GEOLOGICAL SURVEY , CIRCULAR 304 

STRATIGRAPHIC SECTIONS OF THE 

PHOSPHORIA FORMATION IN 

IDAHO, 1949, PART 1 

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 304 

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION 

IN IDAHO, 1949, PART 1 

By R. P. Sheldon, M.A. Warner, M. E. Thompson, and H. W. Peirce 

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 IDAHO, 1949,.PART 1 

By R. P. Sheldon, M. A. Warner, M. E. Thompson, and H. W; Peirce 

CONTENTS 

Lot no. Page Lot no. Page 

Introduction ........................ 1 Tables of stratigraphic 

Acknowledgments .................. 1 sections-Continued 

Stratigraphy of the Phosphoria South Stewart Canyon ........... 1306 9 

formation in southeastern Idaho .... 4 Pole Canyon .................. 1303 14 

Stratigraphic sections ...... , ........ ·4 Spectrographic analyses ... 17 

Selected bibliography ............... 4 Lone Pine Springs ............. 1298 20 

Tables of stratigraphic Georgetown Canyon .. . . . . . . . .. . 1320 24 

sections Dingle ..................... .. . 1293 25 

Timber Creek. ................ 1310 -5 Hot Springs ................... 1317 29 

ILLUSTRATIONS 

Page 

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

2. Generalized section of the Phosphoria formation at Trail Canyon, Idaho, lot no. 1206. . . . . . . . . . . . . 3 

INTRODUCTION 

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

localities in Idaho 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, are published as preliminary reports as they are assembled. This report, 

which contains abstracts-of many of the sections measured in southeastern Idaho (fig. 1), is one of this series 

and is the fourth report on Idaho; it includes about half 

the data gathered in Idaho in 1949. The field and 

laboratory procedures adopted in these investigations 

are described rather fully in a previous report 

(McKelvey and others, 1953a). 

Many people have taken part in this investigation, 

which was organized and supervised by V. E. McKelvey. 

F. J. Anderson, D. F. Davidson, R. S. Jones, 

R. A. Smart, R. G. Waring, and J. D. Weiser participated in the description of strata and the collection 

of samples referred to in this report. T. K. Rigby 

assisted in the preparation of trenches and the collection, crushing, and splitting of samples in the field. 

The laboratory -preparation of samples for chemical 

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

The P20 5 and ' acid-insoluble analyses were 

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

the Northwest Electrodevelopment Laboratory, 

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

1 

and M. L. Wright. The Al 20 3, Fe zO 3, and loss- onignition analyses were made in the Trace Elements 

Section laboratory of the Survey in Washingt'on, D. C., 

under the direction of J. C. Rabbitt, by chemists 

H. Alberty, I. Barlow, A. Caemmerer, F. J. Flanagan, 

F. S. Grimaldi, N. Guttag, C. Hoy, J. J. Rowe, and 

w.' P. Tucker, and the spectrographic analyses were 

made inthislaboratorybyK. Valentine andC. L. Waring. 

The data were compiled largely by K. S. Bergman 

under the supervision of R. W. Swanson. Organization 

of the tabular data was by Anita Wise. ' 

ACKNOWLEDGMENTS 

Special thanks are due W. W. Rubey, J. Steele 

Williams, and A. E. Weissenborn who have given much 

advice in planning and organizing the field program. 

The cost of both the field and laboratory inveStigations 

has been partly borne 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 operating phosphate companies, who 

furnished information and services and gave access to 

property. A. J. Winters, SuperintendentoftheMontpelier 

Schools; E. M. Norris, C. T. Russell, andL. E. Traeger 

of the Anaconda Copper Mining Co.; D. L. King of the 

San Francisco Chemical Co.; and G. A. McHugh and 

H. B. Fowler of the Simplot Fertilizer Co. have been 

especially helpful in this connection. 
INDEX MAP 

"~""-. ~ 1~ I 

o• 

~I 

(.!) 

z 

~ 

0 ·o• 

-· 1243\ } 1279~80 ~ 1269I. 4., '-.1263 

430---r-------:;.c-~------+------__:_1::_:34:.:9:..,.....:'•~------'=---------------_..443. 

.~ 

.~ 

051 

··· . •.. ·· 

EXPLANATION 

Outcrop ~"f"F)~~ia formation 

dotted where questionable ' 

OIJIO 

Location and lot number of sample 

locality mcluded in. this report 

0 1262 

Location and lot number of sample 

'locality to be included in other reports 

\ 

\ 

1304' ' 

l~ " \ 

10 0 . 40Miles s•~-c-~-~-DB~~~======~~~~====~ 

-1313 

'• 

~ 1266 

~1272 

Recompiled and modified from Clabaugh, 1946 

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

2 

• I 

I 

111° 
FEEt 

30 

.50 

10 

15 

200 

250 

300 

.350 

400 

1'rltCIENT P2 Os' 

20' 10 0 LITHOLOGY 

THICK- AVERA8E 

N'ZSS p2 O!IIN 

;N FEET PERCENT 

DESCRIPTION 

Phosphoria formation 

Rex chert member (top r>Ot exposed) 

46 Chert: hard, black, thin-bedded 

32 Mudstone: hard, black, thin-bedded 

68 Chert: hard, brittle, dark-gray to pinkish-gray, thick-bedded 

82 

Chert and limestone: 80 percent hard, black, thin-bedded chert; 20 percent hard, 

dark-gray, massive limestone · 

Phosphatic shale member 

medium-hard, light brownish-gray; contains 

on 

Lower 0.5 fo~t contains whit,. 

Wells formation 

Figure 2. -Generalized section of the Phosphoria formation at Trail Canyon, Idaho, lot no. 1206. 

3 
STRATIGRAPHY OF THE PHOSPHORIA FORMATION 

IN SOUTHEASTERN IDAHO 

At its type locality in southeastern Idaho 

(Richards and Mansfield, 19 i2), the Phosphoria formation consists of a lower member, the phosphatic shale, 

about 180 feet thick and an upper member, the Rex 

chert, about 240 feet thick; another member, a thinbedded cherty mudstone 15 to 75 feet thick, overlies the Rex 

chert member in most of southeastern Idaho and western 

Wyoming, although it is not well defined at the type locality. 

The Phosphoria formation overlies the Pennsylvanian Wells formation and underlies the Triassic 

Dinwoody formation. The upper 50 to 75 feet of the 

Wells formation cG:msists of a gray fossiliferous cherty 

limestone thatcontains some thin phosphatic layers. 

It may be the correlative of the lowermost member 

(A member) of the Phosphoria formation in Montana 

and the lower limestone member of the Park City formation in Utah (McKelvey, 1949). 

In southeastern Idaho most of the phosphatic beds 

are in the phosphatic shale member, and it is on this 

member that most of our studies have been focused. 

It consists of many thin layers, some of which persist 

over the whole area. They may be grouped into 

several broad units, as ·yet unnamed, as shown 

in figure 2. 

STRATIGRAPHIC SECTIONS 

Abstracts of stratigraphic sections measured at 

seven localities, and the available analytical data, are 

presented in the following pages. Their locations, as 

well as the locations of sections reported previously 

(McKelvey and others, 1953a and b, and O'Malley and 

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

shown in f:igure 1. 

The semiqw;mtitative 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 listed below: 

.Spectrographic sensitivities 

Percent Percent 

0.0001 Gd------------- 0.01 

.01 Ga------------- .01 

A1----------·--- Sb------------·-

As-------------

Ba-------------

Be----"'"--------

.1 Ge------------- .001 

.0001 Au------------- .01 

.1 

Bi------------- .01 

B-------------- Cd------------- Ca------------- Ce------------- Cs------------- Cr------------- Co------------- Cu-------------

.0001 Hf-------------

.001 Ho-------------

.001 In--~---------­

.01 Ir---------~--­

.001 Fe-------------

.001 

.1 

.001 

.1 La------------- .01 

*1.0 Pb------------- .01 

* .1 

.01 

.001 Li-------------

~01 Lu-------------

.0001 Mg-------------

.01 Mn------~------

.0001 

Dy-------..;. ____ _ .001 

Er------------- .01 Hg------------- .1 

Eu------------- 01 Mo------------- .001 

*.A greater sensitivity may be obtained by additional exposures. 

SELECTED BIBLIOGRAPHY 

Clabaugh, P. S., 1946, Permian phosphate deposits 

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

Survey, Strategic Minerals Inv. Prelim. Map 3-198. 

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., Armstrong, F. C., Gulbrandsen, R. A., 

and Campbell, R. M. , 1953b, Stratigraphic sections 

of the Phosphoria formation in Idaho, 1947-48, 

pt. 2: . U. S. Geol. Survey Circ. 301. 

4 

Percent Percent 

Nd------..,.·----- 0.01 Na------------- *0.1 

Ni---------.:, __ .01 Sr------------- .01 Nb------------ .01 Ta---------·---- .1 

Os------------ .1 Te------------- .1 

Pd------------ .01 Tb------------- .01 

P------------- .1 T1------------- .1 

Pt------------ .01 Th------------- .1 

K·------------- *l.O Tm------------- .01 

Pr------------ .01 Sn------------- .01 

Re---------~-- .1 Ti------------- .001 

Rh------------ .01 W--------------' .1 

Rb------------ *10.0 V-------------- .01 

Ru------------ .01 Yb------------- .0001 

Sm------------ .1 Y-------------- .001 

Sc------------ .001 Zn------------- .01 

Si------------ .0001 Zr------------- .001 

Ag------------ .0001 

McKelvey, V. E., Davidson, D. F., o·'Malley, F. W., 

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

the Phosphoria formation in Idaho, 1947-48, pt. 1: 

U. S. Geol. Survey Circ. 208. 

O'Malley, F. W., Davidson, D. F., Hoppin, R. A., 

and Sheldon, R. P. , 1953, Stratigraphic sections 

of the Phosphoria formation in Idaho, 1947-48, 

pt. 3: U. S. Geol. Survey Circ. 262. 

Ric.hards, R. W., and Mansfield, G. R., 1912, The 

Bannock overthrust: a major fault in southeastern 

Idaho and northeastern Utah: Jour. Geology, 

v. 20, p. 684. 
CJl 

Timber Creek, Idaho, lot 1310 

Phosphatic shale member of the Phosphoria formation sampled in bulldozer trench on east limb of Snowdrift anticline, st sec. 21, T. 8 S .• R. 45 E .• 

Caribou County, Idaho. Section measured by M. A. Warner, R. G. Waring, R. A. Smart, J. D. Weiser, and M. E. Thompson and sampled by 

Smart, Waring, H. W. Peirce, and _Wa:J;"ner in August 1949. Sampl_es analyzed for 5 and acid insoluble by U.S. Bureau of Mines laboratory, 

Albany, Oreg., and for other constltuents by Trace Elements Sectwn laboratory, U. S. Geological Survey, Washington, D. C . 

Bed Sample Thickness Chemical analyses _(percent) Cumulative Thickness x Rock description I I , I Loss on l ACld thickness percent P 20 5 no. no. (feet) P205 Al203 Fe203 ignition insoluble (feet) (cumulative) 

Rex chert member of Phosphoria formation-basal bed only . 

R- 111 C:hert----------------------------------1 4235-MAW I 2. 2 I 0. 5 I -- I -- I -- I 94.0 ! 2. 2 I --

Phosphatic shale member of Phosphoria formation 

P-115 Mudstone ------------------------------ 4234-MAW 1.5 1. 7 -- -- -- 91.0 1.5 2.55 P-114 Mudstone and phosphate rock------------- 4233-MAW 1.2 10.4 -- -- -- 60.6 2. 7 15.03 

P-113 Mudstone ------------------------------ 4232-MAW 2. 7 4. 7 -- -- -- 71. 5 5.4 27. 72 P-112 Mudstone ------------------------------ 4031-MAW 1.5 5. 1 -- -- -- 65.7 6.9 35.37 P-111 Mudstone --------------------------~--- 4030-MAW 1.8 1. 8 -- -- -- 78.6 8. 7 38.61 

P-110 Mudstone ------------------------------ 4029-MAW 2. 5 2.0 -- -- -- 79. 1 11. 2 43.61 P-109 Mudstone, carbonatic ---------------:---- 4228-MAW 2. 7 . 6 -- -- -- 68.8 13. 9 45.23 P-108 Niud stone ------------------------------ 4227-MAW 1.3 . 6 -- -- -- 82.9 15. 2 46.01 P-107 Mudstone ------------------------------ 4226-MAW 2.0 1. 6 -- -- -- 78.0 17. 2 49.21 P-106 Mudstone------------------------------ 4459- RGW . 9 1. 1 -- -- -- 80.5 18~ 1 50.20 

P-105 Mudstone ------------------------------ 4458- RGW . 6 3. 0 -- -- -- 65.6 18. 7 52.00 

P-104 Mudstone ------------·· ----------------- 4457- RGW 3.3 3.0 -- -- -- 73.6 22. 0 61.90 

P-10'3 Phosphate rock, argillaceous _________ _: __ 4456- RGW . 7 28.2 -- -- -- 20.2 22.7 81.64 

P-102 Mudstone ------------------------------ 4455- RGW 3.0 3.8 -- -- -- 71.9 25. 7 93.04 

P-101 Phosphate rock------------------------- 4454- RGW 1.7 35. 7 0.86 0.35 4.75 3.4 27.4 153. 73 

P-100 Phosphate rock-----~------------------- 4453- RGW 1. 3 36.0 .85 . 33 5.55 3. 2 28. 7 200.53 

P- 99 Phosphate rock and mudstone------------ 4452- RGW 1. 2 29.6 2.98 1. 05 4.50 17.5 29.9 236.05 

P- 98 Mudstone ------------------------------ 4451- RGW 1.0 6. 2 9.05 2. 78 5.65 71. 3 31. 5 245.97 

P- 97 Phosphate rock, argillaceous, and 

phosphatic mudstone------------------- 4450- RGW 1.0 21. 1 6.98 2. 10 4.80 36. 7 32.5 267.07 

P- 96 Phosphate rock------------------------- 5209- RGW 1.0 34.4 1. 34 . 60 2.75 8.2 33.5 301.47 

P- 95 Phosphate rock---------~--------------- 5208- RGW 1.9 32.5 1. 84 . 80 . 2.80 12. 7 35.4 363.22 

P- 94 Phosphate rock, argillaceous------------ 5207- RGW . 7 25. 1 3. 9.0 1. 13 3.70 28.5 36. 1 380. 79 

P- 93 Phosphate rock, argillaceous------------ 5206- RGW . 6 24. 1 4.06 1. 38 4.90 30.6 36. 7 395.25 

P- 92 Phosphate rock;argillaceous and mudstone 5205- RGW . 8 15.4 6.08 1. 98 6.93 46.9 37.5 407.57 

P- 91 Phosphate rock, argillaceous------------ 4445- RAS 1.1 L8. 6 5.68 2.00 5.50 43.0 38.6 428.03 

P- 90 Phosphate rock------------------------- 4444- RAS L: 1 30.8 2.46 . 75 3.45 14. 5 39. 7 461.91 

P- 89 Phosphate rock------------------------- 4443- RAS . 9 37. 1 1. 34 . 33 3. 15 3. 6 40.6 495.30 

P- 88 Phosphate rock------------------------- 4442- RAS 2.2 35. 5 1. 18 . 55 4.88 4.0 42.8 573.40 
Timber Creek-Continued 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

no. Rock description no. (feet) Pzo5 Al2o 3 Fe2o 3 

LOSS on ACld thickness percent P 2o 5 ignition insoluble (feet) (cumulative ) 

P-87 Phosphate rock, argillaceous------------- 4441- RAS 2.3 23.6 4. 15 1. 80 . 11. 50 18.4 45. 1 627. 68 

P-86 Phosphate rock-------------------------- 4440- RAS 1.9 29. 1 1. 94 1. 33 10.95 10. 3 47.0 682.97 

P-85 Phosphate rock. argillaceous------------- 4439- RAS 1.9 24.9 3.35 1. 78 15.00 17. 6 48.9 730 . 28 . 

