GEOIXXJICAL SURVEY CIRCULAR 325

STRATIGRAPHIC SECTIONS 

OF THE PHOSPHORIA 

FORMATION IN WYOMING 

1952

This report concerns work done on 

behalf of the U. S. Atomic Energy 

Commission and is published with 

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

Douglas McKay, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

GEOLOGICAL SURVEY CIRCULAR 325

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN WYOMING

1952

By R. P. Sheldon, E. R. Cressman, L. D. Carswell, and R. A. Smart

This report concerns work done on 

behalf of the U. S. Atomic Energy 

Commission and is published with 

the permission of the Commission.

Washington, D. C., 1964

Fr«e on application to the Geological Surrey, Washington 26, D. C.
STRATIGRAPHIC SECTIONS OF THE PHOSPHORJA FORMATION IN WYOMING

1952

By R. P. Sheldon, E. R. Cressman, L. D. CarswelL, and R. A. Smart

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

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

Stratigraphy of the Phosphoria 

formation in western Wyoming.

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

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

Tables of Stratigraphic 

sections

Middle Piney Lakes.......

CONTENTS

Lot no. Page

1

1

1

4

4

1377

Lot no. Page

Tables of Stratigraphic 

sections Continued

Deadline Ridga................. 1380 8

Fontenelle Creek............... 1379 11

Basin Creek.................. . 1381 15

West Branch of

Hams Fork Creek............. 1383 19

Wheat Creek.................... 1378 20

SouthMountain pit and mine...... 1382 23

ILLUSTRATIONS

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

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

Page

2

3

INTRODUCTION

The U. S. Geological Survey has measured and 

sampled the Phosphoria formation of Permian age at 

many localities in Wyoming and adjacent states. The 

data will not be fully synthesized for many years, but 

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

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

(fig. 1) during 1952, is the fourth Wyoming report of 

this series. The field and laboratory procedures 

adopted in these investigations are described in a 

previous report (McKelvey and others, 1953a).

Many people have taken part in this investigation. 

T. M. Cheney participated in the description of strata 

and the collection of samples referred to in this report 

and T. K. Rigby assisted in the collection of samples. 

The laboratory preparation of samples for chemical 

analysis was done in Denver, Colo., under the direction of L. F. Rader. The chemical analyses were 

made for the Survey by the U. S. Bureau of Mines at 

the Northwest Electrodevelopment Laboratory, 

Albany, Oreg., under the direction of S. M. Shelton 

and M. L. Wright.

K. S. Bergman compiled most of the data and 

Anita Wise organized the tabular data.

ACKNOWLEDGMENTS

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

and J. Steele Williams, who contributed much in the 

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

and laboratory investigations has been borne partly by 

the Division of Raw Materials of the Atomic Energy 

Commission. It is a pleasure to acknowledge the fine 

cooperation extended to the field parties by the local 

residents, property owners, and phosphate companies, 

who furnished information and services and gave access 

to property.

STRATIGRAPHY OF THE PHOSPHORIA FORMATION 

IN WESTERN WYOMING

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

into five members. These members have been tentatively correlated with the five members in Montana 

that are designated the _Aj B, C^ D, and Ej from 

oldest to youngest (Klepper and others in McKelvey, 

1949). Member A, overlies the Tensleep sandstone 

of Pennsylvanian age and consists of cherty carbonate 

and detrital rocks; it may be equivalent to the upper 

part of the Wells formation in Idaho. Members B_, 

C. and D, composed respectively of phosphatic, cherty,
Outcrop of Phosphoria formation, 

dotted where questionable

Location and lot number of sample 

locality included in this report

Location and lot number of sample 

locality Jncluded in other reports

Compiled and mottled from Love and often. 1952

40 Miles

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

3O 20 10

THICKIN FEET PERCENT

48

67

13

14

15

10

29

21

11

18

13

Trac«

23

19

28

23

16

Diowoody formation

Mudstone

'Phosphoria formation, 

Upper shale member 

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

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

medium -hard interbedded dolomite

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

chert and mud stone interbeds "

Rex chert member

Chert and limestone: hard, black, duck-bedded chert; hard, brownish-gray, thickbedded limestone represents about 10 percent of unit

Covered

Phosphatic shale member

Dolomite: hard, brownishrgray and black, thick-bedded; mudstoae and phosphate 

rock interbeds

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

thick-bedded; soft limestone and mjudstone interbeds

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

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

average V2O; content

Dolomite, mndstone, and limestone: interbedded, srgillaceous hard, brownishblack 'dolomite, phosphatic soft to medium-hard, black mudstone, and argillaceous 

hard, brownish-black limestone

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

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

Phosphate rock: medium coarse-grained, oolitic, soft, black, dun-bedded

Mudstone and dolomite: iaterbedded soft, black, thin-bedded mudstone andmedtumhsrd, brownish-black, thia-bedded dolomite; some finely oolitic, black, phosphate rock

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

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

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

dolomite and mudstone interbeds.

Mudstone; medium-hard, brownish-blsck to blsck, fissile to thin-bedded; phosphate rock at base

Wells formation

Limestone

Figure 2. Generalized section of the Phosphoria formation at Coal Canyon, Wyoming (lot no. 1201).
and phosphatic rocks, are equivalent to the phosphatic 

shale member, the Rex chert member, and the upper 

shale member of the Phosphoria formation in Idaho 

and southwestern Wyoming (Sheldon in Swanson and 

others, 1953). Member E_, not yet recognized in 

southeastern Idaho, consists of chert, sandstone, and 

carbonate rock and is overlain by the Dinwoody formation of Triassic age.

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

shale member, 95-145 feet in thickness; the medial 

Rex chert member, cherty limestone, 65-145 feet in 

thickness; and the upper shale member, 15-60 feet 

in thickness (fig. 2). It overlies the Wells formation 

of Pennsylvanian age and underlies the Dinwoody formation of Triassic age. Although the Wells formation 

consists largely of quartzose sandstone, calcareous in 

part; the upper 25 feet or more is dark-gray limestone 

and is equivalent to the upper member of the Wells formation in Idaho and may be the correlative of the lowermost member (A_ member) of the Phosphoria formation 

in northwestern Wyoming and Montana and, according 

to McKelvey, the lower limestone member of the 

Park City formation in Utah. The Dinwoody formation 

consists of limestone, calcareous siltstone, and 

sandstone.

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

Idaho, Montana, and Utah will be discussed in greater 

detail in a later publication. The phosphatic shale 

member in southwestern Wyoming and its correlative, 

the B_ member, in northwestern Wyoming contain most 

of th"e phosphate-bearing layers. The upper shale 

member and its correlative, the D_ member, contain 

only thin layers of phosphatic chert and phosphatic 

layers of local significance.

