GEOLOGICAL SURVEY CIRCULAR 262 

STRATIGRAPHIC SECTIONS OF THE 

PHOSPHORIA FORMATION IN 

IDAHO, 1947-48, PART 3 

"' 

UNITED STATES DEPARTMENT OF TH~ INTERIOR 

Douglas McKay, Secretary 

GEOLOGICAL SURVEY 

W. E. Wrather, Director 

GEOLOGICAL SURVEY CIRCULAR .. 262 

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION 

IN IDAHO, 1947--48,PART 3 

By F. W~ O'Malley, D. F. Davidson, R A Hoppin,and R. P. Sheldon 

This report concerns work done partly on behalf of the 

U. S. Atomic Energy Commission 

IQld is published with the permission of the Commission. 

Washington, D. C ... 1963 

Free on application to the Geological Survey, Washi~ 26, D. C. 

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION 

IN IDAHO, 1947-48;J PART 3 

By F. W. O'Maller, D. F. Davidson, R. A Hoppin, and R. P. Sheldon 

CONTENTS 

Introduction ....................... ' . 

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

Stratigraphy of the Phosphoria 

formation in southeastern Idaho .... 

Stratigraphic sections ...•........... 

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

Tables of stratigraphic sections 

and analyses 

Fort Hall Indian Reservation, 

Simplot Fertilizer 

Lot no.. Page 

1 

1 

4 

4 

4 

Company mine.. . . . . . . . . . . . . . 1269 5 

Lot no. Page 

Tables of stratigraphic sections 

and analyses-Continued 

Woodall Creek. . . . . . . . . . . . . . . . . 1262 

Blackfoot Narrows . . . . . . . . . . . . . 1261 

North Dry Valley . . . . . . . . . . . . . . 1259 

Kendall Canyon ........ ~....... 1258 

Slug Creek Valley. . . . .. . . . . . . . . 1278 

West Georgetown Canyon ....... 1264 

East Georgetown Canyon. . . . . . . . 1267 

Paris Canyon . . . . . . . . . . . . . . . . . 1266 

Bloomington Canyon. . . . . . . . . . . . 1272 

9 

13 

17 

20 

24 

27 

30 

34 

38 

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 (lot no. 1206).................... 3 

INTRODUCTION 

The U. S. Geological Survey has measured and 

sampled the Phosphoria formation at many localities 

in Idaho and oth~r 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 p;reliminary reports 

as they_ are assembled. This report, which contains 

abstracts of many of the sections in southeastern Idahu 

(fig. 1), ~is one of this series and is the third report 

of data gathered in Idaho during 1947 and 1948. The 

fi~ld and laboratory procedures adopted in these 

investigations are described rather fully in a companion 

report (McKelvey and others, 1953). 

Many people have taken part in this investigation, 

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

D. A. Bostwick, R. M. Camppell, R. A. Gulbrandsen, 

R. A. Harris, R. L .. Parker, R. A. Smart, J. E. Smedley, 

R. H. Thurston, and R. G. Waring participated in 

the description of strata and the collection of sarr,ples 

referred to in this report. D. B. Dimick, Jack George, 

W. S. Hunziker, J. E. Jones, H. A. Larsen, and 

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 analysis was done in Denver, Colo., under 

the direction of W. P. Huleatt. 

All the P zO 5, F, and acid-insoluble analyses were 

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

Northwest Electrodeveloprr,ent Laboratory, Albany, Oreg., 

1 

under the direction of S. M. Shelton and M. L. Wright. 

The Al 20 3 , FezOa, and loss-on-ignition analyses 

were made in the Trace Elements Section laboratory 

of the Survey in Washington, D. C., under the direction of J. C. Rabbitt by chemists I. Barlow, 

A. B. Caemmerer, F. Cuttitta, J. L. Greene, 

N. Guttag, C. Hoy, E. H. Pendergrass, J. J. Rowe, 

ancl A. L. White. 

Compilation of the data has been largely by 

R. P. Sheldon and F. D. Frieske und,~r the supervision 

of R. W. Swanson. Organization of be tabular data 

has been largely by Anita Cozzetto. 

ACKNOWLEDGMENTS 

Special thanks are due W. W. Rubey, 

J. Steele Williams, and A. E. We~ssenborn who 

have given much advice in plannin~;- and organizing 

the field program. 

The cost of both th3 field and laboratory investigations has been partly borne by i:he Division of Raw 

Materials of the Atomic Energy (.;ommission. 

It is a pleasure to acknowledge the fine cooperation extended to the field party by the local residents, 

property owners, and operating phosphate companies, 

who furnished information and services and gave access 

to property. A. J. Winters, Superintendent of the 

Montpelier schools; E. M. Norris, C. T. Russell, 

and L. E. Traeger of the AnacondaCopperMiningCo.; 
.~ 

.·· 

0" 

··· .. ... .. 

