RC. 307 i

GEOLOGICAL SURVEY CIRCULAR 307

STRATIGRAPHIC SECTIONS 

OF THE PHOSPHORIA 

FORMATION IN WYOMING 

1949-50

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 307

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION IN WYOMING

1949-50

By R. P. Sheldon, R. G. Waring, M. A. Warner, 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., 1953

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

1949-50

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

CONTENTS

Lot no. Page

Introduction....................... 1

Acknowledgments .................. 1

Stratigraphy of the Phosphoria 

formation in western 

Wyoming........................ 4

Stratigraphic sections............... 4

Selected bibliography............... 4

Tables of Stratigraphic 

sections

Togwotee .................... 1327 5

Burroughs Creek ............ . 1329 7

Gros Ventre Slide ............. 1326 10

Flat Creek.................... 1335 13

Lot no. Page

Tables of Stratigraphic 

sections Continued

Dinwoody Lakes..............

Tosi Creek.... ..............

Hoback......................

Buck Creek..................

South Fork of Gypsum Creek.. 

Bartlett Creek ...............

Bull Lake....................

Conant Creek................

Poison Creek ................

Raymond Canyon.............

Cokeville....................

1325

1333

1324

1332

1336

1334

1328

1330

1331

1312

1289

16

18

21

24

26

30

31

35

37

40

41

ILLUSTRATIONS

Page

Figure 1. Outcrops of the Phosphoria formation in Wyoming and localities sampled ......................... 2

2. Generalized section of the Phosphoria formation at Coal Canyon, Wyoming, lot no. 1201........... 3

INTRODUCTION

As part of a comprehensive investigation of the 

phosphate deposits of the western field begun in 1947, 

the U. S. Geological Survey has measured and sampled 

the Phosphoria formation of Permian age at many localities in Wyoming and adjacent states. These data 

will not be fully synthesized for many years, but segments of the data, accompanied by little or no interpretatidh, are published as preliminary reports as 

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

(fig. 1) in 1949-50, is the second Wyoming report 

of this series. The field and laboratory procedures 

adopted in these investigations are described rather 

fully in a previous report (McKelvey and others, 1953a).

Many people have ta ken part in this investigation. 

The program of which this work is a part was organized by 

V. E. Me Kelvey and most of the field program was s upervisedbyR. W. Swanson. F. J. Anderson, D. F. Davidson, 

A. M. Gutstadt, J. W. Hill, H. W. Peirce, W. R. Record, 

and M. E. Thompson, participated in the description of strata 

and the collection of samples referred to in this report. 

T. K. Rigby assisted in the preparation of exposures and 

the crushing and splitting of samples in the field. The laboratory preparation of samples for chemical analysis was 

done in Denver, Colo., under the direction of W. P. Huleatt.

The PzOs and acid-insoluble analyses were made 

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

Northwest Electrodevelopment Laboratory, Albany, 

Or eg., under the direction of S. M. Shelton and 

M. L. Wright. TheAlzOa, FegOa, andloss-on-ignition 

analyses were made in the Trace Elements Section laboratory of the Survey in Washington, D. C., under the 

direction of J. C. Rabbitt, by chemists A. Caemmerer, 

G. Dudley, and N. Guttag.

Compilation of the data has been largely by 

K. S. Bergman under the supervision of R. W. Swanson. 

Organization of the tabular data has been largely by 

Anita Wise.

ACKNOWLEDGMENTS

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

andj. 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.
ia£

1330 .

A

EXPLANATION

Outcrop of Phosphoria formation, 

dotted where questionable

Location and lot number of sample 

locality included in this report

Location and lot number of sample 

locality included in other reports

ROCK SiiRRINGS

WYOMING

UTAH "COLORADO

Compiled and modified bom Love and othen. 1958

10 0

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

2
FE 

0

50 

100 

ISO

200

250 

268

PERCENT PjOg

SO 20 10

ET

1

tswssysa

KSSSSSSSSSSSSS

S^SSasySSi¥Sft

BBI

THICK- *""*« 

NESS P2 °B IH 

0 LITHOLOGY IN FEET PERCENT DESCRIPTION

8fc

I

i

 1

s§

^

>^^^^ ^^^

^

i^

^^^M

E§

- ^ \

_ _ __ __ __ .1

- -c

 .vi'.i

JL JL JC

jr x .JL

f. *, *- 

1 JC JL JC

Jt -j , jr

r TT Jt^ 

r XL Jt

^U^,

', t f 'i ', > ', / /

tT?\ I f /

1 i ' i ' i 1 / /

 '.'.' . 1/X

- 4 /

 ~i /'^ /

 -l _/ // t * i ' >J //

'' /'.\'< JV^X

III.

3

48

6

67

13 

14

15

10 

4

29

4

5

3

21

11

3

6

6

18

1

13

Trace

3

23 

6

2

7

19

7

28

8

23

6

16

2

Dinwoody formation 

Mudstone

: Phosphoria formation. 

Upper shale member 

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

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

medium-hard interbedded dolomite

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

chert and mudstone interbeds

"Rex chert member

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

Phosphatic shale member 

Covered 

Dolomite: hard, brownish-gray and black, thick-bedded; mudstone and phosphate 

rock interbeds

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

thick-bedded; soft limestone and mudstone interbeds

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

average ^(X content

Dolomite, mudstone, and limestone: interbedded, argillaceous hard, brownishblack dolomite, phosphatic soft to medium-hard, blackmudstone,andargillaceous 

hard, brownish-black limestone

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

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

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

Mudstone and dolomite: interbedded soft, black, thin-bedded mudstone and mediumhard, brownish-black, thin-bedded dolomite; some finely oolitic, blsck, phosphate rock

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

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

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

dolomite and mudstone interbeds.

Mudstone; medium-hard, brownish- black to black, 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.

3
STRATIGRAPHY OF THE PHOSPHORIA FORMATION 

IN WESTERN WYOMING

The Phosphoria formation is about 200 feet thick 

in northwestern Wyoming and has been divided into 

five members. They have been tentatively correlated 

with the five members in Montana that have been provisionally designated A, B, C_, D, and E_ from oldest 

to youngest (Klepper and others .in_McKelvey, 1949). 

Member A_, overlying the Tensleep sandstone of 

Pennsylvanian age, consists of cherty carbonate and 

detrital rocks; it may be equivalent to the upper part 

of the Wells formation in Idaho. Members B, C_, and D, 

composed respectively of phosphatic-cherty and phosphatic rocks, are equivalent to the phosphatic shale, 

Rex chert,and upper shale members of the Phosphoria 

in Idaho (Sheldon m. 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.

The Phosphoria formation in southwestern Wyoming 

(fig. 2) consists of a lower phosphatic shale member, 

95-145 feet in thickness; overlain by the Rex chert 

member, cherty limestone 65-145 feet in thickness; 

and capped by an upper shale member, f5 to 60 feet in 

thickness. 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. It 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 the lower limestone member of the Park City formation in Utah 

(McKelvey, 1949). 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 considered more 

fully in a later publication. Most of the phosphatic 

layers are in the phosphatic shale member of the 

Phosphoria formation in southwestern Wyoming and 

in the B member in northwestern Wyoming. The 

upper "shale member in southwestern Wyoming and its 

correlative the D member in northwestern Wyoming 

contain thin layers of phosphatic chert and locally significant phosphatic layers.

STRATIGRAPHIC SECTIONS

Analytical data and abstracts of stratigraphic 

sections measured at 15 localities follow. Their locations, as well as the locations of those reported 

previously (McKelvey and others, 1953b)' and of others 

to be reported later are shown in figure 1.

SELECTED BIBLIOGRAPHY

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

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

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

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

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

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

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

the Phosphoria formation in Idaho, pt. 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.

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

1953, Progress report on investigations of western 

phosphate deposits: U. S. Geol. Survey Circ. 297.
Togwotee, Wyo., lot 1327

Phosphoria formation measured and sampled at natural exposure by a tributary to Black Rock Creek 2 miles we

U. S. Highway No. 189, sec. 2, T. 44 N., R. Ill W., Teton County, Wyo., on the south limb of an anticlin

south. Beds strike N. 80° W. and dip 75° N. Section measured and sampled by H. W. Peirce, R. G. War

in August 1950. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analys

___(percent)_

P2°5

Ac

inso

Phosphoria formation top not exposed

P-32 Sandstone, carbonatic -------- - ______

P-31 Chert, argillaceous, sandy-- -- -- -- 

P-30 Sandstone, carbonatic, cherty - ---- - 

P-29 Chert 

P-28 Chert - 

P-27 Sandstone, phosphatic -- -- 5148- RGW

P-26 Sandstone, phosphatic - 5147-RGW

P-25 Sandstone, carbonatic 

P-24 Sandstone ----- -_- ---- _.

P-23 Sandstone, carbonatic --- --- - - ----

en

P-22 Sandstone --- - 

P-21 Sandstone, carbonatic -- -

P-20 Sandstone -- -

P-19 Chert -

P-18 Sandstone, carbonatic -- -

P-17 Carbonate rock, cherty - -- 

P-16 Chert -""- -

P-15 Mudstone, phosphatic 5146-MAW

P-14 Carbonate rock - - - --- ------

P-13 Chert -

P-12 Phosphate rock, sandy 5145-HWP

P-ll Phosphate rock, cherty 5144-HWP

P-10 Chert -

P- 9 Carbonate rock - -- ____ ____.

P- 8 Carbonate rock - 

P- 7 Mudstone, carbonatic - -

P- 6 Sandstone, carbonatic -

P- 5 Carbonate rock - - -

P- 4 Chert -

P- 3 Chert -

43.8

11.5

5.0

24.0

9.0

1.4 

.9 

6.0 

1.1 

4.0

1.6 

.8 

1.9 

4.0 

1.0

2.4

4.5

.8

.7

7.1

1.3 

1.2 

2.4 

2.2 

3.4

4.3

.5

.9

6.2

1.0

12.5

12.2

16.4

20.1

15.5

62

6

43

38

28
Togwotee Continued

Bed 

no.

P- 2 

P- 1

Rock description

Sample 

no.

__

Thickness 

(feet)

1.0 

3.1

Chemical analys

(percent)

P2°5

--

A

inso

-

Tensleep formation top bed only

T- 1
Burroughs Creek, Wyo., lot 1329

Phosphoria formation measured and sampled at a natural exposure near Burroughs Creek, NE* sec. 14, T. 43 N

County, Wyo., on the north flank of an overturned anticline. Section measured and sampled by H. W. Pei

July 1950, and R. A. Smart and T. M. Cheney in August 1951. Samples analyzed by U. S. Bureau of Mine

Oreg,

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analys

___(percent)_

P2°5

Ac

insol

Phosphoria formation

P-61 Carbonate rock, sandy ----------- - ---

P-60 Carbonate rock, sandy; fos. col. no.