P-84 Phosphate rock, argillaceous------------- 4438- RAS 1. 2 24.5 3.60 1. 23 15. 70 18. 7 50. 1 759.68 

P-83 Phosphate rock, argillaceous------------- 4437- RAS 2.3 23.7 4. 10 1. 35 13.50 22.3 52.4 814. 19 

P-82 Mudstone. phosphatic-------------------- 4436- RAS 1. 8 12. 5 -- -- ' 46.8 54.2 836. 69 

P-81 Mudstone. phosphatic-------------------- 4435- RAS 1.4 8.7 -- -- -- 61.6 55.6 848.8 7 

P-80 Carbonate rock ------------------------- 5756- JDW . 5 5. 3 -- -- -- 6. 5 56. 1 851. 52 

P-79 Mudstone ------------------------------- 5755- JDW . 9 2. 2 -- -- -- 76. 7 57.0 853. 50 

P-78 Mudstone, phosphatic-------------------- 5754- JDW . 8 15. 6 -- -- -- 39. 7 57. 8 865. 98 

P-77 Mudstone, phosphatic -------------------- 5753- JDW 4.3 14.4 -- -- -- 42.2 62. 1 927.90 

P-76 Phosphate rock, argillaceous. and 

mudstone ----------------------------- 5752- JDW 2.0 17. 8 -- -- -- 38.2 64. 1 963. 50 

-- Mudstone lens ---------------------- -~-- 5751- JDW (. 7) 6. 15 -- -- -- 67.8 -- -- P-75 Phosphate rock, argillaceous------------- 5750- JDW . 7 19. 7 -- -- -- 35.5 64.8 977. 29 

P-74 Mudstone, phosphatic-------------------- 5749- JDW . 7 8.0 -- -- -- 63.5 65.5 982.89 

P-73 Mudstone, phosphatic-------------------- 5748- JDW . 7 15. 3 -- -- -- 48.3 66.2 993.60 

P-72 Mudstone, phosphatic-------------------- 5747- JDW . 8 13. 2 -- -- -- 52.2 67. 0 1,004.16 

P-71 Phosphate rock, argillaceous------------- 5746- DFD 1.3 28.4 -- -- -- 20.5 68.3 1, 041. 08 

P-70 Mudstone , phosphatic-------------------- 5765-MET . 8 9.3 -- -- -- 67.3 69. 1 1, 048. 52 

P-69 Mudstone, phosphatic-------------------- 5764-MET 1.2 15. 3 -- -- -- 52.8 70.3 1, 066. 88 m 

P-68 Mudstone, phosphatic-------------------- 5 763-MET 2.4 13. 5 -- -- -- 55.0 72. 7 1,099.28 

P-67 Mudstone, phosphatic-------------------- 5762-MET 2.0 8.2 -- -- -- 69.0 74. 7 1,115.68 

P-66 Mudstone. phosphatic-------------------- 5761-MET 2. 1 8.5 -- -- -- 66.7 76.8 1. 133. 53 

P-65 Phosphate rock, argillaceous------------- 5760-MET 1.2 23.0 -- -- -- 29.5 78.0 1,161.13 

P-64 Phosphate rock, argillaceous and 

mudstone------------------------------ 5745-MET 2.4 9.2 -- -- -- 61. 6 80.4 1. 183. 21 

P-63 Mudstone ------------------------ -- ~ ---- 5744-MET 1. 1 3. 0 -- -- -- 77.0 81. 5 1, 186. 51 

P-62 Mudstone ------------------------------- 5743-MET .9 2.2 -- -- -- 80.9 82.4 1, 188.49 

P-61 Mudstone ------------------------------- 5742-MET 1.2 2. 8 -- -- -- 78.9 83.6 1,191.85 

P-60 Mudstone ------------------------------- 5741-MET 2.9 4.9 -- -- -- 69.7 86.5 1,206.06 

P-59 Mudstone ------------------------------- 5740-MET . 6 2.4 -- -- -- 80.0 87. 1 1,207.50 

P-58 Mudstone ------------------------------- 5739-MET 1.1 5.5 -- -- -- 72.3 88.2 1, 213 . 55 

P-57 Phosphate rock and mudstone------------- 5738-MET 1.7 8.7 -- -- -- 51. 2 89.9 1,228.34 

P-56 Mudstone. phosphatic-------------------- 5737-MET . 7 9.9 -- -- -- 59.5 90.6 1,235.27 

P-55 Mudstone -----------,-------------- ------ 5736-MET 1.0 7. 7 -- -- -- 59.2 91. 6 1, 242. 97 

P-54 Chert. phosphatic ----------------------- 5735-MET 2.4 11. 0 -- -- -- 62.9 94.0 1, 269. 37 

P-53 Mudstone ------------------------------- 5734-MET 2.0 . 7 -- -- -- 86. 7 96.0 1, 270. 77 

P-52 Mudstone ------------------------------- 5733-MET 1.5 2.3 -- -- -- 83.8 97.5 1,274.22 

P-51 Chert, phosphatic ----------------------- 5732-MET 2.4 8.9 -- -- -- 68.7 99.9 1,295.58 
P-50 Mudstone ------------------------------- 5731-MET 3.3 . 7 -- -- -- 86.2 103.2 1,297.89 

P-49 Mudstone ----------------------'"'-------- 5730-MET 1.2 1. 0 -- -- -- 86.6 1040 4 1,299.09 

P-48 Chert, phosphatic------------------------ 5729-MET 4.9 15. 5 -- -- -- 50. 1 109.3 1,375.04 

P-47 Mudstone, phosphatic-------------------- 5728-MET . 9 9. 7 -- -- -- 59.6 110. 2 1, 383. 77 

P-46 Mudstone ------------------------------- 5727-MET 2. 1 6. 1 -- -- -- 68.8 112. 3 1,396.58 

P-45 Mudstone ------------------------------- 5726-MET 2.4 6. 4 -- -- -- 65.6 114. 7 1' 411. 94 

P-44 Phosphate rock, argillaceous------------- 5779- JDW 1.7 23.2 -- -- -- 15. 2 116.4 1, 451.38 

P-43 Mudstone and phosphatic mudstone -------- 5778- JDW 1.9 10.4 -- -- -- 51. 5 118.3 1,471.14 

P-42 Mudstone, phosphatic-------------------- 5777- JDW 4.2 14. 1 -- -- -- 36.6 122.5 1,530.36 

P-41 Mudstone, phosphatic-------------------- 5776- JDW 1.9 8. 4 -- -- -- 60.7 124.4 1, 546. 32 

P-40 Carbonate rock, argillaceous------------- 5759- JDW 1.7 1.0 -- -- -- 29. 1 126. 1 1,548.02 

P-39 Carbonate rock, argillaceous------------- 5758- JDW 1.2 1.1 -- -- -- 43.6 127.3 1,549.34 

P-38 Mudstone ------------------------------- 5757- JDW 1.2 2. 5 -- -- -- 78.0 128.5 1,552.34 

P-37 Mudstone, carbonatic -------------------- 5773-MET 2.3 1.2 -- -- -- 54.3 130.8 1,555.10 

P-36 Mudstone ------------------------------- 5772-MET 1.3 2. 7 -- -- -- 64.3 132. 1 1, 558.61 

P-35 Mudstone ------------------------------- 5771-MET 1.5 2.0 -- -- -- 74.3 133.6 1, 561. 61 

P-34 Mudstone, cherty------------------------ 5770-MET . 9 2. 0 -- -- -- 85.3 134.5 1, 563. 41 

P-33 Mudstone ------------------------------- 5769-MET 2.0 3.5 -- -- -- 72.3 136.5 1, 570. 41 

P-32 Mudstone ------------------------------- 5768-MET 4.6 5.0 -- -- -- 66. 7 141. 1 1, 593.41 

P-31 Mudstone, phosphatic-------------------- 5767-MET 3.2 8.7 -- -- -- 57. 7 144.3 1,621.25 

P-30 Mudstone, carbonatic ----------------·---- 5766-MET . 7 5. 7 -- -- -- 52. 7 145.0 1, 625. 24 

P-29 Phosphate rock, argillaceous------------- 5725- JDW 3.5 18. 2 -- -- -- 31. 9 148.5 1,688.94 

P-28 Mudstone, phosphatic-------------------- 5724- JDW 1.3 10.4 -- -- -- 56. 1 149.8 1, 702. 46 

---::~ P-27 Mudstone, phosphatic-------------------- 5723- JDW 2.7 14. 8 -- -- -- 42.2 152.5 1, 742.42 

P-26 Mudstone, phosphatic-------------------- 5722- JDW 3.2 14.2 -- -- -- 40. 1 155. 7 1, 787.86 

Bed P-26 is highly crumpled and 

weathered. 

P-25 Mudstone, phosphatic-------------------- 5721- JDW 1. 5 15.4 -- -- -- 45.4 157.2 1, 810.96 

P-24 Phosphate rock, argillaceous------------- 5720- JDW 1.7 25.3 -- -- -- 17. 6 158.9 1,853.97 

P-23 Phosphate rock, a.rgiB.aceous ------------- 5719- JDW 1. 2 25.4 -- -- -- 22.5 160. 1 1,884.45 

P-22 Mudstone, phosphatic-------------------- 5718- JDW 3.0 15. 8 -- -- -- 47.5 163. 1 1, 931. 85 

P-21 Mudstone, phosphatic------------~------- 5717- JDW 3.4 12. 7 -- -- -- 51. 3 166.5 1, 975. 03 

P-20 Mudstone, phosphatic-------------------- 571/?- JDW 1. 5 8.8 -- -- -- 61.5 168.0 1,988.23 

P-19 Phosphate rock, argillaceous------------- 5715- JDW 3.0 25.4 -- -- -- 19. 3 171. 0 2,064.43 

P-18 Phosphate rock, argillaceous------------- 5714- JDW 2. 1 21.0 -- -- -- 31.9 173. 1 2, 108. 53 

P-17 Mudstone, phosphatic-------------------- 5713- JDW 1.3 8.4 -- -- -- 64. 7 174.4 2,119.45 

P-16 Phosphate rock ------------------------- 5712- JDW 5.0 31. 5 1. 53 . 70 7~30 8.9 179.4 2,276.95 

P-15 Phosphate rock ------------------------- 5711- JDW 1.4 29.4 2.04 • 85 7. 15 14.9 180.8 2, 318.11 

P-14 Mudstone, phosphatic-----·--------------- 5710- JDW 1.0 16.3 6.20 2.05 9.35 40.5 181. 8 2, 334. 41 

P-13 Phosphate rock ------------------------- 5709- JDW . 9 30.4 2.30 .95 7.00 11.5 182. 7 2, 361. 77 

P-12 Phosphate rock, . argillaceous------------- 5708-MAW . 7 15. 9 7.32 1. 95 9.20 38. 7 183.4 2,372.90 

P-11 Phosphate rock, argillaceous------------- 5707-MAW 2.4 27.4 3.30 1. 18 6.75 16. 2 185.8 2,438.66 
Timber Creek-Continued 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description (feet) P205 Al20 3 Fe2o3 

Loss on Acid thickness percent P 20 no. no. ignition insoluble (feet) (cumulativef 

P-10 Phosphate rock, argillaceous------------- 5706-MAW 1.2 25.0 2.76 1. 48 5.67 24.8 187.0 2,468.66 

P- 9 Phosphate rock, argillaceous------------- 5705-MAW 2. 1 22.5 4.65 2,00 7.50 24.3 189. 1 2,515.91 

P- 8 Phosphate rock-------------------------- 5704-MAW 1.9 32. 1 1. 47 2.88 6.40 3.5 191. 0 2,576.90 

P- 7 Phosphate rock-------------------------- 5239-MAW 2.9 33. 1 . 70 . 53 7.55 2.3 193.9 2,672.89 

P- 6 Phosphate rock-------------------------- 5703-MAW 1.2 31. 6 1. 17 . 68 6 . 20 6.0 195. 1 2, 710. 81 

P- 5 Mudstone ------------------------------- 5702-MAW 1.2 . 3 -- -- -- 75.3 196. 3 2, 711. 17 

P- 4 Mudstone------------------------------- 5701-MAW 2.4 . 4 -- -- -- 71.9 198. 7 2,712.13 

P- 3 Mudstone------------------------------- 4238-MAW 1.2 . 7 -- -- -- 70.3 199.9 2, 712.97 

P- 2 Mudstone ------------------------------- 4237-MAW . 7 7.6 -- -- -- 57.0 200.6 2, 718. 29 

P- 1 Phosphate rock, argillaceous------------- 4236-MAW . 5 26.4 -- -- -- 15. 5 201. 1 2, 731.49 

()) 
<:0 

South Stewart Canyon, Idaho, lot 1306 

Phosphatic shale member of Phosphoria formation sampled in two hand trenches on overturned east limb of the Dry Valley anticline in South Stewart 

Canyon, SE-i:SE-i: sec. 31, T. 8 S. , R. 45 E., Caribou County, Idaho. Because of limitations of hand trenches and complicated local structure, 

Bed 

no. 

the total thickness of the phosphatic shale member is probably in error. Section measured by R. P. Sheldon, R. G. Waring, M. A. Warner, 

D. F. Davidson, M. E. Thompson, J.D. Weiser, and H. W. Peirce and sampled by Waring, Warner, Peirce, and R. A. Smart in August 1949. 

Samples analyzed for P2 05. and acid insoluble by U. S. Bureau of Mines laboratory, Albany, Oreg., and for other constituents b y Trace Elements 

Section laboratory, U. s. Geological Survey, Washington, D. Co 

Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description I I I Loss on I Acid thickness percent P 20 no. (feet) P205 Al203 Fe203 ignition insoluble (feet) (cumulativef --

Rex chert member of Phosphoria formation- basal beds only 

R- 31 Chert -------------------------------- R- 2 Mudstone-----------------------------

R- 1 Chert --------------------------------

4193-MET 

4192-MET 

4191-MET 

0.9 

• 8 

0.4 

1. 4 

1.6 

92.4 

88.3 

87.8 

0.9 

1.7 

Phosphatic shale member of Phosphoria formation 

P-164 Mudstone -------------------------- ~-- 4190-MET 1.8 2. 8 -- -- -- 81.6 1.8 5.04 

P-163 Phosphate rock, argillaceous ----------- 4189-MET . 8 17. 8 -- -- -- 37.6 2. 6 19.28 

P-162 Mudstone ---------------:_ __ ----------- 4188-MET 1.2 2.2 -- -- -- 72.2 3. 8 21.92 

P-161 Mu~stone ----------------------------- 4187-MET 2.2 3. 6 -- -- -- 66.3 6.0 29.84 

-- Limestone concretion in bed P-160 ------ -- (. 4) -- -- -- -- -- -- --

P-160 Mudstone ------------ __ .;. _________ ----- 4186-MET 2.9 1.2 -- -- -- 77. 5 8.9 33.32 

P-159 Mudstone ----------------------------- 4185-MET 3. 7 . 5 -- -- -- 68.8 12. 6 35.17 

P-158 Mudstone ----------------------------- 4184-MET 1.7 2. 6 -- -- -- . 72.3 14. 3 39.59 

-- Limestone concretion in bed P-157 ------ -- (. 3) -- -- -- -- -- -- -- P-157 Mudstone ---.-------------------------- 4183-MET 2.5 2.8 -- -- -- 71.8 16. 8 46.59 

P-156 Mudstone, cherty---------------------- 4182-MET 1. 9 4.6 -- -- -- 68.3 18. 7 55.33 

P-155 Mudstone, phosphatic------------------ 4181-MET 1.5 13. 7 -- -- -- 56.5 20.2 75.88 

P-154 Chert -------------------------------- 4180-MET . 6 2.2 -- -- -- 90. 7 20.8 77.20 

P-153 Phosphate rock, argillaceous----------- 4179-MET • 7 19. 9 -- -- -- 40.2 21. 5 91. 13 

P-152 Mudstone ----------------------------- 4178-MET 1.2 1.9 -- -- -- 75.7 22. 7 93.41 

P-151 Mudstone, carbonatic ------------------ 4177-MET 1.1 . 3 -- -- -- 47.1 23.8 93.74 

P-150 Mudstone----------------------------- 4176-MET 1.5 2. 5 -- -- -- 64.6 25.3 97.49 

P-149 Phosphate rock ----------------------- 4175-MET . 7 36.4 0.93 0.52 3.99 3. 2 26. 0 122. 9 7 

P-148 Phosphate rock ----------------------- 4174-MET - 1.3 33. 8 1.7 . 79 5. 19 6. 9 27.3 166.91 

P-147 Phosphate rock ----------------------- 4173-MET 1. 0 36.9 . 76 .47 2. 55 4.0 28.3 203.81 . P-146 Mudstone and argillaceous phosphate 

rock-------------------------------- 4172-MET 1.1 6. 3 -- -- -- 67.9 29.4 210.74 

P-145 Mudstone----------------------------- 4171-MET 1.1 3. 2 -- -- -- 71. 8 30.5 214.26 

P-144 Phosphate rock, argillaceous, and 

phosphatic mudstone ----------------- 4138- JDW . 8 18. 6 -- -- -- 41.6 31.3 229.14 
I-' 

0 

Bed 

no. 