STRATIGRAPHIC SECTIONS

Analytical data and abstracts of stratigraphic 

sections measured at seven localities follow. 

Their locations, as well as the locations of those 

reported previously (McKelvey and others, 1953b, 

Sheldon and others, 1953, Cheney and others, 1953) 

and of others to be reported later, are shown 

in figure 1.

REFERENCES

Cheney, T. M., Sheldon, R. P., Waring, R. G., 

and Warner, M. A., 1953, Stratigraphic sections 

of the Phosphoria formation in Wyoming, 1951: 

U. S. Geol. Survey Circ. 324.

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

1952. Geologic map of Wyoming: U. S. Geol.

Survey. 

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

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

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

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

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

the Phosphoria formation in Idaho, part 1: U. S.

Geol. Survey Circ. 208. 

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

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

of the Phosphoria formation in Wyoming, 1947-48:

U. S. Geol. Survey Circ. 210. 

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

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

Phosphoria formation in Wyoming, 1949-50: U. S.

Geol. Survey Circ. 307. 

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

1953. Progress report of investigations of northwest 

phosphate deposits: U. S. Geol. Survey Circ. 297.
Middle Piney Lakes, Wyo., lot 1377

Phosphoria formation measured and phosphatic portions sampled from hand trenches and natural exposur

Creek, j mile northeast of Middle Piney Lake, NE^NWi sec. 8, T. 30 N., R. 115 W., Sublette Cou

20" W. and dip 10* E. Section measured by R= P. Sheldon, L. D. Carswell, and E. R. Cressman a

Carswell in May and June 1952. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, 

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Dinwoody formation basal bed only

-B-d-l

Covered interval; could be either 

Dinwoody or E (?) member or

8.0 

8.5

E (?) member of Phosphoria formation top not exposed

E- 1 Chert 10.5 

Upper shale member of Phosphoria formation

U-12 

01 U-ll

u-io

U- 9 

U- 8

U- 7 

U- 6 

U- 5 

U- 4 

U- 3

U- 2 

U- 1

Mudstone, cherty ---- - - - - 

Phf»-rt _ __ _ ____ _ __

Chert, argillaceous and mudstone- - 

Mudstone- - - - -- - 

Mudstone and chert- -- - -

7036-RPS

2.4 

.5 

3.9 

3.0 

2,7

5.4 

1.1 

3.8 

1.2 

1.0

8.0 

1.5 29.7

 »

12.5

Rex chert member of Phosphoria formation

R-32 

R-31 

R-30 

R-29 

R-28

R-27 

R-26 

R-25

V_* CXJL U VJiicXlC' JL VJJ-rlV CL1J.U ^IIOJL L

Carbonate rock and chert - - ----- 

7035-RPS

2.0 

4.0 

4.5 

5.0 

12.0

6.0 

6.0 

10.0

6.9 8.2
Middle Piney Lakes Continued

Bed 

no.

R-24 

R-23 

R-22 

R-21 

R-20

R-19 

R-18 

R-17 

R-16 

R-15

R-14 

R-13 

R-12 

R-ll 

R-10

R- 9 

R- 8 

R- 7 

R- 6 

R- 5

R- 4 

R- 3 

R- 2 

R- 1

Rock description

f Q Y*V"» f\n o t o TTif»lr

Sandstone - - -- ---- - ______ _

_*"* s> Y*}^f\nn to TTif*li" onH r»Vio T*t

_*"* 9 T*V^rtttQ to T*f"if*lr Q TlH f*VlOT*t

_*"* Q T*V^rt MQ to T*f"W"*lr

*pVi rtcnViQ to T*nf»lr

Chert --- - ----- 

Sandstone, carbonatic ----- -------- 

f Q T*V» fin a t o T*rtr*lr

Phprt

f Q T*V^f^nQ to T*rtf* lr

Chert -- -- 

Sample 

no.

--

Thickness 

(feet)

8.0 

2.0 

12.0 

7.0 

1.5

15.5 

5.8 

8.5 

6.5 

4.8

.3 

2.4 

.8 

3.5 

2.5

2.7 

1.0 

1.7 

2.7 

.8

. 1 

.7 

2.7 

.3

Chemical analyses 

(percent)

P2°5

 M

Acid 

insoluble

Phosphatic shale member of Phosphoria formation

P-35 

P-34 

P-33

P-32 

P-31

P-30 

P-29 

P-28

P-27 

P-26

Chert -- ______

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

Phosphate rock and phosphatic, calcareous 

chert ----------------- -_-__ _______

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

Phosphate rock ---- ______________ ___

Mudstone - ------ ____ .

Phosphate rock, argillaceous 

Mudstone - - 

Carbonate rock, argillaceous' 

Mudstone - __ ---- __--.

7034-RPS 

7033-RPS

7032-RPS 

7031-RPS 

7030-RPS

7029-RPS 

7028-RPS 

7027-RPS

7026-RPS 

7025-RPS

1.7 

.3

1.3 

4.0

.4

1.5 

.4 

.9

.4 

3.5

7.2 

1.6

29.4

5.3

31,2

3.1

18.7

.6

.4 

2.3

70.6 

7.7

15.6

70.8

10.0

72.1

31.7

76.1

20.3

76.5
P-25 

P-24 

P-23 

P-22 

P-21

P-20 

P-19 

P-18 

P-17 

P-16

P-15 

P-14 

P-13

P-12 

P-ll

P-10 

P- 9

P- 8 

P- 7 

P- 6

P- 5 

P- 4 

P- 3 

P- 2 

P- 1

P £> T*V\rtnO to Y*fV*t £> Y*Cf1 1 1 Q r*Ortl1 Q

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

Phosphate rock, argillaceous, carbonatic

Phosphate rock, argillaceous and

Carbonate rock, argillaceous and

Phosphate rock and phosphatic mudstone -

Chert, phosphatic --- - - -- -

7024- RPS 

7023- RPS 

7022- RPS 

7021 -RPS 

7020- RPS

7019- RPS 

7018-LDC 

7017-LDC 

7016-LDC 

7015-LDC

7014-LDC 

7013-LDC

70 12 -RPS 

7011- RPS

7010-RPS 

7009- RPS

7008- RPS 

7007- RPS 

7006- RPS 

7005- RPS

7004- RPS 

7003- RPS 

7002- RPS 

7001 -RPS 

7000- RPS

3.0 

2.0 

2.5 

2.5 

1.0

2.5 

2.5 

1.8 

2.0 

4.4

.5 

.9

1.0

.5

1.5 

1.2

3.0 

1.4 

4.6 

2.7

5.0 

.8 

.4 

1.4 

.5

.2 

1.2 

.3 

4.7

4.5 

1.9 

1.3 

.8 

2.2

8.7 

2.6

11.0 

1.6

22.9 

1.5

11.6 

25.1 

2.0 

4.3

15.1 

1.6 

20.0 

34.4 

14.5

23.2 

63.8 

35.3 

35.4

42.2 

27.3 

28.8 

43.6 

77.2

51.8 

22.9

26.3 

9,0

17.0 

20.4

21.8 

12.6 

28.7 

40.0

28.6 

4.1 

25.1 

4.4 

44.6

Wells formation upper part only

f*w- 1

Pw- ?

