GEOLOGICAL SURVEY CIRCULAR 209

STRATIGRAPHIC SECTIONS OF THE 

PHOSPHORIA FORMATION IN

MONTANA, 1947-48

By R. W. Swanson, W. R. Lowell, E. R. Cressman, and D. A. Bostwick
UNITEt) STATES DEPARTMENT OF THE INTERIOR 

Douglas McKay, Secretary

GEOLOGICAL SURVEY 

W. E. Wrather, Director

GEOLOGICAL SURVEY CIRCULAR 209

STRAHGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION

IN MONTANA, 1947-48

By R W. Swansea, W. R. Lowell, E. R. Cressman, and D. A. Boetwick

This report concerns work done partly OB behalf of the

U. 8. Bureau of Reclamation

and partly on behalf of the

U.S. Atomic Energy Commission

and is published with the permiasioa of the Commission

Washington, D. C.,1963

Free OB application to the Geological Survey, Washington 26, D. C.
CONTENTS

 Lot no. Page

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

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

Stratigraphy of the Phosphoria formation in Montana ........................................ 1

Stratigraphic sections.................................................................... 1

References ............................................................................. 3

Tables of Stratigraphic sections t..........................................................

Jack Canyon......................................................................... 1218 5

Spectrographic analyses.......................................................... ?

Aspen Valley........................................................................ 1215 8

Shell Canyon ........................................................................ 1214 9

West Fork of Gallatin River .......................................................... 1216 11

Porcupine Creek .................................................................... 1217 12

Daly1 s Spur ...................................................................... 1222-1223 13

Sheep Creek ........................................................................ 1234 16

Spectrographic analyses.......................................................... 20

Oil shale analyses ............................................................... 23

Hidden Pasture Creek, Muddy Creek, and Big Sheep Canyon........................... 1224-1227 25

Additional analyses of WRL-150-47 ................................................ 31

ILLUSTRATIONS

Plate 1. Phosphoria formation outcrops in Montana and localities sampled for phosphate ...... Faces 1

Figure 1. Generalized section of Phosphoria formation at Sheep Creek ....................... 1234 2
UNITED STATES DEPARTMENT OF THE INTERIOR 

GEOLOGICAL SURVEY CIRCULAR 209 PLATE 1

47°

46°

45°

44°

Outcrop of Phosphoric formation, 

dotted where questionable

o 1234

Location and lot number of sample 

locality included in this report

o 1252

Location and lot number of sample 

locality to be included in later reports

122^6 tT227

114°

Recompiled and modified 

from Clabaugh, 1946

PHOSPHORIA FORMATION OUTCROPS IN MONTANA AND LOCALITIES SAMPLED FOR PHOSPHATE

10 10 20 30 40 MILES
STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION

IN MONTANA, 1947-48

INTRODUCTION

The U. S. Geological Survey has recently measured and sampled the Phosphoria formation at many 

localities in Montana and other western states. These 

data will not be fully synthesized and analyzed for 

several years, but segments of the data, accompanied 

by little or no interpretation, will be published as preliminary reports as they are assembled. This report, 

which contains abstracts of many of the sections measured in southwestern Montana (pi. 1), is one of this 

series. The field and laboratory procedures adopted 

in these investigations are described rather fully in a 

companion report (McKelvey and others, 1953).

Many people have taken part in this investigation. 

The program of which this work is a part was organized 

by V. E. McKelvey. J. G. Evans, F. S. Honkala, R. L. 

Konizeski, J. A. Mann, R. L. Parker, O. A. Payne, 

E. T. Ruppel, J. E. Smedley, L. A. Thomas, andW. H. 

Wilson participated in the description of strata and 

collection of samples referred to in this report. The 

laboratory preparation of samples for chemical analysis 

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

Huleatt.

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. The spectrographic analyses were made by D. M. Mortimer, of 

the Bureau of Mines in Albany, and the oil-shale analyses were made by the Bureau of Mines Petroleum and 

Oil-Shale Experiment Station at Laramie, Wyo.

Compilation of the data has been largely by R. P. 

Sheldon and F. D. Frieske. Organization of the tabular 

data has been largely by Anita Cozzetto.

Acknowledgments

Special thanks are due A. E. Weissenborn, who 

gave much advice and help in carrying out the field program. The cost of the field and laboratory investigations 

has been borne partly by the Missouri River Basin 

Division of the Bureau of Reclamation and the Division 

of Raw Materials of the Atomic Energy Commission. 

Their support is gratefully acknowledged. It is a pleasure 

to acknowledge the fine cooperation extended to the field 

parties by the local residents and property owners who 

furnished information and services and gave access to 

property.

STRATIGRAPHY OF THE PHOSPHORIA FORMATION 

IN MONTANA

The Phosphoria formation in southwestern 

Montana consists in general of five members, twophosphatic shale members and three hard members (fig. 1). The

first description of these members (Klepper and others, 

1948) was presented in a paper read at the Northwest 

Science meetings in Spokane, Wash., but the first published description was by Klepper (1950). The lower 

two hard members are dominated by limestone and the 

top by chert and sandstone or quartzite. Most of the 

members can be identified over a large part of the area 

of outcrop, though member correlation toward the east 

and northeast is much more difficult. The formation 

ranges in thickness from less than 100 feet to more than 

800 feet.

The lowermost or A member is best developed 

toward the west and southwest and consists of limestone or dolomite, sandstone, mudstone, and chert, 

with a maximum thickness of nearly 350 feet. It overlies the Pennsylvanian Quadrant formation and is probably equivalent to the upper member of the Wells formation of southeastern Idaho and adjacent Wyoming and 

Utah (McKelvey, 1949).

The lower phosphatic shale or B member is about 

50 feet thick near the southwest corner of the state but 

thins markedly to the north and east where in some 

areas it cannot be recognized. It contains a rich bed 

of minable phosphate in the Centennial Range.

The middle or C member consists of as much as 

200 feet of limestone and/or chert and sandstone. The 

upper phosphatic shale or D member is rather similar 

to and much more uniform and widespread than the 

B member, though minable phosphate is present only 

toward the north .end of the" field where the full thickness 

of the phosphatic zone may consist of a single 3- to 5- 

foot bed of high-grade phosphate rock.

The uppermost or E member is the most widespread and uniform, averaging about 100 feet in thickness and consisting chifely of siliceous rocks siltstone, che.rt, and quartzitic sandstone. It is overlain 

by the Triassic Dinwoody formation in the greater part 

of the area and by the Jurassic Ellis group toward the 

north and northeast.

STRATIGRAPHIC SECTIONS

Analytical data and abstracts of stratigraphic 

sections measured at eight localities follow. Their locations as well as the locations of other sections to be 

reported later are shown in plate 1.

The semiquantitative spectrographic analyses are 

based upon comparisons with a standard plate representing known quantities of the elements tested for and 

made at the same exposure. Greater sensitivities for 

many elements can be obtained by additional exposures. 

The standard sensitivities for the elements noted in this 

report are as follows:
30 

FEET

PERCENT 

20 10'

THICKNESS 

IN FEET

AVERAGE

P2 VN

PERCENT DESCRIPTION

Dinwoody formation 

Muds tone: calcareous, soft, pale-yellow, thin-bedded

SO

100

Member E 

Sandstone: hard, pale, yellowish-orange, thick-bedded

Chert: hard, light-gray, thick-bedded chert interbedded with medium-hard, pale 

yellowish-orange, thick-bedded chert

Sandstone and chert: medium-hard, light-gray, thick-bedded sandstone containing 

some iaterbeds of hard, light-gray chert

31 Sandstone and chert: medium-hard, brownish-gray, thick-bedded sandstone 

interbedded with hard, light-gray, thick-bedded chert

14 Sandstone: medium-hard, yellowish-brown, thick-bedded sandstone interbedded 

with hard, brownish-gray sandstone

10 Chert: medium-hard, dusky yellowish-orange, to medium-brown, thick-bedded

Mudstone: medium-hard, light-gray to yellowish-brown, thick-bedded

Sandstone: hard, light-gray to yellowish-brown, thick-bedded; lowermost 0.75 

foot phosphatic

19 12

Member D 

Mudstone: phosphatic, soft, brownish-black, thin-bedded

15 Mndstone: soft, brownish-black to black, fissile

150

2OO

250

3OO

25 Phosphate rock: oolitic, soft, dark-brown, thin-bedded

22 14

Phosphate rock and mods too*: oolitic, medium-hard, brownish-gray, phosphate 

rock, interbedded with medium-hard, brownish-gray mudstone

12

Member C 

Sandstone: soft, dusky yellowish-orange, thick-bedded

41 Sandstone and chert: medium-hard, light brownish-grsy, massive sandstone 

interbedded with hard, yellowish-gray, massive chert

45 Dolomite: sandy, medium-hard, medium- to light-gray; contains lenses and 

nodules of chert

Sandstone: soft, dusky yellow, thin-bedded; contains many lenses and nodules 

of chert

35 Chert: hard, medium-grny to yellowish-brown, thick-bedded; contains some 

interbeds of mudstone and sandstone

Member B

Mud atone: medium-hard, medium yellowish-brown, thin-bedded; contains several 

small lenses of oolitic phosphate rode

14 Phosphate rock and mudstone: soft, brownish-gray, oolitic phosphate rock 

interbedded with soft, pale yellowish-brown mudstone

20 Mudstone: medium-hard, medium yellowish-brown, thin-bedded

Member A 

Mudstone: dolomitic, soft, light-gray, thin-bedded

349 10

Dolomite: medium-hard, pale yellowish-orange, thin-bedded; contains some 

interbedded cherty mudstone

Quadrant formation 

Sandstone: medium-hard, light-gray, thin-bedded

Figure 1. Generalized section of Phosphoria formation at Sheep Creek, Montana

2
Lenient

Sb . . . .

As ....

Ba . . . .

Be

Bi . . . .

B ....

Cd....

Ca. ...

Cr

Co. .. .

Cb....

Cu. . ..

fla

tte>

Au

In ....

Fe . . . .

Pb . . . .

Percent 

. . . . 0. 005

. . . . .05

.... .1

. . . . .08

. . . . .001

. . . . .002

. ... .001

.... . 1

. ... .01

. ... .02

.... .01

.... .01

. . . . .001

. ... .05

. ... .01

. ... .01

.05

. . . . .005

.... .1

Element 

Li .....

UTa

Mn .....

Hg .....

Tjlf\

Ni .....

P .....

Pt .....

Ci

(iff

Na .....

Ov.

Tfl

Sn .....

Ti .....

V .....

Zn .....

Zr .....

Percent 

... 0.2

.001

.004

.10

.004

.01

.8

.01

.002

.001

.05

.1

... 1.0

.01

.002

. 1

.01

.05

.003

REFERENCES

Clabaugh, P. S., Permian phosphate deposits of 

Montana, Idaho, Wyoming, and Utah: U. S. Geol. 

Survey, Strategic Minerals Investigations Preliminary Map 3-198.

Klepper, M. R., Lowell, W. R., Myers, W. B., 

Swansea, Roger W., and Kennedy, George C., 

1948, Distribution and stratigraphy of the Phosphoria formation in southwestern Montana, paper 

read at Northwest Science meeting, Spokane, 

Wash., in December 1948.