P-143 

P-142 

P-141 

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-111 

P-110 

P-109 

Rock description 

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

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

Phosphate rock ------------------------ Mudstone, phosphatic-------------------

Phosphate rock ------------------------ Mudstone, phosphatic-------------------

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

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

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

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

Mudstone, phosphatic and mudstone------

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

Mudstone-----------~------------------

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

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

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

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

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

Mudstone-~----------------------------

Mudstone------- --------------------:--

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

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

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

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

Mudstone, .Phosphatic-------------------

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

Muds.tone ~--------- -~- -----------------

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

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

Mudstone, carbona tic-------------------

Mudstone, phosphatic and phosphate 

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

South Stewart Canyon-Continued 

Sample Thickness Chemical analyses (percent) 

no. (feet) P205 Al20 3 Fe2o3 

Loss on Acid 

ignition insoll!ble 

4137- JDW 0.8 34.4 1.3 0.72 2.88 8.6 

4136- JDW . 5 27. 8 3.0 1. 15 4.22 22. 1 

4135- JDW . 5 1 o. 9 7. 9 3.97 5.40 56.9 

4134- JDW .65 35 . 6 1. 0 . 62 3 . 97 4.0 

4133- JDW • 6 14. 2 6.6 2.63 5. 77 50.2 

4132- JDW ., 1.9 31. 2 2. 1 . 79 5.67 12. 2 

4131- JDW 1.2 9.5 3.2 2.94 6.21 63.0 

4130-JDW 1.1 12.0 6.8 2.62 6. 15 56.7 

4129- JDW . 9 33.2 1.5 .67 5. 12 9. 1 

4128-JDW .65 26.9 4.3 1. 80 5. 75 20. 7 

4127- JDW 2. 1 36.6 .85 .45 5. 13 2.3 

4126- JDW 4.0 26. 1 2.9 1. 22 13.70 14.2 

4125- JDW 5.0 24. 1 3.5 1. 66 14.66 1-8. 2 

4124- JDW 3.7 13.9 -- -- -- 39.8 

4123- JDW 1. 45 7. 3 -- -- -- 64.6 

4538-MET 1.1 2.8 -- -- -- 76.5 

4537-MET 1.7 14. 6 -- -- -- 40.0 

4536-MET 1.1 14. 1 -- -- -- 41 . 2 

4535-MET 2.2 12. 0 -- -- -- 49.0 

4534-MET 2.3 11. 3 -- -- -- 56.0 

4533-MET 2.3 20.9 -- -- -- 37.5 

4532-MET 1.4 6.0 -- -- -- 71.4 

4531-MET 1. 2 5.5 -- -- -- 75.0 

4530-MET 2. 2 14.5 -- -- -- 50.9 

4529-MET 4.2 8.0 -- -- -- ' 68.5 

4528-MET 1.6 6. 4 -- -- -- 72.6 

4527-MET 2.4 11.8 -- -- -- 57.6 

4526-MET 2.2 9. 2 -- -- -- 57. 1 

4160- RPS 1.4 4. 1 -- -- -- 72.9 

4159- RPS . 7 2.6 -- -- -- 76. 1 

4158- RPS 1.5 5.8 -- -- -- 64. 7 

4157- RPS 3.5 3.5 -- -- -- 75. 1 

4156- RPS 1.2 2.0 -- -- -- 59.2 

4155- RPS 1.0 19. 9 -- -- -- 29.4 

4154- RPS 1.7 8. 5 -- -- -- 60.5 

Cumulative Thickness x 

thickness percent P 2o5 (feet) (cumulative) 

32. 1 256.66 

32.6 270.56 

33. 1 276. 01 

33.75 299 . 15 

34.35 307. 67 

36.25 366.95 

37.45 378.35 

38.55 391. 55 

39.45 421.43 

40.10 438.92 

42.20 515. 78 

46.20 620 . 18 

51.20 740. 68 

54.90 79 2. 10 

56.35 802. 69 

57 . 45 805. 77 

59. 15 830.59 

60.25 846. 10 

62. 45 872.50 

64. 75 898.49 

67.05 946.56 

68.45 954.96 

69.65 961. 56 

71. 85 993.46 

76.05 1,027.06 

77.65 1, 037.30 

80.05 1,065.62 

82.25 1,085.86 

83.65 1, 091.60 

84.35 1,093.42 

85.85 1, 102. 11 

89.35 1,114.36 

90.55 1,116.76 

91. 55 1, 136. 66 

93.25 1,151.11 
P-1081 Mudstone and phosphate rock------------ 4153- RPS 2.4 8.0 -- -- -- 51. 2 95.65 1,170.31 

P-107 Mudstone, phosphatic and mudstone------ 4152- RPS 1.8 8. 1 -- -- -- 56.8 97.45 1,184.89 

P-106 Phosphate rock, argillaceous, and 

phosphatic mudstone ------------------ 4151- RPS 1.2 18.2 -- -- -- 31. 1 98.65 1, 206. 73 

P-1051 Mudstone, phosphatic ____ _: ______________ 4150- RPS 1.3 12. 0 -- -- -- 47.7 99.95 1, 222. 33 

P-104 Mudstone------------------------------ 4149- RPS 2.4 5. 9 -- -- -- 63.5 102.35 1, 236.49 

P-103 Mudstone------------------------------ 4148- RPS 2.6 4.2 -- -- -- 72.2 104.95 1, 24 7. 41 

P-102 Mudstone------------------------------ 4147- RPS 0 6 . 6 -- -- -- 83.5 105.55 1, 24 7. 77 

P-101 Mudstone------------------------------ 4146- RPS 1.8 5. 0 -- -- -- 73.6 107.35 1, 256. 77 

P-100 Mudstone, phosphatic and phosphate 

rock -------------------------------- 4145

.- RPS 1.6 11. 5 -- -- -- 45.2 108.95 1, 275. 17 

P- 99 I Mudstone, phosphatic and phosphate 

rock--------------------------------- 4144- RPS 1.9 21.8 -- -- -- 28.4 110. 85 1,316.59 

P- 98 Mudstone------------------------------ 4143- RPS 1. 6 2. 7 -- -- -- 76.4 112.45 1, 320. 91 

P- 97 Mudstone and argillaceous phosphate 

rock--------------------------------- 4142- RPS 1.4 13. 5 -- -- -- 41. 6 113. 85 1, 339. 81 

P- 96 Mudstone, phosphatic------------------- 4141- RPS 1.5 8.8 -- -- -- 51. 2 115.35 1,353.01 

P- 95 Phosphate rock, argillaceous, and 

phosphatic mudstone ------------------ 4140- RPS 1. 4 16.6 -- -- -- 30.7 116. 7 5 1,376.25 

P- 94 I Mudstone------------------------------ 4120- RPS 1.2 4.2 -- -- -- 69.5 117.95 1, 381. 29 

P- 93 Mudstone------------------------------ 5555- DFD . 9 6.5 -- -- -- 60.7 118.85 1,387.14 

P- 92 Mudstone------------------------------ 5554- DFD . 7 2.4 -- -- -- 78.3 119.55 1, 388. 82 

P- 91 Mudstone, phosphatic------------------- 5553- DFD . 4 13. 2 -- -- -- 55.2 119.95 1,394.10 

P- 90 Mudstone------------------------------ 5552- DFD 1.7 1. 6 -- -- -- 79.9 121.65 1, 396. 82 

~P- 89 Mudstone------------------------------ 5551- DFD 

. . 8 7.4 -- -- -- 70.5 122.45 1, 402. 74 ~ 

P- 88 Mudstone------------------------------ 5550-HWP 1.4 5. 3 -- -- -- 76.6 123.85 1,410.16 

P- 87 Mudstone------------------------------ 5549-HWP 1.4 . 5 -- -- -- 87.7 125.25 1, 410.86 

P- 86 Mudstone------------------------------ 5548-HWP . 5 .4 -- -- -- 88.3 125.75 1,411.06 

P- 85 Phosphate rock ------------------------ 5547-HWP 1.5 29. 1 -- -- -- 17. 3 127.25 1,454. 71 

P- 84 Mudstone------------------------------ 5546-HWP 1. 3 2.9 -- -- -- 81. 1 128.55 1,458.48 

P- 83 Mudstone------------------------------ 5545-HWP 2. 5 1.1 -- -- -- 84.6 131.05 1, 461. 23 

P- 82 Mudstone------------------------------ 5544-HWP • 8 . 5 -- -- -- 87.8 131.85 1,461.63 

P- 81 Mudstone------------------------------ 5543-HWP 1.6 0 3 -- -- -- 87.8 133.45 1, 462. 11 

P- 80 Mudstone------------------------------ 5542-HWP . 5 1. 4 -- -- -- 84.3 133.95 1, 462.81 

P- 79 Phosphate rock, argillaceous------------ 5541-HWP 1. 5 18. 6 -- -- -- 41.4 135.45 1, 490. 71 

P- 78 Chert --------------------------------- 3050-MET 3.3 . 7 -- -- -- 86. 1 138. 75 1,493.02 

P- 77 Chert -----------...:_ -------------------- 3049-MET 3.4 2.6 -- -- -- 81. 6 142. 15 1,501.86 

P- 76 Mudstone------------------------------ 3048-MET 1. 6 . 7 -- -- -- 87. 1 143.75 1, 502. 98 

P- 75 Phosphate rock, argillaceous--------:----- 3047-MET . 8 17. 8 -- -- -- 40. 1 144.55 1,517.22 

P- 74 Chert, phosphatic, argillaceous --------- 3046-MET 2.2 24.4 -- -- -- 28. 1 146.75 1, 570. 90 

P- 73 Mudstone, phosphatic------------------- 3045-MET 1.0 9. 1 -- -- -- 58.4 149. 75 1, 580. 00 

P- 72 Mudstone------------------------------ 3044-MET 0 8 1.2 -- -- -- 84.9 148.55 1, 580.96 

P- 71 Mudstone, phosphatic------------------- 3043-MET 2.3 9. 5 -- -- -- 61. 8 150.85 1,602.81 

P- 70 Mudstone, phosphatic------------------- 3042-MET 1.1 12. 6 -- -- -- 53. 1 151.95 1,616.67 
I-" 

!).:> 

Bed 

no. 

P-69 

P-68 

P-67 

P-66 

P-65 

P-64 

P-63 

P-62 

P-61 

P-60 

P-59 

P-58 

P-57 

P-56 

P-55 

P-54 

P-53 

P-52 

P-51 

P-50 

P-49 

P-48 

P-47 

P-46 

P-45 

P.-44 

P-43 

P-42 

P-41 

P-40 

P-39 

P-38 

P-37 

P-36 

P-35 

P-34 

P-33 

P-32 

P-31 

Rock description 

~udstone-------------------------------

~udstone, phosphatic, carbona tic---------

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

Mudstone and argillaceous phosphate rock -

~udstone, phosphatic--------------------

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

~udstone, phosphatic--------------------

~udstone, phosphatic, carbonatic---------

Carbonate rock, cherty------------------

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

~udstone-------------------------------

Chert, argillaceous --------------------- ~udstone-------------------------------

~udstone ---------------------------·---- ~udstone------------------------------- # 

~udstone-------------------------------

~udstone. phosphatic--------------------

~udstone-----------~-------------------

Mudstone------------------~------------

~uds~one, phosphatic -------------------

~udstone, phosphatic -------------------

~udstone------------------~------------

~udstone-~-----------------------------

~udstone, phosphatic ------------------- Phosphate rock, argillaceous-------------

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

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

~udstone, phosphatic -------------------

~udstone, phosphatic ------------------- Phosphate rock, argillaceous-------------

~udstone, phosphatic--------------------

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

~udstone, phosphatic--------------------

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

~udstone, phosphatic---------------- ----

~udstone, phosphatic--------------------

South Stewart Canyon-Continued 

Sample Thickness Chemical analyses (percent) 

no. (feet) P2o5 Al2o 3 Fe2o 3 

Loss on Acid 

ignition insoluble 

3041- MET 1.5 6. 7 -- -- -- 64.7 

3040- ~ET 1.2 8. 2 -- -- -- 44.9 

3039- ~ET 0 9 20.4 -- -- -- 26.·4 

3038- ~ET . 8 7.8 -- -- -- 59.6 

3037- ~ET 2.3 9.8 -- -- -- 48.6 

3338- ~ET 1.3 14.6 -- -- -- 34.3 

3337- ~ET 1.1 13.3 -- -- -- 39.9 

4210- ~ET 3.3 8.0 -- -- ··-- 44.2 

4209- MET 2. 7 . 7 -- -- -- 26. 1 

4208- ~ET 3.0 . 3 -- -- -- 16.3 

4207- ~ET 1.7 . 9 -- -- -- 85.9 

4206- ~ET . 9 1. 3 - -- -- -- 87.8 

4205- ~ET 2.9 2. 3 -- -- -- 77.4 

4204- MET 4.9 2.4 -- -- -- 80.9 

4203- ~ET 5.0 6. 7 -- -- -- 69.3 

4202- ~ET 1.7 . 6 -- -- -- 85.0 

4201- ~ET 1.4 2. 7 -- -- -- 80.0 

4200- MET . 9 1.5 -- -- -- 83.7 

4199- ~ET 2.0 4.2 -- -- -- 72.9 

4198- ~ET 2. 1 14.6 -- -- -- 46.7 

4197- ~ET 1.9 6. 3 -- -- -- 67.7 

4196- ~ET • 9 4.0 -- -- -- 76.4 

4195- ~ET 1.3 8.4 -- -- -- 54.2 

4194- ~ET 5.0 14. 1 -- -- -- 38.5 

4240- ~ET • 7 2. 4 -- -- -- 77.7 

5515- JDW 1.1 6. 7 -- -- -- 68.2 

5514- JDW . 8 11. 8 -- -- -- 53.9 

5513- JDW 1.5 17. 0 -- -- -- 33.5 

5512- JDW .85 17.2 -- -- -- 35.8 

5511- JDW 1.0 16. 5 -- -- -- 35.3 

5510- JDW 1. 2 15.4 -- -- -- 42.0 

5509- JDW . 6 12.4 -- -- -- 51. 1 

5508- JDW 2. 1 18.2 -- -- -- 31. 5 

5507- .JDW 4.8 14.4 -- -- -- 43.8 

5506- JDW 4.5 17. 1 -- -- -- 32.8 

5505- JDW . 7 14.8 -- -- -- 41.8 

5504- JDW . 6 14.4 -- -- -- 44.0 

5503- JDW • 5 14.4 -- -- -- 42.7 

5502- JDW . 9 14.4 -- -- -- 43.3 

Cumulative Thickness x 

thickness percent P 20 

(feet) (cuniulativef' 

153.45 1,626. 72 

154.65 1, 636. 56 

155.55 1. 654. 92 

156. 35 1, 661. 16 

158. 65 .1,683.70 

159.95 1, 702.68 

161. 05 1,717.31 

164.35 1, 743. 72 

167.05 1, 745. 61 

170.05 1, 746. 51 

171. 75 1, 748. 04 

172.65 1, 749. 21 

175. 55 1, 755. 88 

180.45 1, 767. 64 

185.45 1, 801. 14 

187. 15 1, 802. 16 

188. 55 1, 805.94 

189.45 1,807.29 

191. 45 1,815.69 

193.55 1, 846. 35 

195.45 1,858.32 

196.35 1, 861. 92 

197.65 1,872.84 

202.65 1,943.34 

203.35 1,945.02 

204.45 1,952.39 

205.25 1,961.83 

206.75 1,987.33 

207.60 2, 001. 95 

208.60 2, 018.45 

209.80 2, 036. 93 

210.40 2,044.37 

212.50 2, 082. 59 

217. 30 2, 151. 71 

221 . 80 2, 228. 66 

222.50 2, 239. 02 

223.10 2,247.66 

223.60 2,254. 86 

224.50 2,267.82 
!--> 

w 

P-30 Phosphate rock, argillaceous-------------I 5501- JDW 1. 4 17. 6 -- -- -- 34. 7 225.90 2, 292. 46 