Pw- ^

r*w- 4

r*w- ^

Cw- 6

Cw- 7

C* w ft

Cw- 9

fw-10

fw-1 1

f* Q T*V\rtno to T*f^r*li"

f* Q T*V\rtna to Y*f^f*lf

f* VioY*t r*QT*V\f^no 1 1 r*

Sandstone - --- --- --- ---- ____

f* Q T*V\ rt n Q t o T* f^r* \f

Sandstone - - _.-__ __ __ __ _

Sandstone ---_ --- - _-_ - -

f* f^vc*Y*oH i ntot*vo 1

2.1

5.5

.9

.5

7"\ 0

19.0

1.5

1 7 3

13.1

18.0

8.3

« 

 

_ _

 

-« 

-M

 _

 M

_.

__

- 

 Ml

 __

__ 

 Ml

 

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

** Note incompleteness of cumulative data.
Deadline Ridge, Wyo., lot 1380

Phosphoria formation measured and phosphatic portions sampled in bulldozer trenches on west limb of ant

T. 27 N., R. 114 W., Lincoln County, Wyo. Beds strike N. 40» W. and dip 45» SW. Section measu

Cheney, and L. D. Carswell and sampled by Smart, Carswell, and T. K. Rigby in July 1952. Samp

of Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Dinwoody formation not measured

E ( ? ) member of Phosphoria formation

E- 1

_.

ert

-- 20.0 -- 

Upper shale member of Phosphoria formation

U-20 

U-19 

U-18 

U-17 

U-16

U-15 

U-14 

U-13 

U-12 

U-11

U-10 

U- 9 

U- 8 

U- 7 

U- 6

U- 5 

U- 4 

U- 3 

U- 2 

U- 1

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

-L lAVJOJ^SAlcLLw JL \J\*£±j \~lt^& LJT

Chert, carbonatic -- - --------- --- -

-L -.AwO^Jlld Lv? 1 \s\+i\. t lfoL.1 UwiloLLJH*

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

Chert 

/"""* VioT't __ iTfi 1 1 Q f*f_tmi c

Chert, phosphatic - -- - ---

Mudstone -------- _________________ ___

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

"pVi fiQnViis to T*f"if*lr Q T*cri 1 1 Q f*ooii Q -.-._.-._. _. 

Phosphate rock ----- --- _-.___ ___ _

7218-TMC 

7217-TMC 

7216-TMC 

7215-TMC 

7214-TMC

7213- RAS 

7212- RAS 

7211 -RAS 

7210- RAS 

7209- RAS

7208- RAS 

7207- RAS 

7206- RAS 

7205- RAS 

7204- RAS

7203 -RAS 

7202- RAS 

7201 -RAS 

7200- RAS 

71 99- RAS

1.0 

.7 

1.0 

.5 

1.2

2.9 

1.2 

2. 1 

1.0 

.4

2. 1 

2.0 

3.8 

6.5 

3.1

.5 

1.3 

1.1 

.9 

.5

6.5 

11.0 

5.9 

13.2 

9.5

4.8 

4.7 

7.3 

14.7 

2.4

2.7 

2.4 

3.0 

2.8 

2.4

10.7 

28.4 

10.0 

31.7 

25.3

60.5 

57.2 

63.6 

43.4 

46.3

60. 1 

39.7 

57.2 

47.6 

80.9

77. 1 

75.7 

75.6 

69.7 

76.9

53.5 

16.5 

47.7 

6.7 

14.7

Rex chert member of Phosphoria formation

R-19 

R-18 

R-17 

R-16 

R-15

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

.--

1. 1 

1.3 

.4 

1.4 

2.6 --
R-14 

R-13 

R-12 

R-ll 

R-10

R- 9 

R- 8 

R- 7

R- 6 

R- 5

R- 4 

R- 3

R- 2 

R- 1

1 * Vio ¥*$ Q nri oViot Y*"i"v r*Q T*VirvnQ to Y*rvr*lr

/""* Q Y»l"k /"vn o t *3» T*rtolf _ _ _ _. _.

1 * Q T*VirvMQ t o Y*rvo tr _ _ _ _

Covered interval; chert, carbonate rock,

Covered interval; carbonate rock and chert 

float 

fho-rt - -- - ________________ __ _ __

7198-TMC

2.5 

1.0 

3.5 

2.5 

2.5

2.0 

3.0

200.0 

2.0 

1. 7

.6

35.0 

2.7 

4.7

32.4

 1»

4.6

Phosphatic shale member of Phosphoria formation

P-39 

P-38 

P-37 

P-36 

P-35

P-34 

P-33 

P-32 

P-31 

P-30

P-29 

P-28 

P-27 

P-26 

P-25

P-24 

P-23 

P-22 

P-21 

P-20

P-19 

P-18 

P-17 

P-16 

P-15

P-14

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

Mudstone - - - - 

Mudstone, carbonatic - - -

Carbonate rock, argillaceous- - - - 

Mudstone - ----- - _ 

7197- RAS 

7196- RAS 

7195- RAS

7194-LDC

7193-LDC 

7192- LDC 

7191-LDC 

7190- LDC 

7189- RAS

7188- RAS 

7187- RAS 

7186- RAS 

7185- RAS 

7184- RAS

7183- RAS 

7182- RAS 

7181- RAS 

7180- RAS 

7179- RAS

7178- RAS 

7177- RAS 

7176- RAS 

7175- RAS 

7174- RAS

7173- RAS

0.5 

.8 

1.3 

5.0 

.5

.7 

. 5

.4 

.8 

.8

2.0 

.4 

7.5 

1.1 

.6

.8 

.5 

1.0 

.6 

.8

1.1 

4.3 

.5 

.9 

1.9

.6

2.0 

4.5 

26.7

6.3

8,1 

5.1 

7.6 

.3 

4.6

1.2 

10.5 

.4 

4.6 

1.6

.7 

5.4 

3.7 

4.8 

1.4

1.4 

.6 

9.1 

.9 

.7

2.0

78.3 

46.9 

20.0

57.5

55.6 

70. 1 

52.0 

78.5 

66.0

68.1 

50.8 

70.8 

48.5 

63.4

68.4 

64.3 

56.8 

69.4 

74.8

52.2 

76.5 

53.4 

38.2 

29.0

64.7
Deadline Ridge C ontinued

Bed 

no.