12200 1 -------------- 

P-59 Sandstone, carbonatic -------- - - ----

P-58 Carbonate rock ------ - -- -------

P-57 Carbonate rock, cherty; fos. col. no.

12199 

P-56 Carbonate rock, cherty; fos. col. no.

12198 

P-55 Carbonate rock, cherty; fos. col. no.

12197 

P-54 Carbonate rock, phosphatic; fos. col.

no. 12196 

P-53 Carbonate rock; fos. col. no. 12196 --- ---- 

P-52 Chert, carbonatic; fos. col. no. 12196 --

P-51 Carbonate rock- --- - --

P-50 Chert 

P-49 Carbonate rock -- ------ -- ---

P-48 Chert; fos. col. no. 12195 ------------------

P.-47 Chert, carbonatic; fos. col. no. 12195 

P-46 Chert 

P-45 Sandstone, carbonatic, cherty - --------

P-44 Phosphate rock, carbonatic, sandy---------

P-43 Chert; fos. col. no. 12194 --- - 

P-42 Carbonate rock, argillaceous; fos. col.

no. 12194 

P-41 Chert; fos. col. no. 12194 

P-40 Sandstone, phosphatic; fos. col. no.

12194 

P-39 Chertjfos.col.no. 12194 -- -- 

P-38 Chert, argillaceous, carbonatic; fos. col. no.

12193 ,. 

2.6

13.0 

3.2 

2.0

8.0

5.8 

10.0

1.3 

.8 

.5

.7

.7

.6

2.2

2.0

.8 

2.0

.4 

3.3

1.0 

,7

.4 

1.6

4.4

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su
Burroughs Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analy

___(percent)

P2°5

Ac

inso

P-37 Chert, argillaceous, carbonatic ---

P-36 Sandstone, carbonatic 

P-35 Sandstone, cherty, carbonatic -- --------

P-34 Chert 

P-33 Chert 

P-32 Chert 

P-31 Chert 

P-30 Sandstone, phosphatic; fos. col. no.

12192 4970-JWH 

P-29 Sandstone, carbonatic; fos. col. no.

12191 4969-JWH 

P-28 Mudstone, sandy; fos. col. no. 12190 4868-JWH

P-27 Carbonate rock; fos. col. no. 12189 

P-26 Carbonate rock, argillaceous; fos. col.

no. 12188 

P-25 Mudstone, carbonatic; fos. col. no.

12187 

P-24 Carbonate rock; fos. col. no. 12187 -- 

P-23 Mudstone, carbonatic; fos. col. no.

12187 _ -________ __ ______ _

P-22 Carbonate rock; fos. col. no. 12186 - 

P-21 Carbonate rock; fos. col. no. 12185 ---- -

P-20 Mudstone, phosphatic 4967-JWH

P-19 Carbonate rock, cherty - - 

P-18 Carbonate rock, cherty; fos. col. no.

12184 - 4966-JWH

P-17 Carbonate rock, cherty; fos. col. no.

12183 

P-16 Carbonate rock; fos. col. no. 12182 - 

P-15 Mudstone- - - 

P-14 Mudstone, cherty - -

P-13 Mudstone 

P-12 Mudstone, cherty -- - -- - ---- 

P-ll Mudstone - - - - 

P-10 Mudstone - - 

P- 9 Carbonate rock - 

P- 8 Mudstone - - 

P- 7 Mudstone, carbonaticP- 6 Mudstone - - -- -- -- -- -- 

P- 5 Sandstone, carbonatic ---- -- -- 

P- 4 Carbonate rock, sandy- --- - - 

4.0 

4.0 

6.0 

5.2 

5.6

4.7

4.8

1.1

5.5 

1. 1

15.2 

4.9

.2 

1.3

.5

2.5 

2.1 

1.1 

3.2

1. 7

2.6 

4.9 

1.1 

6.7 

1.2

2.5 

2.2 

3.3 

1.7 

7.9

1.5 

3.8 

6.2 

2.4

9.0

3.5 

3.1

6

6

6

13.5 

6.1

3

3
P- 3 

P- 2 

P1 __

3.3

.8 

. .4

-

Tensleep formation upper part only

T- 1 

T- 2 

T- 3 

T- 4 

T5

T- 6 

T- 7 

T- 8 

T9

Sandstone - -

Sandstone - - -

Sandstone and chert - 

Mudstone, carbonatic -

Carbonate rock, sandy 

6.5 

3.8 

1.4 

4.4 

2.8

6.0 

13.0 

8.0 

7.0

--
Gros Ventre Slide, Wyo., lot 1326

Phosphoria formation measured and sampled at Gros Ventre Slide near Gros Ventre River, SW^sec. 5, T. 42 N

Wyo., on the west limb of an anticline. Beds strike N. 65 a W. and dip 22* N. Section measured and sa

R. A. Smart, H. W. Peirce, R. G. Waring and J. W. Hill in July 1950. Samples analyzed by U. S. Burea

Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

^Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thic

(f

Dinwoody formation basal bed only

-B-d-1 | 0.5 -- -- 

E member of Phosphoria formation

E- 7 

E- 6 

E- 5 

E- 4 

E- 3

E- 2 

E- 1

Chert 

J.VJ.UUi3 LwilCj V^lld. UJf

Sandstone, carbonatic; fos. col. no. 12135 --

Chert; fos. col. no. 12134 

--

2.4 

.5 

1.0 

17.0 

5.4

1.4 

30.0

--

--

D member of Phosphoria formation lower part only

D- 3

D- 2

D- 1

A covered interval of not less than 20 feet

occurs between D-3 and E-l. Hence, most

of D member and the lower part of E

member are not described.

Phosphate rock, argillaceous, and

phosphatic mudstone-- ------------- ----

Sandstone, phosphatic---- --- - --- -

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

4913-MAW

4912-MAW

4911-MAW

1. 1

1.2

1.9

12. 1

9.2

2

0

. O

AQ C

to. O

ej n

of.. 7

7A * ID. J

C member of Phosphoria formation

f*D

6*^.

\~> *-J

C-22

^ t* i

£tV

V-* 17 

Cl Q

\^f * 1

Mudstone, carbonatic; fos. col. no. 12132----

Carbonate rock - - - - -

4910-MAW

--

1 Q

6.6

2.0

1.4 

9. 1

.5

2

0

1.2

1. 1

--

79.2 

j
C-16 

C-15 

C-14 

C-13 

C-12

C-ll 

C-10 

C- 9 

C- 8 

C- 7

C- 6 

C- 5 

C- 4 

C- 3 

C- 2

C- 1

Mudstone, carbonaticMudstone -- --- 

Mudstone - 

Mudstone; fos. col. no. 12129 

Mudstone -- - -

Sandstone ---- - - - 

Chert 

Sandstone -- ---- --_- 

Carbonate rock, argillaceous 

Mudstone, carbonatic-- -

Chert 

Chert 

Carbonate rock, cherty 

Chert -- - - 

Chert and mudstone ---

Chert, calcareous and mudstone

3.4 

2.9 

2.0 

1.2 

1.9

1.0 

.7

1.2 

.7 

.6

1.3 

1.3 

.6 

1.7 

4.2

3.6

B member of Phosphoria formation

B-17

B-16 

B-15 

B-14 

B-13

B-12 

B-ll 

B-10 

B- 9 

B- 8

B- 7 

B- 6 

B- 5 

B- 4 

B- 3

B- 2 

B- 1

Phosphate rock, argillaceous; fos. col. 

no. 12128 

Mudstone, cherty - -- - 

Mudstone, cherty - - -

Mudstone, carbonatic - -- 

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

Sandstone and chert; fos. col. no. 12127 

4909-MAW

4908- HWP 

4907-HWP

4906- HWP 

4905- HWP 

4904- HWP 

4903- HWP 

4902- HWP

4901 -HWP 

4900 -HWP

0.3 

1.0 

1.0 

5.0 

3.0

1.0 

3.0 

2.3 

3.7 

1.0

1.8 

.6 

.9 

2.0 

.5

2.7 

1.1

23.8

.8 

.4

.3

5.5 

11.7 

30.9 

24.9

2.2

18.4

27.7

52.8 

74.4

31.3 

71.0 

47.6 

6.8 

2.1

88.7 

44.4

A member of Phosphoria formation

A- 2 

A- 1 Mudstone - -

-- 5.0 

1. 1 --

-- 

** Note incompleteness of cumulative data. 

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su
Gros Ventre Slide Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thic

(f

Tensleep formation upper part only

T- 1 

T- 2 

T- 3 

T- 4 

T- 5

T- 6

T- 7

(^aroonate rock « « -. -. -.-. 

Sandstone-- - - -- 

--

3.9 

5.2 

9.7 

3.5 

3.6

3.3 

8.4

--
Flat Creek, Wyo., lot 1335

Phosphoria formation measured and sampled at natural exposure near Flat Creek, 2. 9 miles east of Teton Na

sec. 6, T. 41 N., R. 114 W., Teton County, Wyo. Beds dip gently north. Section measured and sample

R. G. Waring, R. A. Smart, and M. A. Warner in August 1950. Samples analyzed by U. S. Bureau of Mi

Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thi

(

Dinwoody formation not measured

1-d-l -- -- -- -- 

E member of Phosphoria formation

E- 8 

E- 7 

E- 6 

E- 5 

E- 4

E- 3 

E- 2

E- 1

Sandstone, carbonaticjfos.col.no. 12628 --

Chert; fos. col. no. 12629 -- 

Chert 

Chert; fos. col. no. 12225 

Chert 

--

10.2 

.3 

. 7 

1.2 

26.3

7.3 

.7 

.5

~~ i

--

D member of Phosphoria formation

D-16 

D-15 

D-14 

D-13 

D-12

D-ll 

D-10 

D- 9 

D- 8 

D- 7

D- 6 

D- 5 

D- 4 

D- 3 

D- 2

D- 1

Mudstone, carbonatic - 

Mudstone -

Mudstone, carbonatic - - - 

5254- HWP 

5253- HWP 

5252- HWP 

5251 -HWP 

5250- HWP

5 249 -HWP 

5248- HWP 

5247- RGW 

5246- RGW 

5245- RGW

5244- RGW 

5243- RGW 

5242- RGW 

5241 -RGW 

5240- RGW

5238- RGW

1.6 

2.3 

3.8 

2.4 

.7

3.1 

2.3 

2.8 

3.5 

4.2

2.0 

.5 

2.2 

.5 

1.1

.5

2.3 

1.1 

2. 1 

3.9 

.9

2.7 

1.1 

2.5 

1.7 

.8

.9 

29.8 

2.3 

18. 1 

3.6

26.5

78.3 

74.5 

70.1 

63.9 

31.9

61.7 

42.6 

59.4 

62.2 

66.8

93.3 

9.7 

66.4 

32.6 

56.7

17.3

. 