P-29 Phosphate rock, argillaceous------------- 5500- JDW 3.5 1 7~ 6 -- -- -- 36.8 229.40 2,354.06 

P-28 Phosphate rock, argillaceous------------- 5525- JDW 3.8 20.6 4.8 2.09 14.34 22.8 233.20 2,432.34 

P-27 Mudstone, phosphatic-------------------- 5524- JDW 1. 5 13. 2 7.4 3. 13 9. 59 44.9 234. 70 2, 452. 14 

P-26 Mudstone, phosphatic-------------------- 5523- JDW 1.5 11. 2 7. 2 3.22 10. 11 49.9 236.20 2,468.94 

P-25 Phosphate rock-------------------------- 4122- JDW 1.5 32.9 1.3 1. 19 9. 10 3.4 237. 70 2, 518.29 

P-24 Phosphate rock-------------------------- 4121- JDW 1.0 27.4 1.7 1. 17 12.04 7. 3 238.70 2, 545. 69 

P-23 Carbonate rock~ argillaceous------------- 4107-MAW . 9 2. 4 . 91 1. 18 8.24 33.6 239.60 2, 54 7. 85 

P-22 Carbonate rock, argillaceous, phosphatic-- 4106-MAW 1.1 8.6 4 . 5 1.89 25.93 23.0 240.70 2,557.31 

P-21 Phosphate rock, argillaceous - ------------ 4105-MAW . 6 21. 2 4.4 l. 98 1 o. 19 24.4 241. 30 2,570.03 

P-20 Carbonate rock, argillaceous------------- 4104-MAW . 7 3.7 3.7 1. 45 33.61 19. 1 242.00 2, 572. 62 

P-19 Phosphate rock, argillaceous------------- 4103-MAW . 6 26.8 2.5 1. 10 8.29 16.4 242.60 2, 588. 70 

P-18 Phosphate rock-------------------------- 4102-MAW 2.8 28. 1 2.6 1. 22 7.81 12. 5 245.40 2,667.38 

P-17 Phosphate rock, argillaceous------------- 4101-MAW 3.3 20.0 4.3 l. 91 9.75 30. 2 248.70 2, 733.38 

P-16 Carbonate rock-------------------------- 4100-MAW 1.8 2.;4 1. 7 . 67 37. 57 13. 5 250.50 2,737.7~ 

P-15 Mudstone, phosphatic-------------------- 5522- JDW 2.5 11. 8 6.6 . 24 9. 79 45.3 253.00 2, 767. 20 

P-14 Carbonate rock, argillaceous------------- 5521- JDW 1.0 2. 1 2.8 1. 05 34.54 21. 2 254.00 2, 769.30 

P-13 Phosphate rock, argillaceous------------- 5520- JDW (?) 24.6 2. 5 1. 04 10.26 18.0 -- -- P-12 

Interval, probably small, between beds 

P-13 and P-12. 

P-12 Phosphate rock, argillaceous------------- 4525- RGW . 8 18.5 4.3 3.34 10.29 32.7 *.8 *14.80 

P-11 Mudstone, phosphatic-------------------- 4524- RGW . 9 14.6 6.2 1. 85 10.65 41.9 1.7 27.94 

P-10 Phosphate rock--- ----------------------- 4523- RGW 1.6 29.6 2. 2 . 68 7.82 12. 5 3.3 75. 30 

P- 9 Phosphate rock-------------------------- 4522- RGW 1. 7 30.3 1.9 . 67 7.56 11.8 5. 0 126.81 

P- 8 Phosphate rock, argillaceous------------- 4521- RGW . 7 27. 4 2. 7 . 78 7. 15 18. 0 5.7 145.99 

P• 7 Phosphate rock------------------------: - 4511- RGW 1. 2 31. 1 . 92 . 53 8.04 5.0 6. 9 183.31 

P- 6 Phosphate rock, argillaceous------------- 4244-MAW . 7 24.3 2. 7 1. 30 8.93 19. 7 7. 6 200.32 

P- 5 Mudstone------------------------------- 4243-MAW . 6 1.5 7. 7 3.95 6.24 75.7 8. 2 201. 22 

P- •4 Mudstone, phosphatic, carbonatic --------- 4242-MAW 1.0 9. 6 6.2 2.37 11. 12 44.5 9. 2 210.82 

P- 3 Mudstone, carbonatic -------------------- 4241-MAW . 7 2.4 5. 7 2.05 19.29 45.2 9.9 212.50 

P- 2 

P- 2 Limestone------------:------------------ 4433- DFD 3.8 3.25 -- -- -- 4.0 13. 7 224.85 

P- 1 Phosphate rock-------------------------- 4434- DFD 1. 6 35.5 -- -- -- 3.3 **15.3 **281.65 

Wells formation-top bed only 

Cw-1 I Limestone, siliceous --------------------1 -- I (?) I -- I -- I -- I -- I -- I -- I -- * Cumulative data incomplete because of missing information. Computations start from zero after interruption. 

** Note incompleteness of cumulative data. 
,...._. 

~ 

Pole Canyon, Idaho, lot 1303 

Phosphatic shale member of the Phosphoria formation sampled in bulldozer trench on the west limb of the Boulder Creek anticline, in Pole Canyon, 

sw-;} sec. 31, T. 8 S., B.. 46 E., Caribou County, Idaho. Beds strike N. 10• W. and dip 20• W. Section measured and sampled by M.A. Warner, 

R. A. Smart, F. J. Anderson, R. S. Jones, and R. G. Waring in August 1949. Samples analyzed for P 0 and acid insoluble by U. S. Bureau of 

Mines laboratory, Albany, Oreg., and for other constituents by Trace Elements Section laboratory, U. g, Geological Survey. Washington, D. C. 

Bed Sample Thickness Cumulative Thickness x 

Rock description thickness percent P 20 no. no. (feet) P205 5 (feet) (cumulative) 

Rex chert member of Phosphoria formation- basal bed only 

R- 1 I Chert --------------------------------- I -- I 4. o I -- I -- I -- I -- I -- j 4. o ____ j -- Phosphatic shale member of Phosphoria formation 

P-86 Phosphate rock ------------------------· -- 0.2 -- -- -- -- 0.2 0.2 -- P-85 Mudstone ----------·-------------------- 4225-MAW 1.8 1.9 -- -- -- 77. 7 2. 0 3.42 

P-84 Mudstone ------------------------------ 4224-MAW 3.4 5. 0 -- -- -- 68.8 5.4 20.42 ~ 

Beds P-84, P-85, and P-86 highly 

weathered. 

P-83 Phosphate rock, argillaceous------------ 4223-MAW . 7 21. 9 -- -- -- 32.8 6. 1 35. 75 

P-82 Phosphate ~ock, argillaceous------------ 4222-MAW 1.4 24.2 -- -- -- 27. 7 7. 5 69.63 

P-81 Mudstone ------------------------------ 4221-MAW 1.5 5.0 -- -- -- 69.2 9. 0 77.13 

P-80 1\lludstone ------------------------------ 4432- RAS . 9 2.0 -- -- -- 78. 1 9.9 78.93 

P-79 Mudstone ------------------------------ 4431- RAS . 8 6. 1 -- -- -- 67.6 10. 7 83.81 

P-.78 Phosphate rock------------------------- 4430- RAS 1.2 35.3 1.1 0.44 5.06 4.0 11. 9 126.17 

P-77 Phosphate rock------~------------------ 4429- RAS . 5 3.7.8 . 44 • 16 3.60 2.3 12.4 145.07 

P-76 Phosphate rock---------------------~--- 4428- RAS . 9 34.6 1.4 . 67 7.04 4.4 13.3 176.21 

P-75 Phosphate rock------------------------- 4427- RAS 1.3 33.2 1.2 . 63 2. 12 13. 5 14.6 219.37 

P-74 Mudstone ------------------------------ 4426- RAS 1.1 6. 7 9.7 3.69 5.26 66.6 15. 7 226.74 

P-73 Phosphate rock, argillaceous------------ 4425- RAS 1.1 21. 7 5. 1 1. 93 3.72 34.8 16. 8 250.61 

P-72 Phosphate rock------------------------- 4424- RAS 2.0 34.6 1.3 . 56 2.44 9.0 18. 8 319.81 

P-71 Phosphate rock------------------------- 4423- RAS 1.0 35.9 1.1 . 50 3.80 4. 7 19. 8 355.71 

P-70 Mudstone, phosphatic------------------ - 4422- RAS 1.3 17.2 5.6 2.37 5.44 43.6 21. 1 378.07 

P-69 Phosphate rock------------------------- 4421- RAS 1.7 35.3 1.4 . 54 7.22 5. 8 22.8 438.08 

P-68 Phosphate rock------------------------- 4420- RAS 1.9 35.4 1.3 .45 5.42 4.5 24. 7 505.34 

P-67 Phosphate rock, argillaceous------------ 4419- RAS 1.2 26.5 3.4 1. 43 13.86 15.8 25.9 537. 14 

P-66 Phosphate rock------------------------- 4418- RAS 2.0 30.3 2. 0 . 88 11.64 8. 5 27.9 '597.74 

P-65 Phosphate rock, argillaceous------------ 4417- RAS 1.4 27.0 3.3 1. 34 9.94 16. 5 29.3 635.54 

P-64 Phosphate rock. argillaceous------------ ,4416- RAS 2.6 24.0 3.4 1. 61 13.62 21.0 31.9 697.94 

P-63 Phosphate rock, argillaceous---------- --- 4415- RAS 2.2 18. 2 -- -- -- 32.5 34. 1 737.98 
P-62 Mudstone, phosphatic ------------------- 4220-MAW 1.3 8.4 -- -- -- 58.9 35.4 748.90 

P-61 Mudstone ------------------------------ 4219-MAW 1.4 3. 0 -- -- -- 63.4 36.8 753.10 

P-60 Phosphate rock, argillaceous ------------ 4218-MAW 3.2 17.4 -- -- -- 33.7 40.0 808.78 

P-59 Mudstone. phosphatic ------------------- 4217-MAW 2.6 13.4 -- -- -- 49.2 42.6 843.62 

P-58 Mudstone. phosphatic ------------------- 4216-MAW . 9 15.8 -- -- -- 42.7 43.5 857.84 

P-57 Phosphate rock, argillaceous ------------ 4215-MAW 2.3 18.8 -- -- -- 42.7 45.8 901. 08 

P-56 Mudstone, phosphatic ------------------- 4214-MAW 1.5 16. 5 -- -- -- 46.0 47.3 925.83 

P-55 Mudstone. phosphatic ------------------- 4213-MAW 3.9 9.5 -- -- -- 62.8 51.2 962.88 

P-54 Phosphate rock, argillaceous ------------ 4212-MAW 1.8 21. 8 -- -- -- 29.8 53.0 1, 002.12 

P-53 Mudstone ------------------------------ 4211-MAW 2. 1 5. 1 -- -- -- 69.7 55. 1 1,012.83 

P-52 Mudstone ------------------------------ 4079-MAW 1.2 7.4 -- -- -- 55.2 56.3 1, 021. 71 

P-51 Carbonate rock, argillaceous ------------ 4078-MAW 1.8 

7. 1 -- -- -- 27.8 58. 1 1, 034.49 

P-50 Mudstone ------

- ----------------------- 4077-MAW 2.8 1.9 -- -- -- "79.0 60.9 1, 039. 81 

P-49 Phosphate rock, argillaceous ------------ 4076-MAW 1.9 19.2 -- -- -- 33.0 62.8 1, 076. 29 

P-48 Mudstone, phosphatic-------------------- 4075-MAW 2.0 9. 1 -- -- -- 66.4 64.8 1, 094.49 

P-47 Mudstone --- -------------------------- 5199- FJA 1.9 1.8 -- -- -- 79.6 66.7 1,097.91 

P-46 Phosphate rock, argillaceous ------------ 5198- FJA 3.0 18. 8 -- -- -- 41. 7 69.7 1, 154.31 

P-45 Mudstone, phosphatic ------------------- 5197- FJA 1.0 9. 7 -- -- -- 63.4 70.7 1, 164.01 

P-44 Mudstone ------------------------------ 5196- FJA 2.7 5. 8 -- -- -·- 69.7 73.4 1,179. 67 

P-43 Mudstone, phosphatic ------------------- 5195- FJA 1.1 14.2 -- -- -- 33.0 74.5 1, 195.29 

P-42 Mudstone, phosphatic ------------------- 5194- FJA . 7 10.0 -- -- -- 56.6 75.2 1, 202. 29 

P-41 - Mudstone, phosphatic ------------------- 5193- FJA 2.6 13.4 -- -- -- 38.4 77.8 1,237.13 

P-40 Mudstone, phosphatic ------------------- 5192- FJA 3.6 12. 1 -- -- -- 50. 1 81.4 1,'280. 69 

~---'-P-39 Mudstone ------------------------------ 5191- FJA 1.2 5.4 -- -- -- 59.9 82.6 1,287.17 01P-38 Mudstone ------------------------------ 5190- FJA 2. 1 2. 6 -- -- -- 74.0 84. 7 1, 292. 63 

P-37 Mudstone ------------------------------ 5189- FJA 2.4 2.6 -- -- -- 70.8 87. 1 1,298.87 

P-36 Mudstone ------------------------------ 5188- FJA 1.1 2.4 -- -- -- 78.3 88.2 1, 301. 51 

P-35 Mudstone ------------------------------ 5187- FJA 1.6 .4 -- -- -- 84.7 89.8 1, 302. 15 

P-34 Phosphate rock, argillaceous and 

mudstone----------------------------- 5186- FJA 2.2 10.5 -- -- -- 56.3 92.0 1, 325. 25 

P-33 Mudstone -----

----------------------- _ -- 5185- FJA 1.4 1.6 -- -- -- 82.9 93.4 1, 327.49 

P-32 Mudstone, phosphatic------------------- 5184- FJA 3.6 9.9 -- -- -- 54.4 97.0 1, 363. 13 

P-31 Mudstone, phosphatic ------------------- 5183- FJA 1.8 11. 9 -- -- -- 51. 1 98.8 1,384.55 

P-30 Mudstone, phosphatic ------------------- 5182- FJA 3.9 14.8 -- -- -- 38.7 102.7 1,442.27 

P-29 Mudstone, phosphatic and phosp~ate 

rock--------------------------------- 5181- FJA 3.7 17.9 -- -- -- 33.3 106.4 1, 508. 50 

P-28 I Phosphate rock ------------------:------ 5180- FJA 2.5 28.6 -- -- -- 12. 1 108.9 1, 580. 00 

P-27 Carbonate rock ------------------------ 4414-

·RAS 3~0 2. 4 -- -- -- 12.2 111.9 1, 587. 20 

P-26 Mudstone, phosphatic ------------------- 4413- RAS 1.8 13. 9 -- -- -- 45.3 113. 7 1. 612.22 

P-25 Mudstone, phosphatic ------------------- 4412- RAS 2.2 13.4 -- -- -- 46.3 115.9 1, 641. 10 

P-24 Mudstone, phosphatic------------------- 4411- RAS 1.8 11. 1 -- -- -- 50.3 117.7 1, 661. 68 

P-23 Mudstone, phosphatic ------------------- 4410- RAS 1.9 10. 1 -- -- -- 55.0 119.6 1, 680.87 

P-22 Carbonate rock, argillaceous ------------ 4409- RAS 2.0 3. 1 -- -- -- 28.3 121. 6 1, 687.07 
I-' 

Q:l 

Pole Canyon-Continued 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

no. Rock description no. (feet) P2o5 Al2o 3 Fe2o 3 

Loss on Acid thickness percent P 2o5 ignition insoluble (feet) ( cumula ti ye) 

P-21 Phosphate rock, argillaceous------------- 4408- RAS 1.9 27.0 2.7 1. 19 8.96 16. 7 123.5 1, 738. 37 

P-20 Phosphate rock, argillaceous------------- 5166- RSJ 2. 1 22.5 4.0 1. 44 7.56 29. 1 125. 6 1,785.62 