Klepper, M. R., 1950, A geologic reconnaissance 

of parts of Beaverhead and Madison Counties, 

Montana: U. S. Geol. Survey Bull. 969-C.

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

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

Eng. Mining Trans., vol. 184, pp. 270-279.

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

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

the Phosphoria formation in Idaho, 1947-48, 

part I: U. S. Geol. Survey Circular 208.
JACK CANYON, MONTANA. LOT NO. 1218. ,

Phosphoria formation sampled in hand trench and outcrop about 900 feet above Jack Creek on north side of canyon 

R. 1 E., Madison County, Montana, on overturned and faulted west limb of Madison Range syncline. Beds strike N. 60° 

measured by R. W. Swanson and sampled by J. G. Evans in September 1947. Samples analyzed by U. S. Bureau of Mines 

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses (percent)

P2°5 A1203 Fe203

Loss on 

ignition

Acid 

insoluble

Dinwoody formation

1*1

l-d-2

Mudstone, calcareous 

Sandstone, calcareous, argillaceous

6.0 

1.6

Phosphoria formation

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

 _

5

4

3

2

1

Chert and calcareous sandstone

Sandstone, calcareous, and chert

Sandstone, calcareous, and chert

Chert, sandstone, and limestone

Chert and quartz ite

Sandstone

Quartzite

Chert and quartzite

Chert and mudstone

Chert and mudstone

Chert and mudstone

Phosphate rock, argillaceous

Chert and mudstone

Phosphate rock, argillaceous

Chert and calcareous mudstone (may

include 2.45 feet repetition by

faulting)

Chert and mudstone

Chert and mudstone

Chert and mudstone

Phosphate rock

Limestone, argillaceous

Feldspar porphyry 

Feldspar porphyry

Sandstone, phosphatic, and phosphate

rock

Quartzite

Quartzite, cherty

Quartzite and chert

Conglomerate, mudstone, and chert

RWS-107-47

RWS- 106-4 7

RWS- 105-47

RWS- 104-47

RWS- 103 -4 7

RWS- 102 -47

RWS- 101 -47

RWS- 100-4 7

RWS- 99-47

RWS- 98-47

RWS- 97-47

RWS- 96-47

RWS- 95-47

RWS- 94-47

RWS- 93-47

RWS- 92-47

RWS- 91-47

RWS- 90-47

RWS- 89-47

RWS- 88-47

RWS- 87-47 

RWS- 86-47

RWS- 85-47

RWS- 84-47

RWS- 83-47

RWS- 82-47

RWS- 81-47

8.2

18.1

12.8

8.4

8.6

10.5

9.65

6.2

3.9

5.25

6.9

0.17

2.4

0.5

3.25

4.05

4,6

4.4

1.15

0.4

8:3

0.8

4.6

3.95.

2.5

0.6

0.8

1.5

1.5

0.8

1.8

1.4

2.1

1.3

0.6

1.3

0.9

18.9

1.2

22.9

0.8

0.6

0.8

0.6

28.8

0.8

0.2 

0.5

12.7

1.3

0.8

0.7

2.4

1.6

0.5

0.5

0.9

0.8

0.6

0.9

0.9

3.1

1.8

3.2

1.3

6.0

1.4

3.6

4.7

4.5

4.3

1.9

4.7

17.4 

16.9

1.9

0.5

0.7

1.0

2.8

2.6

1.3

1.9

2.6

2.1

1.1

1.3

3.5

5.1

4.3

5.5

2.9

5.2

2.6

4.1

4.7

4.9

4.1

1.4

2.3

3.2 

3.1

3.0

1.8

1.4

1.9

3.1

12.2

9.7

6.5

4.7

2.1

9.0

1.8

2.0

3.0

4.1

2.9

2.2

4.2

1.8

11.9

2.4

2.4

2.5

4.5

32.6

10.5 

11.1

1.7

2.4

1.9

0.8

7.3

68.4

74.0

81.3

85.0

88.2

75.3

89.3

88.5

85.0

83.1

84.5

44.0

81.3

37.4

67.8

87.3

86.9

87.5

19.0

24.9

74.6 

73.3

61.3

90.7

92.1

94.2

73.8
Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses (percent)

PZ°5 A1203 FeZ°3

Loss on 

ignition

Acid 

insoluble

Quadrant formation

Cq-1

Cq-Z 

Cq-3 

Cq-4 

Cq-5

Mudstone, calcareous, sandy, and 

argillaceous, calcareous sandstone 

Sandstone, quartzitic, cherty 

Chert, sandstone, and limestone 

Limestone, chert, and quartzite 

Limestone, cherty

RWS- 80-47 1.3 

Z.Z 

11.5 

11.0 

8.0

0.7 6.5 3. Z 9.6 70.4 
0

0

w

o

0

0

o

w

w

tt

w

Ul iffc U* N I-* O NO 00 -4 O* 

S3 S3 S3 S3 S3 S3 S3 S3 S3 S3 

COCO

I 1 

COCO CO CO CO i i i i i 

00 00 Oo 00 00 

-J O» Ul i^ U> 

rfk. rfk. *t *. ilk 

-4 -J -J -J -J 

CO COCO CO CO i i i i i 

NO >O NO 00 00 

M I O sO 00 

rfk, »(*. tlk, ill. rfh 

S3 S3 SJ S3 S3 S3 S3 S3 S3 S3 

CO CO CO CO 1 1 1 1 CO CO CO CO 

1 1 1 1 1 1 

OOOOO 

NONOOOO NONONONONO 

-4 O* Ul rfk (*> N I-" O NO 00 

I I I I I I I I I I 

*. rfk. ttk *. rf,. rfk. ttk *. *. &. 

«4 ^j «4 «j *! «J «J «J «J si 

OOOOO OOOOO OOOOO OOOOO OOOOO Od 

htj htj htj htj HJJ I'*!

ooa>a oooaa a>o>o »ooo oo>oo ao 

ooooo ooooo ooooo ooooo ooooo oo 

ooooo ooooo ooooo ooooo ooooo oo 

OOOOO dOdOO OOOdd OddOO OdOdd Od 

OOOOO OOOOO OOOOO OOOOO OOQOO OO 

o o w w w w w d

WWW W W 

MW

2! 2% 

O! OO 

MM

a a 

52

0

o

0

CO

t

IS

dO«>

*U w 

i" 3 

s » & a 

w O O a * 

27 a® 

a

o o 

a> 1 «- 

ao ^ 

 *. l-> I-"- 

o' tt 3 

01 P. K- _ 

a> o g-b 

w a rt- JS. 

§

3

P HR 

01 -1 5

o o 

& °» 

»,o f 

/-v O 

ffi 

o

1

CO

w

CO

^

o 

o

.i

I

H

>

w

 raw

(t IB 

o> c hj 

K & 

Ot3 «" 

O1 g p 

Q. 1 * 

P 0" ;g

O on W 

oil 

ft o 

O KP hH (D & B °-
ASPEN VALLEY, MONTANA, LOT NO. 1215.

Phosphatic shale member of Phosphoria formation sampled in hand trench near top of ridge on west side of A

T. 6 S., R. 1 E., Madison County, Montana, on overturned west limb of Madison Range syncline. Beds strike N. 45° 

measured by R. W. Swanson and sampled by J. A. Mann and J. G. Evans in August 1947. Samples analyzed by U. S. B

Albany, Oregon.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses

P2°5 F

percent)

Acid 

insoluble

Phosphoria formation top and base not exposed

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Sandstone

Quartzite

Chert and mud stone

Chert and mudstone

Chert and mudstone

Mudstone

Phosphate rock, cherty

Limestone, argillaceous

Chert and mudstone

Chert and mudstone

Chert and mudstone

Chert and mudstone

Phosphate rock

Phosphate rock

Mudstone

Limestone

Mudstone, calcareous

Phosphate rock and mudstone

Phosphate rock and phosphatic sandstone

Sandstone

__

RWS-43-47

RWS-42-47

RWS-41-47

RWS-40-47

RWS-39-47

RWS-38-47

RWS-37-47

RWS-36-47

RWS-35-47

RWS-34-47

RWS-33-47

RWS-32-47

RWS-31-47

RWS-30-47

RWS-29-4Y

RWS-28-47

RWS-27-47

RWS-26-47

RWS-25-47

2.1

0.75

4.2

2.5

4.45

0.55

0.25

1.0

4.55

4.45

4.5

2.25

1.6

0.3

0.45

0.83

0.7

0.6

0.55

0.8

__

1.3

0.9

0.6

0.7

1.3

23.5

0.5

0.5

0.7

0.7

0.5

31.0

26.9

1.4

0.7

3.7

14.6

21.3

1.6

__

--

--

--

__

2.05

--

--

--

__

3.0

2.97

--

__

--

1.52

--

-"

__

90. 1

81.8

84.0

78.0

75.4

31.4

37.6

50.6

82.1

82.4

84.9

11.8

18.0

72.3

15.4

56.7

37.0

38.9

92.9

* Cumulative data incomplete due to missing information.

** Note incompleteness of cumulative data.
SHELL CANYON. MONTANA. LOT NO. 1214.

Phosphoria formation measured and phosphatic shale member sampled in hand trench and outcrop on north sid

i sec. 33, T. 6 S., R. 1 E., Madison County, Montana, near crest of small dome at west side of Madison Range 

W. and dip 12° W. Section measured by R. W. Swans on and sampled by J. A. Mann and J. G. Evans in August 1947. S

Bureau of Mines Laboratory, Albany, Oregon.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses (percent)

P2o5 '

Acid 

insoluble

Dinwoody formation

Trd-1 Limestone .. 25.0 -- -- 

Phosphoria formation

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

Sandstone, calcareous, cherty

Sandstone, calcareous, cherty

Chert and sandstone

Quartzite

Limestone, cherty

Chert and quartzite

Quartzite and chert

Chert and quartzite

Quartzite

Quartzite and chert

Quartzite

Sandstone and chert

Chert, contains sandstone lenses

Sandstone, quartzitic

Sandstone, quartzitic, cherty

Chert and quartzitic sandstone

Chert and quartzite

Chert

Chert, contains thin mudstone partings

Chert, contains thin mudstone partings

Chert, contains thin mudstone partings

Chert, contains thin mudstone partings

Mudstone, calcareous

Phosphate rock, cherty

Mudstone, calcareous

Mudstone, calcareous

Mudstone, cherty, calcareous

__

--

--

_-

--

--

--

..

--

--

--

--

__

RWS-24-47

RWS-23-47

RWS-22-47

RWS-21-47

RWS-20-47

RWS-19-47

RWS-18-47

RWS-17-47

RWS-16-47

RWS- 15-47

RWS-14-47

0.75

6.0

3.4

2.8

1.45

4.3

7.4

5.8

2.9

11.3

5.2

3.3

3.0

5.3

1.7

4.6

0.7

3.2

4.15

5.0

5.2

5.1

1.2

0.55

1.15

3.7

0.75

__

__

--

__

__

..

..

--

__

-~

-_

__

1.6

0.6

0.8

0.5

0.6

0.9

1.1

19.2

0.8

0.9

0.6

__

--

-.