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su
Flat Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thi

(

C member of Phosphoria formation

C-22 

C-21 

C-20

C-19 

C-18

C-17 

C-16 

C-15 

C-14 

C-13

C-12 

C-ll 

C-10 

C- 9 

C- 8

C- 7 

C- 6 

C- 5 

C- 4 

C- 3

C- 2 

C- 1

Phosphate rock, carbonatic, and

Carbonate rock; fos. col. no. 12223 ----- -

\*s d± UU1-.C-. UC J. UH IV.

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

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

V^dx UUna.lc 1 Ut-tv

V^Ild I

Mudstone, cherty, and chert - -- ----

5237-RGW

11.5 

12.4

1.5 

13.3 

4.8

2.0 

1.6 

2.9 

1.2 

3.8

2.9 

1.9 

3.3 

1. 1 

2.2

10.8 

1.2 

.4 

.6 

.7

.8 

1.3

--

--

B member of Phosphoria formation

B-17 

B-16 

B-15 

B-14 

B-13

B-12 

B-ll 

B-10 

B- 9 

B- 8

B- 7 

B- 6 

B- 5

Mudstone-- ------ --- - _______

Sandstone - - - ------ -

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

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

5236-MAW

1.7 

.7 

. 5 

1.3 

1.7

1.0 

1.0 

.9 

1.7 

1.0

1.5 

.9 

.6

3.3 60.8
B- 4 

B- 3 

B- 2 

B- 1

Carbonate rock - - - -

Phosphate rock; fos. col. no. 12222 -- ---

5235-MAW 

5234-MAW

2.2

.9 

.5 

2.7

26.2 

32.4

7.0 

1.7

A member of Phosphoria formation

A- 4 

A- 3 

A- 2 

A- 1

Chert 

Carbonate rock; fos. col. no. 12221 -

--

1.3 

1.0 

1.0 

1.5

--

..

Tensleep formation upper part only

T- 1 

T- 2 

T- 3 

T- 4 

T- 5

T- 6 

T- 7 

T- 8 

T- 9

Sandstone - - -- - - -

Carbonate rock ----- - - -

\^rdi. fJWllCLbw i. VJltJYf OCLllUjf

--

25.8 

6.5 

33.0 

14.0 

5.0

80.4 

6.8 

10.8 

13.7

--
Dinwoody Lakes, Wyo., lot 1325

Phosphoria formation measured and sampled at a natural exposure in Dinwoody Canyon, SW^SWi sec. 6, T. 4 

County, Wyo., on the northwest flank Of the Wind River anticline. The beds dip gently to the northeast 

Section measured and sampled by J. W. Hill, M. A. Warner, H. W. Peirce and R. A. Smart in August 1

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

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thi

(

Dinwoody formation not measured

E member of Phosphoria formation top not exposed

E-13 

E-12 

E-ll 

E-10 

E- 9

E o

E- 7 

E- 6 

E- 5 

E- 4

E- 3

E- 2 

E- 1

Dinwoody- Phosphoria contact concealed by 

20 -foot covered interval but probably at or 

near top of bed E-13.

Carbonate rock, argillaceous; fos. col.

no. 12174 - 

Carbonate rock, cherty; fos. col. no. 12174 - 

Mudstone, carbonatic; fos. col. no.. 12173 ---

Chert, carbonatic; fos. cojai'rioj^ 12173 - 

Mudstone, carbonatic; fos'. col. no. 12173 -

Carbonate rock, argillaceous; fos. col. 

no. 12172 

Mudstone, carbonatic; fos. col. no. 12171 ---

--

4.8 

6.8 

3.3 

5.9 

1.6

.6 

.9 

.5 

.5 

.4

1.5 

2.2 

31.2

--

--

D member of Phosphoria formation

D-12 

D-ll 

D-10 

D- 9 

D- 8

D- 7 

D- 6 

D- 5

Mudstone fos. col. no. 12170 - - -

Mudstone, phosphatic, carbonatic; fos. 

col. no. 12169 - - -- -

Phosphate rock, argillaceous; fos. col.

w«** i n L. o

Mudstone, phosphatic, carbonatic; fos. 

col. no. 12167- -- - - -

4964- RAS

4963- RAS 

4962- RAS 

4961- RAS

7.1 

.4 

4.9 

11.9 

2.5

1.8 

.9 

.5

2.3

9.7 

17.7 

9.4

54.8

41.8 

27.8 

37.8
D- 4

D- 3

D- 2 

D- 1

Phosphate rock, argillaceous; fos. col. 

no. 12166 

Carbonate rock, argillaceous; fos. col.

nn 1 71 A5 _______________________________

Carbonate rock, cherty; fos. col. no. 12164 - 

Mudstone, phosphatic; fos. col. no. 12163 ---

4960- RAS

rr 7 ~*7 JCV.T1O

4958- RAS 

4957- RAS

1.0

4.9

5.7 

1.2

17.5

2. 1

.6 

10.0

34.0

29.4

41.9 

48.8

C member of Phosphoria formation

C

^L

C

'y c

C-24

V*r LfJ

V^ £>£>

C-21

V-* * 7 

C1 8

C -l 7

C-16

V*? * »*

 " 1*± 

P- 1 ^

V-* U

"It.

-J>

v^ * * 

c-io

7

C

o

 1

C- 6 

C- 5 

C- 4

V-* J

£ 

iMudstone, carbonatic; fos. col. no. 12162 --

Chert; fos. col. no. 12162 ---

Carbonate rock, argillaceous; fos. col. 

no. 12161 

Carbonate rock; fos. col. no. 12160 -- - -

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

Carbonate rock, cherty; fos. col. no. 12159- - 

Carbonate rock and chert; fos. col. no. 12158 

Carbonate rock and chert; fos. col. no. 12158

--

--

3.6

.5 

.9

.3

2.2

24.0

3.0

3.0

1.4 

1.0

1.6

.5

1.7

1.7

2.5

1. 1

1.5

3.0

.4

.5

4.2 

1. 1 

1.4

1 . O

.6

.7

--

--

--

--

B member of Phosphoria formation

B

e

B- 4 

B_ *

B- 2

B- 1

Sandstone, carbonatic; fos. col. no. 12157 --- 

Chert -----

Phosphate rock, carbonatic, sandy; fos. col. 

no 12156 ----_------__-_-_---_-_____---

Carbonate rock, sandy; fos. col. no. 12155 -- 

Lower beds of B member not measured.

.-

4965-HWP

1.0

.8 

.5

1. 1

1.1

--

14.7

--

30.0

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch. 

**Note incompleteness of cumulative data.
Tosi Creek, Wyo., lot 1333

Phosphoria formation measured and sampled at natural exposure near Tosi Creek, SE^, sec. 17, T. 39 N., R. 

Wyo., on the west nose of the Tosi Creek anticline. Beds strike N. 22° W. and dip 15° E« Section mea

M. A. Warner, H. W. Peirce, and R. P. Sheldon in August 1950. Samples analyzed by U. S. Bureau of M

Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thic

(f

Dinwoody formation not measured

E member of Phosphoria formation

E

- 1 a

E

_ 1 -3

 J. £ 

E-l 1

E

_ i n

7

E

. R

E

_ 7

E

f.

E

_ R

E- 4

E

_ 5

E

_ )

E

l

Dinwoody- Phosphoria contact concealed by 

covered interval but probably at or near 

top of bed E-14.

f\'\f. j

Chert - 

Chert 

Chert 

4.5

6. 1

2. 1

1.4

2. 1

1.2

6.2

2.5

2. 1

2

0

3. 1

4 ?

14.0

4. 1

D member of Phosphoria formation

D-19

D- 1 ft

D-17

D-16

D-15 

D-14

D-13

D-12 

D-ll

D-10

Chert ----

Chert -- - 

Chert 

2.4

2.0

.2

1.0

1.6

.6

? 7

1.6

2.1
D- 9 

D- 8 

D- 7 

D- 6 

D- 5

D- 4

D- 3 

D- 2 

D- 1

Mudstone- - - - - ----

Mudstone - - -- -- -

Mudstone - -' --

Phosphate rock, sandy; fos. col. no.

12209 

Mudstone, phosphatic, cherty - ----- 

5228- HWP 

5227- HWP 

5226 -HWP 

5225- HWP

.7 

2.1 

1.5 

1.8 

38.0

1.1 

.6 

1. 1 

.6

15.8 

8.3 

16.3 

9.4

36.5 

56.2 

37.5 

63.9

C member of Phosphoria formation

C-31 

C-30 

C-29

C-28 

C-27

C-26 

C-25

C-24

C-23 

C-22

C-21 

C-20 

C-19 

C-18 

C-17

C-16 

C-15 

C-14 

C-13 

C-12

C-ll 

C-10 

C- 9 

C- 8 

C- 7

C- 6

V^lltTi. \, t Od-L UwIIdll^

Phosphate rock, argillaceous; fos. col.

no. 12208 -- 

\*f cLi. UU-Lldl" A \J\*f±g £JllUi-*£JIidL-Ll-'

Carbonate rock and phosphatic carbonate

rock; fos. col. no. 12206 -- ---- 

Carbonate rock, argillaceous; fos. col.

no. 12205 

Oaroonate rock 

Oaroonate rock 

Chert 

Sandstone, cherty, and carbonatic chert --

52 24 -HWP 

5223- HWP

5222- HWP 

5221 -MAW

5220-MAW 

5219- HWP

1.5 

1.7

1.8 

1.9 

2.0

2.5 

4. 1

2.2 

2.7 

4.9

2.9 

2.1 

.5 

3.5 

1.9

3.3 

1.5 

.7 

2.2 

3.8

5.0 

1.6 

2.4 

1.8 

2.0

.5

1.3 

1.6

17.3 

11.4

6.6 

2.2

61.7 

61.8

27.4 

14.2

6.7 

70.4

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su

** Note incompleteness of cumulative data.
Tosi Creek Continued

Bed 

no.

C- 5 

C- 4 

C- 3 

C- 2 

C- 1

Rock description

Chert; fos. col. no. 12204 -- -

Chert 

/"^ V* A w*^ _

Chert -- -- - ----

Sample 

no.

