Ion)

Decorah-(Ion)

Decorah-(Guttenberg)

Decorah-(Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatte ville - (McGr egor )

Flatte ville-(Fecatonica)

Flatte ville - (Glenwood)

St. Feter

St. Feter

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Description

Soil and residual material.

Dolomite, buff, oxidized, cherty, trace limonite.

Dolomite, buff, cherty; trace limonite, pyrite.

Same, with trace sphalerite.

Same, no sphalerite.

Same, shine sphalerite.

Same, no sphalerite.

Dolomite, gray, trace shale, green, marcasite and pyrite,

limonite; shine sphalerite.

Same, no sphalerite.

Same, trace sphalerite.

Limestone, buff; brown shale; pyrite.

Shale, green.

Limestone, brown; shale, brown pyrite.

Limestone, gray.

Dolomite, gray.

Shale, green, sandy.

Sandstone.

Sandstone, pink; light-green shale.

Dolomite, gray, siliceous; shale, green cryptozoon.

Sandstone.

Dolomite, gray.

Shale, green and red; glauconite.

Dolomite, gray, and dolomitic sandstone, glauconitic to 322.

Shale, green, sandy, glauconitic; trace pyrite.

Dolomite, buff, cherty; glauconite.

Shale, grayish-jreen; dolomite, buff sandstone and oolite at

base.

Sandstone, dolomitic, argillaceous.

Dolomite, shale, green; sandstone.

Sandstone.

Dolomite; sandstone.

Dolomite; oolitic; glauconite.

Cotton rock.

29
Kennedy no. 3B (Churn Drill Log)

Location: 990 ft N. 63 E. of southwest corner sec. 29, T. 1 N., R. 1 E.

Date begun: 2/9/50 Elevation collar: 808. 7

Date completed: 2/28/50 Total depth: 525 ft

Water table struck: 80 ft Driller: Judd and Son

Footage

From To Unit Description

0

20

120

129

143

146

155

189

206

20

98

120

129

143

146

155

189

206

213

Galena 

Decorah-(Ion)

Decor ah-(Ion) 

Decorah-(Guttenberg)

Decorah-(Spechts Ferry) 

Flatteville-(Quimbys Mill) 

Flatteville-(McGregor) 

Flatteville-(Fecatonica) 

Flatteville -(Glenwood)

Residual Soil.

Dolomite, yellow-buff and tan, cherty. Trace pyrite. Trace

pyrite. Trace sphalerite 55-65, 90-98. 

Dolomite, gray and buff, mottled. Trace pyrite and

sphalerite 110-115.

Dolomite, gray, mottled. Trace pyrite, sphalerite, calcite. 

Limestone, light to dark-tan, dense, fossiliferous. Trace

pyrite, trace sphalerite 129-135.

Limestone, light-buff to-tan, mottled, phosphatic, fossiliferous, little brown and green shale. Trace pyrite. 

Limestone, light- to dark-brown, dense. Trace pyrite;

marcasite, and brown shale. 

Limestone, light-gray and tan, mottled. Trace pyrite

175-189. 

Dolomite, light-gray and tan. Trace pyrite and marcasite

195-206. 

Shale, green, and tan dolomite; with rounded, colorless

quartz grains, phosphatic. Fyrite and marcasite 3 percent.

30
Kennedy no. 4 (Churn Drill Log)

Location: 655 ft N. 60° E. of southwest corner sec. 29, T. 1 N., R. 1 E.

Date begun: 10/15/49 Elevation collar: 845 ft

Date completed: 10/29/49 Total depth: 570 ft

Water table struck: 120ft Driller: GilleBros.

Footage

From

0

20

35

142

155

161

175

180

190

225

245

251

295

325

330

340

345

385

390

400

450

465

495

550

To

20

35

142

155

161

175

180

190

225

245

251

295

325

330

340

345

385

390

400

450

465

495

550

570

Unit

Galena

Galena

Decorah-(Ion)

Decorah-(Ion)

Decorah-(Guttenberg)

Galena-(Spechts Ferry)

Flatteville-(Quimbys Mill)

Platteville-XMcGregor)

Flatteville -(Fecatonica)

Platteville-(Glenwood)

St. Feter sandstone

St. Feter sandstone

St. Feter sandstone

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Frairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Jordan

Description

No sample.

Dolomite, buff.

Dolomite, buff, cherty; trace limonite.

Dolomite, gray, trace pyrite and marcasite.

Limestone, gray mottled.

Limestone, buff; shale, brown; little pyrite.

Limestone, white argillaceous, phosphate nodules

Limestone, brown; shale, brown; trace pyrite.

Limestone, grayish, argillaceous, trace pyrite.