--

__

__

--

--

__

--

__

__

--

__

__

__

..

--

__

-_

--

__

--

 _

._

__

__

__

__

__

--

 

__

__

--

 »_

90.2

86.7

84.7

85.0

82.1

82.3

73.7

43.9

50.0

74.9

72.0

* Cumulative data incomplete due to missing information.
Bed 

no.

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Rock description

Mudstone

Phosphate rock, argillaceous

Phosphate rock

Phosphate rock

Mudstone

Limestone, argillaceous

Mudstone, calcareous

Mudstone, calcareous

Mudstone and phosphate rock

Sandstone, quartzitic, phosphatic and chert

Sandstone, quartzitic

Sandstone, quartzitic

Sandstone, quartzitic

Sandstone, quartzitic

Chert

Sandstone, quartzitic and chert

Sample 

no.

RWS-13-47

RWS- 12-47

RWS-11-47

RWS- 10 -4 7

RWS- 9-47

RWS- 8-47

RWS- 7-47

RWS- 6-47

RWS- 5-47

RWS- 4-47

RWS- 3-47

RWS- 2-47

RWS- 1-47

--

--

--

Thickness 

(feet)

2.05

0.75

0.5

1.5

0.5

1.2

0.8

0.45

0.65

1.0

1.9

0.85

0.7

5.55

3.75

2.5

Chemical analyses

P2°5

0.1

23.6

32.4

32.5

3.7

0.5

3.6

6.0

14.9

9.5

1.1

1.0

0.8

--

F

__

2.48

3.43

3.44

 -

--

0.79

1.58

..

--

--

--

percent)

Acid 

insoluble

80.5

30.2

8.1

8.4

70.6

20.0

55.2

47.3

40.4

70.5

90. 1

93.3

92.2

--

Quadrant formation

Cq-1 

Cq-2

Limestone, cherty 

Sandstone, quartzitic --

3.0 

10

--

--

** Note incompleteness of cumulative data.
WEST FORK OF GALLATIN RIVER, MONTANA. LOT NO. 1216.

Part of Phosphoria formation sampled in hand trench and outcrops on slope north of West Fork o

T. 6 S., R. 4 E., Gallatin County, Montana, from strata dragged up beneath Gardiner thrust fault. Beds 

SW. Section measured by R. W. Swanson and sampled by J. A. Mann and J. G. Evans in September 1947. 

Bureau of Mines Laboratory, Albany, Oregon.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Phosphoria formation lower part only

25

24

23

22

21

20

19

18

17

16

is

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Sandstone, quartzitic and chert

Quartz ite, contains chert concretions

Limestone, contains chert concretions

Chert and quartzite

Chert, quartzite , and mudstone

Quartzite

Chert and mudstone

Chert and mudstone

Chert and mudstone

Mudstone, phosphatic

Mudstone

Mudstone

Mudstone

Mudstone

Phosphate rock, argillaceous

Phosphate rock, argillaceous

Sandstone, phosphatic

Sandstone

Mudstone, contains quartzitic sandstone

concretions

Chert, calcareous mudstone, and quartzite

Quartzite, cherty

Mudstone, sandy, contains quartzitic

concretions

Mudstone, calcareous and quartzite

Sandstone, quartzitic

Quartzite

__

--

--

RWS-63-47

RWS-62-47

RWS-61-47

RWS-60-47

RWS-59-47

RWS-58-47

RWS-57-47

RWS-56-47

RWS-55-47

RWS-54-47

RWS- 53-47

RWS-52-47

RWS-51-47

RWS-50-47

RWS-49-47

RWS-48-47

RWS-47-47

RWS-46-47

RWS-45-47

RWS-44-47

--

10.5

2.0

0.7

5.5

8.85

0.65

5.75

3.4

4.45

0.3

1.35

1.8

0.85

2.5

0.45

0.7

1.5

1.6

1.3

1.35

2.2

1.15

1.05

1.2

4.3

__

--

--

0.8

2.0

0.7

0.6

0.7

14.9

0.9

0.8

0.8

1.1

22.2

26.2

8.3

0.6

1.1

1.5

1.4

2.2

0.9

0.8

--

__

--

90.1

89.2

84.8

90.7

91.0

56.3

81. 1

88.1

81.1

84.2

39.4

27.0

70.2

88.1

81.3

55.0

91.9

87.2

77.1

95.2

--

C^iadrant formation

Cq-1 

Cq*

Chert 

Chert and sandstone

... 1.8 

6.3 w«M

* Cumulative data incomplete due to missing information.

** Note incompleteness of cumulative data.
PORCUPINE CREEK, MONTANA. LOT NO. 1217.

Part of Phosphoria formation sampled in hand trench and outcrops on slope l| miles north of Porc

T. 7 S., R. 4 E., Gallatin County, Montana, from strata dragged up beneath Gar diner thrust fault. Beds 

SW. Section measured by R. W. Swans on and sampled by J. A. Mann and J. G. Evans in September 1947. 

Bureau of Mines Laboratory, Albany, Oregon.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses 

(percent)

P2°5

Acid 

insoluble

Phosphoria formation lower part only

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Sandstone

Chert, contains sandstone lenses

Sandstone

Sandstone, quartzitic

Chert, contains mudstone partings

Chert, contains mudstone partings

Chert, contains mudstone partings

Chert, contains mudstone partings

Chert, contains mudstone partings

Chert, contains mudstone partings

Chert, contains mudstone partings

Sandstone

Mudstone, calcareous

Limestone, argillaceous

Mudstone

Phosphate rock and mudstone

Limestone, contains sandstone concretions

Mudstone, contains sandstone concretions

Sandstone, quartzitic

Sandstone

__

--

--

RWS-79-47

RWS-78-47

RWS-77-47

RWS- 76-47

RWS- 75 -4 7

RWS- 74-4 7

RWS-73-47

RWS -72 -4 7

RWS- 71 -4 7

RWS- 70-47

RWS-69-47

RWS-68-47

RWS-67-47

RWS-66-47

RWS-65-47

RWS-64-47

--

6.0

2.6

4.8

0.6

4.6

3.9

3.6

1.55

1.0

0.95

1.65

0.6

0.8

0.7

2.9

1.0

1.25

0.6

0.67

9.5

__

--

--

1.6

0.8

0.4

0.9

3.3

0.8

0.6

1.1

6.9

1.4

0.4

1.6

22.9

0.8

1.8

2.6

--

- 

93.1

82.1

86.0

84.8

87.0

87.4

86.0

87.4

76.6

60.8

45.5

81.8

35.0

59.3

78.5

86.7

Quadrant formation

Cq-1

Cq-2

Cq-3

Sandstone

Sandstone and chert

Sandstone

-_

__

--

1.5

11.4

10.0

 _

--

__

--

--

* Cumulative data incomplete due to missing information.

** Note incompleteness of cumulative data.
Bed 

no.

D-35

D-34

D-33

D-32

D-3i

D-30

D-29

D-28

D-27

D-26

D-25

D-24

D-23

D-22

D-21

J>-20

D-19

D-18

D-17

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

Rock description

Mudstone, phosphatic

Mudstone

Phosphate rock, argillaceous

Mudstone, calcareous

Phosphate rock, argillaceous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstoase, calcareous

Mudstoxte, calcareous

Madstoae, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone

Mudstone, calcareous

Phosphate rock

Mudstone, calcareous

Phosphate rock

Mudstone, calcareous

Phosphate rock, argillaceous

Limestone

Mudstone, phosphatic

Phosphate rock and mudstone

Mudstone and phosphate rock

Phosphate rock, argillaceous

Mudstone, calcareous

Mudstone and phosphate rock

Mudstone

Phosphate rock, argillaceous

Phosphate rock, argillaceous, contains

gypsum

Mudstone, phosphatic, contains gypsum

Mudstone

Mudstone, phosphatic

Sample 

no.

WRL- 35-47

WRL- 34-47

WRL- 33-47

WRL- 32-47

WRL- 31-47

/WRL- 30-47

WRL- 29-47

WRL- 28-47

WRL- 27-47

WRL- 26-47

WRL- 25-47

WRL- 24-47

WRL- 23-47

WRL- 22-47

WRL- 21-47

WRL- 20-47

WRL- 19-47

WRL- 18-47

WRL- 17-47

WRL- 16-47

WRL- 15-47

WRL- 14-47

WRL- 13-47

WRL- 12-47

WRL- 11-47

WRL- 10-47

WRL- 9-47

WRL- 8-47

WRL- 7-47

WRL- 6-47

WRL- 5-47

WRL- 4-47

WRL- 3-47

WRL- 2-47

WRL- 1-47

Thickness 

(feet)

0.5

0.4

0.4

0.3

0.3

4.0

5.0

0.8

2.1

1.6

2.7

1.2

1.2

1.6

0.8

1.7

1.2

0.3

0.8

1.2

1.4

1.7

0.9

0.8

0.5

1.3

1.3

0.5

1.5

1.0

1.6

1.4

0,9

0.8

1.2

Chemical analyses

P2°5

10.1

4.8

22.4

2.9

19.0

4.2

2.9

2.7

0.6

1.6

2.0

1.6

0.6

1. 1

1.2

1.8

2.9

27.4

4.4

33. 1

6.8

22.6

3.9

10.0

22.8

11.0

24.4

0.2

14.7

5.3

17.2

20.3

8.8

3.3

13.8

F

__

0.41

--

--

__

--

--

--

-

..

--

--

--

--

3.8

--

4.1

__

--

--

--

--

__

2.48

--

1.28

0.68

__

--

--

1.33

percent)

Acid 

insoluble

53.8

71.5

23.5

55.8

33.0

42.6

49.9

61.3

65.9

67.9

63.3

65.5

63.6

35.0

69.4

71.5

50.2

19.3

60.6

6.7

52.3

24.62

18.6

49.1

21.3

48.3

24.7

68.3

48.2

71.2

35.9

27.5

62.1

75.8

45.9

C member of Phosphoria formation, lot no. 1223

C-ll 

C-10

Sandstone 

Sandstone and chert

WRL-276-47 

WRL-275-47

2.2 

2.7

15.1 

3.9

1.39 56.1 

77.2
DALY'SSPUR, MONTANA. LOT NOS. 1222 AND 1223.

Phosphoria formation sampled near Daly' s Spur, west side of Beaverhead River; A, B, C. and E members, 

trench and natural exposures, SWiSW$ sec. 36; and D member, lot no. 1222, in hand trench, NW^SWi sec. 36, T. 8 

County, Montana. Beds strike north to N. 30° E. and dip 30-40° W. Section measured by W. R. Lowell and sample

and E. T. Ruppel in July 1937. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon.