P-13 

P-12 

P-ll 

P-10 

P- 9

P- 8 

P- 7 

P- 6 

P- 5 

P- 4

P- 3 

P- 2 

P- 1

Rock description

Phosphate rock, argillaceous, carbonatic -

Phosphate rock, argillaceous - 

Sample 

no.

7172- RAS 

7171- RAS 

7170- RAS 

7169- RAS 

7168- RAS

7167- RAS 

71 66- RAS 

7165- RAS 

7164- RAS 

71 63- RAS

7162- RAS 

7161- RAS 

7160- RAS

Thickness 

(feet)

2.6 

1.2 

1.2 

.8 

1.4

.5 

2.5 

5.1 

.4 

3.5

3.4 

1.0 

1.2

Chemical analyses 

(percent)

P2°5

1.3 

4.8 

8.8 

12.6 

24.2

3.6 

1.1 

5.5 

1.0 

17.9

2. 1 

18.8 

14.4

Acid 

insoluble

68.9 

34.9 

38. 1 

24.9 

14.5

20.2 

25.4 

45.3 

6.8 

27.7

5.4 

27.0 

6.9

C

Wells formation not measured

Cw-1
Fontenelle Creek, Wyo., lot 1379

Phosphoria formation measured and phosphatic portions sampled from two bulldozer trenches, a hand trenc

side of Fontenelle Creek in Bridger National Forest, sec. 35, T. 27 N., R. 116 W., Lincoln County, 

and dip 55* SW. Section measured by R. P. Sheldon, L. D. Carswell, R. A. Smart, and E. R. Cress

Rigby in June 1952. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Add 

insoluble

Dinwoody formation not measured

1-d-l IWTnH Qtono f*Q T*hrtno t i o -- -- -- -- 

E (?) member of Phosphoria formation

E- 4 

E- 3 

E- 2 

E- 1

/"* Q T*h<"ina t o i*fir*lf

f"*Hpi»t witH miiHct r>no r»aT*tincrQ

Chert

Chert with mudstone partings and 

mudstone -- -- - -- --- -

7132- RAS 2.2 

30.0 

1.8

4.1

7.4 15.5 

Upper shale member of Phosphoria formation

U-18

U-17

U-16

U-15

U-14

U-13

U-12

u-n

u-io

U- 9

U

_ Q

U- 7

U- 6

U- 5

U- 4

U- 3

U- 2

U- 1

Chert

Mudstone, carbonatic- - --- - -

/"* a r*Hr>na tp i*ftpt ^Hpi*tv

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

Chert 

Mudstone 

{"* a T*H nn n t ^ T*or*t aT*a"i 1 1 ao^rtiiQ

Phprt

Mudstone, phosphatic and carbonatic

"Pho^nHat^ i*or*t

C* a T*Virtna to i*rv*t

71-11 _ir<Tjr«

71 "%0-T TJP

1.3

1.4

1.7

.5

2.1

.4

1.2

,7

2.7

2.4

1.6

1.7

2 3

.3

.6

.9

.7

.9

 ^

^ ^

 --

^ ^

29.2

26.7

 »

_ t>

« 

U K

10.4
Fontenelle Creek Continued

.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Rex chert member of Phosphoria formation

R-29 

R-28 

R-27 

R-26 

R-25

R-24 

R-23 

R-22 

R-21 

R-20

R-19 

R-18 

R-17 

R-16 

^R-15

CO

R-14 

R-13 

R-12 

R-ll 

R-10

R- 9 

R- 8 

R- 7 

R- 6 

R- 5

R- 4 

R- 3 

R- 2 

R- 1

\^cll UUflcLlcr J Ul*l_. 