5218- HWP

Thickness 

(feet)

1.4 

3.5 

3.8 

6.0 

2.9

Chemical analyses 

(percent)

P2°5

1.5

Acid 

insoluble

61.8

Cum

thi

(

B member of Phosphoria formation

B- 4

- o

~ ft

i

Chert, phosphatic, and argillaceous

5217- HWP

5216- HWP

5215- HWP

5214- HWP

. o

.4

2.3

14.8

4.6

1 Q ft

Lo , O

46.7

10.5

£»^l . I/

6.6

A member of Phosphoria formation

A- 7

A- 6

^ A A

tt. ~

£«

.n * 

Carbonate rock, cherty; fos. col. no.

12203 -- 

Chert, sandy; fos. col. nos. 12202 and 

12201 ----------------------------------

Chert - --- --- --

6.0

3.0

3. 1

1.9

2.0

.6

Tensleep formation top bed only

T- 1 1.6 
Hoback, Wyo. , lot 1324

Phosphoria formation measured and sampled at natural exposure and road cut along U. S. Highway No. 89 in Sn

sec. 32, T. 39 N., R. 116 W., Teton County, Wyo. Beds strike N. 65" E. and dip 18" N. Section measu

Waring, M. A. Warner, R. A. Smart and H. W. Peirce in June and August 1950. Samples analyzed by U

laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thi

(

Dinwoody formation covered above

I'd- 2 

-E-d-l --

7.0 

2.0

-- -- 

Upper shale member of Phosphoria formation

U- 6

U- 5

U- 4

U- 3

U- 2

U- 1

Phosphate rock, argillaceous and

Mudstone --- - ---- - -

5269- RGW

5268- RGW

5267- RGW

C1^L£ T3/"**TTr

5265- RGW

5264 -RGW

2. 1

.9

2.1

1.0

? Q

1.1

13.2 '

6.0

6.4

11.0

5. 1

21.6

AC 7

57.0

59.7

47 ?

56.3

33.0

Rex chert member of Phosphoria formation

R

7/L

R_ 7K

R..74

R_ 71

R

"> ">

R-21

R tn

R_ 1 Q

R i n

R_ 1 7

R i A

R_ 1 R

R - 1 4

R

_ i -i

R_ 1 ">

R i i

Sandstone; fos. col. no. 12144 -

Sandstone; fos. col. no. 12143 - -

Phosphate rock argillaceous 

Mudstone, carbonatic; fos. col. no. 

12142 

(~* VioT*t o T*CTT 11 Q f*or\iic _ .. ~.

Mudstone, carbonatic - --- -

Chert .... 

/ "Vloft

5270- RGW

10.4

5.0

1.5

1.9

2.1

3

0

11.0

11.9

7.4

1.2

.9

.4

1.0

.6

2.0

4.9

22.3

7/L 7

1

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su
Hoback Continued

Bed 

no.

R-10 

R- 9 

R- 8 

R- 7 

R- 6

R- 5 

R- 4 

R- 3

R- 2 

R- 1

Rock description

mTllfllct OT"I& f*£* Y*l~iOn£l'tl f* £> f)H f*VlOT*t -.

f* Q Tf*Y\r\nsk t& T"rtf*lr« ^rtc f*rtl r\f\ 1 ? 1 __. 1

Carbonate rock, argillaceous; fos. col. 

no. 12140 -- -- ______

Carbonate rock, argillaceous; fos. col. 

no. 12139 _________

Chert ----- _ --.---_.___ _ _______________

Sample 

no.

4874- HWP

Thickness 

(feet)

2.4 

2.0 

.6 

2.1 

3.2

7.0 

3.0

5.8

7.5 

3.7

Chemical analyses 

(percent)

P2°5

2.5

Acid 

insoluble

88. 2

Cum

thic

(f

9

9

1

Phosphatic shale member of Phosphoria formation

CO 

CO

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

P-12 

P-ll

Chert, phosphatic ------- - -- --- --

Phosphate rock and carbonatic 

mudstone ----------- - ____________

Mudstone, carbonatic, concretion in bed P-29- 

Mudstone -------------- _______________

Phosphate rock, argillaceous ------------

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

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

Phosphate rock and mudstone---

Phosphate rock and argillaceous

carbonate rock --------------

Carbonate rock, argillaceous --

Phosphate rock and mudstone ------- --

Phosphate rock, argillaceous and

mudstone -------- ------ _ ______ _

Carbonate rock --------------- __-____--

Phosphate rock, argillaceous, and

carbonatic mudstone --- - - ---------

Carbonate rock, phosphatic, argillaceous -

Carbonate rock, phosphatic - --___----__-

Carbonate rock _______ _-- - _______

Carbonate rock, phosphatic, argillaceous -- 

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

Carbonate rock, argillaceous - -------- 

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

Mudstone, phosphatic, carbonatic ---- -

Carbonate rock, argillaceous, concretion---

4873-ROW 

4872-ROW

4871-ROW 

48 70-ROW

4869- 

4868- 

4867-

4866- 

4865-

ROW 

ROW 

ROW

ROW 

ROW

4864-ROW

4863-

4862-

4861- 

4860-

4859- 

4858- 

4857- 

4856- 

4855-

ROW 

ROW

HWP 

HWP

HWP 

HWP 

HWP 

HWP 

RAS

4854- RAS 

4853- RAS 

4852- RAS

2. 1

1.2

(.6)

1.9

.4

1.8 

3.5 

2.3

1.0 

2.2

1. 1

1.3 

1.8

1.4 

1. 1

2.7 

1.0 

2.5 

3.8 

2.3

1.7

1.4

(1.0)

13.6 . 

6.3

.7 

16.6

5.7 

.5 

.2

17.4 

.5

3.6 

15.3

11.2 

8.7

10.6

6.1

10.4

10.4

.4

4.7

9.4

.5

54.1

41.6

68.9

30.6

64.6

76.1

81.3

20.9

29.2

63.4

24.4

17. 1

37.9

20.3

12.5

11.7

18.7

30.8

27.2

46.5

32.4

21.3

2

2

2

2

2

2

3

3

3

3
P-10 

P- 9 

P- 8 

P- 7 

P- 6

P- 5 

P- 4 

P- 3 

P- 2 

P- 1

Phosphate rock and carbonatic mudstone ---- 

Mudstone, phosphatic, carbonatic - - -

Mudstone, carbonatic - --- 

Phosphate rock------- - - - -

Chert, phosphatic; fos. col. no. 12137- - 

4851- RAS 

4850- RAS 

4849- RAS 

4848- RAS 

4847- RAS

4846- RAS 

4845- RAS 

4844- RAS 

4843- RAS 

4842- RAS

1.3 

2.0 

1.2 

2.4 

2.6

2.2 

.6 

1.1 

.8 

.9

10. 1 

10.2 

21.4 

23.6 

2.4

2.4 

28.9 

4.4 

34.8 

13.4

34.5 

33.0 

16.8 

11.3 

2.4

1.6 

7.4 

47.3 

1.8 

57.5

Wells formation top part only

Cw-12 

Cw-11 

Cw-10 

Cw- 9 

Cw- 8

Cw- 7 

Cw- 6 

Cw- 5 

Cw- 4 

Cw- 3

Cw- 2 

Cw- 1

Sandstone---------- - ------ -

f* !3 T*hOflQ t<a T»O*"*lf __ __ _ ___ _ _

4841 -MAW 3.4 

4.5 

4.6 

5.3 

3.4

.7 

1.6 

1.3 

5.6 

3.1

1.5 

50.0

0.4 10.0 
Buck Creek, Wyo., lot 1332

Phosphatic shale and upper shale members of Phosphoria formation sampled in two hand trenches in Buck Cree

Hoback Forest Camp, SE^, sec. 1, T. 38 N., R. 115 W., Teton County, Wyo., on the trough of a syncli

of the Bear Creek thrust fault. Beds P-l through P-33 sampled in trench on west side of Buck Creek a

west side of Buck Creek and about 1/8 mile to the south. Beds in upper shale trench strike N. 10° E. a

phosphatic shale trench strike N. 80' E. and dip 15° S. Section measured and sampled by R. G. Waring

and J. W. Hill in July 1950. 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

Cum

thic

(f

Dinwoody formation not measured

Upper shale member of Phosphoria formation

U- 9 

U- 8 

U- 7 

U- 6 

U- 5

U- 4 

U- 3 

U- 2 

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

no. 12151 1 ----

4956-MAW 

4955-MAW 

4954-MAW 

4 953 -MAW 

4952-MAW

4951 -MAW 

4950-MAW 

4949-MAW

4948-MAW

3.6 

2.9 

4.6 

4.8 

3.5

4.4 

.9 

4.4

1.0

0.3 

10.9 

4.8 

3.9 

3.6

3.6 

22.8 

3.3

26.5

64.6 

57. 7 

48.7 

48.6 

48.4

50.5 

19.0 

57.4

24.8

Rex chert member of Phosphoria formation not measured

Phosphatic shale member of Phosphoria formation

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

Phosphate rock ----------------- ------

Phosphate rock and mudstone; fos. col. 

no. 12149 --- 

iriiospiiate rocK, argilxaceous 

Carbonate rock, argillaceous and mudstone - 

Phosphate rock, argillaceous and mudstone -

4947- HWP 

4946- HWP 

4945- HWP

4 944 -HWP 

4 943 -HWP

4942- HWP 

4941 -HWP 

4 940 -HWP 

4939- HWP 

4938- HWP

4937- HWP 

49 36 -HWP 

4935- RGW 

4934- RGW

2.0 

.8 

.8

2.0 

1. 1

.8 

1.3 

3.2 

2.6 

.8

2.3 

1.5 

1.7 

1.2

1.4 

29.2 

2.6

20.8 

.5

4.9 

3.4 

1. 1 

1.3 

23.0

2.5 

15.0 

.3 

7.4

14.3 

12.3 

30.3

26.1 

69.9

51.4 

60. 1 

63.3 

76.6 

1 18.2

49.8 

34.3 

16.3 

49.2
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

Mudstone and phosphatic mudstone - --

Mudstone, carbonatic -- - --- -- 

Carbonate rock, argillaceous, and

phosphatic mudstone -------- -- ----

Phosphate rock, argillaceous, carbonatic; 

fos. col. no. 12146 - 

Phosphate rock -- -- -- -- - --

JT L 1 \Jt3jJL LCi L^Z 1 l?l>A.£ CLJ. g.Ll.LGL\*C? \JUi3

Phosphate rock --- -- -- -- 

4933- RGW 

4932- RGW 

4931- RGW 

4930- RGW 

4929- RGW

49 28 -RGW 

4927- RGW

4926- RGW 

4925- RGW

4924- RGW

4923- RGW 

4922- RGW 

4921 -RGW 

4920- RGW 

4919-RGW

4918- HWP 

4917-HWP 

4916- HWP 

49 15- HWP

1.0 

2. 7 

.8

1. 1 

1.9

1.0

1.4

2.0 

1.2

1.0

.6 

.8 

.8 

1.5 

.8

.6 

1.2 

1.5 

1.0

9.3 

20.8 

1.7 

8.5 

4.6

.3

5.1

6.2

2.4

12.6

1.3 

24.2 

20.3 

33.2 

3.1

30.4 

3.9 

28.0 

30.5

21.8 

15.0 

4.1 

50. 1 

56.6

25.6 

41.1

35.5 

16.6

26.2

6.1 

11.0 

17.8 

1.6 

2.2

5.4 

62.0 

10.9 

10.8

Wells formation top bed only

Cw-1 49 14- HWP 1.8 5.7 19.6 

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su
South Fork of Gypsum Creek, Wyo., lot 1336

Phosphoria formation measured and sampled on the South Fork of Gypsum Creek, NW^ sec. 22, T. 38 N., R. 109 

Wyo., on the east limb of an overturned syncline in the overridden block of a thrust fault. Beds have an 

W. and dip from 80° W. to 45° E. A large fault partially repeats the section. Section measured and sam

by R. P. Sheldon, R. A. Smart, and R. G. Waring in August 1950. Samples analyzed by U. S. Bureau of M

Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analys

(percent)

P2°5

Ac

inso

Dinwoody formation basal beds only

l-d-4 

1-d- 3 

1-d- 2 

1-d-l

.