Bed

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses

P2°5 F

percent)

Acid 

insoluble

Dinwoody formation base not exposed

E member of Phosphoria formation, lot no. 1223 top not exposed

E-10

E- 9

E- 8

E- 7

E- 6

E- 5

E- 4

E- 3

E- 2

E- 1

--

Dinwoody- Phosphoria contact concealed by

basalt flow, estimated thickness of

covered E member

Quartzite

Chert

Quartzite, chert, and sandstone

Chert, sandy

Chert, sandy

Chert

Chert, sandy

Mudstone, contains gypsum

Chert

Quartzite, cherty, phosphatic

Chert

WRL-286-47

WRL-285-47

WRL-284-47

WRL-283-47

WRL-282-47

WRL-281-47

WRL-280-47

WRL-279-47

WRL-278-47

WRL-277-47

WRL- 46-47

20.0

23.7

12.5

9.8

20.4

22.3

7.4

14.7

0.5

3.6

1.2

--

--

2.2

1.5

2.2

1.5

1.6

2.5

1.7

2.2

2.6

16.6

5.9

--

--

--

--

--

--

--

--

__

--

WRL-46-47 is correlative with WRL -277-47 but occurs in same trench as D member.

--

89.4

91.0

89.5

90.1

89.6

87.3

89. 1

78.3

86.3

50.6

78.5

D member of Phosphoria formation, lot no. 1222

D-45

D-44

D-43

D-42

D-41

D-40

D-39

D-38

D-37

D-36

Mudstone

Mudstone

Mudstone

Phosphate rock, argillaceous

Mudstone, phosphatic

Phosphate rock, Argillaceous

Mudstone, phosphatic

Phosphate rock and phosphatic mudstone

Mudstone, calcareous

Phosphate rock, argillaceous

WRL- 45-47

WRL- 44-47

WRL- 43-47

WRL- 42-47

WRL- 41-47

WRL- 40-47

WRL- 39-47

WRL- 38-47

WRL- 37-47

WRL- 36-47

1.0

1.3

1.4

0.8

0.7

0.3

1.2

1.5

0.9

0.5

3.5

3.2

1.8

25.3

13.7

28.6

17.0

22. 1

6.1

22.2

__

--

--

2.44

1.17

__

1.60

--

--

--

80.0

78.5

66.7

30.1

51. 1

22.2

45. 1

32.8

45.5

32.0

* Cumulative data incomplete due to missing information.

** Note incompleteness of cumulative data.
C- 9

C-. 8

C- 7

C- 6

C- 5

C- 4

C- 3

C- 2

C- 1

Sandstone, calcareous

Sandstone

Chert and sandstone

Sandstone and cherty mudstone

Sandstone and chert

Sandstone

Sandstone, cherty

Sandstone and chert

Sandstone and chert

WRL-274-47

WRL-273-47

WRL-272-47

WRL-271-47

WRL-270-47

WRL-269-47

WRL-268-47

WRL-267-47

WRL-266-47

8.7

11.0

9.0

14.5

2.8

7.4

9.2

11.0

12.1

0.8

1.3

0.2

0.5

1.3

2.5

5.4

1.9

1.1

__

--

--

--

0.71

--

--

46.9

90.8

95.1

92.8

91.3

78.2

80.0

87.6

92.5

B member of Phosphoria formation, lot no. 1223

B- 5

B- 4

B- 3

B- 2

B- 1

Mudstone

Mudstone

Phosphate rock

Mudstone

Phosphate rock

WRL-265-47

WRL-264-47

WRL-263-47

WRL-262-47

WRL-261-47

3.1

0.8

0.4

0.3

0.7

6.7

6.0

35.7

4.5

36.4

0.68

3.56

__

3.57

67.0

69.6

6.4

76.5

5.2

A member of Phosphoria formation, lot no. 1223

A-10

A- 9

A- 8

A- 7

A- 6

A- 5

A- 4

A- 3

A- 2

A- 1

Sandstone

Sandstone and mudstone

Sandstone, cherty

Mudstone

Sandstone, calcareous

Limestone

Mudstone

Limestone

Mudstone

Limestone

WRL-260-47

WRL-259-47

WRL-258-47

WRL-257-47

WRL-256-47

WRL-255-47

WRL-254-47

WRL-253-47

WRL-252-47

WRL-251-47

2.4

3.3

1.4

4.2

3.0

2.8

0.7

3.5

1.5

6.7

4.4

0.5

0.8

0.6

0.1

0.2

0.5

0.0

0.4

0.3

--

--

__

--

__

--

--

--

84.4

82.0

90.5

80.0

76.6

18.9

79.3

2.6

80.6

1.9

Quadrant formation

_- Thickness of Quadrant formation 

exposed in cliff 400 --
SHEEP CREEK, MONTANA. LOT NO. 1234.

Phosphoria formation sampled in two bulldozer trenches near Sheep Creek Canyon, NWiSWi sec. 23, T. 9 S., R. 9 

Montana, on west side of Small Horn Canyon anticline. Beds strike N. 23-41" E. and dip 30-45* NW. Section measured by 

Cressman, O. A. Payne, V. E. McKelvey, D. A. Eostwick, F. S. Honkala, and J. E. Smedley and sampled by W. H. Wilson, 

Thomas, and Cressman in June 1948. Samples analyzed for P29jj an(* ac^ insoluble by U. S. Bureau of Mines Laboratory, 

other constituents by Trace Elements Section Laboratory, U.S. Geological Survey, Washington, D. C.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses (percent)

P2°5 A1203 Fe2°3

Loss on 

ignition

Acid 

insoluble

Dinwoody formation basal bed only

 M-l Mudstone, calcareous DAB- 80 -- 1.0 8.1 4.0 10.0 71.4 

E member of Phosphoria formation

E-ll

E-10

E- 9

E- 8

E- 7

E- 6

E- 5

E- 4

E- 3

E- 2

E- 1

Sandstone; fos. col. no. 48-KPM-43

Mudstone and chert

Chert and mudstone

Sandstone, chert, and mudstone; fos. col.

no. 48-KPM-42

Sandstone and chert

Sandstone and chert

Sandstone

Mudstone and chert

Mudstone

Sandstone and chert

Sandstone, phosphatic; fos. col. no.

48-KPM-41

DAB- 79

LAT- 7ft

LAT- 77

LAT- 76

ERG- 75

ERC- 74

ERG- 73

DAB- 72 ,

DAB- 71

DAB- 70

DAB- 69

v L9

10.2

13.7

13.5

14.0

17.1

13.6

10.5

10.8

4.1

0.75

1.7

1.6

2.1

1.7

2.4

2.6

2.7

3.3

1.6

3.0

17.2

2.5

5.1

4.4

2.3

2.1

2.9

1.0

2.2

4.8

1.0

2.2

4.6

3.0

3.4

3.5

3.9

2.8

4.0

3.2

2.3

3.2

1.5

1.5

2.3

1.8

1.5

1.0

1.3

1.0

1.2

2.8

0.8

2.8

87.9

87.3

88.9

88.6

86.9

88. 1

87.0

86.5

88.3

87.9

51.1

D member of Phosphoria formation

D-48

D-47

D-46

D-45

D-44

D-43

D-42

D-41

D-40

D-39

D-38

Mudstone, phosphatic

Mudstone; fos. col. no. 48-KPM-40

Mudstone, phosphatic; fos. col. no.

48-KPM-39

Mudstone; fos. col. no. 48-KPM-38

Mudstone

Mudstone

Mudstone, phosphatic

Mudstone, phosphatic

Phosphate rock, argillaceous

Mudstone and phosphate rock

VEM- 1

VEM- 2

VEM- 3

VEM- 4

JES - 5

JES - 6

JES - 7

JES - 8

GAP- 9

OAP-385

0.9

1.3

2.3

1.3

2.2

0.5

1.6

1.4

0.5

(0.3)

16.2

7.4

12.5

1.7

3.2

1.6

15.6

9.2

22. 1

23.8

7.4

9.2

8.7

11.2

9.9

8.8

6.7

9.0

4.7

4.1

3.6

2.4

2.3

1.9

4.3

2.0

2.8

3.3

2.3

1.8

8.0

9.7

10.0

9.3

13.4

11.8

11.1

14.2

7.5

6.9

OAP-385 represents the same bed as OAP-9 but was collected from a more weathered zone.

Mudstone

Phosphate rock, argillaceous

OAP- 10

GAP- .11

0.4

0.3

3.8

18.3

12.2

7.0

3.1

2.4

16.8

14.0

43.6

64.6

51.9

79.0

70.4

76.3

45.9

54.4

34.5

28.7

67.0

34.4
D-37

D-36

D-35

D-34

D-33

D-32

D-31

D-30

D-29

D-28

D-27

0-26

D-25

P-24

..

D-23

D-22

D-21

D-20

D-19

D-18

D-17

D-16

D-15

D-14

D-13

D-12

D-ll

D-10

D- 9

D- 8

D- 7

D- 6

Mudstone

Phosphate rock, argillaceous

Phosphate rock, argillaceous

Phosphate rock, argillaceous

GAP- 12

GAP- 13

LAT- 14

LAT-386

0.3

1.9

0.5

(0.5)

6.7

17.6

25.8

25.4

10.3

6.5

2.9

2.8

3.6

2.1

1.9

1.0

12.8

13.2

6.8

9.3

6

3

2

2

LAT-386 represents the same bed as LAT-14 but was sampled where the unit appeared to contain more arg

Phosphate rock, argillaceous

Mudstone and phosphate rock

Mudstone

Phosphate rock, argillaceous

Mudstone

Mudstone

Mudstone

Mudstone, calcareous; fos. col. no.

48-KPM-37

Mudstone

Mudstone, calcareous

Mudstone, calcareous

Mudstone

FSH- 15

FSH- 16

FSH- 17

FSH- 18

FSH- 19

ERG- 20

LAT- 21

LAT- 22

LAT- 23

LAT- 24

ERG- 25

ERC-387

0.8

0.85

0.8

0.8

2'. 7

1.0

2.2

1.5

0.9

2.8

0.9

(0.85)

20.2

20.2

6.4

26.0

5.2

1.4

3.5

2.4

1.6

1.4

4.5

2.7

4.8

5.8

9.6

3.9

10.2

10.7

10.0

9.2

9.8

10.9

11.1

M

1.6

2.1

2.5

1.5

3.2

2.9

3.4

3.7

4.1

3.7

4.7

3.5

9.0

10.5

14.1

8.9

18.4

20.8

16.4

30.1

30.5

21.1

20.9

22.1

3

3

6

2

6

7

6

5

5

6

6

6

ERC-387 represents the same bed as ERC-25 but was sampled where the unit appeared to contain more arg

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Phosphate rock, argillaceous; fos. col.

no. 48-KPM-36

Phosphate rock

Phosphate rock, argillaceous

Phosphate rock and mudstone

Phosphate rock and mudstone

Phosphate rock and mudstone; fos. col.

no. 48-KPM-35

Mudstone, phosphatic

Mudstone and phosphate rock

Phosphate rock and mudstone; fos. col.

no. 48-KPM-34

Phosphate rock

Phosphate rock and mudstone,* fos. col.

no. 48-KPM-33

Mudstone

Phosphate rock and mudstone

.Phosphate rock, argillaceous

Mudstone and phosphate rock

ERG- 26

ERG- 27

ERG- 28

LAT- 29

LAT- 30

LAT- 31

DAB- 32

DAB- 33

DAB- 34

ERG- 35

ERG- 36

ERG- 37

DAB- 38

DAB- 39

DAB- 40

DAB- 41

DAB- 42

DAB- 43

1.9

0.8

0.75

1.05

0.65

1.55

0.85

1.33

1.16

1.2

1.2

1.7

0.54

2.2

0.5

2.4

1.3

1.75

1.6

2.2

3.8

26.2

31.9

24.0

21.3

16.4

 14.6

14.0

14.7

18.8

32.3

15.5

6.5

12.3

15.9

21.7

10.6

9.0

10.0

5.6

3.9

5.6

6.8

6.7

7.9

8.8

8.3

6.0

2.6

7.3

10.2

9.5

10.5

6.3

4.1

2.8

1.9

2.9

1.9

1.5

1.7

3.7

2.6

2.5

2.2

2.0

1.0

2.9

3.6

2.6

2.7

2.5

30.6

26.2

30.0

14.3

8.1

16.8

20.0

19.6

19.0

22.5

19.8

25.5

7.1

17.0

8.0

14.2

17.6

10.5

5

6

5

2

1

2

2

3

3

3

3

2

1

4

7

5

3

3

Fossil collection made by K. P. McLaughlin, Paleontology and Stratigraphy Branch, U. S. Geological Su
Bed 

no.