Mudstone - - ----- ______ ____

Mudstone, carbonatic-- - - - - -

v_» cxj, ukJiicxLc? x \j\+r±

Sandstone, carbonatic, - -- 

Chert, sandy --- - -- _____

Sandstone, carbonatic - -- -- 

Chert 

T^Vi^^tnVisi tf* T*rtf*lr r*Vi^T*tv

C^ Q T'Virtni to T'rt^lr

f~* Q Y'Virtn*- to ~r*f\f*]f TiVirt*^.TiVi*- ti r* sinrf j^Vif^Y't

Chert, phosphatic, carbonatic- ---__.-

C^ fn T*Vi^no to v*r\f*\r

Ph^rt

T?Vi rtClYVh oto T'rtolf f*Vl**T"t'V

(** QT*Virttnto T'rtolr

Mudstone - - - -- -

Chert and argillaceous carbonate rock -_- 

7129- RPS

7128- RPS 

7127- RPS

9.0 

10.6 

43.0 

6.0 

6.5

.8 

2.8 

3.8 

3.6 

1.3

1.5 

3.3 

4.0 

6.5 

7.5

7.0 

.4 

5.0 

1.5 

.7

.4 

.5 

.2 

.3 

2.3

.6

4.0 

1.8 

3.2

20.2

7.8 

18.4

30.9

40.6 

39.7

Phosphatic shale member of Phosphoria formation

P-45 

P-44 

P-43 

P-42 

P-41

(~* £1 yVi^FiQ to j*f^f*\r

Mudstone, carbonatic ---

Mudstone, carbonatic- - -- ---

7126- RAS 

7125-RAS 

7 124- RAS 

7123-RAS 

7122- RAS

0.8 

.9 

5.9 

.4 

1.0

0.5 

1.3 

1.1 

.7 

1.2

15.8 

62.1 

63.6 

63.2 

59.4
P-40 Carbonate rock, argillaceous ---- - -- 7121-RAS

P-39 Mudstone-- -- 7120-RAS

P-38 Carbonate rock, argillaceous ---- -- - 7119-RAS

P-37 Mudstone- 7118-RAS

P-36 Carbonate rock------------- 7117-RAS

P-35 Mudstone and chert ----- ------------- 7116-RAS

P-34 Phosphate rock -- 7115-RAS

P-33 Mudstone, carbonatic- ----- -_--__ 7114-RAS

P-32 Phosphate rock 7113-RAS

P-31 Mudstone- 7112-RAS

P-30 Phosphate rock--- 7111-RAS

P-29 Phosphate rock, argillaceous -- --------- 7110-RAS

P-28 Phosphate rock, argillaceous ---- 7109-ERC

P-27 Phosphate rock -- 7108-ERC

P-26 Mudstone and calcareous phosphate rock---- 7107-ERC

P-25 Phosphate rock, argillaceous and

	carbonate rock --- - - ---- -- 7106-ERC

P-24 Carbonate rock, argillaceous ----------- 7105-ERC

P-23 Mudstone, carbonatic ---------------- -- 7104-ERC

P-22 Mudstone - _____ -- -- 7103-ERC

P-21 Mudstone 7102-ERC

P-20 Mudstone ---- -- 7101-ERC

P-19 Mudstone, carbonatic -------------- --- 7100-ERC

P-18 Mudstone, carbonatic -------------------- 7099-ERC

P-17 Mudstone, carbonatic -------------------- 7098-RAS

P-16 Carbonate rock, argillaceous ------ ---- 7097-RAS

P-15 Mudstone, phosphatic, carbonatic --------- 7096-RAS

P-14 Carbonate rock-------------------------- 7095-RAS

P-13 Phosphate rock, argillaceous, carbonatic -- 7094-RAS

P-12 Carbonate rock, argillaceous -- ---- - 7093-RAS

P-ll Carbonate rock, argillaceous ------- - - 7092-RAS

P-10 Mudstone ----- __________ ____

P- 9 Carbonate rock, argillaceous ---- ---- - 7091-RAS

P- 8 Mudstone, carbonatic - -______-____-__ 7090-RAS

P- 7 Carbonate rock----- - ----- - 7089-RAS

P- 6 Phosphate rock - ------ ____________ 7088-RAS

P- 5 Phosphate rock, argillaceous, carbonatic -- 7087-RAS

P- 4 Carbonate rock, phosphatic--- _-----___ 7086-RAS

P- 3 Phosphate rock-- - --- - - 7085-RAS

P- 2 Carbonate rock, argillaceous --- ---- 7084-RAS

P- 1 Phosphate rock, argillaceous ------ ---- 7083-RAS

.8 

3.2 

1. 1

.8 

1.5

.5

2.6

2.7 

1.0 

1. 1

1.2 

1. 5

.9 

1.8

.7

1.8

1.7

1.2

.9

.7

2.7 

3.9 

3.1 

2.2

1.3

.6

1.4 

3.9

2.8 

.8

2.9

.8

1.5

3.3

.9

1.9

1.4

.4

.5

.7

1.9 

K5 

.6 

2.2 

1.0

5.3

34.3

.5

31.8

5.3

30.6

23.9

26.6

22.7

12.0

18.6

1. 5

.2

.4

3.2

3.9 

.7 

.5

5.9 

.6

11.4

2.5

14.4

1.7

4,7

3.9

7.5

6.8

24,1

15. 5

13.4

25.0

1.4

25.2

22.2

67.1

22.9

64.0

1.3

64.3

1.3

64.3

3.9

70.8

7. 1

23.6

17.7

9.7

24.4

35.0

24.1

57.7

70.4

62.4

71.9

53.8

45.8

44.7

22.6

37.2

15.6

18.1

20.1

29.3

22.6

42.8

14.6

11.4

17.3

7.8

4.6

35.9

23.1

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

'* Note incompleteness of cumulative data.
Fontenelle Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

___(percent)___

P2°5

Acid 

insoluble

C

t

Wells formation upper part only

Cw- 1 Carbonate rock - ________ _ __

Cw- 2 Chert, carbonatic --- ------

Cw- 3 Chert -------------------------------

Cw- 4 Carbonate rock and cherty, argillaceous 

	carbonate rock --

Cw- 5 Chert 

Cw- 6 Chert, carbonatic and chert - - 

Cw- 7 Chert and carbonatic chert - 

Cw- 8 Mudstone - - --

Cw- 9 Chert and carbonatic chert __________

Cw-10 Chert, carbonatic ___ ___ _ -_ ___

Cw-11 Chert and carbonatic chert - 

Cw-12 Carbonate rock, argillaceous - _____

Cw-13 Carbonate rock, argillaceous ------

Cw-14 Mudstone --- ___________ ______ __

Cw-15 Sandstone, carbonatic _

Cw-16 Sandstone, carbonatic -

3.5 

3.0

10.3

.8

.4

5.0

4.8

5.0

4.2

1.9

.7

.5

3.4
Basin Creek, Wyo. , lot 1381

Phosphoria formation measured and sampled from bulldozer trenches and natural exposure on the north side 

limb of a doubly plunging anticline, sees. 12 and 13, T. 26 N., R. 117| W., Lincoln County, Wyo. B

45» W. Section measured by R. A. Smart, T. M. Cheney, and L. D. Carswell and sampled by Smart 

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

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

C 

Dinwoody formation not measured

Upper shale member of Phosphoria formation

U-17 

U-16 

U-15 

U-14 

U-13

U-12

u-n 

u-io

U- 9 

U- 8

U- 7 

U- 6 

U- 5 

U- 4

U- 3

U- 2 

U- 1

Mudstone, phosphatic-- - 

Mudstone, phosphatic--- - -

Mudstone - - - - - - - 

Beds U-4, U-3, and U-2 are fractured 

and cut by faults.

Phosphate rock, cherty and phosphatic

7276- RAS 

7275- RAS 

7274- RAS 

7273- RAS 

7272- RAS

7271- RAS 

7270- RAS 

7269- RAS 

7268-TMC 

7267-TMC

7266-TMC 

7265-TMC

7264- LDC

1.2 

.9 

1. 1 

1.7 

1.3

1.2 

.9 

2.3 

.5 

.2

.4 

1.0 

13.0 

5.0

2.0 

1.0 

2.1

18.2 

26.4 

25.5 

24.6 

21.5

22.0 

22. 1 

19.1 

13.9 

12.6

4.6 

24.5

21.6

39.8 

18.6 

23.8 

27.1 

33.2

33.5 

31.7 

40.0 

51.3 

59.9

62.9 

30.0

39.4

Rex chert member of Phosphoria formation

R-21 Carbonate rock and cherty carbonate

Bed R-21 probably cut by fault.

Cumulative data incomplete because of missing information.

-- 25.0 
Basin Creek Continued

Bed 

no.