Dolomite, brownish; little pyrite.

Shale, green; sandstone, argillaceous, pyrite 7%.

Sandstone, pyrite 3%.

Sandstone, little pyrite.

Sandstone; shale, light green; trace pyrite.

Dolomite, gray to brown, siliceous, trace pyrite.

Same, with oolite; trace pyrite.

; pyrite 2%.

Same, no oolite; glauconite; shale, green, . with white mica.

Green shale as above; shale, red, micaceous.

Shale, red, micaceous.

Dolomite, buff, cherty, oolitic 405-410, 425-430;

430-435, trace of pyrite; shale, green, red.

Same, but no pyrite; oolite; shale, green, red.

Shale, purplish, green; oolite, chert, dolomite.

-

glauconitic

Chert, shales as above, dolomite and oolite at base.

Chert, siliceous dolomite; sandstone; green shale, little pyrite

31
JAMES MINE AREA 

James no. 1 (Diamond Drill Log)

Location: 1510 ft S. 53° E. of northwest corner SW| sec. 9, T. IN., R. 2 E.

Date begun: 7/29/49 Elevation collar: 943.8 ft

Date completed: 8/30/49 Total depth: 494. 8 ft

Water table struck: not recorded. Driller: Frank Balcar

Footage

From

0

13

43.8

44.2

71.6

71.8

89.9

103.2

110.0

122.7

123.3

137.2

167

191.7

194.1

197.5

261

295.5

356.' 9

359.7

362

385.9

397.9

405.2

434.5

446.9

470

491.1

493.7

To

13

43.8

44.2

71.6

71.8

89.9

103.2

110.0

122.7

123.3

137.2

167

191.7

194.1

197.5

261

295.5

356.9

359.7

362

385.9

397.9

405.2

434.5

446.9

470

491.1

493.7

494.8

Unit

Galena

Galena

Galena

Galena

Galena

Decorah-(Ion)

Decor ah- (Ion)

Decorah-(Guttenberg)

Decorah-(Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatteville-(McGregor)

Flatteville -(Pecatonica)

Flatteville - (Glenwood)

St. Peter sandstone

St. Peter sandstone

St. Peter sandstone

St. Peter sandstone

St. Feter sandstone

St. Peter sandstone

St. Peter sandstone

St. Peter sandstone

St. Peter sandstone

St. Feter sandstone

St. Feter sandstone

Prairie du Chien

Prairie du Chien

Frairie du Chien

Description

No core (surficial and residual material).

Dolomite, grayish buff, cherty; little pyrite and marcasite.

Same, -with sphalerite 2%.

Same, no sphalerite.

Same, with sphalerite 0. 5%.

Same, no sphalerite.

Dolomite, light gray, shaly partings, trace marcasite.

Limestone, gray, shaly partings.

Limestone, tan; brown shale.

Shale, green; limestone, greenish buff; phosphate nodules;

little pyrite.

Dolomite and limestone, brown; brown shale partings; trace

pyrite, barite.

Limestone, gray, argillaceous.

Limestone, grayish brown.

Shale, green; sandstone.

Sandstone, white; pyrite 3%.

Sandstone, white to gray, trace pyrite.

Sandstone, gray to brown; trace pyrite.

Sandstone, yellow to red.

No core.

Shale, red.

Limestone; shale, red and green; red chert.

Shale, red; sandstone.

Dolomite, buff-gray; shale, red.

Sandstone; shale, red; oolitic chert near top.

White chert; dolomite, buff, siliceous; sandstone, brown.

Sandstone; shale, green and brown; white chert; white

siliceous dolomite.

Dolomite, tan; chert.

No core.

Dolomitic sandstone; oolitic chert; shale, green.

NX core 0-457. 5 .ft

AX core 457. 5-494. 8 ft

32
MEEKERS GROVE AREA (RAISBECK PROPERTY) 

Raisbeck no. 1 (Churn Drill Log)

Location: 92 ft N., 445 ft W. of southwest corner of SEi sec. 21, T. 2 N., R. 1 E. 

Date begun: 10/29/49 Elevation collar: 1002. 6 ft 

Date completed: 11/5/49 Total depth: 475 ft 

Water table struck: 165 ft Driller: Judd and Co.

Footage

From To

0

18

33

45

52

66

71

78

110

132

136

368

397

426

450

455

460

18

33

45

52

66

71

78

110

132

136

368

397

426

450

455

460

475

Unit

Galena

Decorah-(Ion)

Decor ah- (Ion)

Decorah-(Guttenberg)

Decor ah- (Spechts Ferry)

Flatteville-(Quimbys Mill)

P latte ville - (McGr egor )

Platte ville -(Fecatonica)

Platte ville -(Glenwood)

St. Feter sandstone

Frairie du Chien

Prairie du Chien

Frairie du Chien

Frairie du Chien

Frairie du Chien

Jordan

Description

Soil.