--

5.3 

3.5 

1.7 

.9

..

-

E member of Phosphoria formation

E-15 E-14 ' 

E-13

E-12 

E-ll

E-10 

E- 9 

E- 8 

E- 7 

E- 6

E- 5 

E- 4 

E- 3 

E- 2 

E- 1

Carbonate rock, argillaceous; fos. col.

Carbonate rock; fos. col. no. 12246 --- - 

Carbonate rock", argillaceous; fos. col. 

no. 12246 

Chert 

Mudstone, phosphatic and phosphate rock -- 5263- RAS

4.3 

5.6

5.2

10.6

5.3

3.2 

3.8 

3. 1 

12. 1 

1.3

6.3 

2.3 

1.0 

3.2 

1. 1

19.7 24

D member of Phosphoria formation

D-20 

D-19 

D-18 

D-17 

D-16

D-15

Phosphate rock and mudstone-- ~ - - 5262- RAS

5.4 

3.4 

2.4 

1. 1 

.8

2.8

9.8 51
D-14 

D-13 

D-12 

D-H 

D-10

D- 9 

D- 8 

D- 7 

D- 6 

D- 5

D- 4 

D- 3

D- 2 

D- 1

Chert 

Mudstone - -- - - - --

Fault .contact at this point.

5261 -RAS

5260-RGW 

5 2 59 -ROW

. 7 

3.3 

2.9 

. 5 

5.8

4. 1 

2.5 

6.6 

3.2

2.7

.7 

1.7

1.0 

2.3

12.0

13.0 

9.5

42

41

52

C member of Phosphoria formation

C-21 

C-20 

C-19 

C-18 

C-17

C-16 

C-15 

C-14 

C-13 

C-12

C-11 

C-10 

C- 9 

C- 8 

C- 7

C- 6 

C- 5 

C- 4 

C- 3 

C- 2

C- 1

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

A strike fault separates C-l (above) and brecciated top of E-7(next page); E units dip 80° 

W., overturned C units dip 65* E. Repeated 

unit numbers do not imply correlation.

--

3.9 

4.3 

7.2 

3.5 

7.7

7. 1 

8.8 

4.7 

6.4 

1.6

3.2

4.5 

1.3 

.3 

2.6

2.8 

5.0 

1.3 

1.5 

1.4

.5

--

-

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Surv
South Fork of Gypsum Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analys

(percent)

P2°5

Ac

inso

E member of Phosphoria formation

E- 7 

E- 6 

E- 5

E- 4 

E- 3

E- 2 

E- 1

Chert ----- ... _..._....

Phosphate rock, chert, and phosphatic 

mudstone; fos. col. no. 12245- ------------

Chert ----------- ---_. ..... 

5258- RPS

18.0 

7.5

1.3 

8.0 

3.0

1. 1 

4.0

16.2 52

D member of Phosphoria formation

D-13

D-12

D-ll

D-10

D- 9

D

o

D- 7

D- 6

D- 5

D- 4

D- 3

D- 2

D- 1

fhor-t __ __ _ _ _ ___

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

l\yf iiH ctiTno on "phriTiQ fio ________ _ _

Sandstone, phosphatic; fos. col. no. 12243 ----

5257- RGW

5256- RGW

8

0

.3

.5

5.9

1.9

.6

7.3

2.0

6.0

3.0

3.0

2.0

11.5

_ *

13.4

K? 

43

C member of Phosphoria formation

r-13

C-12

C-ll

C-10

^f 7

C

O

C- 7 

Cf

C- 5

Tt

Beds D- 1 and C - 1 3 separated by a fault contact.

Carbonate rock, argillaceous; fos. col. no.

Carbonate rock, phosphatic, sandy; fos. 

col. no. 12239 - -- ---------

Mudstone; fos. col. no. 12238 - ---- ------

Carbonate rock; fos. col. no. 12238----- 

Sandstone, carbonatic; fos. col. no. 12238 ----

Carbonate rock, sandy; fos. col. no. 12237 ----

5255- RGW

--

--

3.0

5.3

1 P.

1.7

7.2 

1.8

5.1 

7.7

31.0

H o

--

--

?0 

-

-
C- 3 

C- 2 

C- 1

Carbonate rock; fos. col. no. 12236 - - -

--

8.0 

23.0 

4.0 __ _

B member of Phosphoria formation top bed only

B- 1

Covered interval, probably includes 

Phosphoria-Tensleep contact.

1.0 

45.0

Tensleep formation upper beds only, top not exposed

T- 3 

T- 2

T- 1

Sandstone - - - -- 

Covered interval. Shows sandstone 

float similar to bed T-l. - --

 " " 15.0

15.0 

20.0

-- -

CO 

CD
Bartlett Creek, Wyo., lot 1334

Upper part of C member and part of D member of Phosphoria formation measured and sampled at natural exposu

SE£ sec. 23, T. 38 N., R. Ill W., Sublette County, Wyo., on the southwest limb of the Rock Creek anticl

south. Section measured and sampled by M. A. Warner and H. W. Peirce in August 1950. Samples analy

Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analys

(percent)

P2°5

Ac

inso

D member of Phosphoria formation top not exposed

D-14 

D-13 

D-12 

D-ll 

D-10

D- 9 

D- 8 

D- 7 

D- 6 

D- 5

D- 4

D- 3 

D- 2 

D- 1

Mudstone; fos. col. no. 12218 --- --- 

Mudstone, carbonatic; fos. col. no. 12217 --- 

Phosphate rock, argillaceous; fos. col.

no. 12214 -- 

5233-HWP 

5232-HWP

5231-HWP

5230-HWP 

5229-HWP

1.5 

2.7 

1.4 

11.7 

5.9

4.6 

3.2 

6.8 

1.0

1.2

1.2 

1. 1 

2.5 

1.2

26.5 

2.8

20.5

6.6 

15.6

12

45

26

65

23

C member of Phosphoria formation upper beds only

C- 5 

C- 4 

C- 3 

C- 2 

C- 1

Chert, sandy ---- - _______ 

v^3i*DOH3t6 rocK, pnospricLtic ** *"" ** 

V-'GLl UvXICLLC J. \s\*I*.t CL1 t£ J.i.J.GLV'dJllS

Carbonate rock, argillaceous .

3.0 

2.4 

3.4 

7.0 

15.0

--

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S, Geological S
Bull Lake, Wyo., lot 1328

Phosphoria formation measured and sampled at natural exposure near the head of Bull Lake in sec. 6, T. 2 N., 

Wyo. Beds strike N. 50° W. and dip 19° NE. Section measured and sampled by H. W. Peirce, R. G. Wa

M. A. Warner in August 1950. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, Oreg.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analy

(percent)

P2°5

A

inso

Dinwoody formation not measured

1-d-l -- -- -- 

E member of Phosphoria formation

E-18 

E-17 

E-16 

E-15 

E-14

E-13 

E-12 

E-ll 

E-10 

E- 9

E- 8 

E- 7 

E- 6

E- 5 

E- 4

E- 3 

E- 2 

E- 1

Carbonate rock, cherty; fos. col. no. 12267 -

Chert and carbonatic mudstone; fos. col. 

no. 12265 

Chert; fos. col. no. 12265 ------ --- - 

Chert and carbonatic mudstone; fos. col. 

no. 12265 

--

6.4 

5.4 

1.2 

1.8 

5.4

3.2 

3.0 

1.6 

3.5 

.3

3.8 

.9

1.0 

4.8

3.2

2.5 

4.9 

2.0

--

D member of Phosphoria formation

D-19 

D-18 

D-17 

D-16 

D-15

D-14 

D-13

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

5173-RGW 

5172-HWP

1.1 

2.4 

9.7 

5.0 

7.0

.9 

4.6

10.5 

14.1

4

4

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological S
Bull Lake Continued

Bed 

no.

D-12 

D-ll 

D-10 

D- 9 

D- 8

D- 7 

D- 6 

D- 5 

D- 4 

D- 3

D- 2 

D- 1

Rock description

Phosphate rock -- - - ----

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

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

Mudstone, carbonatic - - -- 

Phosphate rock, argillaceous; fos. col.

Sample 

no.

5171-RAS 

5170- RAS

Thickness 

(feet)

1.8 

.5 

3.8 

4.5 

.1

1. 1 

.6

1.4 

4.7 

3.8

4.4 

.8

Chemical analys

(percent)

P2°5

18.4 

18.4

Ac

inso

33

35

C member of Phosphoria formation

C-52 

C-51 

C-50 

C-49 

C-48

C-47 

C-46 

C-45 

C-44

C-43

C-42 

C-41 

C-40 

C-39 

C-38

C-37 

C-36 

C-35 

C-34 

C-33

C-32 

C-31 

C-30 

C-29 

C-28

Mudstone, carbonatic; fos. col. no. 12263 ---- 

Mudstone, carbonatic; fos. col. no. 12262 - 

Mudstone, carbonatic; fos. col. no. 12261 ----

Chert; fos. col. no. 12260 ------ - 

Mudstone, carbonatic; fos. col. no. 12259 ---- 

Mudstone, carbonatic; fos. col. no. 12259 ---- 

Mudstone, carbonatic; fos. col. no. 12258 ---- 

Carbonate rock, argillaceous; fos. col.