R-20 

R-19 

R-18 

R-17 

R-16

R-15 

R-14 

R-13 

R-12 

R-ll

R-10 

R- 9 

R- 8 

R- 7 

R- 6

R- 5

S R- 4 

R- 3 

R- 2 

R- 1

Rock description

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

Phiart ______________-__-_----------------

Chert and mudstone - --- - -- -

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

\_sCLl UUIlcLlc? i ULrKj CIICX Ljr « « « » » »

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

Phosphate rock -- - - - - -

JViUUolUIlt? cLIIU L*Ilc?X ^ 

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

Sample 

no.

Thickness 

(feet)

5.0 

2.0 

5.0 

20.0 

5.0

4.0 

30.0 

4.5 

.3 

2.6

3.3 

6.0 

7.5 

12.0 

2.0

1.9 

1.2 

1.4 

.8 

2.3

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

C

Phosphatic shale member of Phosphoria formation

P-51 

P-50 

P-49 

P-48 

P-47

P-46 

P-45 

P-44 

P-43 

P-42

P-41 

P-40 

P-39 

P-38 

P-37

P-36 

P-35 

P-34

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

Mudstone, phosphatic, carbonatic 

Carbonate rock, argillaceous ---- 

Mudstone, phosphatic - --- - 

Phosphate rock ---- --- -

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

Phosphate rock ---- - - -

Phosphate rock, argillaceous 

Phosphate rock - - - ----

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

Phosphate rock, argillaceous 

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

Phosphate rock and mudstoneMudstone ---- ---- - -

Phosphate rock, argillaceous

7260- RAS 

7259- RAS 

7258- RAS 

7257- RAS

7256- RAS 

7255- RAS 

7254- RAS 

7253- RAS 

7252- RAS

7251- RAS 

7250- RAS 

7249- RAS 

7248- RAS 

7247- RAS

Mudstone 

Mudstone 

Mudstone

1.0 

.5

2.6

2.7 

.5

.3

1.7

1.8 

.8 

.7

.3 

2.0 

.6 

.6 

.3

.9

.7

2.2

32.9

35.6

10.7

31.1

3.5

32.4

26.8

32.7

1.5

23.8

2.4

22.5

1.4

27.4

12.4

3.4

63.6

14.0

79.8

11.5

22.5

13.0

85.6

28.5

83.5

30.1

82.1

19.3
P-33 

P-32 

P-31 

P-30 

P-29

P-28 

P-27 

P-26 

P-25 

P-24

P-23 

P-22 

P-21 

P-20 

P-19

P-18 

P-17 

P-16 

P-15 

P-14

_ P-13 

-a P-12 

P-ll 

P-10 

P- 9

P- 8 

P- 7 

P- 6 

p- 5 

P- 4

P- 3 

P- 2 

P- 1

Mudstone - - 

Mudstone, phosphatic - 

Phosphate rock - - 

Mudstone-- - -

/^a T^Hnnato T*fv*lr a T*eri 11 a r»orm Q

Mudstone-------------------.-.--.- _-__-_--

"PHncriHa to r*nolr a. T*en* 1 la r*f*r\\i c=

"Plir\c:r\Ha to T*nr»lr a T*cfi 1 1 a r»omi cs

Mudstone, phosphatic and mudstone - 

Carbonate rock argillaceous--------- _ ---

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

"Ol^r^criHa to T*<"kf*lr

*OVi r\er\Vi Q to T*or»lr a t*cH 1 1 a f»or\n c

C* a T*V\rtna to T*Of*lr a T* tfi 1 1 a oo rtn Q

Phosphate rock - - 

"PH rkttriHa to T*r\r*\r

"PlinttnHa to t*r\f*\r a T* tfi 1 1 a r*omi ft

"OVi r\<sr\h a to T*nf*lr a T*cfi 1 1 af*o rtn cs

Sample 7263-LDC represents beds P-l and 

P-2, but taken in road cut below measured 

section.

7246- RAS 

7245- RAS 

7244- RAS 

7243- RAS

7242- RAS 

7241- RAS 

7240- LDC 

7239- LDC 

7238- LDC

7237- LDC 

7236- LDC 

7235- LDC 

7234- LDC 

7233- LDC

7232- LDC 

7231- LDC 

7230- LDC 

7229- LDC 

7228- LDC

7227- LDC 

7226- LDC 

7225- LDC 

7224- LDC 

7223- LDC

7221-LDC 

7220- LDC 

7219- LDC 

7263-LDC

1.2 

3.4 

1.4 

1.6 

1.3

2.7 

3.5 

.7 

.7 

1.2

1.0 

.6 

3.5 

1.8 

.7

2.5 

.6 

.7 

.7 

.6

1.0 

1.5 

.8 

2.7 

1.7

.6 

1,3 

.3 

1.0 

1.7

.7 

.8 

1. 1 

(1.9)

 **

14.1 

27.9 

32.5 

3.2

.5 

2.6 

17.3 

22.7 

21.3

3.6 

15.2 

33.5 

32.3 

26.8

28.7 

14.7 

6.3 

2.3 

29.9

4.2 

.5 

4.1 

3.0 

4.7

31.0 

30.5 

16.7 

26.2

35.7 

18.2 

7.1 

60.7

35.7 

80.2 

40.6 

28.6 

34.7

23.9 

50.3 

8.2 

5. 1 

18.6

9.6 

41.6 

55.7 

39.8 

17.7

68.7 

77.3 

73.6 

78.3 

55.7

10.3 

18. 1 

34.4 

28.7

Wells formation upper part only

Cw-1 

Cw-2

0.7 

8.0 ~"*

 . 

* Cumulative data incomplete because of missing infotmation. Computations start from zero after interruption. 