INDEX MAP 

EXPLANATION 

·····--- Outcrop of Phosphoria formation, 

dotted where questionable 

o I 269 

Location and lot'"Ii'i:imber of sample 

locality included in this report 

0 1243 

Location and lot number of sample 

locality to be included in other reports 

1304 ' 

ll2' \ 

' 

-~~ 

~ 

JIJO 

~· 

I 

I 

I 

I I a, 1202 

I~~~~~ 

I 

liiO:::&:JI!iiC!illiil::io&!iiiiiiiii!i!iiiiiiiii!ii3!!1:======::::&!iiiiiiiii!i!iiiiiiiii!i!iiiiiiiii!i!!!C::::::::::;==;340 Miles 

•2• - • ___ ·_·._..:_...~-----LD_A!!.Q ______ ._. _ _..._.ll _____ --------: •2 

u3o UTAH u2o "'o Recompiled and modified from Clabaugh, 1946 

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

2 
FEET 

30 

50 

10 

200 

250 

300 

350 

400 

PIICI.T 'z 0s 

20 10 0 LITHOI.CIY 

THICK• AYIRAtl 

NI!S$ Pj 0e 1• DltCRIPTIOft 

IN 'lET PERCI.T Phosphoria formation 

Ru eben: member (top I"Ot exposed) 

46 Chen:: hard, black, thin-bedded 

32 Mudstone: hard, black, thin-bedded 

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

82 

Chett and limestone: 80 percent hard, black, thin-bedded cbett; 20 percent bard, 

dark-gray, massive limestone 

Phosphatic shale member 

mediwn•hard, light browoish-py; coataiDs 

OD 

Phosphate rock: oolitic, hard, black, thin-bedded. Lower 0.5 foot coataios whit~ 

(tabular) fossil fragments 

Wells formation 

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

3 
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. 

STRATIGRAPHY OF THE PHOSPHORIA FORMATION 

IN SOUTHEASTERN IDAHO 

At its type locality in southeastern Idaho 

{Richards and Mansfield, 1912), 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; in 

most of southeastern Idaho and western Wyoming, 

however, another member, a thin-bedded cherty 

mudstone 15 to 75 feet thick, overlies the Rex 

chert member, though it is not well defined at 

the type locality. 

The Phosphoria formation overlies the Wells 

formation of Pennsylvaniqn age and underlies the 

Dinwoody formation of Triassic age. The upper 

50 to 75 feet of the Wells formation consists of 

gray fossiliferous cherty limestone that contains 

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 focusea. 

It consists of many thin layers, some of which persist 

4 

over the whole area. They may be grouped into several 

broad units, as yet Uilllq.ffied, as shown on figure 2. 

STRATIGRAPHIC SECTIONS 

Abstracts of stratigraphic sections measured 

at 10 localities, and the available analytical data, are 

presented in the following pages. Their locations, as 

well as the locations of the sections reported (McKelvey, 

and others, 1953a, b) previously and of others to be 

reported later, are shown on figure 1. 

REFERENCES 

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

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

Survey, Strategic Minerals Investigations 

Preliminary Map 3-198. 

McKelvey, V. E., 1949, Geologicalstudiesofthewestern 

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

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

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

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

of the Phosphoria formation in Idaho, 1947-48, 

part I: U. S. Geol. Survey Circ. 208. 

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

_a_n_d,_..,C,....ampbell, R. M., 1953b, Stratigraphic 

sections of Phosphoria formation in Idaho, 1947-48, 

part II: U. S. Geol. Survey Circ .. 261. 

Richards, 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. 
01 

FORT HALL INDIAN RESERVATION, SIMPLOT FERTILIZER COMPANY MINE, IDAHO. LOT NO. 1269. 

Lower part of phosphatic shale member of Phosphoria formation, weathered and unweathered sections, sampled in pits at Sitnplot mine, Fort 

Hall Indian Reservation, sec. 22, T. 4 S., R. 37 E., Bingham County, Idaho. Section measured by F. W. 0 1 Malley and R. A. Harris and sampled by 

R. A. Smart in October 1948. Samples analyzed for P 2o5, fluorine, and acid insoluble by U.S. Bureau of Mines Laboratory, Albany, Oregon, and for 

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

Bed Sample Thichness Chemical analyses (percent Cumulative Thickness x 

Rock description P2051 Al2031 Fe2031 

I Losson Acid thickness percent P 20 no. no. (feet) F 5 ignition insoluble (feet) (cumulative) 