Mudstone, carbonatic; fos. col. no. 12257 -- 

Sandstone, carbonatic - - - --- 

Sandstone, carbonatic and carbonate rock ---

Carbonate rock - --- 

PVlOT-t ------------------------------------

Mudstone - - - - - --- 

Carbonate rock - -- - - - 

--

2. 1 

3.8 

3.2 

3.2 

4.0

1.6 

.5 

2.0

1. 1 

1.8

3.6 

2.9 

4.2 

1. 1 

6.5

8.0 

2.8 

3.9 

.9 

1.0

.3 

.6 

. 1 

5.3 

1. 1

-.
C-27 

C-26 

C-25 

C-24 

C-23

C-22 

C-21 

C-20 

C-19 

C-18

C-17 

C-16 

C-15 

C-14 

C-13

C-12 

C-ll 

C-10 

C- 9 

C- 8

C- 7 

C- 6 

C- 5 

C- 4 

C- 3

C- 2 

C- 1

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

\sCLlL UvIiCtLv? JL Wv^JV

Vu/cL.1 UVllCLLC .1 U^XV^ V^llwi Ijr

Mudstone - - ------ - ___._

PVnar-t ....................................

Cs&iTDonsLte roclc 

Mudstone - - - - - 

5169-RAS

2.6 

3.4 

3.2 

7.4 

.7

.9 

.9 

2.7 

3.6 

.7

.7 

1.3 

2.0 

3.7 

3.0

.5 

1.8 

1.9 

5. 1 

2.2

1.6 

1.6 

1.0 

1.1 

.9

1.2 

4.7

1.3 63

B member of Phosphoria formation

B- 8 

B- 7 

B- 6 

B- 5 

B- 4

B- 3 

B- 2 

B- 1

Mudstone - - - -- - 

Carbonate rock; fos. col. no. 12255 -- - 

Carbonate rock; fos. col. no. 12255 -- - 

Mudstone, carbonatic; fos. col. no. 12254 - 

Sandstone; fos. col. no. 12253 -- - 

5168-RAS 

5167-RAS

0.1 

.1 

.2 

.7 

1.6

.5 

.6 

3.1

13.3 

15.0

45

4

A member of Phosphoria formation

A-21 

A-20 

A-19

A-18

Sandstone - -- - - - 

Sandstone and chert; fos. col. no. 12252 -----

12251 - 

Carbonate rock; fos. col. no. 12250 -- - 

--

2.4 

.4

1.1 

3.2

--
Bull Lake Continued

Bed 

no. Rock description

Sample 

no.

Thickness 

(feet)

Chemical analy

___(percent)_

P2°5

A

inso

A-17 Carbonate rock, cherty; fos. col. no. 12249 ---

A-16 Carbonate rock -------------- ____________

A-15 Sandstone - - - - -- - -- -

A-14 Carbonate rock - ------ --- - _________

A-13 Chert 

A-12 Carbonate rock; fos. col. no. 12248 - - -

A-11 Chert-------------------------------------

A-10 Sandstone, carbonatic -------------- ______

A- 9 Chert 

A- 8 Limestone, carbonatic _____ --- ------ -

A- 7 Sandstone, carbonatic ----------------- ---

A- 6 Sandstone, carbonatic, sandstone, and

carbonate rock - - - _____ ______ _

A- 5 Sandstone, carbonatic - --- --- ---------

A- 4 Sandstone, carbonatic, and carbonatic chert -_ 

A- 3 Mudstone, carbonatic------------ - ------

co A- 2 Sandstone, carbonatic ______ __- ______ _

A- 1 Sandstone, carbonatic ------------------- -

Phosphoria formation unconformable on 

Tensleep formation with up to 2 feet of 

relief at contact.

2.0 

2.4 

1.6 

2. 1 

2.2

7. 1 

4.8 

5.0 

3.5 

3.5

5.3

2.7 

1.0 

1.6 

1.8

1. 1 

2.7

Tensleep formation not measured

T- 1 Sandstone
Conant Creek, Wyo., lot 1330

Phosphoria formation measured and sampled in a bulldozer trench near Conant Creek, SiSE? sec. 31, T. 33 N

Wyo. Beds strike No 35° W. and dip 31° N. Section measured and sampled by H. W. Peirce, M. A. W

Waring in August 1950. Due to weathering, probable faulting, and covered intervals, the section is po

divisible into members. 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

Cum

thi

(

Dinwoody formation not measured

Phosphoria formation base not exposed

CO

tn

P-64 

P-44 

P-43 

P-42 

P-41

P-40

P-39 

P-38

Carbonate rock, argillaceous

P-63 Carbonate rock, argillaceous

P-62 Carbonate rock, argillaceous

P-61 Mudstone

P-60 Mudstone

P-59 Chert, argillaceous

P-58 Mudstone

P-57 Mudstone, cherty --------- ,-

P-56 Mudstone; fos. col. no. 12235

P-55 Carbonate rock; fos. col. no. 12235

P-54 Mudstone

P-53 Chert and phosphatic mudstone

P-52 Mudstone and chert

P-51 Mudstone and chert

P-50 Chert

P-49 Mudstone

P-48 Mudstone

P-47 Chert and mudstone; fos. col. no. 12234---- 5213-RAS

P-46 Mudstone and argillaceous phosphate rock - 5212-RAS

P-45 Phosphate rock, argillaceous, carbonatic-- 5211-RAS

Mudstone, carbonatic; fos. col. no. 12233 

Mudstone, carbonatic; fos. col. no. 12232 

Mudstone, carbonatic; fos. col. no. 12231 

Phosphate rock, argillaceous; fos. col.

no. 12230 -- - - 

Chert --- ----- - - --_-

Mudstone, phosphatic, carbonatic 

Mudstone, phosphatic, carbonatic

5210-RAS 

5179-RAS 

5178-RAS

5177-RAS 

5176-RAS

5175-RAS 

5174-RAS

13.7 

5.8 

2.3 

4.4 

3.6

2.2 

4.6 

4.9 

2.6 

1.8

2.7 

3.9 

1.3 

1.5

1.9

1.2

1.3 

1.5 

1.8 

1.0

2.5 

2.9 

1.0

.5 

.6

1.6 

2.0

4.3

11.6

14.9

2.7 

3.9 

3.2

16.4 

.8

8.0 

9.2

64.9

39.9

27.4

42.4

41.8

42. 1

40.2

60.2

44.1

30.6

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su

** Note incompleteness of cumulative data.
Conant Creek Continued

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)___

P2°5

Acid 

insoluble

Cum

thic

(f

P-37 Carbonate rock; fos. col. no. 12228 -- --

P-36 Carbonate rock -----------------------

P-35 Carbonate rock ------- --- ---------

P-34 Carbonate rock --------------- --- -

P-33 Carbonate rock - --------- --- --__

P-32 Carbonate rock --------------- --- -

P-31 Carbonate rock ---- -------- _______

P-30 Carbonate rock - --- ---- - -

P-29 Carbonate rock ---- - -- ------

P-28 Carbonate rock 

P-27 Carbonate rock - ------ ____________

P-26 Carbonate rock - --------------------

P-25 Carbonate rock, argillaceous ------- --

P-24 Mudstone, carbonatic - ___---- ____-

P-23 Mudstone, carbonatic - ----- -

P-22 Mudstone, carbonatic --- ------------

P-21 Mudstone - 

P-20 Mudstone - -- 

o? P-19 Covered interval -- __--- --- 

P-18 Mudstone - 

P-17 Mudstone -- - - - -

P-16 Mudstone -- - --- - ______ _

P-15 Mudstone, carbonatic -------- _ - _

P-14 Mudstone - - - - - -

P-13 Mudstone - - -- --

P-12 Mudstone, carbonatic --- -- -- --

P-ll Carbonate rock - -- - - --

P-10 Carbonate rock - -----____ --- ____

P- 9 Carbonate rock - ---- ______ ___ _

P- 8 Mudstone, carbonatic------------------

P- 7 Carbonate rock _ ---- --- _______

P- 6 Carbonate rock, argillaceous -- -- 

P- 5 Carbonate rock, argillaceous - 

P- 4 Carbonate rock - - __------_-_-_----

P- 3 Sandstone, carbonatic and carbonate rock

P- 2 Sandstone, carbonatic ------ _________

P- 1 Carbonate rock, argillaceous ---- ---- 3.0

2.2 

1.3 

2.6 

1.6 

2.8

4.8 

2.5 

4.6 

3.1 

3.7

3.4 

3.7 

4.5 

3.0 

5.3

2.1

6.7

30.3

38.0

3.8

4.2 

6.6 

3.2 

4.2 

6.6

5.9 

7.0 

4.1 

5.4 

4.4

6.3 

1.6 

1.8 

1.4 

2.0

7.0 

3.0

1

1

1

1

1

1

1

1

1

1

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2

2
Poison Creek, Wyo., lot 1331

Phosphoria formation sampled in bulldozer trench on west flank of anticline near the head of Poison Creek, NE

R. 117 W., 4 miles northwest of Labarge Ranger Station, Lincoln County, Wyo. Beds strike N. 14* W. 

measured and sampled by R. G. Waring and M. A. Warner in July 1950. Samples analyzed by U. S. Bur

Albany, Oreg.

CO

-o

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Cum

thi

(

Rex chert member of Phosphoria formation basal bed only

R- 1 -- 11.0 -- -- 

Phosphatic shale member of Phosphoria formation

P-61 

P-60 

P-59 

P-58 

P-57

P-56 

P-55 

P-54 

P-53 

P-52 

P-51

P-50 

P-49 

P-48 

P-47 

P-46

P-45 

P-44 

P-43 

P-42 

P-41

P-40 

P-39 

P-38 

P-37

» jr.. J e^rf-wi t*

iviuuo tune? 

5 143 -ROW 

5142- ROW 

5141 -ROW 

5140- ROW 

5139-RGW

5138- ROW 

5137- ROW 

51 36- ROW 

5 135- ROW 

5134- ROW 

5133- ROW

5132- ROW 

5131 -MAW 

5130-MAW 

5129-MAW 

5128-MAW

5 127 -MAW 

5126-MAW 

5125-MAW 

5124-MAW 

5 123 -MAW

5122-MAW 

51 21 -MAW 

5120-MAW 

5119-MAW

0.3 

1.8 

3.8 

1.5 

1.8

3.2 

.8 

.6 

1.0 

2.0 

1.5

.7 

1.2 

2.0 

1.8 

1.0

.7 

.8 

.5 

.7 

1.3

1.1 

1.0 

.9 

3.5

4.4 

.9 

1.0 

1.1 

.3

1.7 

11.3 

31.5 

34.8 

.4 

32.2

31.5 

11.7 

1.3 

5.4 

21.0

16.2 

.5 

.3 

.4 

2.3

2.7 

5.8 

7.7 

.9

58. 1 

46.4 

53.4 

65.5 

31.6

59.0 

11. 1 

6.2 

2.8 

61.0 

5.8

11.3 

56.6 

77.0 

65.3 

25.6

32.7 

72.4 

67.4 

71.7 

71.6

76.9 

67.6 

62.5 

57.5

Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Su
Poison Creek Continued

Bed 

no.