"Note incompleteness of cumulative data.
Basin Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)___

P2°5

Acid 

insoluble

Cu

th

Cw- 3 Carbonate rock - ------- - _ 

Cw- 4 Phosphate rock, argillaceous - 7262-LDC

Cw- 5 Carbonate rock----- ---------- -_- 

Cw- 6 Mudstone - ______

Cw- 7 Carbonate rock - --

Cw- 8 Mudstone - -

Cw- 9 Phosphate rock, argillaceous 7261-LDC

Cw-10 Covered interval- - - -

Cw-11 Carbonate rock- - - - 

Cw-12 Sandstone -- - - - 

Cw-13 Mudstone -----------------------------

Cw-14 Sandstone - - T -

Cw-15 Sandstone - - -

0.9 

.3 

3.0 

1.0 

5.0

3.0 

.3

7.0 

.2

1.7

1.7 

1.0 

1.5

22.2

21.3

20.5

42.3

00
West Branch of Hams Fork Creek, Wyo., lot 1383

Partial section of the Upper shale member of the Phosphoria formation measured and sampled in a hand tre

Hams Fork Creek, at the mouth of Rock Creek, sec. 24, T. 26 N., R. 117 W., Lincoln County, Wyo. 

dip 25* S. Section measured by T. M. Cheney and sampled by T. K. Rigby in August 1952. Samples 

Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

C

t

Dinwoody formation basal bed only

1-d-l 3.0 

Upper shale member of Phosphoria formation upper part only

U Q

U- 7

U- 6

U- 5

U- 4 

U- 3

U- 2

"-1 TT- 1

Mudstone, phosphatic- -

Mudstone, cherty ---- - - -

Mudstone, cherty - - --- -- 

Mudstone, cherty and mudstone 

Chert - - -

 7700 rrr+rt-i

It tit T^KIM"*

 7001 mum-1

f£,Ol- 1MI>

1 £>O\i- ImLx

* * i s j. jyiiwr

TOOT T'THW'

7277-TMC

1.2

.5

1.3

2. 1 

1.6

2.6

1.0

16.0

5.7

13.7

2.9

1.7 

1.4

1.6

43. 1

L-) Q

55.4

QR Q

03. ?

87.4

QQ 1

85.5
Wheat Creek, Wyo.. lot 1378

Phosphoria formation measured and phosphatic portions sampled in bulldozer trench on west limb of anticlin

Creek, sec. 4, T. 23 N., R. 116 W., Lincoln County, Wyo. Beds strike north and dip 60* W. Sectio

E. R. Cressman, L. D. Carswell, R. A. Smart, and R. P. Sheldon in June 1952. Samples analyzed by 

laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

C

t

E (?) member of Phosphoria formation top not exposed

E

z

E

C

E - 4

E

_ !

E

_ 0

E

_ 1

Chert 

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

Chert 

Chert -- -------

__

 --

 ^

18.0

.3

8.5

.5

4.6

2.9

__

 _

__

_ M

_ 

-

__

__

__

_ 

_

Upper shale member of Phosphoria formation

U

o

U- 7

U- 6

U- 5

U- 4

U- 3

U- 2

U- 1

"PHoQFlJTQ to T*fV*lr 9 T*tfl 1 1 Qr*tfi/"ill Q

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

Mudstone - - -- -- -- - 

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

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

Phosphate rock, argillaceous -- -- 

Tfift?- ft AQ

7081 -RAS

1.2

1.7

3.6

9.6

3.2

1.1

.7

1. 1

22.7

-. 

. 

25.1

 » 

25. 1

_ _

__

__

15.6

Rex chert member of Phosphoria formation

R-22 

R-21 

R-20 

R-19 

R-18

R-17 

R-16 

R-15 

R-14 

R-13

R-12 

R-ll

Carbonate rock, argillaceous 

Covered interval-------- - 

Carbonate rock, sandy ------

Chert - 

Carbonate rock ------ _-__.

Chert and phosphate rock 

Carbonate rock - ----

Phosphate rock ------- 

Carbonate rock ------- 

Phosphate rock - - -

Carbonate rock 

Phosphate rock

7080-RPS 

7079-RPS

7078-RPS

8.4

112.5

10.0

9.0

1.3

.6

4.0

.5

2.5 

.3

2.6

1.5

32.5

31.0

29.3

2.7 

4.7

3.7
RilO 

R- 9 

R- 8 

R- 7 

R- 6

R- 5

R- 4 

R- 3 

R- 2 

R- 1

Carbonat ro k

Phosnhate rock

Carbonate rock

Phosnhate rock

f* sk T*Viona to T*rv*t a T*tfi 1 1 a r*ooii cz

Sandstone, carbonatic and sandy

Chert-- 

/""* V|rf3iT*t _ . j* . . _ _

7077- RPS

7076- RPS 

7075- RPS

1.5 

.5 

1.0 

1.0 

2.0

13.5 

1.5 

9.0 

8.0 

13.0

26.9

27.7 

1.9

12.5

15.2 

28.6

Phosphatic shale member of Phosphoria formation

P-34 

P-33 

P-32 

P-31 

P-30

P-29 

P-28 

P-27

P-25

P-24 

P-23 

P-22

P-21

P-20

P-19 

P-18

P-17 

P-16 

P-15

P-14 

P-13 

P-12 

P-ll 

P-10

P- 9 

P- 8 

P- 7 

P- 6 

P- 5

Mudstone, carbonatic and phosphate rock---

Mudstone - - - -

Mudstone - --- -

Carbonate rock, cherty and argillaceous

Carbonate rock, argillaceous, phosphatic 

Phosphate rock and argillaceous

Mudstone - - 

Phosphate rock, argillaceous --- - -

Phosphate rock, argillaceous - 

Phosphate rock- - - - -- 

7074-ERC 

70 73 -ERG 

7072-ERC 

7071 -ERG 

70 70 -ERG

7069-ERC 

7068-ERC 

7067-ERC 

7066-ERC 

7065-ERC

70 64 -ERG 

7063-ERC

7062-ERC 

7061 -ERG 

7060 -ERG

70 59 -ERG

7058-ERC 

7057-ERC 

7056-ERC 

7055-ERC

7054-ERC 

7053-ERC 

7052-ERC 

7051 -ERG 

7050-ERC

7049-ERC 

7048-ERC 

7047-ERC 

7046-ERC 

7045-ERC

0.7 

1.3 

1.2 

2.9 

1.1

2.3 

2.5 

2.1 

1.9 

4.1

2.3 

3.8

1.9 

1.0 

.5

3.4

2.2 

2.5 

2.5

1.4

1.5 

2.5 

1.7 

1.8 

.6

3.2 

.5 

.5 

1.4 

.6

17.4 

1.5 

.4 

10.9 

11.4

1.3 

2.2 

.5 

5.8 

.3

.6

5.8

2.8 

12.2 

1.4

9.1

16.9 

1.0 

7.6 

11.5

8.2 

15.3 

26.3 

16.2 

22.4

4.5 

20.4 

7.9 

34.0 

27.7

36.8 

80.9 

36.3 

51.4 

37.6

10.9 

72.8 

35.9 

67.5 

37.2

85.4 

39.6

24.6 

41.1 

26.4

27.6

15.9 

38.4 

51.5 

24. 1

42.4 

28.7 

15.6 

29.4 

24.8

12.5 

30.7 

59.1 

2.6 

16.5
Wheat Creek Continued

Bed 

no.

P- 4 

P- 3 

P- 2 

P- 1

Rock description

Mudstone - - - -- ---

Sample 

no.