Phosphatic shale member of Phosphoria formation 

Hard, unaltered section 

Pit C 

P-50 Mudstone 2721-WOM 1.5 1. 5 -- -- -- -- 83.2 

I 

1. 5 

I 

2.25 

P-49 Phosphate rock 2720-WOM 0.8 30.8 -- -- -- -- 13. 5 2.3 26.89 

P-48 Mudstone 2718-WOM 10.0 0.6 -- -- -- -- 85.5 12. 3 32.89 

P-47 Mudstone and phosphatic 

mudstone 2717-WOM 0.6 4.3 -- -- -- -- 71.6 12.9 35.47 

P-46 Mudstone 2716-WOM 1.8 5. 1 -- -- -- -- 75. 1 14. 7 44.65 

P-45 Mudstone, phosphatic 2715-WOM 0.9 16. 7 -- -- -- -- 44.4 15.6 59.68 

P-44 Mudstone, phosphatic 2714-WOM 1.6 7. 9 -- -- -- -- 61.3 17. 2 72.32 

P-43 Phosphate rock, argillaceous 2719-WOM 0.9 19.7 -- -- -- -- 33.0 18. 1 90.05 

P-42 Phosphate rock, argillaceous 2713-WOM 1.1 25.0 -- -- -- -- 21.8 19.2 117. 55 

P-41 Phosphate rock, argillaceous 2712-WOM 0,8 17. 5 -- -- -- -- 43.7 20.0 131. 55 

P-40 Mudstone, phosphatic 2711-WOM 1. 1 16.2 -- -- -- -- 46.8 21. 1 149.37 

P-39 Phosphate rock, argillaceous 2710-WOM 1. 0 17.0 -- -- -- -- 38.8 22. 1 166.37 

P-38 Mudstone, phosphatic 2709-WOM 1.2 15. 7 -- -- -- -- 44.9 23,3 185.21 

P-37 Limestone, argillaceous 2708-WOM 1.6 1.6 -- -- -- -- 23.4 24.9 187.77 

P-36 Mudstone, phosphatic 2706-WOM 3. 0 1. 4 -- -- -- -- 3,4 27.9 191. 97 

Limestone concretion · 2707-WOM ( 1. 2) 14.6 -- -- -- -- 44.8 

P-35 I Phosphate rock, argillaceous, 

calcareous 2705-WOM 4.2 17.9 -- -- -- -- 31.2 I 32. 1 I 26 7. 15 

About 10,0 feet of section not logged and sampled between bottom of pit C section and top of pit B section; rocks in pit Bare stratigraphically 

below those measured in pit c. but exact correlation is not possible. 

Pit B 

P-341 Phosphate rock, argillaceous 2275-WOM 1. 5 24.7 -- -- -- -- 22.8 33.6 304.20 

P-33 Limestone 2274-WOM 1.5 3. 5 -- -- -- -- 4.5 35. 1 309.45 

P-32 Limestone, phosphatic, 

argillaceous 2273-WOM~ 1.7 13.3 -- -- -- -- 25. 1 36.8 332.06 

P-31 I Mudstone, calcareous, phosphatic 2272-WOM 0.4 9. 4 -- -- -- -- 39.7 37.2 335.82 
Bed Sample Thickness Chemical analyses 'percent) Cumulative Thickness x 

Rock description (feet) P205 Al20 3 Fe2o3 F Loss on Acid thickness percent P 2o no. no. 5 ignition insoluble (feet) {cumulative) 

P-30 Phosphate rock, argillaceous 2271-WOM 1.7 21.0 -- -- -- -- 25.7 38.9 371. 52 

P-29 Phosphate rock, argillaceous 2270-WOM 2. 5 23.2 -- -- -- -- 24.7 41.4 429.52 

P-28 Phosphate rock, argillaceous, 

calcareous 2269-WOM 1.0 16.2 -- -- -- -- 36.8 42.4 445.72 

P-27 Mudstone 2160-WOM 1. 2 6.9 -- -- -- -- 58.9 43.6 454.00 

P-26 Phosphate rock, argillaceous 2159·WOM 1.6 15. 2 -- -- -- -- 37.4 45.2 478.32 

P-25 Limestone 2158-WOM 3.4 1. 8 -- -- -- -- 12. 3 48.6 484.44 

P-24 Phosphate rock 2157-WOM 1.0 32.0 -- -- -- -- 9.9 49.6 516.44 

P-23 Phosphate rock 2156-WOM 0.8 28.3 -- -- -- -- 12. 1 50.4 539.08 

P-22 Phosphate rock 2155-WOM 1.7 27.2 -- -- -- -- 12.3 52.1 585.32 

P-21 Mudstone 2154-WOM 0.5 7.8 -- -- -- -- 45.8 52, 6, 589.22 

-- Limestone concretion 2153-WOM ( 1. 1) 1.5 -- -- -- -- 3.3 -- -- P-20 Phosphate rock, argillaceous 2152-WOM 1.6 22.6 -- -- -- -- 28.4 54.2 625.38 