D- 5

D- 4

D- 3

D- 2

D- 1

Rock description

Mudstone, phosphatic

Mudstone

Mudstone

Mudstone and phosphate rock

Phosphate rock and mudstone; fos. col.

no. 48-KPM-32

Sample 

no.

ERG- 44

ERG- 45

ERG- 46

DAB- 47

DAB- 48

Thickness 

(feet)

1.5

2.4

0.8

1.2

0.5

Chemical analyses (percent)

P2°5

10.4

6.0

6.6

15.0

27.0

A1203

9.7

11.1

11.9

8.0

2.0

Fe203

3.8

3.5

4.4

7.1

1.7

Loss on 

ignition

14.5

16.0

10.4

5.6

2.4

Acid 

insoluble

56.8

65.7

69.5

46.2

28.7

G member of Phosphoria formation

C-14

C-13

C-12

C-ll

C-10

C- 9

--

--

C- 8

C- 7

C- 6

C- 5

C 7 4

--

C- 3

C- 2

C- 1

Sandstone, argillaceous

Sandstone

Sample of mudstone nodules within

bed C-13

Sandstone, cherty/ fos. col. no.

48-KPM-31

Chert and sandstone

Chert and sandstone

Chert and sandstone

Mudstone

Mudstone, calcareous

Mudstone, calcareous

DAB- 49

ERG- 50

ERG-388

ERG- 51

' ERG- 52

LAT- 53

LAT- 54

LAT-391

LAT-390

LAT-389

2.9

2.3

--

7.2

5.5

15.0

20.5

--

--

--

3.4

3.6

5.1

3.2

2.7

0.6

0.9

1.8

2.0

5.2

3.7

3. 1

4.3

3.0

2.2

2.1

4.1

11.0

14.3

13.5

Lat-391, LAT-390, and LAT-389 represent three thin clay layers within bed C-9.

Limestone, argillaceous

Sandstone and limestone, cherty

Limestone, sandy

Limestone, sandy, cherty

Sandstone, cherty

Sandstone, cherty

LAT- 55

ERG- 56

ERG- 57

ERG- 58

DAB- 59

DAB-392

8.4

9.2

21.0

6.8

4.9

DAB-392 was a grab sample of less weathered rock in bed C-4.

Mudstone and chert; fos. col. no.

48-KPM-30

Chert and sandstone

Chert

DAB- 60

DAB- 61

LAT- 62

8.7

9.6

17.0

1.2

0.5

0.6

3.1

5.9

3.7

0.6

0.8

2.2

2.0

1.3

1.1

3.0

1.1

0.9

2.5

2.1

2.4

2.9

1.7

2.6

2.5

2.4

2.4

2.9

4.9

4.8

6.0

1.9

3.4

1.1

1.8

3.7

2.8

4.2

3.9

2.9

2.5

9.4

5.7

1.6

1.3

1.4

2.3

9.0

11.8

12.4

29.7

16.0

34.3

26.0

1.3

1.0

1.3

1.3

1.6

85.9

68.6

70.0

88. 1

89.2

94.1

91.3

71.4

66.9

58.2

32.2

58.8

23.3

35.6

78.3

90.3

90.7

91.8

89.1

B member of Phosphoria formation

B- 6

B- 5

B- 4

B- 3

B- 2

B- 1

Mudstone, sandy

Mudstone and phosphate rock

Mudstone

Mudstone, calcareous

Mudstone

Mudstone

RLP-393

RLP- 63

RLP-395

RLP-394

RLP- 64

LAT- 65

2.0

1.45

5.9

0.7

7.4

6.5

2.2

14.5

0.7

0.8

0.3

0.4

9.5

7.2

8.6

4.2

2.8

2.1

3.3

3.2

2.9

3.9

2.6

2.5

4.1

4.3

3.6

17.2

1.5

1.3

85.0

51.2

90.7

58.9

93.0

89.0
-- Mudstone, calcareous 

LAT-396 represents a 0. 2 foot layer conta

LAT-396 

ining quartz cr

(0.2) 

ystals in be

0.4 

dB-1.

16.3 3.5 14.6 61.2 

A member of Phosphoria formation

A- 2 

A- 1

Mudstone, calcareous 

Limestone, argillaceous; fos. col. nos. 

48-KPM-27 and 48-KPM-28

DAB- 66 

DAB- 67

6.7 

10.5

0.3 

0.3

4.6 

3.1

2.3 

2.3

17.9 

24.9

60.7 

47.5

Quadrant formation

Cq-I Sandstone DAB- 68 -- 0.1 2.5 2.0 1.8 98.5 

\
oz

UDDDD 

i t i i i 

o> w o» w o» 

NO OB O*-N| U» 1 1 1 1 1 O f IN) *.U» » OBOO

(xj *z| *x| 14 sj 0 > 0 *». H H H d d 

ggggg

ggggg

ooooo

ooootd

ggggg

ddddO

rnwrnH H H H H H H H H H 

>»»

««aaaH H H H H 

§ .,* ,

waood

OMMMWH H H H H H MH H H 

OOOOO dOdd , i i i i i i i i i 2 

*>UtCN-40B W M C- O 

^j^^^^ ^^hrtSStal 

|Sj ^5 p5 ^5 tiM tiM m tiM Q^ 9h> 1 1 1 1 1 1 1 1 1 ' 

f- M OJ I** Ul CTv -J OB sO Ul j ! ! j o woooo 

*!!!! **.*.... 

J j ! { d >.>td>>o ! ! ! ! d MHOdd * ' ' ' 9 w w 0 W W § i : J3 ^1 i9 £l f\ 

'II W w »? w W ; ! ; ; o QOOOO ! ! { j o aoooo 

gin: ggggg : i : : d ddddd j 1 J { H H H H *4 *4 J J j ! H HHHHH i i i i H HHHH H 

IIII H^ Hfc. Hfc. Hfc. Hfc. fv«. 

l i t , r f'f'f' r V> J 1 J ! ^ ^ ^ ^ o o ! ! ! i H HHHHH ' ' ' ' 2 ^ £2 £2 M gg ! j ! J H d H d d d ! J j ! d MHddd i ! ! i H HHHHH 

HI:;; HHHHH 

i i i i i i 

HH d d d d 

WOO W W W i i i i t i 

*. l» tS) H- O NO 

OOOOO 0 

OOOOO > 

HHHHH H d d d d d d 

Sdddd § 

ooooo o 

OOOOO 0 

ggggg g 

ddddd d 

HHHHH H 

>»» > 

ggggg g H *4 H H H H w d d 9 9 d 

HHHHH H 

HHHHH H 

HHHHH H 

 * 

HHHHH i i i i i 

I- O NO OB ~J 

Hrrrd,

OdOOO^ H H H *^ 

OOOOO

m«**t

gggggd d d d d 

ooooo

owwwo

ggggg

ddddd

HHHHH

*,**,

*x| *x| >x| *z| (xj 

>»»

ggggg

HH H *^ *^ 

g^^^g

HHHHH

HHHHH

HgggBH H *4 ^ ^ ifoO,>g§g0ogoHX>gHgHHHt

a ? 1g

fcWO

0 nO0

O o"Oo3M

ffOSB*g%S«

1?

"1

d 01 t- O g H- tn » 

5583|B (0 H o »- a * » 

H« ~ 

toM ^ & « H *4 O d 

II II N H 

& o o sr a o 2 o >-* o o * * V H- O W 

leri

O g (D 

1 OtJ O 0(0 * 1 *- a o 

 * » ^ 

^So

(D

s

rt-fl? 5? g 5 S-« 5 w S* ® 

list

(0 (i Ba> o B W 3 r+ 

w ,,."'"' 

hd QI en M M » «J On 5-1 ® 1 KJ >3B t&* > M » * & d | I "i! 

the ch 

S

e b,

P mi

tt

fD O (D 1 W 

_ O

 d

COIO

(DM

E - (D «- o <t) is ^ 5 "as- s

> pt (D CO 

ts; W W !3 

tii H" . . % § « 

(S " 3

^->

5-t) o 

(D 3 (D W O.V) 

iS»Sa I" W
wwwww wwwww wwwww wwwwfc wwwww fcwwww fcwwwfc ^ fefetafefe www

wwwww wwwww wwwww wwwww wwwww gwwww HHUUW w wwpww wwp

WQQQQ QQQQQ QQQQQ QQQQQ QwQQQ HHWQQ HQQQQ W HHPHW WWW

WWWPW QWQQQ PWPWW WWWWW WWWWW WWWWW WWPPW W WWWWW WHQ

Efii CM rj ITS ITj IT?; ffj CJ fej fie. &u P^ F*J f*1^ P^ F*J fifl fifl fifl PJ FJ fc|3 FJ F*J r*5 P*J F*J PJ fcj FJ PJ F^ F^ F^ FJ F*J FJ Cl Pj fcj* C5

*^ {Z5 !Z| SM jci (ZJ JZf S^i pSf SZ5 iZi iZf ^4 ^ Zj Z S5 Z Z ^ ^ pEj Z y!| Je* pES pES pi y!| ^ JE^ jc^ yj JZ« K

wwwww wwwww eawfeww WQQQW wwweaw wwwww wwfe^Ba u wfewi^fc www

fc fc fcfc fc fcOOOO OfcfcfcO OOOOO OOOOfe fcOOOh O OO OOO

WWfcWW fcWWWW fc fcPQWW WWQ

wwwww wwwww wwwww wwwww fcwwww eawwww

wwwww wfcfcfcw w eaauww

QQQQQ QUQQQ QQUQP PPPPO PPPPP ppppp PPPPP Q PUPWW WPU

O P O P

SSSS

uuuuu uuuww nuuuu uuuuu uuuuu uuuuu ouuuu o uuuuu PQWW

ooooo ooooo ooooo ooooo ooooo ooooo ooooo o ooooo ooo

ggggg ggg"" «gggg g»««g ggggg ggggg ggggg g ggggg gga

ggggg ggggg ggggg ggggg ggggg ggggg ggggg g ggggg ggfc

WOPPP PWPPP PWPWW WPWOW WWWWW WWWPR WWPPW W WWWWW

UPPPP WPPPP U«« <«« <J-<U-<<J <J-<UU-< < <OQUUU PPU

W fc fc fc EL, fa fc fc fe fe fcfafcfcfa fe fc fc fe fe fc fc fc fc fe

uuouu uuoun ouuou uuuou uuuuu uuuuu uuuuu u uuuuu uun

\o in \o !* oo o^ o ^ ^4 c^

00 i-i t >-< _i I-H IS IM <M (M f4 N 00 N N

^_^.^, ...r.r.r. ,..... .. ......... --_._... - ___ .._._... |JD U U U U

JWWWW WJJJP PPWWW PPRPP PWWHP g PWWWW

17777 7^777 ??'? !? ?7777 77^22 SS*"181- ^-«*«^ - 22,22 2^, 

1 OOQQ OCIOQQ PQ'OO QQOOQ QOPOQ QOQQQ QQQOQ p uu'uu uu !

21
22

Cd (0 W O 09 W o i i i i i i 

Ov ifr-U! W N 1- 

00 . 00 0 

i , , t . 