Dolomite, yellow-buff, cherty, limonitic.

Limestone, gray, mottled, fossiliferous; limonitic.

Limestone, blue, mottled, limonitic.

Limestone, tan, buff; trace pyrite; little calcite; phosphate

nodules.

Limestone, buff, very fossiliferous; abundant phosphate

nodules; little green shale; trace pyrite.

Limestone, chocolate brown; tan and. dense; trace pyrite.

Limestone, light gray and buff; fossiliferous 90-110; trace

pyrite.

Limestone and dolomite, gray, tan; trace pyrite, calcite.

Shale, green, with sand grains. Pyrite common, little galena.

Sandstone, grains well-rounded; orange colored 150-350; black

opaque grains 235-368; trace galena, little pyrite at top.

Dolomite, buff and pink; cherty 368-375; trace pyrite and

marcasite; little pink and green shale.

Shale, green, red-brown, with little sand grains; trace

pyrite and marcasite.

Sandstone; chert 30%; secondary silicification 30%; trace

green shale, marcasite, and pyrite.

Chert and quartz; little green and red shale; trace pyrite and

marcasite.

Chert, brown-green shale, and quartz; trace pyrite and

marcasite.

Sandstone; red-green shale common; trace pyrite and

marcasite.

Raisbeck no. 2 (Churn Drill Log)

Location: 1840 ft N., 930 ft. W. of southwest corner SEi sec. 21, T. 2 N., R. 1 E.

Date begun: 10/29/49 Elevation collar: 914 ft

Date completed: 11/7/49 ' Total depth: 445 ft

Water table struck: 30 ft Driller: Gille Bros.

Footage

From To

0

7

10

22

25

32

67

86

95

120

130

145

285

415

420

435

7

10

22

25

32

67

95

95

120

130

145

285

415

420

435

445

Unit

Decorah-(Ion)

Decorah-(Guttenberg)

Decorah-(Spechts Ferry)

Flatteville-(Quimbys Mill)

Flatteville-(McGregor)

Flatteville-(Pecatonica)

Platte ville-(Glenwood)

St. Peter sandstone

St. Feter sandstone

St. Feter sandstone

St. Feter sandstone

St. Peter sandstone

St. Feter sandstone

St. Feter sandstone

Cambrian?

Description

No samples (soil and residual material).

Limestone, gray; trace pyrite.

Limestone, brown; trace brown shale.

Limestone, gray, little pyrite.

Dolomite, brown; brown shale, little pyrite.

Dolomite, gray, argillaceous; trace pyrite.

Dolomite, buff to gray; pyrite 1%.

Shale, green, sandy, glauconitic; pyrite 2%.

Sandstone, pyrite 3%.

Sandstone, pyrite 0. 5%.

Sandstone, argillaceous? pyrite 2%.

Sandstone, pyrite 0. 5%.

Sandstone, gray, little pyrite.

Sandstone, shale, light green, pyrite 0. 7%.

Shale, red; shale, olive; shale, light gray; sandstone; trace

pyrite.

Dolomite, siliceous, glauconitic.

33
Raisbeck no. 3 (Churn Drill Log)

Location: 2832 ft N., 1195 ft W. of southwest corner SEi sec. 21, T. 2 N., R. 1 E. 

Date begun: 11/7/49 Elevation: 890. 5 ft 

Date completed: 11/17/49 Total depth: 450 ft 

Water table struck: 42 ft Driller: Judd and Company

Footage

From To Unit Description

0

65

82

88

98

102

105

111

140

\

160

161

289

292

295

300

310

65

82

88

98

102

105

111

140

160

161

289

292

295

300

310

450

Galena

Decor ah-(Ion) 

Decor ah-(Ion) 

Decor ah-(G uttenberg) 

Decorah-(Spechts Ferry)

Flatteville-(Quimbys Mill) 

Flatteville-(Quimbys Mill) 

Flatte ville - (McGr egor) 

Flatteville-(Fecatonica)

Flatte ville - (G lenwood) 

St. Feter sandstone

St. Feter sandstone 

Prairie du Chien 

Frairie du Chien 

Frairie du Chien

Frairie du Chien

Dolomite, yellow-buff; cherty, little limonite, pyrite and

marcasite - 4-8% at 50-65; calcite common. 

Dolomite, gray and buff, mottled; calcite common; pyrite and

marcasite 2%. 

Dolomite, blue, mottled; pyrite and marcasite 4-10%, little

sphalerite; calcite. 