P-19 Limestone 2151-WOM 1.6 3. 1 -- -- -- -- 18.7 55.8 630.34 

P-18 Mudstone, phosphatic 2150-WOM 1.2 14.6 -- -- -- -- 45.3 57.0 647.86 

P-17 Mudstone, phosphatic 2149-WOM 0.4 12. 3 -- -- -- -- 53. 7 57.4 652.78 

<» 

P-16 Phosphate rock 2148-WOM 1.4 33. 1 0.63 0.37 -- 7.32 7. 1 58.8 699.12 

P-15 Phosphate rock, argillaceous 2147-WOM 3.2 20. 1 2.6 1. 1 -- 8.26 33.5 62.0 763.44 

P-14 Phosphate rock, argillaceous 2146-WOM 0.6 23.4 3.2 1.3 -- B. 74 23.3 62.6 777.48 

P-13 Phosphate rock 2145-WOM 0.5 33. 1 0.45 0.36 --. 5.02 5. 8 63.1 794.03 • P-12 Phosphate rock 2144-WOM 0,7 32.4 1. 3 0.67 -- 5.76 7. 7 63.8 816.71 

-- Limestone concretion 2143-WOM (0. 6) 1.3 0.35 0.27 -- 41.52 3. 1 -- -- P-11 Phosphate rock 2142-WOM 1. 7 27.7 1.4 0.66 -- 9. 56 14. 5 65.5 863.80 

P-10 Phosphate rock, argillaceous, 

calcareous, and argillaceous 

phosphate rock 2141-WOM 2.9 21.6 1.7 1.3 -- 11.62 22.0 68.4 926.44 

P- 9 Limestone 2140-WOM 1.0 3. 8 0.95 0.39 -- 37.82 10. 7 69.4 930.24 

P- 8 Phosphate rock 2139-WOM o. 5 28.4 1.2 0.49 2.77 8.92 15. 7 69.9 944.44 

P- 7 Phosphate rock, argillaceous 2138-WOM 1.8 24. 1 2.5 0.99 2.47 9.00 23.3 71.7 987.82 

P- 6 Limestone 2137-WOM 1.7 2. 4 -- -- -- -- 5. 5 73.4 991.90 

P- 5" Limestone, phosphatic 2136-WOM 1.4 10.9 -- -- 1. 14 -- 7. 1 74.8 1,007.16 

P- 4 Phosphate rock 2279-WOM 2.3 34.2 0.41 0.43 3. 53 6.16 4.4 77. 1 1,085.82 

P- 3 Phosphate rock 2276-WOM, 3.3 32.2 0.79 0.63 3.46 6.18 8.9 80.4 1,192.08 

P- 2 Mudstone, phosphatic 2277-WOM 1. 0 11.8 -- -- -- -- 51.7 81.4 1,203.88 

P- 1 Limestone, argillaceous 2276-WOM 2.7 1. 2 -- -- -- -- 43. 1 84. 1 1, 207.12 

Base of phosphatic shale member is not exposed; bed P-1 prpbably lies 3 to 8 feet above base. -
Soft, weathered section 

Pit E 

P-51 Phosphate rock 2704-WOM 1.2 31.3 -- -- -- -- 12. 7 1.2 37.56 

P-50 Phosphate rock, argillaceous 2703-WOM 0.6 26.4 -- -- -- -- 22.0 1. 8 53.40 

P-49 Phosphate rock, argillaceous 2702-WOM 0.7 23.2 -- -- -- -- 31.0 2. 5 69.64 

P-48 Phosphate rock, argillaceous 2701-WOM 0.5 27. 1 -- -- -- -- 22.2 3. 0 83. 19 

P-47 Mudstone, phosphatic 2700-WOM 0.3 7. 9 -- -- -- -- 53.7 3.3 85.56 

P-46 Phosphate rock, argillaceous 2699-WOM o. 6 23.9 -- -- -- -- 26.4 3. 9 99.90 

P-45 Phosphate rock, argillaceous 2698-WOM 1. 0 23.7 -- -- -- -- 27.9 4.9 123.60 

P-44 Phosphate rock, argillaceous 2697-WOM 0.5 19.6 -- -- -- -- 58.7 5.4 133.40 

P-43 Mudstone, phosphatic 2696-WOM 0.7 13. 1 -- -- -- -- 55.8 6. 1 142.57 

P-42 Phosphate rock, argillaceous 2695-WOM 1.1 21.3 -- -- -- -- 36. 1 7. 2 166.00 