P-19 Carbonate rock, argillaceous------------- 5164- RS.J . 9 1.1 2.7 .99 32. 78 21.9 126.5 1, 786. 61 

P-18 Phosphate rock-------------------------- 5163- RSJ . 9 . 29.0 2. 1 . 86 8.00 12. 1 127.4 1,812.71 

P-17 Phosphate rock-------------------------- 5162- RSJ 1.3 29.6 2.3 1. 01 6.52 14.3 128.7 1,851.19 

P-16 Phosphate rock-------------------------- 5161- RSJ 2.6 31.4 1.7 . 73 6.87 10.2 131.3 1, 932. 83 

P-15 Phosphate rock, argillaceous------------- 5204- RGW 1.0 22. 1 4.2 1.33 8.02 27.8 132.3 1,954.93 

P-14 Phosphate rock, contains carbonate rock lem 5203-RGW 1.0 26.2 3.2 1.7 7. 70 17. 1 133.3 1, 981. 13 

P-13 Carbonate rock, phosphatic--------------- 5202- RGW . 8 8.4 1.3 . 58 31.06 10.4 J34.1 1,987.85 

P-12 Phosphate rock, argillaceous, carbonatic -- 5201- RGW . 7 16. 7 4.7 1. 14 16.56 21.0 134. 8 1, 999. 54 

P-11 Phosphate rock, argillaceous-----------... - 5200- RGW l. 8 26.3 3.3 1. 17 6.48 20.3 136. 6 2, 046. 88 

P-10 Phosphate rock, aq~illaceous ------------- 5160- RGW . 6 24.4 3.5 1. 77 6.32 24.5 137. 2 2, 061. 52 

P- 9 Phosphate rock-------------------------- 5159- RGW . 9 33. 3 1.0 .43 5. 74 4.9 138. 1 2, 091.49 

P- 8 Phosphate rock-------------------------- 5158- RGW . 7 34.2 .67 .34 6.66 3. 3 138.8 2, 115.43 

P- 7 Phosphate rock-------------------------- 5157-RGW .8 32. 7 1.1 . 50 7.04 4.5 139.6 2, 141. 59 

P- 6 Phosphate rock-------------------------- 5156-RGW . 9 34.3 . 68 . 41 5.68 2.5 140. 5 2, 172.46 

P- 5 Phosphate rock-------------------------- 5155- RGW . 9 35.6 . 55 .31 4.42 2.5 141.4 2, 204. 50 

P- 4 ~udstone------------------------------- 5154- RGW . 7 4. 2 -- -- -- 66.7 142. 1 2, 207.44 

P- 3 Mudstone, carbonatic and limestone------- 5153- RGW 2.0 . 5 . -- -- -- 31. 7 144. 1 2, 208. 44 

P- 2 Carbonate rock, argillaceous------------- 5152- RGW 1. 1 1.2 -- -- -- 39.8 145. 2 ].. 209. 76 

P- 1 Phosphate rock-------------------------- 5151- RGW . 3 32.0 -- -- -- 5.2 145.5 2, 219.36 

Wells formation-top bed only 

Cw-1 I carbonate rock--------------------------1 5150- RGW I 0. 8 ·I 2:1 I -- I -- I -- I 4. 2 I O. 8 J----- -- I 
f--" 

--J 

Spectrographic Analyses-Pole Canyon, Idaho, lot 1303 

Semiquantitative analyses of samples of the phosphatic shale member of the Phosphoria formation, Pole Canyon, Idaho (see immediately preceding pages for 

location of section, thickness and description of strata, and chemical analyses of samples), made by U. S. Geological Survey, Geochemistry and Petrology 

Branch, Washington, D. C. In addition to the elements listed in the table below, Sb, As, Bi, Cd, Ce, Cs, Cr, Co, Dy, Er, Eu, Gd, Ge, ,Au, Hf, In, Ir, 

Li, Lu, Hg, Nd, Os, Pd, Pt, Pr, Re, Rh, Rb, Ru, Sm, Ta, Te, Tb, Tl, Th, and W were looked for in all samples but were not detected. 

Bed 

no. 

P-86 

P-85 

P-84 

P-83 

P-82 

:P-81 

P-80 

P-79 

P-78 

P-77 

P-76 

P-75 

P-74 

P-73 

P-72 

P-71 

P-70 

P-69 

P-68 

P-67 

P-66 

P-65 

P-64 

P-63 

P-62 

P-61 

P-60 

P-59 

P-58 

P-57 

P-56 

Sample no. Al Ba Be B Ca Cr Cu Ga 

-- -- -- -- -- -·- -- -- -- 4225-MAW A E ND E B' E E F . 

4224-MAW A E ND E B' D E F 

4223-MAW B' E G E A E E F 

4222-MAW B' E G E A E E F 

4221-MAW B' E G E B' D E F 

4432- RAS B' E G E B' E E F 

4431- RAS B' E ND E B' D E F 

4430- RAS B' E ND F A D E F 

4429- RAS B' E ND F A E E F 

4428- RAS B' E ND F A D E F 

4427- RAS B' E ND F A E E F 

4426- RAS B' E G E B' E E F 

4425- RAS B' E G E A E E F 

4424- RAS B' E ND F A E E F 

4423- RAS B' E ND F A E E F 

4422- RAS B' E G E A D E F 

4421- RAS B' E ND F A E E F 

4420- RAS B' E G F A D E F 

4419- RAS B' E ND F A D E F 

4418- RAS B' E ND F A D E F 

4417- RAS B' E ND F A D E F 

4416- RAS B' E ND F A D E F 

4415- RAS B' E G E A D E F 

4220-MAW B' E G E B' E E F 

4219-MAW B' E G E B' D E F 

4218-MAW B' E G E A D E F 

4217-MAW B' E G E B' D E F 

4216-MAW B' E G E B' E E F 

4215-MAW B' E G E B' E E F 

4214-MAW A E ND E B' D E F 

Explanation of Symbols 

A = more than 1 o

1 percent 

B'= 1-10 percent 

D = o. 1-1 percent 

E = 0. 01-0. 1 percent 

Ho Fe La Pb Mg Mn 

-- -- -- -- -- -- F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E ND D E 

F D E F D F 

F D E F E F 

F B' E F D E 

F B' E F E F 

F B' E F D E 

F B' E F D E 

F D E E E F 

F D E F E F 

F B' :If F D E 

F D F F D F 

F D F F D F 

F B' E F D E 

F B' F F D F 

F B' F F D F 

F B' F F D F 

F B' F F D F 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

F B' E F D E 

Mo 

--

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F 

F = 0.001-0.001 percent 

G = less than o. 001 percent 

ND = not detectzd . 

V =vanadium 

Ni Nb p K Sc Si Ag 

-- -- -- -- -- -- -- E E D B' F A G 

E E B' B' F A G 

E ND B' B' F A G 

E ND B' B' F A G 

D ND D B' F A G 

E E D B' F A G 

E E D B' F A G 

E E B' B' -F B' G 

E E B' D F D G 

E E B' B' F B' G 

E E B' D F B' G 

E E D B' F A G 

E E B' B' F B' G 

E E B' B' F B' G 

E E B' B' F D G 

E E B' B' F. B' G 

E ND B' D F B' G 

E ND B' D F B' G 

D E B' B' F B' G 

D E B' B' F B' G 

D E B' B' F B' G 

D E B' B' F B' G 

D E B' B' F B' G 

D ND B' B' F A G 

D ND D B' F A G 

D E B' B' F A G 

D ND B' B' F A G 

D E B' B' F A G 

D ND B' B' F A G 

D E B' B' FIA G 

Na Sr Tm 

-- -- -- B' F E 

B' F E 

B' E E 

B' E E 

B' E E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F E 

B' F D 

B' F D 

B' F D 

B' F E 

B' F E 

B' E E 

B' E E 

B' E E 

B' E E 

B' E E 

B' E E 

B' F E 

~B' is equivalent to B and C of Bureau of Mines analyses as recorded in other reports. 

Vanadium determined by a "quickie" quantitative method, accuracy estimated at! 10-15 percent of vanadium present. 

Sn Ti v Yb y Zn Zr 

-- -- -- -- -- -- -- F D 0.03 G E E E 

F E • 03 G E E E 

F E • 03 F E E E 

F E • 04 F E E E 

F E . 06 G E E E 

F D 0 07 G E E E 

F D . 06 G E E. F 

F E • 06 G E E E 

F E . 06 G E E F 

F E • 08 G E E E 

F E 0 04 G E E E 

F D 0 07 G E E E 

F D • 08 G E E E 

F E • 04 G E E E 

F E . 07 G E E E 

F D 0 06 G E E E 

F E 0 09 G E E E 

F E • 08 G E E E 

F E .10 G E E E 

F E • 20 G E E E 

F E 0 1 G E E E 

F E . 08 G E E E 

F E • 09 G E E F 

F E • 08 G ND E E 

F E • 09 G E E E 

F E • 09 F E E E 

F E • 07 G E E E 

F E • 06 G E E E 

F E • 05 G E E E 

F E • 05 F E E E 
f-' 

co 

Bed 

no. 

P-55 

P-54 

P-53 

P-52 

P-51 

P-50 

P-49 

P-48 

P-47 

P-46 

P-45 

P-44 

P-43 

P-42 

P-41 

P-40 

P-39 

P-38 

P-37 

P-36 

P-35 

P-34 

P-33 

P-32 

P-31 

P-30 

P-29 

P-28 

P-27 

P-26 

P-25 

P-24 

P-23 

P-22 

P-21 

P-20 

P-19 

P-18 

P-17 

P-16 

P-15 

P-14 

Sample no. 

4213-MAW 

4212-MAW 

4211-MAW 

4079-MAW 

4078-MAW 

4077-MAW 

4076-MAW 

4075-MAW 

5199- FJA 

5198- FJA 

5197- FJA 

5196- FJA 

5195- FJA 

5194- FJA 

5193- FJA 

5192- FJA 

!:j191- FJA 

5190- FJA 

5189- FJA 

5188- FJA 

5187- FJA 

5186·- FJA 

5185- FJA 

5184- FJA 

5183- FJA 

5182- FJA 

5181- FJA 

5180- FJA 

4414- RAS 

4413- RAS 

4412- RAS 

4411- RAS 

4410- RAS 

4409- RAS 

4408- RAS 

5166- RSJ 

5164- RSJ 

5163- RSJ 

5162- RSJ 

5161- RSJ 

5204- RGW 

5203- RGW 

Al Ba Be 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' E G 

B' F ND 

B' E G 

B' E ND 

A E ND 

B' E ND 

B' E ND 

B' E G 

B' E ND 

B' E ND 

B' E ND 

B' E ND 

B' E ND 

B' E G 

B' E G 

B Ca Cr Cu 

E B' E E 

E A D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E A D E 

E B' E E 

E B' D E 

E B' E E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' D E 

E B' E E 

E B' D E 

E B' D E 

E A D E 

E A D E 

F A D E 

F A E E 

E A D E 

E A D E 

F B' D E 

E A D E 

F A E E 

F A D E 

F A E E 

F A F E 

F A E E 

F A E E 

F A E E 

F A D E 

F A D E 

Spectrographic Analyses-Pole Canyon-Continued 

Ga Ho Fe La Pb Mg Mn Mo Ni Nb p K 

F F B' E F D E F E ND B' B' 

F F B' E F D E F D E B' B' 

F F B' E F D E F D ND B' B' 

F F B' E F D E F D E B' B' 

F F B' E F - l) E F D ND B' B' 

F F B' E F D E F D ND D B' 

F F B' E F i) E F D E B' B' 

F F B' E F D E F D E B' B' 

F F B' E F D E F E ND B' B' 

F F B' E F D E F E ND B' B' 

F F B' E F D E F E ND B' B' 

F F B' E F D E F E ND B' B' 

F F B' E F D E F E - E B' B' 

F F B' E F D E F E ND B' B' 

F F B' E F D E F D E B' B' 

F F B' E F D E F D E B' B' 

F F B' E F D E F D E B' B' 

F F B' E F D ~ F E E D B' 

F F B' E F D E F D E D B' 

F F B' E F D E F E E D B' 

F F B' E F D E F E E D B' 

F F B' E F D E F E E B' B' 

F F B' E F D E F E E D B' 

F F B' E F D E F E E B' B' 

F F B' E F b E F E E B' B' 

F F B' E F D E F E E B' B' 

F F B' E F D E F E E B' B' 

F F B' E F D E F E E B' B' 

F F D F F B' . E F E ND D D 

F F B' F F D E F D E B' B' 

F F B' E F D E F D E B' B' 

F F B' E ND D E F · D E B' B' 

F F B' E F D E F D E B' B' 

F F B' F F B' E F E E D B' 

F F D F F D F F E E B' B' 

F F B' E F D E F D ND D B' 

F F D E F D E F E ND B' D 

F F D E F D E F E ND B' B' 

F F D E F D E F E ND B' B' 

F F D E F D E F E ND B' D 

F F B' E F D E ND E ND B' B' 

F F B' E F D E F E ND B' B' 

Sc Si Ag Na Sr Tm Sn Ti v Yb y Zn Zr 

F A G B' E E · F E 0.05 G E E E 

F B' G B' E E F E • 05 F E E E 

F A G B' E E F E • 06 G ND E E 

F A G B' E E F E • 08 F E E E 

F A G B' E E F E 0 09 F E E E 

F A G B' E E F E • 08 G E E E 

F B' G B' E E F E . 07 F E E F 

F A G B' E E F E • 06 F E E E 

F A G B' F E F D 0 08 G E E E 

F A G B' F E F D • 06 G E E E 

F A G B' F E F D • 04 G E E E 

F A G B' F E F D 0 07 G E E E 

F A G B' F E F E . 06 G E E E 

F A . G B' F E F D 0 05 G E E E 

F A G B' E E F E • 05 G E E E 

F A G B' E E F E • 05 G E E E 

F ~ 1--G B' E E F E 0 07 G E E E 

F .LOL ~ u B' E E F E • 07 G E ND E 

F A G B' E E F E • 07 G E E E 

F A G B' E E F E • 08 G E g E 

F A G B' E E F E 0 07 G E E E 

F A G B' E E F E · • 04 G E E E 

F A G B' E E F D • 06 G E E E 

F A G B' E E F E • 05 G E E E 

F A G B' E E F E • 05 G E E E 

F B' G B' E E F E 0 06 G E E E 

F B' G B' E E F E • 07 G E E E .. F B' G B' E E F E • 06 G E E E 

F D G B' F E F E • 01 G E F E 

F B' G B' F E F D • 02 G E E ND 

F B' G B' F E F E . 02 G E E E 

F A G B' F E ND D 0 02 G E E E 

F B' G B' F E F E 0 04 G E E E 

F B' G B' F E F E • 01 G E E F 

F B' G B' F D F E 0 23 G E E F 

F B' G B' F E ND D • 09 G E E E 

F B' G B' F E ND D 0 01 G F E E 

F B' G B' F E F E • 09 G E E E 

F B' G B' F E F E 0 08 G E E E 

F B' G B' F E ND E • 08 G E E E 

F B' G B' F E F D • 09 G E E E 

F B' G B' F E F E • 07 G E E E 
...... 

t:0 

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 

Cw-1 

5202-RGW 

5201-RGW 

5200-RGW 

5160-RGW 

5159-RGW 

5158-RGW 

5157-RGW 

5156-RGW 

5155-RGW 

5154-RGW 

5153-RGW 

5152-RGW 

5151-RGW 

5150-RGW 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

B' E 

D E 

G F A E 

G F A D 

G F A D 

ND F A E 

ND F A E 

ND F A E 

ND F A D 

ND F A F 

ND F A F 

ND F B' E 

ND F A F 

ND E A E 

ND F A E 

G F A E 

E F F D F F D E 

E F F D E F B' E 

E F F D E F D E 

E F F D E F D E 

E F F D E ND D E 

E F F D E ND D E 

E F F D E F D E 

E F F D E F D E 

E F F ti E F D E 

E F F D E F D E 

E F F D E F B' E 

E F F B' E F B' E 

E F F D E F D F 

E ND F B' E F B' F 

F E ND B' D F B' G B' F E F E • 04 G E E E 

F E ND B' B' F B' G B' F E F E • 07 G E E E 

F E ND B' B' F B' G B' F E F E • 05 G E E E 

F D ND B' B' F B' G B' F E ND D 0 04 G E E E 

F E ND B' D F B' G B' F E ND E • 06 G E E E 

F E ND B' D F B' G B' F E ND E • 07 G E E E 

F E ND B' D F B' G B' F E F E 0 09 G E E E 

F E ND B' D F B' G B' F E F E • 09 G E E E 

F E ND B' D F B' G B' F E F E • 06 G E E E 

F D ND D B' F A G B' F E ND D • 09 G E E E 

F E ND B' B' F B' G B' F E ND E 0 03 F E E E 

F E E D B' F B' G D F E F D 0 05 G E E E 

F E E B' D F B' ND B' F E F E • 03 G E E F 

F F E D D. F D ND D F E F E o. 01 G E E E 
£:\:) 