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

3 

3

P-24 

and 

P-25

P-25 

P-24 

P-23

P-22 

P-21 

P-20 

P-19 

P-18

P-17 

P-16 

P-15

Rock description

Phosphate rock and phosphatic mudstone ---

Phosphate rock; fos. col. no. 12313 --------

V^A'L UWlldtC L \J\*cL

A fault occurs at the base of sample 

4998-MAW. Sample 4997-MAW repeats 

lower part of sample 5107-MAW and upper 

part of sample 5 106 -MAW.

A fault occurs at the base of sample 

4997-MAW. Beds P-25 through P-22 

are repeated.

Phosphate rock; fos. col. no. 12312 --------

X^CU. UUllcLLG -L V/l/A.^ Cli ££J.l.JLCil*GUUi9 i.C113

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

TV/I nrfo fon^ r*Q "phon sati r*

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

Sample 

no.

5118-MAW 

5117-MAW 

5116-MAW 

5115-MAW 

5114-MAW

5113-MAW 

5112-MAW 

5111-MAW 

5 110 -MAW 

5109-MAW

5108-MAW 

5107-MAW 

5106-MAW 

4999 -MAW 

4998-MAW

4997-MAW

4996-MAW 

4995-MAW 

4994-MAW 

4993-MAW

4992-MAW 

4991-MAW 

4990-MAW 

4989-RGW 

4988-RGW

4987- RGW 

4986- RGW 

4985- RGW

Thickness 

(feet)

2.4 

1.9 

3.8 

4.2 

2.7

2. 1 

2.6 

2.3 

2.5 

2. 5

1.2 

2.4 

1.0 

3.2 

3.7

(2.2)

2.4) 

1. 1 

3.3 

(1.8

(2.1) 

1.8 

2.8 

2. 5 

2. 1

2. 1 

1.5 

2.2

Chemical analyses 

(percent)

P2°5

7.2 

8.6 

8.5 

1.7 

9.7

19.3 

23.4 

2.5 

9.8 

19.6

16.7 

34.4 

23.8 

.2 

.6

23.0

34.2 

15.7 

.6

.4

.9 

.5 

.6 

.5 

.6

.4 

.6 

1. 5

Acid 

insoluble

46.8 

53.7 

40.9 

40.8 

41.3

25.8 

18.2 

11.7 

17.0 

23.8

35.2 

7.7 

24.6 

29.6 

11.8

32.8

5.6 

47.7 

12.7 

44. 1

76.4 

84.9 

71.2 

78.7 

69.9

62. 1 

53.5 

53. 1
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

TUf 1 1 A c t t\n A i"» *i T»V^ fiTi 3 1 1 r*

Mudstone, carbonatic, and eherty

f"*3 Y'V^oTi 3 to f*r\f*\p n T»efi 11 r» r*c»rtii Q ji.ji.ji.

Carbonate rock, argillaceous; fos. col. nos. 

123.10 and 12309 

Phosphate rock, argillaceous; fos. col. 

no. 12308 

4984- RGW 

4983 -RGW

4982- RGW 

4981- RGW

4980- RGW

4979- RGW 

49 78 -RGW 

4977- RGW 

49 76 -RGW 

49 75 -RGW

49 74 -RGW 

49 73 -RGW 

4972- RGW

4971 -RGW

1.0 

1.7

1.8 

1.7

2.4

1.3 

1.8 

3.2 

2.0 

2.8

1.0 

1.0 

1. 1

.6

1.4 

.6

2.5 

.4

1.5

.6 

3.9 

.6 

.8 

1.2

1. 1 

1. 7 

1.8

18.4

51.5 

56.4

54.4 

21. 7

27.0

6.4 

20.6 

34.5 

23.3 

23.0

38.5 

26.0 

10.8

19.8

1

1

1

1

1

1

1

1

Wells formation top part only

Cw-8 

Cw-7 

Cw-6 

Cw-5 

Cw-4

Cw-3 

Cw-2 

Cwl

--

2.0 

4.0 

3.7 

1.9 

4.0

.5 

2.0 

2.0

--

--
Raymond Canyon, Wyo., lot 1312

Upper phosphate zone of the phosphatic shale member of Phosphoria formation measured and sampled on east 

cline in Raymond Canyon crosscut, NW^NE* sec. 6, T. 26 N., R. 119 W., Lincoln County, Wyo. Beds 

north and south. Section measured by M. E. Thompson and R. A. Smart and sampled by Smart in Septe

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

Cum

thic

(f

Phosphatic shale member of Phosphoria formation upper part only, top not expose

P-16 Phosphate rock, argillaceous - - - 4558-RAS

P-15 Mudstone -- 4559-RAS

P-14 Mudstone, carbonatic - - --- 4556- RAS

P-13 Mudstone, carbonatic 4555- RAS

P-12 Carbonate rock, argillaceous -- 4560- RAS

P-11 Phosphate rock ---- _-- 4554-RAS

P-10 Phosph&te rock, carbonatic --- - - --- 4553- RAS

P- 9 Phosphate rock, argillaceous, carbonatic 4552- RAS

P- 8 Phosphate rock, argillaceous --- ----- 4551- RAS

P- 7 Phosphate rock -- 4550- RAS

P- 6 Phosphate rock, argillaceous -- - - 4559- RAS

P- 5 Mudstone, carbonatic- ----- 4543-MET

P- 4 Phosphate rock - 4542-MET

P- 3 Phosphate rock, argillaceous--- - --- 4541-MET

P- 2 Mudstone, carbonatic - -------- ____ 4540-MET

P- 1 Carbonate rock, argillaceous, phosphatic 4539-MET

0.4 

1.0 

4.4 

1.1

1. 1

.8

2. 1 

.4 

.9

1. 1

1.1 

2.1 

3.2 

2.2

3.2 

4.6

24.3

4.7

.9

4.2

5.4

24.4

18.1

15.3

27.8

30.3

22.3

2.2

25.0

15.3

4.8 

9.6

15.5

60.6

58.0

56.0

29.3

13.3 

2.8

27.9

28.0 

6.7

23.7

40.2

14.2

35.6

50.0

26.2
Cokeville, Wyo. , lot 1289

Phosphoria formation sampled lj miles northeast of Cokeville, Wyo., NWi sec. 4, T. 24 N., R. 119 W., Lincoln Cou

north-plunging anticline. Samples were cut from two hand trenches in the phosphatic shale member. Beds st

Section measured by R. P. Sheldon, R. G. Waring, D. F. Davidson, R. A. Smart, F. J. Anderson, and W. R. R

Smart, M. A. Warner, and A. M. Gutstadt in June 1949. Samples analyzed for P2Oe and acid insoluble by U. 

Albany, Oreg., and for other constituents by Trace Elements Section laboratory, Washington, D. C.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses (percent)

P2°5 A1203 Fe2°3

Loss on 

ignition

Acid 

insolu

Rex member of Phosphoria formation basal bed only

R - 1 5.0 

Phosphatic shale member of Phosphoria formation base not exposed

P-199 

P-198 

P-197 

P-196 

P-195

P-194 

P-193 

P-192 

P-191

P-190

P-189 

P-188 

P-187 

P-186 

P-185

P-184 

P-183 

P-182 

P-181 

P-180

P-179 

P-178 

P-177 

P-176 

P-175

Upper trench

Carbonate rock, argillaceous 

Mudstone, carbonatic - ---- 

Carbonate rock, argillaceous 

Mudstone, carbonatic-- - 

Carbonate rock, argillaceous

Mudstone, carbonatic - -------

Mudstone, carbonatic -- ------

Mudstone, carbonatic -- - --

Phosphate rock, carbonatic, and

carbonatic mudstone -

Carbonate rock, argillaceous ---

Mudstone, carbonatic --- 

Phosphate rock, argillaceous 

Mudstone, phosphatic -------

Carbonate rock, argillaceous 

Mudstone, carbonatic -- ---

Mudstone, carbonatic -- - 

Mudstone -- - -- - 

Mudstone, carbonatic-- 

Mudstone, carbonatic -------

Carbonate rock, argillaceous

Carbonate rock, argillaceous 

Carbonate rock, argillaceous 

Phosphate rock, argillaceous 

Mudstone, carbonatic -------

Mudstone, carbonatic -- ---

3751-

3746-

3747-

3748-

3749-

3750-

3721-

3722-

3723-

3724-

3711-

3712-

3713-

3714-

3715-

RPS 

RPS 

RPS 

RPS 

RPS

RPS 

RPS 

RPS

RPS 

RPS

RAS 

RAS 

RAS 

RAS 

RAS

3716- RAS

3717- RAS

3718- RAS

3719- RAS

3720- RAS

3691- RAS

3692- RAS

3693- RAS

3694- RAS

3695- RAS

0.6 

.4 

.4 

.4 

.7

.8

.7

3.2

.4 

3.4

1.1

.8

1.3

1.5

1.6

1.2 

2.3 

2.0

.4 

1.4

1.9 

1.7 

.9 

1. 1 

1.0

1.2 

1.5

.9 

1.8

.9

4.2 

1.5 

3.2

18.8 

.7

2.6 

17.2

9.4 

.3 

.7

.7 

1.0 

1.0 

3.0 

1.0

.5

1.5

19.3

2.0

1.1

30.

47.

29.

51

29

51.

66.

58. 

19

24.

40

38

54.

20

49.

48

69

50

57

35.

19

39

32

61

56
Cokeviile Continued

Bed

no.

P-174 

P-173 

P-172 

P-171

P-170

P-169 

P-168 

P-167 

P-166 

P-165

P-164 

P-163 

P-162 

P-161 

P-160

P-159 

P-158 

P-157 

P-156 

P-155

P-154 

P-153 

P-152 

P-151 

P-150

P-149 

P-148

P-147 

P-146 

P-145

P-144 

P-143

P-142 

P-I41

Rock description

/"^gkfwWfvrvQ 4- A ff\f^\F a T'fF'l 1 la f* 15* fUll Q

Phosphate rock, argillaceous, and 

phosphatic mudstone -- -

Mudstone, carbonatic -

Mudstone - --- - - -

Mudstone - -- 

Mudstone - - ---- 

T^fYfjcFfc Visits i^fw^lr r*Q yVionQ ^i r*

Mudstone, carbonatic and carbonate rock -

Phosphate rock-- -- -- -

Phosphate rock - -- --

*D V» f\C rkVvft t C* T* f"W* \f

Mudstone, phosphatic - - 

Carbonate rock, argillaceous, and

Phosphate rock and mudstone - --

Carbonate rock, argillaceous, lens (?) 

in bed P-143 

Mudstone -- - - 

Phosphate rock and carbonatic phosphate

Sample 

no.