Limestone, tan, dense, fossiliferous; calcite; pyrite and

marcasite 2%; little sphalerite. 

Shale, green and limestone, buff, very fossiliferous;

phosphate nodules; little pyrite and marcasite, trace

galena. 

Dolomite, tan-brown, fine-grained; calcite common, pyrite

and marcasite 1. 5%. 

Limestone, tan-brown, partially dolomitized; calcite common;

pyrite and marcasite 1. 5%, trace sphalerite. 

Limestone, buff; trace sphalerite; fair pyrite and marcasite;

calcite. 

Dolomite, light gray; little calcite, trace pyrite and

marcasite.

Shale, green-white; pyrite 2. 5%. 

Sandstone; little green shale 161-175, black opaque sand

grains 250-289; trace pyrite and marcasite. 

Shale, green, sandy; trace pyrite and marcasite. 

Sandstone and dolomite, buff. 

Dolomite, buff; little green shale, trace pyrite. 

Shale, green and dolomite, buff-pink; trace pyrite and

marcasite. 

Dolomite, buff, pink; little shale, green and white; abundant

at 305-310; 405-410; 440-445; cherty oolite 380-395; trace

pyrite and marcasite.

34
VINEGAR HILL ROASTER PROPERTY

Vinegar Hill Roaster no. 1

Location: NEiNElNEi sec. 6, T. IN., R. 

Date begun: 12/5/49 

Date completed: 12/21/49 

Water table struck: 30 ft

IE.

Elevation collar: 950.3 ft 

Total depth: 500 ft 

Driller: Gille Bros.

Churn Drill Log

Footage

From 1 To

0

15

32

90

100

108

112

115

120

142

168

175

220

225

235

260

275

285

300

320

325

370

385

405

445

450

455

470

475

490

492

15

32

90

100

108

112

115

120

142

168

175

220

225

235

260

275

285

300

320

325

370

385

405

445

450

455

470

475

490

492

500

Unit

Galena

Galena

Decorah-(Ion)

Decorah-(Ion)'

Decorah-(Guttenberg)

Decorah-(Spechts Ferry)

4

Flatteville-(Quimbys Mill)

Platteville -(McGregor)

P latte ville -(Pecatonica)

Platteville - (Glenwood)

St. Peter sandstone

St. Peter sandstone

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Prairie du Chien

Jordan

Description

Soil and residual material.

Dolomite, yellow buff to gray, cherty; trace pyrite,

marcasite, limonite.

Dolomite, buff to gray, cherty, considerable pyrite,

limonite, sphalerite.

Dolomite, light blue gray; trace sphalerite, pyrite,

marcasite.

Dolomite, blue gray; abundant pyrite and marcasite; and

trace of sphalerite.

Limestone, tan; abundant pyrite and marcasite, trace of

sphalerite.-

Shale, green; some limestone, buff; trace sphalerite, little

pyrite and marcasite.

Limestone, brown; trace sphalerite, marcasite and pyrite.

Limestone, gray-buff; trace sphalerite, marcasite, pyrite.

Dolomite gray buff; trace sphalerite, marcasite and pyrite.

Shale, green, sandy; trace pyrite and marcasite.

Sandstone; trace pyrite.

Sandstone; green and white shale; trace pyrite.

Dolomite, buff; trace pyrite.

Dolomite, buff; trace pyrite, glauconite.

Dolomite buff; trace pyrite; marcasite.

Dolomite, buff; cherty; trace cherty oolite, trace pyrite,

glauconite.

Dolomite and dolomitic sandstone; chert, oolite; trace pyrite

and marcasite.

Dolomite, buff; trace pyrite, glauconite.

Dolomite, and dolomitic sandstone; trace pyrite.

Dolomite, buff, silicified, cherty; trace pyrite.

Dolomite and sandstone; cherty oolite; trace pyrite and

marcasite.

Dolomite, buff, cherty and silicified; cherty oolite; trace

pyrite and marcasite.

Same without the oolite.

Dolomite, tan, silicified; cherty oolite, little marcasite and

coarsely crystalline sphalerite; quartz, fractured ground.

Same, without the oolite, trace chalcopyrite.

Dolomite, tan, silicified, cherty; little marcasite, oolite.

Same, without the oolite.

Dolomitic sandstone and dolomite; trace marcasite and

pyrite.

Shale, green; dolomitic sandstone.

Sandstone, little sphalerite, marcasite and pyrite; trace

glauconite:

Analyses

Feet

From

50

55

65

70

To

55

60

70

75

Zn

1.3

1.1

1.35

3.25

Fe

3.00

3.15

4.75

4.55

35