P-41 Mudstone, phosphatic 2694-WOM 0.6 17.6 -- -- -- -- 46.2 7. 8 176. 56 

P-40 Phosphate rock, argillaceous 2693-WOM 1.4 17.9 -- -- -- -- 40.6 9.2 201. 62 

P-39 Mudstone, pho~phatic 2692-WOM 1.1 8.6 -- -- -- -- 5"8. 8 10. 3 211.08 

P-38 Phosphate rock, argillaceous 2691-WOM 0.5 25.6 -- -- -- -- 27.2 10. 8 223.88 

P-37 Limestone 2690-WOM 2.8 5. 6 -- -- -- -- 8. 9 13.6 239.56 

P-36 Phosphate rock 2689-WOM 0.5 26.8 -- -- -- -- 18. 7 14. 1 252.96 

P-35 Phosphate rock, argillaceous 2688-WOM 0.6 21.7 -- -- -- -- 33.4 14. 7 265.98 

P-34 Limestone 2687-WOM 1.6 1.7 -- -- -- -- 12.8 16. 3 268. 70 

P-33 Phosphate rock 2686-WOM o. 6 34.3 -- -- -- -- 6. 3 16.9 289.28 

....::l P-32 Phosphate rock 2685-WOM 0.8 30.0 -- -- -- -- 17.9 17. 7 313. 28 

P-31 Phosphate rock 2684-WOM 0.2 29.1 -- -- -- -- 16.5 17.9 319. 10 

P-30 Phosphate rock 2683-WOM o. 3 33.5 -- -- -- -- 6.9 18.2 329.15 

P-29 Phosphate rock, argillaceous 2667-WOM o. 7 25.8 .... -- -- -- 22.8 18.9 34 7. 21 

Pit C north 

Beds P-32 through P-29 were resamp1ed in Pit C north; they are equivalent to beds of the same number in Pit E. 

P-32 Phosphate rock 2682-WOM (0. 7) 34.4 0.87 0.59 -- 3.36 7. 4 

P-31 Phosphate rock 2681-WOM (0. 5) 29.0 1. 9 0.85 -- 4.60 18.2 

P-30 Phosphate rock 2680-WOM (0. 5) 33.9 1.2 0.48 -- 4.32 8. 2 

P-29 Phosphate rock 2679-WOM (0. 7) 28.1 3.3 1.2 -- 5. 78 18.6 

P-28 Phosphate rock 2678-WOM 1. 2 32.9 1. 6 o. 71 -- 4.26 10.0 20. 1 I 386.69 

P-27 Phosphate rock 2677-WOM 0.5 28.5 -- -- . -- -- 19. 8 20.6 400.94 

P-26 Phosphate rock, argillaceous 2676-:-WOM 0.6 25.2 -- -- -- -- 28.9 21.2 416.06 

P-25 Mudstone, phosphatic 2675-WOM 0.4 8. 3 -- -- -- -- 68.9 21. 6 419.38 

P-24 Phosphate rock, argillaceous 2674-WOM 0.6 23. 7 -- -- -- -- 31.7 22.2 433.60 

P-23 Phosphate rock, argillaceous 2673-WOM 0.7 11.9 -- -- -- . -- 41.0 22.9 446.83 

P-ZZ I Phosphate rock, argillaceous 2672-WOM 1. 2 27.4 -- -- -- -- 23.2 24. 1 479. 71 

P-21 Phosphate rock, argillaceous 2671~WOM 1.1 24.3 -- -- -- -- 30.4 25.2 506.44 

P-20 Mudstone, phosphatic 2670-WOM 1.2 8. 8 -- -- -- -- 60.2 26.4 517. 00 
Bed Sample Thickness Chemical analyses (percent Cumulative Thickness x 

Rock description Loss on Acid thickness percent 

P

20 no. no. {feet) Pz05 Al2o3 Fe2o3 F ignition insoluble {feet) {cumulative? 