0 

Lone Pine Springs, Idaho, lot 1298 

Phosphatic shale member of the Phosphoria formation· sampled in bulldozer trench on the west limb of the Snowdrift anticline near Lone Pine Springs~ 

NEi -sec. 4, T. 9 S., R. 45 E.~ Caribou County, Idaho. Section measured and sampled b)l M.A. Warner~ R. A. Smart, R. G. Waring, R. S. Jones, 

and R. P. Sheldon in July 1949. Samples analyzed for P2 0...5 and acid insoluble by U.S. Bureau of Mines laboratory, Albany, Oreg., and for other 

constituents by Trace Elements Section laboratory~ U. S: Geological Survey~ Washington. D. C. 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description I I ,, Loss on I Acid thickness percent P 20 no. no. (feet) P 205 Al203 Fe203 ignition insoluble (feet) (cumulativef 

Rex chert member of Phosphoria formation- basal bed only 

R- 11 I Chert ---------------------------------1 -- I 1. 8 I -- I -- I -- I -- L -- I 1. 8 I 

Phosphatic shale member of Phosphoria formation 

P-115 Mudstone------------------------------ 5080-MAW 0.9 2. 1 -- -- -- 84.4 o. 9 1. 89 

P-114 Phosphate rock~ argillaceous------------ . 5006-MAW 0 5 29.6 -- -- -- 17. 1 1. 4 16.69 

P-113 Mudstone------------------------------ .5007-MAW . 7 3. 6 -- -- -- 73.8 2. 1 19.21 

P-112 Mudstone ------------------------------- 5008-MAW . 9 2.8 -- -- -- 69. 7 3.0 21. 73 

P-111 Mudstone ------------------------------ · 5009-MAW 2.0 2.0 -- -- -- 75.0 5.0 25. 73 

P-110 Mudstone ------------------------------ 5010-MAW 2.3 . 9 -- -- -- 79.0 7.3 27.80 

P-109 Mudstane --------...,--------------------- 5011-MAW 3.2 1.0 -- -- -- 79.2 10. 5 31.00 

P-108 Mudstone ----------------- ___ ------ ____ 5012-MAW 1.1 . 9 -- -- -- 77. 7 11. 6 31.99 

P-107 Mudstone------------------------------ 5013-MAW 3.3 3. 7 -- -- -- 70.3 14.9 44.20 

P-106 Phosphate rock, argillaceous------------ 5014-MAW 1.0 27.8 2.8 1. 24 4.08 21.1 15.9 72.00 

P-105 Mudstone ------------------------------ 5015-MAW 2.2 3. 8 9.5 3.34 5.88 71. 7 18. 1 80.36 

P-104 Phosphate rock ------------------------ 5016-MAW 1.5 36.9 1.2 . 82 4.08 2. 8 19.6 135.71 

P-103 Phosphate rock ------------------------ 5017-MAW • 9 35. 7 1.5 . 67 5.96 2.8 20.5 167.84 

P-102 Phosphate rock ------------------------ 5018-MAW 1.0 36.5 1.2 . 50 2.56 4.9 21. 5 204.34 

P-101 Mudstone------------------------------ 5019-MAW 1.5 6. 6 8.8 3.23 4.94 66.7 23.0 214.24 

P-100 Phosphate rock and argillaceous 

phosphate rock------------------------ 5081-MAW . 7 29.6 3.2 1. 32 3.56 18.0 23.7 234.96 

P- 99 Phosphate rock, argillaceous--------.;.--:-- 5082-MAW . 4 18.3 6.0 2. 10 4.84 41.8 24. 1 242.28 

P- 98 Phosphate rock------------------------- 5083-MAW . 9 31. 7 2.5 1. 07 3.36 13.4 25.0 270.81 

P- 97 Phosphate rock------------------------- 5084-MAW 1.0 34.1 1.5 . 59 3.22 9.6 26.0 304.91 

P- 96 Mudstone------------------------------ 5085-MAW . 6 7. 1 8.5 3.29 8.32 63.7 26.6 309.17 

P- 95 Phosphate rock------------------------- 5086-MAW 1.2 36.2 . 78 . 23 3.08 6.4 27. 8 352~61 

P- 94 Mudstone, phosphatic------------------- 5087-MAW . 7 14.3 6.7 2.80 8.20 47.9 28.5 362.62 

P- 93 Phosphate rock------------------------- 5088-MAW . 6 34.6 1.4 .38 4.26 ·8. 0 29. 1 383.38 

P- 92 Phosphate rock, argillaceous------------ 5089-MAW . 5 20.3 5.6 1. 30 10.06 30.3 29.6 393.53 

P- 91 Phosphate rock------------------------- 5090-MAW 1.2 35.8 1.1 ' 72 2.76 6.0 30.8 43,6.49 

P- 90 Mudstone, phosphatic------------------- 5091-MAW 1.3 11. 7 6.8 2.84 5.34 55. 7 32. 1 451.70 

P- 89 Phosphate rock------------------------- 5020- RAS 1.0 31.9 2.0 • 76 1. 84 13. 5 33. 1 483.60 

P- 88 Phosphate rock------------------------- 5021- RAS . 9 38.5 . 77 . 44 2.70 1.2 34.0 518.25 
~, --.. 

------ P- 87 Phosphate rock ------------------------ 5022- RAS 1.5 33.5 2.3 l. 11 3.92 8. 7 35.5 568.50 

P- 86 Phosphate rock ------------------------ 5023- RAS 1.2 27.

-4 2.9 l. 96 9.82 14.8 36.7 601.38 

P- 85 Phosphate rock -----~~-------------- 5024- RAS 1.5 32.5 1.7 . 51 8. 54 6.3 38.2 650.13 

P-· 84 Phosphate rock, argillaceous ___ _; ________ 5025- RAS 2.0 25.8 3.4 1. 24 13.56 16. 1 40.2 701.73 

P- 83 Phosphate rock, argillaceous------------ 5026- RAS 2.2 22.6 4.0 1. 34 14.36 22.2 42.4

- 751.45 

P- 82 Nludstone------------------------------ 5027- RAS 2.3 6.5 -- -- -- 61.9 44. 7 766.40 

P- 81 Nludstone, phosphatic------------------- 5028- RAS 2. 5 15.4 -- -- -- 38.0 47.2 804.90 

P- 80 Nludstone, phosphatic;, carbonatic -------- 5029- RAS 2.0 10. 7 -- -- -- 37.9 49.2 826.30 

P- 79 Nludstone, phosphatic------------------- 5030- RAS 2.2 12. 8 -- -- -- 51.0 51.4 854.46 

P- 78 Phosphat~ rock, argillaceous------------ 5031- RAS 1.3 24.2 -- -- -- 29.5 52. 7 885.92 

P- 77 Nludstone-----------------------: ______ 5032- RAS • 5 4.5 -- -- -- 73.0 53.2 888.17 

P- 76 Nludstone, phosphatic------------------- 5033- RAS 1.0 1 o. 1 -- -- -- 61. 7 54.2 898.27 

P- 75 Phosphate rock, argillaceous------------ 5034- RAS . 8 20.7 -- -- -- 34. 1 55.0 914.83 

P- 74 Mudstone, phosphatic------------------- 5035- RAS . 8 12. 2 -- -- . -- 54.2 55.8 924.59 

P- 73 Mudstone------------------------------ 5036- RAS 1.6 7. 5 -- -- -- 66.8 57.4 936.59 

P- 72 Nludstone------------------------------ 5037- RAS 1.4 6.4 -- -- -- 67.3 58.8 945.55 

P- 71 Mudstone, phosphatic------------------- . 5038- RAS 1.4 8.6 -- -- -- 64.2 60.2 957.59 

P- 70 Phosphate rock, argillaceous------------ 5039- RAS 1.5 18.4 -- -- -- 40.2 61. 7 985. 19 

P- 69 Nludstone------------------------------ 5092- RAS 1.4 5.6 -- -- -- 67.3 63. 1 993.03 

P- 68 Mudstone_..:_ _______ -------------------- 5093- RAS 1.2 2. 7 --

- -- -- 76.5 64.3 996.27 

P- 67 Nludstone------------------------------ 5094- RAS 2.0 3.0 -- -- -- 67. 1 66.3 1,002.27 

P- 66 Mudstone------------------------------ 5095- RAS 1.3 4.2 -- -- -- 70.4 67.6 1, 007.73 

P- 65 Nludstone----------------------------7- 5040- RSJ 2.0 2. 8 -- -- -- 75.0 69

. 6 l, 013. 33 

P- 64 ~udstone------------------------------ 5041- RSJ 1.2 3.5 -- -- -- 72.3 70.8 1,017.53 

~ P- 63 Phosphate rock, argillaceous------------ 5042- RSJ • 2 24.5 -- -- -- 23.5 71. 0 1,022.43 

P- 62 Mudstone, phosphatic------------------- 5043- RSJ . 7 14. 3 -- -- -- 61.0 71. 7 1,032.44 

P- 61 Nludstone------------------------------ 5044- RSJ 2.6 7. 5 -- -- -- 66.0 74.3 1, 051.94 

P- 60 Nludstone, phosphatic------------------- 5045- RSJ 2.8 14.4 -- -- -- 38.0 77. 1 1, 092. 26 

P- 59 Nludstone, phosphatic------------.:..------ 5046- RSJ 2.5 10. 5 -- -- -- 58.5 79.6 1, 118.51 

P- 58 Mudstone------------------------------ 5047- RSJ 0 7 3. 1 -- -- -- 76.5 80.3 1, 120.68 

P- 57 Mudstone, phosphatic and mudstone------ 5048- RSJ 1.7 3.0 -- -- -- 83.0 82.0 1,125.78 

P- 56 Nludstone------~--------------- ------- 5049- RSJ 1.6 . 7 -- -- -- 83.6 83.6 1,126.90 

P- 55 Mudstone------------------------------ 5050- RSJ 1.8 7. 5 -- -- -- 69.8 85.4 1, 140. 40 

P- 54 Nludstone------------------------------ 5051- RSJ 1.2 1.2 -- -- -- 87.2 86.6 1, 141.84 

P- 53 Mudstone------------------------------ 5052- RSJ 3.0 • 6 -- -- -- 85.9 89.6 1, 143. 64 

P- 52 Nludstone, phosphatic------------------- 5053- RSJ . 6 1 o. 1 -- -- -- 64.7 90.2 1, 149" 70 

P- 51 Mudstone------------------------------ 5054- RSJ 1. 5 . 4 -- -- -- 90.2 91. 7 1, 150. 30 

P- 50 Mudstone, phosphatic------------------- 5055- RSJ 2.0 18. 2 -- -- -- 45.8 93.7 1, 186.70 

P- 49 Mudstone, phosphatic and mudstone ------ 5056- RSJ 1.5 8.6 -- -- -- 64.2 95.2 1, 199.60 

P- 48 Mudstone------------------------------ 5057- RSJ 2.4 4.4 -- -- -- 72.8 97.6 1; 210. 16 

P- 471 Mudstone, phosphatic-------------------~ 5058- RSJ 2.4 14.4 -- 38.3 100.0 I -- -- 1,244.72 

P- 46 Mudstone, phosphatlc ------------------- 5059- RSJ 2.3 13.0 -- -- -- 42.8 102.3 1, 274.62 

P- 45 Mudstone and phosphate rock------------ 5060- RPS 1. 7 15.9 -- -- -- 40.4 104.0 1, 301. 65 
M 

M 

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 

Sample Rock description no. 

. Mudstone-_ .... .;:----------------------------- 5061- RPS 

Mudston·e- _:.. ~- ---- ----------------------- 5062- RPS 

Chert and mudstone ----------·---------- 5063- RPS 

Mudstone------------------------------- 5064- RPS 

Mudstone------------------------------- 5065- RPS 

Mudstone---------~--------------------- 5066- RPS 

Mudstone------------------------------- 5067- RPS 

Mudstone------------------------------- 5068- RPS 

Muds tone and phosphatic muds tone -------- 5069- RPS 

Mudstone, phosphatic-------------------- 5070- RPS 

Mudstone------------------------------- 5071- RPS 

Mudstone and phosphate rock------------- 5072- RPS 

Mudstone and argillaceous phosphate rock-- 5073- RPS 

Mudstone and phosphate rock------------- 5074...: RPS 

Mudstone, phosphatic and phosphate roc-k.-- 5075- RPS 

Mudstone, phosphatic-------------------- 5076- RPS 

Phosphate rock------------------------- 5077- RPS 

Phosphate rock, argillaceous------------- 5078- RPS 

Phosphate rock, argillaceous------------- 5096- RAS 

Mudstone, phosphatic--------------------· 5097- RAS 

Mudstone, phosphatic-------------------- 5098- RAS 

Mudstone, phosphatic-------------------- 5099- RAS 

Mudstone, phosphatic-------------------- 5100- RAS 

Mudstone------------------------------- 5101- RAS 

Phosphate rock, argillaceous------------- 5102- RAS 

Phosphate rock, argillaceous------------- 5103- RAS 

Mudstone, phosphatic _________ _; ___ ------- 5104- RAS 

Phosphate rock ------------------------- 5105- RAS 

Samples 4501-4509-RGW and 4512-

4520-RGW collected in second trench 

400 feet up gulley. Beds P-4 through 

P-18 much crumpled and weathered. 

Samples 4512-RGW and 4513-RGW are 

equivalent to 5104-RAS and 5105-RAS, 

respectively. 

Mudstone-------------------------------· 4512-RGW 

Phosphate rock ------------------------- 4513-RGW 

Phosphate rock ------------------------- 4514-RGW 

Lone Pine Springs-Continued 

Thickness Chemical analyses (percent) 

(feet) P2o5 AI2o 3 Fe2o 3 

LOSS on ACld 

ignition insoluble 

3.3 3. 1 -- -- -- 73. 7 

1.1 1.4 -- -- -- 81.4 

1.7 1.4 -- -- -- 88.9 

2.8 4.5 -- - -- 73. 7 

2. 0 1.8 -- -- -- 84.0 

3. 1 5.8 -- -- -- 72. 1 

2.8 4.4 -- -- -- 75.2 

2.3 1.7 -- -- -- 83.0 

1.2 10.0 -- -- -- 56. 7 

3.0 11. 5 -- -- -- 55. 7 

1.1 5. 7 -- -- -- 68.2 

z. 7 20.4 7. 0 2.82 7.24 33.3 

3.2 16.3 8.2 3.19 7. 76 43. 7 

2. 7 20.5 7. 1 2.57 7. 72 32. 7 

3.5 24.3 5.6 2.16 8. 74 22.5 

. 5 13.8 8.6 3.36 7.56 47.3 

2.0 29.5 2.9 1. 79 -6. 16 14.0 

1.0 26.3 3.9 1. 63 6.30 22.0 

1.3 23.0 5. 1 1. 86 6.48 30.8 

1.1 13.2 -- -- -- 52.2 

1.5 15. 6 -- -- -- 46.0 

1.6 14.6 -- -- -- 48.3 

1.4 11. 9 -- -- -- 53.7 

. 9 3. 1 -- -- -- 74.0 

1.4 28.4 -- -- -- 20.5 

1.7 19.0 -- -- -- 40.0 

. 8 8.3 -- -- -- 62.6 

2.0 31. 6 2.3 1.11 5. 76 13.0 

(. 9) 6.3 -- -- -- 70. 7 

(2. 6) 29. 7 -- -- -- 13. 5 

3.3 29.2 2. 1 . 89 6.86 15. 7 

Cumulative Thickness x 

thickness percent P 2o 5 (feet) (cumulative) 

107.3 1,311.88 

108.4 1,313.42 

110. 1 1, 315.80 

112. 9 1,328.40 

114.9 1,332.00 

118.0 1,349. 98 

120.8 1,362.30 

123. 1 1, 366. 21 

124.3 1, 378. 21 

127.3 1,412.71 

128.4 1,418.98 

131. 1 1,474.06 

134.3 1, 526. 22 

137.0 1, 581. 57 

140.5 1,666.62 

141. 0 1, 673. 52 

143.0 I, 732. 52 

144.0 1, 758.82 

145.3 1, 788. 72 

146.4 1,803. 24 ·~ . 