3696- RAS 

3697- RAS 

3698- RAS

3699- RAS 

3700- RAS

3601 -DFD 

3602- DFD 

3603- DFD 

3604- DFD 

3605- DFD

3606- DFD 

3607- DFD 

3608- DFD 

3609 -DFD 

3610- DFD

3621 -DFD 

3622- DFD 

3623 -DFD 

3611-RGW 

3612-RGW

3613-RGW 

3614-RGW 

3615-RGW 

3616-RGW 

3617-RGW

3618-RGW

3619-RGW 

3631-RGW 

3632-RGW 

3633-RGW

3634-RGW 

3635-RGW

3636-RGW 

3637-RGW

363 8 -ROW

Thickness 

(feet)

2.3 

2.0 

.8

2.2

2.1

.9 

1.8 

.5 

.'9 

.9

1. 1 

.8 

.9 

.4 

.8

.6 

.6 

.9 

1.0 

1.0

.6

.5 

.55 

1.0 

1.1

.75

2.4 

1.2 

2.0 

2.4

1.4 

2.2

(1.4)

.55

.,8

Chemical analyses (percent)

P2°5

0.5

.4 

1.1

18.9 

1.5

.6 

1.0 

7.1 

.7 

.3

.3 

.3

.4 

3.8 

16.0

33.2 

2.7 

9. 1 

33.7 

32.7

13.9 

34.3 

28.9 

32.8 

29.2

12.9

1.1 

32.7 

27.7 

22. 1

32.1 

1.7

.9 

1.8

17.5

A12°3

0.99 

3.9 

4.2 

.65 

1.3

5.8

2.0 

.92 

1.9

6.0

4.2 

1. 1 

2.3 

4.2

1.5

Fe2°3

0.99 

1.77 

2.30 

.54 

.75

2.97

1.00 

.57 

.93

2.31

1.94 

.81 

1.30 

2.00

1.50

Loss on 

ignition

4.72 

21.38 

14. 10 

5.30 

5.46

9.64

8. 10 

6.92 

7.30

6.00

24.40 

5.30 

4.84 

4.32

2.32

Acid 

insolu

36.4 

57.8 

72.9

40.8 

67.3

32.7 

62.0 

61.5 

71.8 

77.4

60.8 

65.6 

71.9 

4.0 

14.3

5.7 

41.8 

42.6 

3.5 

7.8

43.5 

4.7 

11.8 

5.8 

13.6

51.6

38.7 

6.3 

18.3 

32.2

11.0 

65.8

36.2 

81.5

12.5
P-140

P-139 

P-138 

P-137 

P-136

P-135 

P-134 

P-133 

P-132 

P-131

P-130 

P-129

P-128 

P-127

P-126 

P-125 

P-124 

P-123 

P-122

P-121 

P-120 

P-119 

P-118 

P-117

P-116 

P-115 

P-114 

P-113 

P-112

P-lll

P-110 

P-109 

P-108

P-107 

P-106 

P-105 

P-104 

P-103

P-102 

P-101

Carbonate rock, argillaceous, 

phosphatic _______ _.

Carbonate rock, argillaceous - 

Carbonate rock -- _________

Mudstone, phosphatic, carbonaticCarbonate rock - ---- -------.

Carbonate rock - --- - - 

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

Phosphate rock, argillaceous Mudstone-- - -- - 

Mudstone, carbonatic-- --

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

Mudstone- - - -

Carbonate rock, argillaceous, lens in

bed P-128 

Mudstone----- -- - - 

Mudstone---- _________ _ 

Mudstone, phosphatic - 

Mudstone---- ------ - .

Mudstone, phosphatic--------

Carbonate rock, argillaceousMudstone, phosphatic -_-_-.

Mudstone, phosphatic--- -- 

Mudstone, phosphatic---- - 

Mudstone, carbonatic-- - Mudstone- -- 

Phosphate rock, argillaceous 

Carbonate reck -- -__- ____ __ ___. 

Phosphate rock, argillaceous - 

Carbonate rock, argillaceous, phosphaticPhosphate rock, argillaceous, carbonatic* 

Carbonate rock - - .

Phosphate rock, argillaceous - - 

Carbonate rock, lens in bed P-110 

Phosphate rock, argillaceous 

Mudstone, carbonatic - 

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

Phosphate rock, argillaceous. 

Mudstone, phosphatic 

Phosphate rock, argillaceous. 

Phosphate rock, argillaceousMudstone, phosphatic - --- 

Mudstone, carbonatic 

Phosphate rock, argillaceous <

3639-RGW

3640 -RGW

3651 -RGW

3652-RGW

3653 -RGW

3654-RGW

3655-RGW

3624- RPS

3625- RPS

3626- RPS

3627- RPS

3628- RPS

3629- RPS

3630- RPS

3641- RPS

3642- RPS

3643- RPS

3644- RPS

3645- RPS

3646- RPS

3647- RPS

3648- RPS

3649- RPS

3656-RGW

3657-RGW

3658-RGW

3659-RGW

3660-RGW

3671-RGW

3672-RGW

3673-RGW

3674 -RGW

3675-RGW

3676-RGW

3677-RGW

3678-RGW

3679-RGW

3680-RGW

3 701 -RGW

3702-RGW

3703-RGW

3704-RGW

1.2

1.2

.8

3.0

1.7

1.5

.6

.4

.5

.6

1.2

.7

(.0-.6)

1.0

.8

1.0

1.3

2.5

1.0

.8

.5

1.3

1.6

.8

.5

1.1

.5

.7

1.4

1.0

.55

{.8)

.75

(1.15)

(.6)

(.95)

(.5)

(.6)

(1.8)

<1.65)

C.6)

(.8)

9.1

.9

5.6

11.3

1.5

.8

1.8

22.6

3.6

.4

1.3

5.6

.9

3.0

6.7

11.2

1.5

10.4

1.8

9.6

10. 7

13.2

1.4

3.4

18.2

1.9

18. 1

8.4

13.6

1.9

18. 1

1.2

20.4

1. 1

1. 1

19.7

10.9

17.4

20.3

12.4

4.4

16.7

22.3

37.0

1.7

34.2

12.7

5.8

12,7

28.0

66.4

65.6

75.3

64.1

29.3

70.7

64.9

46.2

81.8

75.8

40.5

54.4

46.5

38.8

51.0

68.3

30.2

15.0

29.0

18,5

22.3

1.5

27.0

1.7

26.8

46.8

14.7

28.0

46.0

30.3

22.2

39.8

55.0

34.0
C okeville C ontinued

Bed 

no.

P- 44 

P- 43 

P- 42 

P- 41 

P- 40

P- 39 

P- 38 

P- 37 

P- 36 

P- 35

P- 34 

P- 33 

P- 32 

P- 31 

P- 30

P- 29 

P- 28 

P- 27 

P- 26 

P- 25

P- 24 

P- 23 

P- 22

P- 21 

P- 20

P- 19 

P- 18 

P- 17 

P- 16 

P- 15

Rock description

Lower trench

An overlap probably exists between the 

two partial sections of the phosphatic 

shale. The most probable correlation 

is that bed P-110 in lower trench is 

equivalent to bed P-38 in upper trench, 

although considerable uncertainty 

exists.

Phosphate rock, argillaceous, and

jvludstone, caroonatic

Sample 

no.

3709- RPS 

3710- RPS 

3741- RPS 

3742- RPS 

3743- RPS

3744- RPS 

3745- RPS 

3690- RPS 

3735- RPS 

3736- RPS

3737-RGW 

3738-RGW 

3739-RGW 

3740-RGW 

3731 -WRR

3732-WRR 

3725- RPS 

3726- RPS 

3727- RPS 

3728- RPS

3729- RPS 

3730- RPS

3650- RPS 

3661- RPS 

3662- RPS

3663- RPS 

3664- RPS 

3665- RPS 

3666- RPS 

3667- RPS

Thickness 

(feet)

(1.6 

(1.3 

(.6 

(.7

(i.o)

'.8 

3.3 

.7

1.8 

.85 

.9 

2.8 

.7

.9 

2.9 

1.1 

.7 

1.0

1.3 

.5

1.0 

.8 

1.2

.6 

1.4 

2.1 

1.0 

1.0

Chemical analyses (percent)

P2°5

7.6 

15.0 

22.2 

22.9 

11.7

30.4 

31.2 

3.5 

12.2 

8.2

7.0 

1.9 

1.8 

.4 

4.2

10.3 

2.3 

.9 

3.3 

3.9

22.2 

25.4

19.8 

7.3 

1. 1

2.6 

15.6 

3.6 

2.7 

2. 1

A12°3 Fe2°3

Loss on 

ignition

Acid 

insolu

67.3 

9.3 

3.3 

11.4 

25.8

5.0 

5.8 

14.2 

40.5 

49.7

45.8 

48.0 

47.4 

44.7 

16.0

47.8 

36.1 

15. 

42.3 

38.0

29.7 

27.8

32.2 

42.3 

30.8

74.2 

41.9 

74.2 

55.3 

76.3
P- 14

P- 13 

P- 12

P- 11

P- 10 

P- 9 

P- 8 

P- 7 

P- 6

P- 5 

P- 4 

P- 3 

P- 2 

P- 1

Mudstone, phosphatic, and argillaceous

3668- RPS 

3669- RPS 

3670- RPS

3705-RGW

3706-RGW 

3681- FJA 

3682- FJA 

3683- FJA 

3684- FJA

3685- FJA 

3686- FJA 

3687- FJA 

3688- FJA 

3689- RPS

1.0 

1.7 

1.9 

(.4) 

1.8

1.3 

.6 

1.4 

1.2 

.6

.4 

.6 

1.8 

2.0 

1. 1

14.7 

2.6 

27.7

29.6

29.5 

29.8 

28.0 

6.8 

6.1

1.9 

16.2 

13.2 

1.8 

16.6

6.1 

4.5 

.88

1.7

1.7 

1.6 

2.2

1.95 

1.46 

2.2

.63

.68 

.50 

.58

7.52 

24.78 

8.70

7. 12

7.76 

7.80 

8.54

~T

47.7 

38.5 

14.3

11.7

12.2 

9.0 

13.0 

7.4 

9.0

7.4 

,.31.4 

32.8 

13.6 

15.0

Wells formation top bed only

Cw- 1

A fault separates beds Cw-1 and P-l. 

Missing stratigraphic interval is 

unknown.