P-19 Mudstone, phosphatic 2669-WOM 1.9 14.5 -- -- -- -- 52.5 28.3 544.55 

P-18 Phosphate rock, argillaceous 2668-WOM 0.4 23.8 3.3 1. 3 -- 5.48 29.5 28. 7 554.07 

P-17 Phosphate rock 2666-WOM 1.4 34.0 0.74 0.43 -- 5.28 7. 0 30.) 601. 67 

P-16 Phosphate rock, argillaceous 2665-WOM 1.4 21. 7 2.8 1.1 -- 5.72 36.0 31.5 632. 05 

-- Chert concretion 2664-WOM {0. 6) 7. 2 0.92 1.9 -- 2. 70 75.2 75.2 --

P-15 Phosphate rock, argillaceous 2663-WOM 1.3 26.3 3.0 1.1 -- 5.46 24.9 32.8 666.24 

P-14 Phosphate rock 2662-WOM 0.8 31. 7 1.3 0.59 -- 4.56 12. 1 33.6 691. 60 

P-13 Phosphate rock 2661-WOM 1.5 29.4 2.3 0.84 -- 5.84 16.3 35. 1 735. 70 

P-12 Phosphate rock, argillaceous 2660-WOM 0.8 23.2 6.0 1.7 -- 5.30 31.6 35.9 754.26 

P-11 Phosphate rock 2659-WOM 0.7 31. 6 2.2 0.77 -- 4.36 13.4 36.6 776.38 

P-10 Phosphate rock, argillaceous 2658-WOM 2.5 24.4 3.6 1. 1 -- 4.52 29.2 39. 1 837.38 

P- 9 Phosphate rock, argillaceous 2657-WOM 0.4 19.2 6. 1 2. 1 -- 4. 50 38.8 39.5 845.06 

P- 8 Phosphate rock, argillaceous 2656-WOM 0.7 25.3 4.5 2.0 -- 3.88 26.0 40.2 862. 77 

P- 7 Phosphate rock 2655-WOM 2. 4 35. 1 0.61 0.53 -- 4.40 3. 5 42.6 947. 01 

P- 6 Phosphate rock 2654-WOM 3.7 31.9 0.89 0.55 -- 4.84 10. 2 46.3 1, 065. 04 

P- 5 Phosphate rock, argillaceous 2653-WOM 0.8 18.3 -- -- -- -- 38.2 47. 1 1,079.68 

P- 4 Mudstone 2652-WOM 2.5 2.9 -- -- -- -- 78.2 49.6 1,086.93 

P- 3 Phosphate rock 2651-WOM 0.4 30.4 -- -- -- -- 15.9 50.0 1,099.09 

P- 2 Mudstone and chert 2650-WOM 1.7 2.6 -- -- -- -- 83.4 51. 7 1, 103. 51 

P- 1 Mudstone, phosphatic 2280-WOM 0.9 43.9 -- -- -- -- 50.5 52.6 1, 116.02 CX> 
<:("\ 

WOODALL CREEK, IDAHO. LOT NO. 1262. 

Phosphatic shale member of Phosphoria formation sampled in bulldozer trench, NWt sec. 26, T. 7 S., R. 42 E., Caribou County, Idaho, on east 

limb of faulted anticline. Beds strike N. s• W. and dip 35• E. Section measured by V. E. McKelvey, R. A. Gulbrandsen, F. W. 0' Malley, R. L. Parker, 

R. P. Sheldon, and R. G. Waring and sampled by Waring and T. K. Rigby in August 1948. Samples analyzed for P 20 5 and acid insoluble by U. S. Bureau 

of Mines Laboratory, Albany, Oregon, and for other constituents by Trace Elements Section Laboratory, U. S. Geological Survey, Washington, D. C. 

Bed Rock description no. 

R- 2 I Mudstone 

R- 1 Chert 

P-92 Mudstone 

P-91 Mudstone; fos. col. no. 48-JES-205 1 

P-90 Mudstone 

P-89 Mudstone; fos. col. no. 48-JES-204 

P-88 Mudstone, phosphatic; fos. col. no. 48-JES-203 

P-87 Phosphate rock, argillaceous; fos. 

col. no. 48-JES-202 

P-86 Mudstone 

P-85 Phosphate rock 

P-84 Phosphate rock, argillaceous 

\. 

Sample Thickness Chemical analyses (percent) 

no. (feet) I I I Losson I Acid P2°s Al203 Fe203 ignition insoluble 

Rex member of Phosphoria formation- basal beds only 

1177-WOM 

1176-WOM 

Phosphatic shale member of Phosphoria formation 

1175-WOM 1.1 2. 3 -- -- 1174-WOM 1.5 0.6 -- -- 1170-WOM 0.6 0.7 -- -- 1169-WOM 0.9 3. 1 -- -- 1168-WOM 1.5 8. 8 -- --

1167-WOM 0.9 19.5 -- -- 1166-WOM 0.8 5. 0 -- -- 1165-WOM 2.7 31.2 1.8 1.1 

1164-WOM 0.5 24.2 5.3 1.9 

-- 79.5 

-- 81. 5 

-- 79.8 

-- 72.9 

-- 63.2 

-- 41.0 

-- 68.5 

3. 16 13.6 

4.08 25.9 

Cumulative 

thickness 

(feet) 

6. 0 

8. 0 

1.1 

2. 6 

3. 2 

4. 1 

5. 6 

6. 5 

7. 3 

10.0 

10.5 

Thickness x 

percent P 20 

( cumulativef 

4.20 

5.60 

2.53 

3.43 

3.85 

6.64 

19.84 

37.39 

41.39 

125.63 

137.73 

From 1164-WOM to top of section units are weathered, slumped, and poorly exposed making thicknesses measured of questionable value. 