147.9 1,826.64 

149.5 -· .... 1,850.00 

150.9 1,866.66 

151. 8 1,869.45 

153.2 1, 909. 21 

154.9 1, 941. 51 

155.7 11 948. 15 

157.7 2,011.35 

~ 

~ 

~ 

-- -- -- --

161. 0 2,107.71 
t'-' 

w 

P-15 Phosphate rock------------------------- 4515-RGW 2.8 31. 5 1.7 I . 80 7.06 1 o. 1 163.8 

P-14 Phosphate rock------------------------- 4516-RGW 1.6 32.5 2.0 . 83 7.84 6.7 165.4 

P-13 Mudstone, phosphatic ------------------- 4517-RGW . 7 14. 1 8.2 3.01 8. 18 44. 1 166. 1 

P-12 Phosphate rock------------------------- 4518-RGW . 8 31. 6 1.8 1. 10 6.82 9.6 166.9 

P-11 Phosphate rock, argillaceous ------------ 4519-RGW . 9 24.6 4.8 2.26 6.80 23.4 167.8 

P-10 Phosphate rock------------------------- 4520-RGW 2.0 35.6 .94 .40 6.20 1.5 169.8 

P- 9 Phosphate rock------------------------- 4501-RGW 2.0 35.3 . 77 .37 6.94 1.0 171. 8 

P- 8 Phosphate rock-- ----------------------- 4502-RGW 1.0 31. 6 1.3 . 58 8.60 5.9 172.8 

P- 7 Phosphate rock------------------------- 4503-RGW 1.2 33.6 . 74 .44 6.50 3.0 174.0 

P- 6 Phosphate rock ------------------------- 4504-RGW . 9 31. 7 1.1 . 68 7.48 5.6 174.9 

P- 5 Phosphate rock------------------------- 4505-RGW . 8 32. 7 1.1 .46 5.68 7.2 175.7 

P- 4 Mudstone ------------------------------ 4506-RGW 1.9 2.8 -- -- -- 65.2 177.6 

P- 3 Carbonate rock, argillaceous ------------ 4507-RGW 2. 7 . 3 -- -- _.,. 33.9 180.3 

P- 2 Mudstone, carbonatic ------------------- 4508-RGW 2.0 1.1 -- -- -- 63.8 182.3 

P- 1 Phosphate rock------------------------- 4509-RGW . 5 34.4 -- -- -- 5.0 182.8 

Wells formation- top bed only 

Cw-1 I Carbonate rock -------------------------1 -- I 1. 1 I O. 8 I -- I -- J -- --1 3. 6 I 1. 1 I 

2~ 195.91 

2, 247. 91 

2, 257. 78 

2, 283. 06 

2,305.20 

2,376.40 

2,447.00 

2,478.60 

2,518.92 

2, 54 7. 45 

2, 573. 61 

2, 578. 93 

2, 579. 74 

2, 581. 94 

2, 599. 14 
1:\:) 

~ 

Georgetown Canyon, Idaho, lot 1320 

Portion of the phosphatic shale member of the Phosphoria formation pampled from diamond drill. hole on east limb of the Georgetown 

syncline in Georgetown Canyon, NEiNWi sec. 30, T. 10 S., R. 45 E .• Bear Lake County, Idaho. Beds strikeS. 10• W. and dip 

10• W. Hole drilled in the summer of 1949 by Central Farmers' Fertilizer Company. Drill cores described by D. F. Davidson 

in September 1949. Samples analyzed by U. S. Bureau of Mines laboratory, Albany, Oreg. 

Chemical analyses Cumulative Thickness x Bed Sample Thickness (percent) thickness percent P 2 Rock descrip~ion 0 no. (feet) P205 I Acid (feet) (cumulativef no. 

insoluble 

Phosphatic shale member of Phosphoria formation 

P-15 Mudstone ~------------------------------ ·---4616-DFD 2.0 4.0 68.9 2.0 8.00 

P-14 Mudstone, phosphatic, carbonatic --------- 4617-DFD . 6 9.5 46.1 2.6 13.70 

P-13 Mudstone, carbonatic -------------------- 4618-DFD 1.3 5. 1 55.5 3.9 20.33 

P-12 Carbonate rock, argillaceous ------------- 4619-DFD 1.2 . 9 32.9 5. 1 21.41 

P-11 Mudstone, phosphatic, carbonatic ---------. 4620-DFD 1.3 8.9 45.3 6.4 32.98 

P-10 Mudstone, carbonatic ____________ .:_ _______ 4621-DFD 2.5 z.s 57. 1 8.9 39.23 

P- 9 Mudstone ------------------------------- 46.22-DFD 2.5 2.5 66.0 11.4 45.48 

P- 8 Carbonate rock, argillaceous ------------- 4623-DFD 5.5 1.9 29.0 16.9 55.93 

P- 7 Carbonate rock, argillaceous------------- 4624-DFD 3.5 • 2 17.9 20.4 56.63 

P- 6 Carbonate rock, argillaceous ------------- 4625-DFD • 7 . 3 29.9 21. 1 56.84 

P- 5 Carbonate rock, argillaceous------------- 4626-DFD 3.0 • 2 30.4 24. 1 57.44 

P- 4 Mudstone, carbonatic -------------------- 4627-DFD 5.0 1.4 62.0 29. 1· 64.44 

P- 3 Carbonate rock, argillaceous ------------- 4628-DFD 5.0 7. 1 20.7 34.1 99.94 

P- 2 Muds tone ------------------------------- 4629-DFD 2.5 22.4 27.3 · 36.6 155.94 

P- 1 Mudstone --------------------:...---------- 4630-DFD 2.0 17. 5 31.8 38.6 190.94 - -------- - -----------
!:\.:) 

01 

Dingle, Idaho, lot 1293 

Phosphatic shale member of the Phosphoria formation sampled in bulldozer trench on the east limb of the Hot Springs anticline, SEt sec. 36, T. 14 S., 

R. 44 E., Bear Lake County, Idaho. Beds strike N. 10• W. and dip 6o• W. Section measured by M. A. Warner, R. A. Smart, R. G. Waring, and 

R. P. Sheldon and sampled by Warner, Smart, and Waring in July 1949. Samples analyzed for P 2o 5 and acid insoluble by Uo S. Bureau of Mines 

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

Bed Sample Thickness Chemical analyses (percent) 

Rock description no. no. (feet) p 0 I Al 0 ~ F o3J Loss on I Acid 2 5 2 3 e2 3 _!gnition insoluble -

Rex chert member of Phosphoria formation- basal beds only 

R- 21 Chert ---:--.--·--------------------------- -- Fault brecc1a --------.... ------------------

R- 1 Chert, phosphatic -----------------------

P-84 Mudstone, phosphatic--------------------

P-83 Mudstone-------------------------------

P-82 Mudstone, carboQ.atic -------------------- P-81 Mudstone, carbonatic -------------------- P-80 Mudstone, carbonatic --------------------

P-79 Carbonate rock, argillaceous-------------

P-78 Mudstone, carbonatic -------------------- P-77 Mudstone, carbonatic -------------------- P-76 Mudstone, carbonatic -------------------- P-75 Mudstone-------------------------------

P-74 Mudstone-------------------------------

P-73 Mudstone-------------------------------

P-72 Phosphate rock--------------------------

P-71 Mudstone, phosphatic, phosphate rock, 

and ·mudstone--------------------------

P-70 Phosphate rock--------------------------

P-69 Phosphate rock, argillaceous-------------

P-68 Phosphate rock-----------------~--------

Bed P-68 is slumped. 

P-67 Phosphate rock, argillaceous-------------

P-66 Phosphate rock--------------------------

P-65 Phosphate rock, argillaceo1:1s ------------- P-64 Phosphate rock-------------~------------

P-64 Phosphate rock--------------------------

P-63 Phosphate rock--------------------------

P-62 Phosphate rock-------------------~------

4074-MAW 

4073-MAW 

4072-MAW 

1.3 

{. 3) 

1.7 11.6 

Phosphatic shale member of Phosphoria formation 

4071-MAW 0.5 11. 2 -- -- 4070-MAW 1.1 1.5 -- -- 4069-MAW 1.5 .6 -- -- 4068-MAW 2. 7 . 6 -- -- 4067-MAW 1. 8 . 5 -- --

4066-MAW • 7 . 8 -- -- 4065-MAW 1.1 2.5 -- -- 4064-MAW 1.2 2. 4 -- -- 4063-MAW 1.2 4.9 -- -- 4062-MAW 1.5 2. 6 -- -- 4061-MAW 1.8 . 4 -- -- 4060-MAW 1.2 4.5 -- -- 4059-MAW 1.4 36.3 0.77 0.22 

4058-MAW 2.3 14.6 7.0 1. 79 

4057-MAW 1.2 34.7 . 98 . 31 

4056-MAW . 3 20.5 6.8 1. 84 

4055-MAW .4 35.6 .92 . 21 

4054-MAW . 9 21. 0 5.8 1. 61 

4053-MAW . 6 36.2 . 74 • 30 

4052-MAW • 6 22.9 4.6 1. 08 

4051-MAW 1.2 38. 1 . 56 . 27 

4051-MAW 1.2 38. 1 • 56 .27 

4050-MAW . 8 3~. 9 1.1 .34 

4034- RAS . 9 36.8 . 94 .34 

53.8 

-- 42.8 

-- 66.7 

-- 56.8 

-- 62.5 

-- 60.3 

-- 25.0 

-- 51. 7 

-- 61. 0 

-- 53. 7 

-- 68.0 

-- 68.5 

-- 65.2 

2. 78 4.7 

4.52 49.3 

2.56 9.5 

4.64 34.0 

2.64 8.0 

. 4.78 34.8 

2. 86 6. 1 

5.30 30.2 

3.32 1.8 

3.32 1.8 

3.34 3. 0 

2.40 4.3 

Cumulative Thickness x 

thickness percent P 2o 5 {feet) {cumulative) 

1.3 

3.0 

0.5 5.60 

1. 6 7.25 

3. 1 8. 15 

5.8 9.77 

7. 6 10.67 

8.3 11. 23 

9.4 13.98 

10.6 16.86 

11.8 22.74 

13.3 26.64 

15. 1 27.36 

16. 3 32.76 

17. 7 83.58 

20.0 117.16 

21. 2 158.80 

21,. 5 164.95 

21. 9 179.19 

22.8 198.09 

23.4 219.81 

24.0 233.55 

25.2 279.27 

25.2 279.27 

26.0 308.79 

26.9 341. 91 
C\:) 

0:> 

Bed 

no. 

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 

P-36 

P-35 

P-34 

P-33 

P-32 

Sample Rock description no. 

Phosphate rock, argillaceous------------- 4033- RAS 

Phosphate rock, argillaceous------------- 4032- RAS 

Mudstone, phosphatic-------------------- 4031- RAS 

Phosphate rock ------------------------- 4030- RAS 

Phosphate rock ------------------------- 4029- RAS 

Phosphate rock ------------------------- 4028- RAS 

Mudstone, phosphatic-------------------- 4027- RAS 

Mudstone------------------------------- 4026- RAS 

Mudstone, phosphatic;:-------------------- 4025- RAS 

Mudstone and phosphate rock------------- 4043- RGW 

Mudstone and chert---------------------- 4042- RGW 

Bed P-51 is slumped. 

Mudstone, carbona tic------------:--------- 4041- RPS 

Phosphate rock, argillaceous------------- 4040- RPS 

Mudstone------------------------------- 4039- RPS 

Phosphate rock, argillaceous and 

mudstone ------------------------------ 4038- RPS 

Mudstone------------------------------- 4037- RPS 

Mudstone and phosphatic mudstone ------- 4036- RPS 

Mudstone, phosphatic-------------------- .4035- RPS 

Beds P-44 and P-45 are highly crumpled; 

Mudstone, contains carbonate rock and 

chert lenses--------------------------- 4049-MAW 

Mudstone------------------------------- 4048-MAW 

Mudstone---------------------------~--- 4047-MAW 

Mudstone, phosphatic-------------------- 4046-MAW 

Mudstone------------------------------- 4045-MAW 

Mudstone------------------------------- 4000~AW 

Mudstone, phosphatic-------------------- 3999 MAW 

Mudstone, phosphatic-------------------- 3998-MAW 

Carbonate rock ------------------------- 3997-MAW 

Mudstone, phosphatic-------------------- 3996-MAW 

Mudstone, phosphatic-------------------- 3995-MAW 

Phosphate rock, argillaceous------------- 3994-MAW 

Dingle-Continued 

Thickness Chemical analyses (percent) Cumulative Thickness x 

Loss on Acid thickness percent P 20 (feet) P2o5 Al2o 3 Fe2o 3 ignition insoluble (feet) (cumulativef 

1.4 24.3 4.5 0.93 4. 18 28.7 28.3 375.93 

. 7 29.4 3.5 l. 19 4.58 16.3 29.0 396.51 

1.0 15. 6 6.5 1. 98 7.82 39.3 30.0 412. 11 

. 5 34. 1 1.9 . 61 2.94 8. 7 30.5 429. 16 

1.1 37.8 . 86 .33 2.62 2. 8 31. 6 470. 74 

1. 6 35.6 1. 4 . 57 2.94 6. 2 33.2 527.70 

1.5 10.8 -- -- -- 58.8 34.7 543.90 

1.6 5.3 -- -- -- 69.2 36.3 552.38 

1.9 13.8 -- -- -- 47.3 38.2 578.60 

2.0 4.5 -- -- -- 67.5 40.2 587.60 

2.0 5.4 -- -- -- 63.0 42.2 598.40 

1.2 . 8 -- -- -- 48.4 43.4 599.36 

1.8 19.3 -- -- -- 40.9 45.2 634. 10 

1.5 1.1 -- -- -- 83.8 46.7 635.75 

1.6 18.3 -- -- -- 35.8 48.3 665.03 

. 6 5.4 -- -- -- 65.8 48.9 668.27 

2.0 10. 0 -- -- -- 49.7 50.9 688.27 

3.2 1 o. 3 -- -- -- 34.3 54. 1 721. 23 

2.4 . 6 -- -- -- 12.3 56.5 722.67 

. 7 3. 2 -- -- -- 81.0 57.2 724. 91 

2.5 2.0 -- -- -- 75.3 59. 7 729.91 

1.2 9.5 -- -- -- 56.7 60.9 741.31 

1.7 1.6 -- -- ·-- 77.2 62.6 744.03 

3.5 3.8 -- -- -- 72.6 66. 1 757.33 

1.7 10. 2 -- -- -- 49.3 67.8 774.67 

2.0 10. 1 -- -- -- 51.3 69.8 794.87 

1.1 1.0 -- -- -- 15. 7 70.9 795. 97 

2.0 12. 8 -- -- -- 37.7 72.9 821. 57 

1.5 9. 7 -- -- -- 47.8 74.4 836. 12 

1.5 16.6 -- -- -- 34.6 75.9 861. 02 
M 

--'1 

P-31 ~udstone------------------------------- 3993-~AW 1.0 6.8 -- -- -- 65.2 76.9 867.82 

P-30 ~udstone, phosphatic ------------------- 3992-~AW 2.6 12. 6 -- -- -- 45.1 79.5 900.58 

P-29 ~udstone, phosphatic ---------------~--- 3991-~AW 2,3 12.9 -- -- -- 52. 1 81.8 930.25 

P-28 Phosphate rock ------------------------- 3990-~AW 2.7 26.5 3.9 1. 65 13.34 12.9 84.5 1, 001.80 

P-27 ~udstone, phosphatic ------------------. 3989-~AW 1.1 13. 7 7. 9 3.01 8.86 46.3 85.6 1,016.87 