7044-ERC 

7 043 -ERG 

7042-ERC 

7041 -LDC

Thickness 

(feet)

.8 

1.8 

.5 

1.4

Chemical analyses 

(percent)

P2°5

17.3 

2.0 

13.2 

25.5

Acid 

insoluble

34.2 

66.7 

40.8 

14.9

Wells formation upper part only

Pw- 1

Pw- ?

Pw- ^

Q^V- 4

Pw- 5

P w- A

P w- 7

Cw- 8

P w- 9

r1 w-i o

Cw-l 1

Pw-12

Pw-13

Pw-1 4

Pw-1 5

Cw-16

Cw-17

Cw-18

Pw-1 Q

Pw-20

Pw-21

Pw-7?

Cw-23

Pw-?4

P w-?S

Cw-26

Pw-27

Cw-28

Cw-29 

Cw-30

Pw-31

Pw-32

Pw-'?'?

P 9 T»h r\n Q f o T* r\r* \r

Mudstone, carbonatic- - - -- - -

Mudstone, sandy - - - --- - -

Mudstone, argillaceous -- - - --

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

P 9 T*Hnna t^ T*nolr 9 T*cn HP PA fill Q

Mudstone - - -- - - - -

P>lOT-t

Mudstone-- - - - - - - -- 

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

P 9 T*hnn9 i"c* T*nr*lr ........_.. __.._.. __.. _ _

P 9 T*h r\ n 9 1 o T* r\c* \r

P 9 T*h f\n a 4* o T* nr* lr 9 T* cr "i 1 1 9 o c* rw i Q

P 9 T*hnn9 1^ v*r\f*\c 9 T*CFI 11 9 f*tf*fiii Q _ _ _ _

Co nHQtnnP* P9 T*Hnr»9 ti P . _ » . » .

Sandstone, argillaceous -- - - - - -

Carbonate rock, argillaceous and chert .... 

Chert, argillaceous - - - -

Chert 

P 9 T*Vl C\T\ 9 t O T* f"4P If

7040- RAS

7039- T? A<?

*7H 1O "D A G

7037- RAS

--

3.7

2.6

.8

2.7

4.9

2. 1

3.6

4.6

1. 1

2.0

.4

.3

2.1

1.7

1.5

.6

1.2

3.2

.5

1.2

.9

1.1

.4

.3

2.2

3.0

4.6

.7 

1.5

.7

4.6

2.7

 

_ 

^ ^

_ 

_ 

8.4

8.2

7.2

4.5

 M

_

 fc-

^^

 

^^

_ fc-

 ^

57.5

*»w

__M

42.7

57.5

46.9

 
South Mountain Pit and Mine, Wyo., lot 1382

Partial section of the Phosphoria formation measured and some phosphatic portions sampled in exposure in 

raise on South Mountain, 13 miles northwest of Kemmerer, sees. 8 and 9, T. 23 N., R. 116 W., Lin

north and dip moderately to the west. Section measured by R. A. Smart and L. D. Carswell and sam

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

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

C

Rex chert member of Phosphoria formation top not exposed

R-22 

R-21 

R-20 

R-19 

R-18

R-17 

R-16 

R-15 

R-14 

R-13

R-12 

R-ll 

R-10 

R- 9 

R- 8

R- 7 

R- 6 

R- 5 

R- 4 

R- 3

R- 2 

R- 1

Mudstone, phosphatic - - --- - 

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

Mudstone and chert -- - - - - --

f* VlOT»t . . ... . . .. ...« ....

I^KOT** , . , .. . .. .. .....

0.8 

30.0 

60.0 

7.5 

3.0

10.0 

18.0 

1.8 

.9

.5

.9 

1.4 

1.0 

11.7 

.6

5.0 

8.0 

6.0 

7.5 

1.9

3.0 

8.0

Phosphatic shale member of Phosphoria formation

P-27 

P-26 

P-25 

P-24 

P-23

Samples 7133 through 7158 taken 

in open pit.

Mudstone - - -- - ---

7157-RAS 

7156-RAS 

7155- RAS 

7154-RAS 

7 153- RAS

1.8 

3.3 

.8 

.5 

.8

22.6 

.6 

4.5 

27.3 

3.2

31.7 

50.6 

69.8 

11.1 

60.5
South Mountain Pit and Mine Continued

P-22 Mudstone, carbonatic and phosphate

	rock 7152-RAS 

P-21 Mudstone, carbonatic 7151-RAS 

P-20 Carbonate rock ----- 7150-RAS 

P-19 Mudstone 7149-RAS 

P-18 Mudstone, carbonatic 7148- RAS

P-17 Mudstone 7147-RAS

P-16 Carbonate rock, argillaceous - 7146-RAS

P-15 Mudstone 7145-RAS

P-14 Mudstone 7144-RAS

P-13 Mudstone 7143-RAS

P-12 Mudstone -- 7142-RAS

P-ll Mudstone, carbonatic -- - - 7141-RAS

P-iO Carbonate rock, argillaceous 7140-RAS

P- 9 Mudstone, carbonatic - ---- 7139-LDC

P- 8 Carbonate rock, argillaceous --- 7138-LDC

P- 7 Phosphate rock, carbonatic - - -- 7137-LDC

P- 6 Phosphate rock, argillaceous, carbonatic 7136-LDC

P- 5 Carbonate rock, argillaceous - - 7135-LDC

P- 4 Mudstone, phosphatic, carbonatic -- - 7134-LDC

P- 3 Carbonate rock, argillaceous, phosphatic -- 7133-LDC

P- 2 Carbonate rock, argillaceous, phosphatic 7158-LDC 

	Covered interval ------- -___ ______

	Sample 7159-RAS taken in mine. 

P- 1 Phosphate rock, argillaceous _ _ 7159-RAS

2.0

1.3

1.6

.8

.5

2.1 

1.6 

1.2 

1.1 

2.9

2.6 

.7 

3.2 

3.4 

3.0

1.9 

1.0 

3.0 

2.2 

3.9

4.2 

5-10?

2.7

13.6

7.6

1.2

1.5

.4

3.0 

2.2 

3.4 

3.8 

1.1

.7 

2.3 

5.5 

5.3 

7.5

21.5

13.9

1.5

10.2

8.6

11.6

20.7

33.3

38.3

8.0

71.8

59.7

66.9

37.2

75.6

65.6

84.1

86.5

51.2

33.7

46.4

25.5

10.4

27.3

30.7

42.9

28.7

18.8

22.8

* Note incompleteness of cumulative data.