P-83 Phosphate rock, argillaceous 2000-WOM 0.4 21. 1 5. 3 1.8 5.34 34. 1 10.9 146.17 

P-82 Phosphate rock and phosphatic mudstone 1999-WOM 0.5 19. 1 5.7 1.9 5.88 39.0 11.4 155. 72 

P-81 Phosphate rock 1998-WOM 0.6 31. 7 2.8 1.0 6. 10 10.9 12.0 . 174.74 

P-80 Phosphate rock, argillaceous 1997-WOM 1.2 23. 1 4.4 1.5 11.08 24.9 13. 2 202.46 

P-79 Phosphate rock, argillaceous 1996-WOM 3.7 21. 7 5. 3 1.9 13.38 25.8 16.9 282.75 

P-78 Phosphate rock, argillaceous 1995-WOM 1.9 22.8 5.3 2. 1 8.66 27.9 18.8 326.07 

P-77 Phosphate rock, argillaceous 1994-WOM 1.8 21.9 5. 5 2.2 6.30 33.2 20.6 365.49 

P-76 Mudstone 1993-WOM 1.0 7. 1 9.5 3.6 5.64 73.0 21.6 372.59 

P-75 Phosphate rock, argillaceous 1992-WOM 1. 2 21.0 5. 6 2. 5 6.02 35.3 22.8 397.79 

P-74 Phosphate rock, argillaceous 1991-WOM 0.4 27. 1 1.8 1.2 3.44 24.3 23.2 408.63 

P-73 Mudstone, phosphatic; fos. col. no. 48-JES-201 1990-WOM 3. 3 8. 4 -- -- -- 68.2 26.5 436.35 

P-72 Mudstone 1989-WOM 1.9 4.4 -- -- -- 79.0 28.4 444.71 

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. 
1--' 

0 

Bed 

no. 

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 

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 

Rock description ~ 

Phosphate rock, argillaceous; fos. col. 

no. 48-JES-200 

Mudstone 

Mudstone, phosphatic; fos. col. no. 

· 48-JES-199 

Mudstone, phosphatic; fos. col. no. 

48-JES-198 

·Mudstone. phosphatic; fos. col. no. 

48-JES-197 

. Phosphate rock, argillaceous 

Mudstone, phosphatic 

Mudstone 

·Mudstone 

Phosph,ate rock and mudstone 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone 

Mudstone; fos. col. no. 48-JES-196 

Mudstone 

Mudstone; fos. col. no. 48-JES-195 

Phosphate rock, argillaceous 

Mudstone; fos. col. no. 48-JES-194 

Mudstone 

Phosphate rock, argillaceous 

Mudstone, phosphatic 

Phosphate rock 

Mudstone 

Mudstone 

Phosphate rock, argillaceous 

Mudstone; fos. col. no. 48-JES-193 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone, phosphatic and chert 

Mudstone and phosphatic mudstone . 

Mudstone, phosphatic; fos. col. no. 