000 

, , , 

rr

aw

rrrrr

r

>

OOOO

»t>> 

BBWW

warrr

OOHHHI 

i i i i i 

00 ^ M O 1 tv» 

OOO»W OOOOO O OOOOB BW 00 O

M M ^ 

O i>a!>oo oooa> o oo O

O M M ^ M M M M M M M M i*| H MM M

O 

o

h"l J3 

ooooo ooooo o OOOOO OO QO Q

oooi>!> ooooo a w o w w w ts > OO O

e aoi>oo oooba M OOOOO Od OO O

O O M M M ^d M W O M OH MM M

hr|hr|

MMMMO M M M M M M MM 

52

O **! *! 1 OOO OO 

t

M M M ^ 'Tl **! M M M M M W O *! M W MB MM M

*3£| i^j 

ff gg

HHMOO MWMMM MO MM M

M M M M M WWHMW MM MM M

MMMMO M M M M M M M M M O M O MM M

N M MM
OIL SHALE ANALYSES SHEEP CREEK, MONTANA. LOT NO. 

Oil shale analyses of samples of the D member of the Phosphoria formation, Sheep Cr

preceding pages for location of section, thickness and description of strata, and chemical ana

U. S. Bureau of Mines Petroleum and Oil-Shale Experiment Station, Laramie, Wyoming, by t

method. None of the samples showed a tendency to coke.

Bed 

no.

D-48

D-47

D-46

D-45

D-44

D-43

D-42

D-41

D-40

~

D-39

D-38

D-37

D-36

D-35

__

D-34

D-33

D-32

D-31

D-30

D-29

D-28

D-27

D-26

D-25

D-24

--

D-23

D-22

Sample no.

VEM- 1

VEM- 2

VEM- 3

VEM- 4

JES- 5

JES- 6

JES- 7

JES- 8

OAP- 9

GAP-385

OAP- 10

OAP- 11

OAP- 12

OAP- 13

LAT- 14

LAT-386

FSH- 15

FSH- 16

FSH- 17

FSH- 18

FSH- 19

FSH- 20

ERC- 21

LAT- 22

LAT- 23

LAT- 24

ERC- 25

ERC -387

ERC- 26

ERC- 27

Yield of products

Weight (percent)

Oil

__

--

--

--

._

0.5

1.0

0.7

--

0.4

--

-_

2.9

._

8.2

7.8

5.3

1.9

2.6

9.7

3.2

Water

3.8

4.2

4.6

4.0

6.5-

4.8

5.4

5.8

3.5

3.2

6.4

5.0

6.2

5.2

3.1

3.4

3.8

4.5

5.5

3.4

7.5

5.6

7.0

5.2

6.0

4.4

7.7

6.5

4.3

7.2

Spent shale

95.1

94.0

93.2

94.4

91.3

93.3

92.9

91.6

95.7

95.7

90.1

91.7

91.9

92.5

96.1

94.8

94.1

93.9

92.1

95.1

89.'4

88.9

89.6

82.7

82.9

87.8

87.3

85.7

82.7

85.8

Gas -floss

1.1

1.8

2.2

1.6

2.2

1.9

1.7

2.1

0.8

1.1

2.5

2.6

1.9

2.3

0.8

1.4

2.1

1.6

2.4

1.5

3.1

2.6

3.4

3.9

3.3

2.5

3.1

5.2

3.3

3.8

Gallons per ton

Oil

~_

 i

1.3

...

2.6}

1.8*

__

__

0.9 1

--

__

..

__

7.0

20.0

18.8

12.8.

4.7

6.6 1

23.6

7.8

Water

9.1

10.1

11.0

9.6

15.6

11.5

12.9

13.9

8.4

7.7

15.3

12.0

14.9

12.5

7.4

8.1

9.1

10.8

13.2

8.1

18.0

13.4

16.8

12.5

14.4

10.5

18.6

15.6

10.3

17.3

Sp

Of oi

'

Estimated
wz i;""

017; l

en o * oo rq o r- M *< co 0*

oo in oo ^ -»

>£ 00 CO 00 00

CO " 0*00 t*> 00 * * «'_

o* oo oo oo oo 0000009-0*

O -» O O 00 

CO>O *O 00 t"*

M O *# 00 O ^ O ^ *< M -»O>OOOCJ >O

coooco-ct-* inoot^conl ?

.

is

« d

9- I I I O I 9-9-00 9> I I I I I t I I I I I

0-1110 i CT^O» o»a- i i i t i i i t i t i

i

O

^ oNt^o om^mo M o>-1^ * ^< NO

CO 00 O (M M N^tOCJN t-NCO^HO COOOONCOt- CO

oo i«*t^ ooeo'o'oo'co 'so-? 1 »

ro^^ooo a-r- -»

in* rH* ^H* ro* M pjfiroco'pJ ori

^< oo N co co o 

-^ PJ co" o o" o"

ooooor->o . r-o» so oo > ^

^t M ^i cr^ cr- ooooe-t-vo >OO>-N«*<'-I coo>eo^<-^o oo

00 O* O* 00 00 00 00 00 00 00 Q*> 00 0* O*> O^ 9^ 00 00 O*> 9s 9s

>o m N co o ooovorgo o-*r~oo«n m in o m rx) m 

in r- * in in m^mmtfv fomm^co inr>eo*inco -^

oo | |9-N cot-cot-m

p"* ^^ co co co ^* co in

Samp

00 O-O -^ N

N «M m m m

I I I I I till!

u E-< H EH m mnuuu

aoo>.o<*4(M ro^invor- 09 

co co *< *f *

JJJQ QQWWW

i iiit*

wyyypq m

QWWWP

i i i i i i i i i i i i i i t

QQDPD DDPOQ QQQOQ

till i 

Q

24
HIDDEN PASTURE CREEK, MUDDY CREEK. AND BIG SHEEP CANYON, MONTANA. LOT NOS. 1224. 12

Phosphoria formation sampled in hand trenches and natural exposures on east limb of Dixon Mountain syncline; D 

sampled in NE^SW$ sec. 26; B and C members, lot no. 1225, in SE$SW£ sec. 35: and upper part of A member, lot no. 122

R. 10 W.; lower part of A member, lot no. 1227, sampled in NW$NW$ sec. 11, T. 14 S., R. 10 W., Beaverhead County, M

and dip 30-40* SW. Section measured by W. R. Lowell and sampled by D. A. Bostwick, E. T. Ruppel, and R. L. Parker in 

by U. S. Bureau of Mines Laboratory, Albany, Oregon.

Bed 

no.

Rock description

Sample 

no.

Thickness 

(feet)

Chemical analyses (percent)

P2°5 A12°3 Fe203 V2°5 F

Loss on 

ignition

Aci

insolu

Dinwoody formation not measured

E member of Phosphoria formation, lot no. 1224

E-34

£-33

E-32

E-31

E-30

E-29

E-28

E-27

E-26

E-25

E-24

E-23

E-22

E-21

E-20

E-19

E-18

E-17

E-16

E-15

E-I4

E-13

E-12

E-ll

E-10

E- 9

E- 8

E- 7

E- 6

E- 5

Mudstone

Mudstone, cherty

Mudstone, cherty

Mudstone, cherty

Mudstone, cherty

Mudstone, cherty

Mudstone, calcareous

Mudstone, calcareous

Quartzite

Chert

Chert

Chert and mudstone

Chert

Chert

Chert

Limestone

Chert

Chert

Chert

Limestone

Chert

Chert .

Chert

Chert and limestone

Chert

Mudstone

Chert

Mudstone

Mudstone

Mudstone

__

WRL-222-47

WRL-221-47

WRL-220-47

WRL-219-47

WRL-218-47

WRL-217-47

WRL-216-47

WRL-215-47

WRL-214-47

WRL-213-47

WRL-212-47

WRL-211-47

WRL-210-47

WRL-209-47

WRL-208-47

WRL -2 07-4 7

WRL-206-47

WRL-205-47

WRL-204-47

WBL-203-47

WRL-202-47

WRL-201-47

WRL-200-47

WRL-199-47

WRL- 107-47

WRL-106-47

WRL- 105-47

WRL- 104 -47

WRL-103-47

25.0

3.5

4.0

5.0

4.2

4.2

0.8

1.3

4.6

5.0

5.0

4.7

5.0

1.7

4.4

0.8

4.9

4,5

1.9

1.0

2.2

5.0

2.2

2.5

2.7

5.0

5.0

5.0

5.0

5.0

«._

1.5

1.3

1.3

1.8

1.2

0.9

1.9

1.2

0.6

1.0

1.2

1.5

1.4

2.2

0.5

1.3

1.6

1.3

0.5

1.5

1.4

1.5

0.9

1.4

1.2

1.6

1.6

1.3

1.3

__

-.

--

--

__

--

--

--

__

--

_-

-_

-..

_-

 _

 m

 

 

__

__

 

..

 

 -

»-

..

 

 

_._

--

--

 

 _

--

 

 

 

_.»

 

 

 _

--

--

 

*...

__

__

_.

_-

 

 _

--

--

 

 

__

--

 

--

 

 _

 

-__

 

 

__

-.

_-

--

 

 _

--

-.

 

 

 _

--

__

-.

 

__

 .

 

M.

-~

__

 

--

 

__

 

--

 

__

 

__

--

 

 _

 

.-

 

 

--

__

__

 

--

_ 

 

 

 

 

-,-

 

 

__

 

 _

 

_-

 

 

 

--

--

--

 

__

 

 

 

-_

 

__

--

 

 _

78.9

71.7

74.6

74.6

75.5

66.6

75.3

76.

80.9

80.3

80.3

78.9

85.0

77.8

3.0

74.3

75.5

85.7

1.4

76.4

78.7

76.7

75.5

80.4

78.4

8.9

80.2

77.4

80.3
Bed

no.

E- 4 

E- 3 

E- 2 

E- 1

Rock description

Mudstone 

Mudstone 

Mudstone 

Mudstone

Sample 

no.