P-26 Phosphate rock, argillaceous------------- 3988-~Aw· . 8 22.3 5, 7 2.00 9.86 26.7 8(>.4 1, 034. 71 

P-25 Phosphate rock, argillaceous------------- 3987·-~AW 0 8 18.0 6. 7 2. 81 11.02 34.8 87.2 1, 049. 11 

P-24 Phosphate rock ------------------------- 4024- RAS 1.3 31. 6 2.2 1. 00 7.06 9.0 88,5 1,090.19 

P-23 Phosphate rock------------------------- 4023- RAS . 9 29.6 3.4 1. 52 4.62 16. 5 89.4 1, 116. 83 

P-22 Phosphate ,rock, argillaceous------------- 4022- RAS 2.4 21. 6 4.4 t. 83 5.34 33.0 91. 8 1, 168. 67 

P-21 ~udstone, phosphatic ------------------- 4021- RAS 1.4 16. 2 -- -- -- 45.8 93.2 1, 191.35 

P-20 ~udstone-----------~------------------- 4020- RAS 1.3 7.6 -- -- -- 62.8 94.5 1, 201. 23 

P-19 ~udstone------------------------------- 4019- RAS 2.2 4.2 -- -- -- 70.4- 96~ 7 1,210.47 

P-18 ~udstone, phosphatic ------------------- 4018- RAS . 9 9.9 -- -- -- 58.5 97.6 1,219.38 

P-17 Phosphate rock, argillaceous------------- 4017- RAS 1.9 23.4 3.7 1. 04 5.46 32.5 99.5 1, 263. 84 

P-16 Phosphate rock, argillaceous------------- 4016- RAS 1.5 28.9 3.2 . 60 6.66 17.8 101. 0 1, 307. 19 

P-15 Phosphate rock, argillaceous------------- 4015- RAS 2.4 25. 7 4. 1 . 70 4.30 27.2 103.4 1, 368. 87 

P-14 Phosphate rock, argillaceous------------- 4014- RAS 2.0 24.5 3.9 . 94 5.54 28.3 105.4 1,417.87 

P-13 Phosphate rock, argillaceous------------- 4013- RAS 2.2 18. 3 7.0 1. 91 4.64 42.0 107. 6 1, 458. 13 

P-12 ~udstone------------------------------- 4012- RAS . 9 4.7 10. 0 3.50 3.92 72.5 108.5 1,462.36 

P-11 Phosphate rock, argillaceous------------- 4011- RAS 2.0 26.5 3. 1 1. 48 3.04 26.5 110. 5 1,515.36 

P-10 Phosphate rock, argillaceous------------- 4010- RAS 1.0 22.3 3.6 6.53 3.64 30.7 111. 5 1,537.66 

P- 9 Phosphate rock, argillaceous------------- 4009- RAS 1. 8 27.4 4.3 1. 34 3. 12 23.0 113. 3 1,586.98 

P- 8 Phosphate rock, argillaceous------------- 4008- RAS . 7 22.4 3.6 1. 60 2.66 35.3 114.0 1, 602. 66 

P- 7 Phosphate rock, argillaceous------------- 4007- RAS . 9 25.0 4.7 2.92 3.14 27.2 114.9 1,625.16 

P- 6 Phosphate rock ------------------------- 4006- RAS 2.8 35.5 1.3 .34 3.04 4.5 117. 7 1, 724. 56 

P- 5 Phosphate rock ------------------------- 4005- RAS 1.9 35.6 1.3 . 20 3. 12 4.2 119. 6 1, 792.20 

P- 4 Phosphate rock ------------------------- 4004- RAS 1.8 35.6 1.2 .34 3.48 3.8 121. 4 1, 856. 28 

P- 3 Niudstone------------------------------- 4003- RAS 2.6 2. 5 9.2 2.89 ~-· 28 77. 7 124.0 1,862.78 

P- 2 Niudstone------------------------------- 4002- RAS 1.7 1.2 9.9 3. 12 3.14 79.0 125.7 1,864.82 

P- 1 Phosphate rock-- ----------------------- 4001- RAS • 3 32.3 2.8 1. 94 3.06 10. 5 126.0 1, 874. 51 

Wells formation-top part only 

Cw-1 I Chert and mudst~~---=----~---:=---~---------- I -- I 94.0 nru-~ I -- I -- I -- I -- . I --- 94.0 -, 

Upper part of the phosphatic shale member of the Phosphoria formation measured and sampled in a tunnel near the bulldozer trench. Beds strike N. 15• W. 

and dip ~pproxima~ely 10• W. Section measured and sampled by D. F. Davidson and R. A. Smart in June 1949. 

Rex chert member of Phosphoria formation- basal bed only 

R- 1 I Chert, phosphatic----------------------- I 3901- DFD 1. 1 
Dingle-Continued 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description I I I Loss on I Acid thickness percent P 20 5 no. no. (feet) p 2°5 Al203 Fe203 ignition insoluble (feet) (cumulative) 

Phosphatic shale member of Phosphoria formation 

P-33 Mudstone, phosphatic-------------------- 3902-DFD 0. 5 1 o. 6 -- -- -- 55~0 0.5 5.30 

P-32 Mudstone----------.----':"---------------- 3903-DFD . 9 2.0 -- -- -- 73.9 1.4 7. 10 

P-31 Mudstone------------------------------- 3904-DFD . 7 3. 5 -- -- -- 67.0 2. 1 9.55 

P-30 Mudstone, carbona tic-------------------- 3905-DFD 2.0 . 3 -- -- -- 60.0 4. 1 10. 15 

P-29 Mudstone, carbona tic-------------------- 3906-DFD 3.4 . 5 -- -- -- 51. 0 7.5 11. 85 

-- Mudstone, carbonatic lens in bed P-29----- 3907-DFD -- . 2 -- -- -- 60. 1 -- -- P-28 Mudstone, carbonatic -------------------- 3908-RAS 2. 1 1.5 -- -- -- 61.3 9.6 15.00 

P-27 Carbonate rock, argillaceous------------- 3909- RAS . 7 . 8 -- -- -- 26.7 10. 3 15. 56 

P-26 Mudstone----·-------------------------- 4080- RAS 2.0 6.3 -- -- -- 54.3 12.3 28.16 

P-25 Phosphate rock, argillaceous------------- 4081- RAS . 8 17. 9 -- -- -- 41. 8 13. 1 42.48 

P-24 Mudstone------------------------------- 4082- RAS 1.8 3.4 -- -- -- 69.5 14.9 48.60 

P-23 Mudstone------------------------------- 4083- RAS 2.4 . 5 -- -- -- 73.7 17.3 49.80 

P-22 Phosphate rock -----~------------------- 4084- RAS 1.7 33.8 1.6 0.47 2.56 9.5 19.0 107.26 

P-21 Mudstone and argillaceous phosphate 

rock-----~---------------------------- 4085- RAS . 8 8. 7 9. 1 1. 63 3.86 62.4 19.'8 114.22 

1:\:lP-20 Mudstone------------------------~------ 4086- RAS 1,0 5.0 9.6 1. 69 3.90 72. 7 20.8 119.22 (X) 

P-19 Phosphate rock ------------------------- 4087- RAS .4 35.6 1.5 . 43 2.32 6.4 21.2 133.46 

P-18 Phosphate rock and phosphatic muds tone--- 4088- RAS 1.0 23.5 7.0 1. 22 3.80 30.3 22.2 156.96 

P-17 Phosphate rock ------------------------- 4089- RAS 1.1 34.4 1.3 . 34 1. 96 9.4 23.3 194.80 

P-16 Phosphate rock ------------------------- 4090- RAS . 7 33.3 2.8 . 67 2.76 11. 1 24.0 218.11 

P-15 Phosphate rock, argillaceous and 

phosphate rock ------------------------ 4091- RAS 1.0 25.8 4.8 1. 74 6.40 22.7 25.0 243.91 

P-14 Phosphate rock ----------~-------------- 4092- RAS . 9 35. 5 1.1 . 64 5.28 4.3 25.9 275.86 

P-13 Mudstone, phosphatic and phosphate rock-- 4093- RAS . 8 26.6 4. 1 1. 88 6.62 20.5 26.7 297. 14 

P-12 Phosphate rock ------------------------- 4094- RAS 1.9 36.9 . 73 .38 5.66 1.7 28.6 367.25 

P-11 Phosphate rock ------------------------- 4095- RAS 2. 1 35.3 1.2 . 84 6.08 3.4 30.7 441.38 

P-10 Phosphate rock, argillaceous------------- 4096- RAS 1.5 23.8 5.8 2.43 7.88 25.0 32.2 477.08 

P- 9 Phosphate rock ------------------------- 4097- RAS 1.9 36.9 1.4 . 61 3. 14 2. 7 34. 1 547. 19 

P- 8 Phosphate rock ------------------------- 4098- RAS 1·. 0 35.7 1.4 .71 3.94 3. 7 35. 1 582.89 

P- 7 Phosphate rock, argillaceous------------- 4099- RAS 1.6 24.4 4.0 1. 77 11. 62 19. 5 36.7 621. 93 

P- 6 Mudstone, phosphatic-------------------- 5000- RAS 1.2 11. 7 -- -- -- 52.0 37.9 635.97 

P- 5 Mudstone------------------------------- 5001-RAS 1.5 5.4 -- -- -- 66. 1 39.4 644.07 

P- 4 Mudstone--··---------------------------- 5002- RAS 2.6 1.7 -- -- -- 80,3 42.0 648.49 

P- 3 Mudstone------------------------------- 5003- RAS 2.0 4.9 -- -- -- 71.8 44.0 658.29 

P- 2 Phosphate rock ------------------------- 5004- RAS . 4 28.6 -- -- -- 13.4 44.4 669.73 

P- 1 Mudstone------------------------------- 5005- RAS . 5 5. 1 -- -- -- 56.0 44.9 672.28 
1:\.:) 

(0 

Hot Springs, Idaho, lot 1317 

Portion of the phosphatic shale member of the Phosphoria formation sampled on overturned east limb of Hot Springs anticline in the Hot Springs crosscut. 

sec. 13, T. 15 S .• R. 44 E .• Bear Lake County, Idaho. Beds strike N. 24• W. and dip 43• W. Section measured by R. G. Waring, J.D. Weiser, and 

H. W. Peirce and sampled by Waring and Peirce in September 1949. Samples analyzed for P 2o5 and acid insoluble by U. S. Bureau of Mines 

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

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description I I I Loss on I Acid thickness percent P 2o no. no. (feet) 5 P205 Al203 Fe203 ignition insoluble (feet) (cumulative) 

-~ ----

Upper portion of phosphatic shale member of Phosphoria formation 

Strata between bed P-36 and Rex chert 

member not measured because of 

faulting and crumpling. 

P-36 Mudstone------------------------------- 4615- JDW 1. 3 2.3 -- -- -- 67.2 1.3 2.99 

P-35 Carbonate rock ------------------------- 4614- JDW 5.0 .4 -- -- -- 16. 6 6.3 4.99 

P-34 Phosphate rock. argillaceous------------- 4613- JDW . 4 24.6 -- -- -- 21. 1 6.7 14.83 

P-33 ·Mudstone------------------------------- 4612- JDW 1. 3 3. 2 -- -- -- 65.9 8.0 18.99 

P-32 Mudstone------------~------------------ 4611-JDW 3.0 l.O -- -- -·- 72.8 11. 0 21.99 

P-31 Phosphate rock---·----------------------- 4610- JDW 2.0 34.3 0. 56 0.39 6. 17 2. 4 13.0 90.59 

P-30 Mudstone and carbonate rock------------- 4609- JDW 2.0 4. 1 4.96 l. 75 21.63 36.4 15. 0 98.79 

P-29 Phosphate rock-------------------------- 4608- JDW . 5 30.0 . 90 . 61 9.48 4.9 15. 5 113.79 

P-28 Carbonate rock, argillaceous------------- 4607- JDW 1.3 5. 5 4.72 1. 86 23.15 30.0 16. 8 120.94 

P-27 Phosphate rock-------------------------- 4606- JDW . 8 31. 2 . 70 . 36 6.58 3.6 17. 6 145.90 

P-26 Phosphate rock-------------------------- 4605-HWP 1.3 31. 0 1. 62 . 84 7.50 7. 9 18.9 186.20 

P-25 Phosphate rock. argillaceous------------- 4604-HWP . 8 22.8 4.16 1. 75 7.55 26.0 19. 7 204.44 

P-24 Phosphate rock------~------------------- 4603-HWP . 8 31. 7 1. 27 . 63 7. 01 7. 8 20.5 229.80 

P-23 Phosphate rock, argillaceous------------- 4602-HWP . 75 19. 5 3.84 1. 75 12.85 24.6 21. 25 244.43 

P-22 Phosphate rock ------------------------- 4601-HWP . 8 33.8 1. 00 . 63 9.38 3.6 22.05 271.47 

P-21 Phosphate rock, argillaceous------------- 4600-HWP . 8 24. 1 2.78 1. 26 11.42 16.9 22.85 290.75 

P-20 Phosphate rock, argillaceous------------- 4599-HWP . 7 24.4 2.60 1. 12 13.30 15. 6 23.55 307.83 

P-19 Phosphate rock, argillaceous------------- 4598-HWP 1.4 22.4 4.60 1. 80 11.43 27. 1 24.95 339.19 

P-18 Phosphate rock------------------------~- 4597-HWP . 8 32.4 . 62 .46 8.83 2.6 25.75 365.11 

P-17 Phosphate rock-------------------------- 4596-HWP 2. 1 25.4 1. 10 .48 9.83 4.3 27.85 418.45 

P-16 Phosphate rock-------------------------- 4595-HWP 1.6 32.0 2. 19 1.06 15.73 10.6 29.45 469.65 

P-15 Phosphate rock-------------------------- 4594-HWP . 9 30.2 1. 21 . 56 14.32 5.0 30.35 496.83 

P-14 Phosphate rock, argillaceous------------- 4593-HWP 1.9 28. 1 3. 16 1. 36 14. 16 17.9 32.25 550.22 

P-13 Phosphate rock, argillaceous------------- 4592-HWP 1. 5. 18. 6 -- -- -- 19. 9 33. 75 578.12 

P-12 Phosphate rock, argillaceous------------- 4591-HWP 2. 7 15. 7 -- -- -- 37. 7 36.45 ·620.51 

P-ll Mudstone, carbonatic -------------------- 4590-HWP 2.7 5. 7 -- -- -- 40.2 39. 15 635.90 

P-10 Phosphate rock, argillaceous------------- 4589-HWP 16. 7 _ .. -- -- 35.0 40,55 659.28 1.~ -p- '1 . .t'fiospnate rock, argillaceous------------- 4-58-8-=HW-P .·o f-+6-;-5- 1--- - __ .,._ - - -- - -J5.4 41. 15 669.18 
w 

0 

Bed 

no. 

P-8 

P-7 

P-6 

P-5 

P-~ 

P-3 

P-2 

P-1 

Rock description 

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

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

Mudstone----------------------------·---- Phosphate rock, argillaceous--------------

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

Carbonate rock -------------------------- Mudstone, phosphatic---------------------

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

A fault at base of bed P-1 causes omission 

of an unknown thickness of strata. 

Sample 

no. 

4587-HWP 

4586-HWP 

4585-HWP 

4584-HWP 

4583-HWP 

4582-HWP 

4581-HWP 

4580-HWP 

Hot Springs-Continued 

Thickness Chemical analyses (percent) Cumulative Thickness x 

(feet) P205 Al2o3 Fe2o3 

Loss on Acid thickness percent P 20 

ignition insoluble (feet) (cumulativef 

2. 2 12.9 -- -- -- 42.6 43.35 697.56 

1.5 13. 0 -- -- -- 47.6 44.85 717.06 

1.4 1.7 -- -- -- 72.0 46.25 719.44 

. 7 20.7 -- -- -- 32.5 46.95 733.93 

2.3 . 11. 5 -- -- -- 51.8 49.25 760.38 

1.3 1.3 -- -- -- 13. 8 50.55 762.07 

2.2 27.0 -- -- -- 26.4 52.75 821.46 

1.2 16.9 -- -- -- 31.6 53.95 841.74 

INT.-DUP. SEC . , WASH .• D.C.50'73