WRL-102-47 

WRL-101-47 

WRL-100-47 

WRL- 99-47

Thickness 

(feet)

5.0 

4.2 

5.0 

3.3

Chemical analyses (percent)

PZ°5

1.3 

1.4 

1.3 

3.5

A1203 Fe203 VZ°5

--

F

-

Loss on 

ignition

Acid 

insolub

79.4 

82.6 

81.1 

66.1

D member of Phosphoria formation, lot no. 1224

D-51

D-50

D-49

D-48

D-.47

D-46

D-45

D-44

D-43

D-42

D-41

D-40

D-39

D-38

D-37

D-36

D-35

D-34

D-33

D-32

D-31

D-30

D-29

D-28

D-27

D-26

D-25

Mudstone

Mudstone

Mudstone

Limestone, argillaceous

Limestone

Limestone, argillaceous

Limestone, argillaceous

Phosphate rock

Mudstone, calcareous and

phosphate rock

Phosphate rock, calcareous

Mudstone

Phosphate rock, calcareous,

argillaceous

Phosphate rock and argillaceous

limestone

Limestone, phosphatic,

argillaceous

Dolomite, argillaceous

Phosphate rock, argillaceous,

calcareous

Limestone, argillaceous

Phosphate rock, argillaceous

and limestone

Limestone, argillaceous

Mudstone, calcareous,

phosphatic

Limestone and phosphate rock

Mudstone, calcareous,

phosphatic

Limestone

Mudstone, calcareous,

phosphatic

Limestone

Mudstone, calcareous,

phosphatic

Limestone, argillaceous

WRL- 98-47

WRL- 97-47

WRL- 96-47

WRL- 95-47

WRL- 94-47

WRL- 93-47

WRL- 92-47

WRL- 91-47

WRL- 90-47

WRL- 89-47

WRL- 88-47

WRL- 87-47

WRL-' 86-47

WRL- 85-47

WRL- 84-47

WRL- 83-47

WRL- 82-47

WRL- 81-47

WRL- 80-47

WRL- 79-47

WBL- 78-47

WRL- 77-47

WRL- 76-47

WRL- 75-47

WRL- 74-47

WRL- 73-47

WRL- 72-47

5.0

5.0

5.0

1.3

4.1

5.0

1.2

2.5

0.7

1.5

3.0

2.3

1.1

0.6

0.7

1.7

0.5

2.9

2.9

1.3

1.8

1.2

1.6

0.6

0.7

1.4

1.2

5.8

5.6

7.8

6.8

1.8

5.7

6.8

26.8

8.8

22.5

6.9

16.7

21.7

12.9

5.4

13.8

5.1

14.9

4.9

8.5

5.3

9.1

6.6

10.0

3.8

9.2

4.0

__

__

--

--

__

--

__

--

--

--

__

-.

-.

--

--

--

__

--

-_

 

_ 

__

--

--

__

--

--

--

--

-_

--

__

--

-.

--

--

--

__

-_

-_

--

__

--

__

- 

__

 

__

--

__

--

--

__

--

--

0.47

--

--

-_

--

--

2.72

--

__

-.

--

--

0.47

1.55

--

0.75

--

--

--

--

 

__

--

__

-_

--

__

-.

-~

--

--

--

__

_-

--

50.3

50.5

46.3

40.8

19.2

36.7

38.1

12.3

49.4

41.7

56.9

23.7

13.5

32.3

34.1

33.2

39.9

33.7

26.3

41.9

15.2

46.0

18.3

42.6

15.2

46.1

22.6
D-24

D-23

D-22

D-21

D-20

D-19

D-18

D-17

D-16

D-15

D-14

D-13

D-12

D-ll

D-10

D- 9

D- 8

D- 7

D- 6

D- 5

D- 4

D- 3

D- 2

D- 1

Mudstone, calcareous

Phosphate rock, argillaceous,

calcareous

Mudstone, phosphatic, calcareous

Mudstone, calcareous

Mudstone, phosphatic, calcareous

Mudstone

Mudstone and phosphate rock

Phosphate rock, argillaceous,

calcareous

Mudstone

Mudstone, phosphatic

Mudstone, phosphatic

Phosphate rock

Mudstone, calcareous

Phosphate rock, argillaceous.

calcareous

Mudstone

Mudstone, calcareous, phosphatic

Phosphate rock, argillaceous,

calcareous

Phosphate rock, calcareous,

argillaceous

Limestone

Phosphate rock, argillaceous,

calcareous

Phosphate rock, argillaceous.

calcareous

Mudstone, phosphatic, calcareous

Limestone

Mudstone, calcareous, phosphatic

WRL- 71-47

WRL- 70-47

WRL- 69-47

WRL- 68-47

WRL- 67-47

WRL- 66-47

WRL- 65-47

WRL- 64-47

WRL- 63-47

WRL- 62-47

WRL- 61-47

WRL- 60-47

WRL- 59-47

WRL- 58-47

WRL- 57-47

WRL- 56-47

WRL- 55-47

WRL- 54-47

WRL- 53-47

WRL- 52-47

WRL- 51-47

WRL- 50-47

WRL- 49-47

WRL- 48-47

0.6

1.5

0.7

1.7

0.3

0.8

1.3

0.5

2.5

0.5

0.9

0.9

0.4

0.4

1.4

1.7

1.5

1.3

1.2

1.3

1.5

0.6

0.8

1.8

7.1

18.0

12.2

3.3

12.7

3.4

5.2

15.3

2.3

14.5

8.1

24.0

0.9

15.0

1.9

10.5

15.7

16.0

0.9

14.6

15.9

11.2

0.8

8.8

__

--

__

-_

--

--

--

__

--

--

..

--

--

--

--

--

._

--

--

..

--

--

--

--

_-

...

--

-. 

__

--

--

..

 .

__

--

 

--

--

--

_.

--

--

--

__

__

--

--

--

- 

__

1.29

--

--

2.74

1.70

--

--

--

--

__

--

--

--

- 

--

--

--

--

-_

50

26

41

64

40

69

61

36

72

41

53

18

59

36

75

44

30

34

17

32

29

43

19

42

C member of Phosphoria formation, lot no. 1224 top bed only

C- 1 Sandstone, phosphatic WRL- 47-47 

WRL-47-47, lot no. 1224, logged as equivalent t

(1.7) | 13.3 | -- 

o upper 1. 7 feet of WRL-1 C

' t ' 

>8-47, lot no. 1225.

55

C member of Phosphoria formation, lot no. 1225

C-36

C-35

C-34

C-33

Limestone, sandy

Sandstone, calcareous

Chert, calcareous

Chert, calcareous

WRL-198-47

WRL-197-47

WRL- 196-47

WRL-195-47

12.0

8.3

7.4

9.9

1.0

1.0

0.7

0.5

0.5

3.5

3.5

4.3

1.1

2.2

2.5

3.7

0.01

0.01

0.01

0.01

_.

--

26.5

8.4

9.8

8.0

32

73

73

75
x ong

M P0>

en (L +3

g^.2 fill

0 M S

as|

H 2x2- cu

«

> CO

? gC11®S-S-Si

u-" §2 

,3

33So

<J (0

c 1-1

§g

s°l

a> J^r 

g

*- & h

(0

0)

J5- *

2 O

o X0 "3 O

a N

A h

** co °.

5

m 

O

pa

04

(0

<n

0)- .

B * 

.5 8 35.a-"

H

3

to1°

Rock description

1gM fl

CO ON ON 0s P-I

o>o m IN- m

m oo co m rco co * * *

>o ao ao (M m

ao m o m ON ^i tnxoxoxo

pa co o ON pa

co pa ON pa co NO NO m in *

*-4 oo *-4 NO oo

pa co * r- pa i 1 1 1 1 1 1 i pa

i i i i i i i i i i

oo o o o

o o o o o

p-< so ^* m t~

m pa N «*> **

ro pa pa «*> ^

 1 <*> NO O ^<

in m ** m ^«

o o *i o o

O M O ^f (^

^ t- m-* * i i

t- t- t- t- t* ^ *^« * ^« i i i i i

^« M «M -> O

1 1 1 1 1

J J JJJ

9» §C P£ g£ g£

Chert andlimestone and Chertlimestone Mudstone, calcareous 

Limestone, cherty sandy Limestone, 

pa i o ON 00 ? ????

uouou

t- i-i er> cr> -* <*>vO rj rj a>

cr> -* >o ao <r* 4< m m m m

sO 00 NO >-l 00

pa m «*>xo ao

t^ t^ 00 00 00

t- o «*»o m

pa NO -H * o NO <*> in * ra

in ^ cr> pa o

 ^« t~ o» m m

*H pa ^ pa «*>

i 1 i i i i i i i i

o a»o o o

o o o o o

r- ^ so t- pa

^ m o vo oo

-i O O O O

vO t^ NO 00 NO

o o o o o

p-< pa ao m t~

«*> w» t- P4 pa

t- r- t- t- r» * * -*^« * 

i i i i i 

cr> oo (-NO m 00 OO 00 00 00

i i i i i

J J JJ J

Sandstone, calcareous 

sandy Limestone, 

and Sandstone limestone 

Limestone, sandy sandy Limestone, 

t»»o in<d«<n ?'?'?'? I1

ouUoo

>n ON fO <^l SO «*> -H m so to so oo cr>o

t- 1- t- t- 00

NO ON t^- -^t 00

^" ~t ONfO ^1

cr>o o - "i

NO O -< 00 *

oo t- M m tm co * NO *

-H ro *M m m

sOso pa «*> -< 

 -« pa pa -* pa

i i i i i i i i i i

o o o o o

o o o o o

^"

rO \O xO pa O

*M t- m <*» »«

O O O -« 0

00 00 Ct Ct 00

-i O O O O

00 M 00 t- * 

m r- t- «*> 1-1

t* t- t- t- t- t^« * * * i i i i Sm pa -H o 40 00 00 OO

1 1 1 1 1 

J J J J J

Sandstone, calcareous 

Limestone, sandyLimestone, cherty Chert, calcareous sandy Limestone, 

M -« O OOB

UUOOU

-* pa sOso pa ON m o^ o m

m pa <*> pa M 00 ON ON O O

«*>sO O *< tON * ^Q

 -I «*> M W> *

xO ^" «*> *M ^

o m -< rj ON 

 ^ m pa >o

^i m in t- tmoo ^-* o 

pa P-< m "< ^*

i i i i i i i i i i

o o o o o

o o o o o

NO ON N ON "<

i i i i i i O 

so pa ON ^i m

o o o o o

r- t-NO m pa

o o o o

m «*> ^« ^" m

^" pa pa m ^

Trtrr ON oo r- NO «n

i i i i i

J J JJJ

sandy Limestone, 

Sandstone and limestone 

Limestone, sandy

Sandstone, calcareous 

Limestone

t»Noin^t«

i i i i t

uuuuo

o o o o oo ~* <<i m -* en

 * t- o^o -*

-^ (M IM «*> «

ON ^1 NO NO 00

NO NO o (M in ^ in NO NO NO

 * fsa <*> oo -4

O t- ^" IMOO

r-l NO ON ON 00

m ^i «*> o pa

t- pa o *i pa «*> -^

i i i i i i i i i i

o o o o o

o o o o o

r-r-oNONtO -4 M M *

f> \O CO O CO

cr> ^" m co *

-H -i O O O

pa m pa o pa

NO o<>^* ra m

 *'*'*'* * 

 ««ro ra-HO

1 1 II 1

Limestone 

Sandstone, calcareous 

Chert, sandy 

Chert Chert

M -* O 0*00

1 t 1 t 1 

UOOOO

00 00 00 00 00

oo 90 ^ ^ oo

P4 ^" l«- ON-H

ro co co «*>^"

00 00 00 00 00

o m o m o

t»- I»- 00 00 O>

 * o> t- pa -*

ON m o> oo too oo r- r- rNO ^i t- ON pa

pa co mNO t«-

i i i i i i i i i i

o o o o o

o o o o o

ON^" O> 00 tpa * «« «« -*

 -4 NO ON i-4 t-

"""I*-*

co ^« m ^" m

o o o o o

o o o o o

m m in m in

r- r- t- r- t- *#*#*#'**# i > i i i

0"00 t-xO m 

xO vO vO xO xO

1 1 1 1 1

iiiii

tuttt

%£&£% 

ououo

r-xo m^< «

i i i t i 

DO DUO

00 00

oo ao

co in ,*.*

00 00

in o>

O> ON

 * rCO ON

xO 00

ON pa

co pa

i i

o o

0 0

o pa

«*m

00 O

^««n

o o

0 0

m ««

t- rTT <*«*»

xOxO

1 1

^J

ftuf fuf a

Chert, calcareous 

Chert

f«»-

i 1

uu

 */> m tN-

*-4 CO CO

 4< o> m

-H ISl CO

ON CO 00

t- r- pa

pa t- -t 

oo* ON in

-* r- oo

* * *

CO (M O

t«- r» tT

-*<* 

i i 

ra -4 o

NO NO NO 

I I 1 I 1 t

1 I I

fflfflffl

28
B-27

B-26

B-25

B-24

B-23

B-22

B-21

B-20

B-19

B-18

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

Limestone, argillaceous and

phosphate rock

Mudstone

Mudstone, phosphatic, calcareous

Chert and mudstone

Mudstone, cherty

Mudstone, cherty

Chert

Chert, calcareous and mudstone

Phosphate rock, calcareous.

argillaceous

Mudstone

Limestone, argillaceous

Mudstone, calcareous, phosphatic

Mudstone, calcareous

Mudstone, phosphatic

Mudstone, calcareous

Limestone, argillaceous

Phosphate rock, calcareous

Limestone, argillaceous

Limestone, argillaceous

Limestone, argillaceous

Limestone, phosphatic.

argillaceous

Mudstone, calcareous and

calcareous phosphate rock

Phosphate rock, calcareous

Phosphate rock, calcareous and

calcareous mudstone

Limestone, argillaceous

Phosphate rock

Phosphate rock

WKL-159-47

WKL-158-47

WRL-157-47

WRL- 156-47

WRL- 155-47

WRL- 154-47

WRL- 153-4 7

WRL- 152 -47

0.8

1.8

2.3

5.4

3.2

2.8

3.3

2.3

WRL-151-47, 1.0

WRL- 150-47

WRL-149-47

WRL- 148 -4 7

WRL-147-47

WRL- 146-47

WRL- 145-47

WRL-144-47

WRL-143-47

WRL- 142-4 7

WRL- 141 -47

WRL-140-47

WRL-139-47

WRL- 138-47

WRL-137-47

WRL-136-47

WRL-135-47

WRL- 134-47

WRL- 133-47

1.3

0.8

1.5

2.4

0.5

1.7

3.3

2.6

1.3

1.0

1.5

1.2

1.8

1.2

1.5

1.2

1.2

2.0

7.5

3.2

11.7

0.9

0.3

0.2

2.9

2.3

18.1

1.5

0.3

9.5

2.0

14.6

1.4

5.8

19.8

4.8

3.6

3.3

8.0

16.6

22.1

20.5

3.3

16.8

29.4

2.2

6.8

1.8

2.7

5.8

6.8

2.9

1.7

3.4

7.9

5.8

7.2

6.2

5.3

6.9

6.0

2.3

5.4

5.2

5.2

3.8

3.1

2.4

2.3

4.9

3.6

0.8

1.5

3.1

1.7

3.5

3.9

3.5

3.6

3.4

1.9

3.6

3.4

2.9

2.7

2.2

2.8

2.6

1.4

2.1

2.3

2.2

1.6

1.9

1.0

1.2

1.8

1.9

0.8

0.02

0.04

0.02

0.02

0.02

0.03

0.03

0.03

0.06

0.47

0.08

0.12

0.03

0.03

0.03

0.04

0.14

0.09

0.1

0.07

0.1

0.11

0.07

0.09

0.11

0.2

0.009

 ,-

--

--

-i*

~

- . 

 

-_

--

--

--

__

3.16

24.9

9.6

11.4

3.5

5.0

3.4

8.4

15.0

11.6

13.1

19.9

10.6

19.4

10.0

16.1

26.0

20.8

33.8

37.3

36.3

31.0

24.7

12.5

18.3

23.7

22.1

6.4

2

6

4

8

7

8

7

5

2

6

4

5

4

3

5

3

1

2

2

2

2

1

1

1

4

1

A member of Phosphoria formation, lot noa. 1226 and 1227

A- 53

A- 52

A-51

A- SO

A-49

A-48

A-47

A-46

Lot no. 1226

Limestone

Mudstone, calcareous

Limestone

Limestone

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

WRL-132-47

WRL- 13 1-47

WRL- 130-4 7

WRL- 129-47

WRL- 128-47

WRL -127-4 7

WRL-126-47

WRL-125-47

5.0

2.3

4.7

4.9

4.8

5.0

5.0

5.0

0.2

0.2

0.2

1.2

0.2

0.3

0.1

1.2

-»

_-

-.

_»

__

-_

._

__

«

_-

 -

~_

--

_«.

__

-.

--

.-

--

-.

6

1

6

6

6

7

See additional analyses at end of table.
Bed 

no.

A-45

A -44

A-43

A-4Z

A-41

A-40

A-39

A-38

A-37

A-36

A- 33

A -34

A-33

A-32

A-31

A- 30

A-29

A-28

A-27

A-26

4-25

V-24

1-23

A-22

A-21

A-20

A-19

A-18

A-17

A-16

A-15

A-U

A-13

A-U

A-ll

A-10

Rock description

Mudstone, calcareous

Mttdatone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Sandstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone, calcareous

Mudstone. calcareous

Mudstone, calcareous and

calcareous sandstone

Mudstone, calcareous

Sandstone, calcareous and

sandstone

Limestone, cherty

Limestone and sandstone

Phosphate rock

Limestone, cherty

Limestone and chert

Limestone

Lot no. 1227

Limestone, sandy

Limestone and sandstone,

calcareous

Limestone, sandy

Limestone

Chert and limestone

Limestone

Limestone, argillaceous

Limestone, argillaceous

Mudstone

Sandstone

Limestone, sandy, cherty

Sandstone, calcareous

Mudstone, calcareous

Sample 

no.

WRL- 124-47

WRL-123-47

WBL-122-47

WRL-121-47

WRL- 120-47

WRL-1 19-47

WBL-1 18-47

WRL- 117-47

WRL- 116 -4 7

WRL-1 15-47

WRL- 114-4 7

WRL- 113-47

WRL-1 12-47

WRL-1 11 -47

*

WRL- 110-47

WRL- 109 -47

WRL-1 08-47

WRL-2 50-47

WHL-249-47

WRL-248-47

WRL-247-47

WRL-246-47

WRL-245-47

WRL-244-47

WRL-243-47

WRL- 242 -4 7

WRL-241-47

WRL-240-47

WBL-239-47

WEL-238-47

WRL-237-47

WRL-236-47

WRL-235-47

WRL-234-47

WRL-233-47

WRL-232-47

Thickness 

(feet)

5.0

2.3

5.0

5.0

5.0

5.0

2.5

3.7

5.0

5.0

5.0

5.0

5.0

5.0

4.5

2.8

3.6

2.3

2.4

1.0

2.6

3.5

1.8

5.6

19.2

7.7

25.6

5,8

12.4

4.2

4.0

2.3

17.8

11.0

7.5

2.3

Chemical analyses (percent)

P2°5

0.1

0.1

1.3

1.3

U3

0.1

0.1

0.1

0.1

1.3

0.1

0.1

1.4

1.2

1.2

0.2

0.3

0.5

0.3

31.4

0.5

0.3

0.1

0.0

0.1

0.1

1.3

0.4

0.2

0.4

0.4

0.5

0,2

0.3

0.1

0.4

A1203

-_

--

_._

.-

--

..

--

..

--

--

--

...

--

--

--

__

--

--

.-

-m

 

__

--

 

 

 

__

..

 

Fe203

--

--

--

_-

«

--

..

--

__

..

--

._

--

«b»

 _

 

--

__

..

_-

..

 

__

 

--

 

 »* 

. ___

--

-~

V2°5

_.

..

--

--

--

--

.-

-.

--

--

._

--

__

..

--

--

.-

« 

_ 

--

--

F

.»

..

.-

--

--

«*M

._

-.

.-

» 

--

__

--

--

-.

._

...

--

.-

 '

 _

.«

]>

 »»

--

Loss on 

ignition

--.

-.

.-

--

._

..

«, 

-_

..

_«.

-_

_^

..

--

--

 «

.«

..

 .

-~

..

Ac

inso

72

71

70

72

71

70

77

73

68

65

65

65

65

58

69

65

70

48

48

12

34

29

9

48

68

28

19

55

11

25

40

76

89

32

76

71
A- 9

A- 8

A- 7

A- 6

A- 5

A- 4

A- 3

A- 2

A- 1

Limestone, argillaceous

Chert and limestone float.

bedrock not exposed

Chert, calcareous, sandy

Chert and limestone

Chert, calcareous, and limestone

Sandstone, calcareous

Limestone, cherty, sandy

Limestone

Lim0*tone

WRL-231-47

WRL-229-47

WRL-228-47

WRL-227-47

WRL-226-47

WRL-225-47

WRL-224-47

WKL-223-47

17.1

15.8

5.4

5.4

10.7

6.8

6.5

16.1

13.3

0.2

--

0.1

1.3

1.3

1.3

1.4

0.1

1.2

_..

.-

--

__

__

--

--

--

--

--

 _

--

--

-_

_-

- 

__

....

--

--

6

5

5

7

2

Quadrant formation not measured

* Cumulative data incomplete due to missing information.

** Note incompleteness of cumulative data.

Computations start from zero after interruption.

Additional analyses of sample WRL-150-47

Bed 

no.

B-18

Sample 

no.

WRL-150-47

P2°5

2.81

Ni

0.022

V2°5

0.56

Cr2°3

0.02

F

0.31

Co

0.004

sio2

60.60

Zn

0.003

Ti02

0.48

Cu

0.011

CaO

4.02

Pb

0.006

MgO

2.34

Ag

0.0001

\ Analyses made by the U. S. Geological Surrey, Geochemistry and Petrology Branch. 

CO, and 8 reported present.