48-JES-192 

Sample Thickness 

no. {feet) P205 

1988-WOM 1. 3 20.5 

1987-WOM 1.2 4.9 

1986-WOM 1.0 16.4 

1985-WOM 2.5 8. 3 

1984-WOM 1.2 9. 2 

1983-WOM 0.6 22.5 

1982-WOM 0.9 15. 1 

1981-WOM 2.5 7. 2 

1970-WOM 1.1 6. 7 

· 1969-WOM 0.6 22.0 

1968-WOM 1.4 14.7 

1967-WOM. 0.5 22.8 

1966-WOM 1.4 15. 1 

1965-WOM 2.0 3. 6 

2620-WOM 0.7 o. 0 

2619-WOM 3. 3 1.0 

2618-WOM 2.4 5. 7 

2617-WOM 1.6 4.9 

2616-WOM 1. 0 I. 0 

2615-WOM 0.3 28.3 

2614-WOM 2.5 6. 1 

2613-WOM 1.1 5. 5 

2612-WOM 0.6 27.0 

2611-WOM 0.6 10.0 

2610-WOM 0.4 33.5 

2609-WOM 1.5 0.8 

2608-WOM ·o.9 2.4 

2607-WOM 0.8 20.8 

2606-WOM 2.4 5. 5 

2605-WOM 0.8 1.2 

2604-WOM 0.9 6. 7 

2603-WOM 0.6 1.2 

2602-WOM 0.8 3. 1 

2601-WOM 1.1 9. 8 

1190- RPS 1. 5 3. 5 

1189- RPS 1. 7 12.6 

Chemical analyses (percent) Cumulative Thickness x 

Al2o3 Fe2o3 

Loss on ·ada thickness percent P20 

ignition insoluble (feet) (cumulativef 

-- -- -- 42. 1 29.7 471. 36 

-- -- -- 79.3 30.9 477.24 

-- -- -- 49.9 31.9 493.64 

-- -- -- 68. 1 34.4 514.39 

-- -- -- 65.9 35.6 525.43 

-- -- -- 37.1 36.2 538.93 

-- -- -- 50.9 37.1 552.52 

-- -- -- 69.5 39.6 570. 52 

-- -- -- 71. 5 40.7 577.89 

-- -- -- 33.3 41.3 591. 09 

-- -- -- 49. 1 42.7 611.67 

-- -- -- 33.5 43.2 623.07 

-- -- -- 46.8 44.6 644.21 

-- -- -- 79. 1 46.6 651. 41 

-- -- -- 87.6 47.3 651.41 

-- -- -- 86.7 50.6 654. 71 

-- -- -- 71. 1 53.0 668.39 

-- -- -- 76.6 54.6 676.23 

-- -- -- 87.9 55.6 677.23 

-- -- -- 21.7 55.9 685. 72 

-- -- 73.7 58.4 700.97 

-- -- -- 75.0 59.5 707. 02 

-- -- -- 23.5 60. 1 723.22 

-- -- -- 63.7 60.7 729.22 

-- -- -- 10.3 61. 1 742.62 

-- -- -- 88. 1 62.6 743.82 

-- -- -- 85.0 63.5 745. 98 

-- -- -- 33. 1 64.3 762.62 

-- -- -- 74.1 66.7 775.82 

-- -- -- 84.5 67.5 776. 78 

-- -- -- 68.1 68.4 182. 81 

-- -- -- 86.0 69.0 783. 53 

-- -- -- 80.6 69.8 786.01 

-- -- -- 59.0 70.9 796. 79 

-- -- -- 78.1 72.4 802.04 

-- -- -- 52.3 74. 1 823.46 
1-' 

1-' 

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 

P-13 

--

P-12 

P-11 ". 

P-10 · 

P- 9 

P- 8 

p .. 7. 

P- 6 

P- 5 

P- 4 

P- 3 

P- 2 

P- 1 

Mudstone 1188- RPS 0.3 2.9 -- -- -- 76.3 74.4 

Mudstone 1187-WOM 4.2 3. 7 -- -- -- 77.0 78.6 

Mudstone 1186-WOM 0.5 1. 2 -- -- -- 84.0 79. 1 

1186-WOM is interrupted in trench, possibly due to a fault, and next few beds below are weathered and hard to distinguish. 

Mudstone, phosphatic 1199-WOM 1. 0 8. 1 -- -- -- 62.3 

Mudstone, phosphatic 1198-WOM 1.7 9.8 -- -- -- 58.7 

Mudstone 1197-WOM 0.5 3.9 -- -- -- 74.3 

Phosphate rock, argillaceous 1975- RGW 3.0 23.2 -- -- -- 27.2 

Phosphate rock, argillaceous 1974- RGW 1. 7 24.2 -- -- -- 24.6 

Phosphate rock and mudstone 1973-RGW 1.8 18.3 -- -- -- 40.3 

Mudstone, phosphatic 1972-RGW 2.0 11. 1 -- -- -- 51.8 

Chert 1971- RGW 1.4 6. 1 -- -- -- 77.5 

Phosphate rock, argillaceous; fos. col. 

no. 48-JES-191 1196- RPS 1.4 18. 0 -- -- -- 39.0 

Phosphate rock · 1195- RPS 0.4 35.2 1.3 1. 6 3. 60 3. 6 

Phosphate rock 1194- RPS 0.3 33.4 1.4 1.2 4.66 6.4 

Phosphate rock 1193- RPS 1. 6 32.3 1.9 1.0 4.92 9. 1 

Phosphate rock, argillaceous, and 

phosphatic mudstone 1192- RPS 0.5 24.8 4.8 1. 8 4.48 25.7 

Mudstone and phosphatic mudstone 1191- RPS 0.3 14. 1 7. 5 2.2 4. 10 53.8 

Phosphate rock 1185- VEM 1.0 35.6 0.89 o. 59\ 4.08 3. 0 

Phosphate rock 1184- VEM 0.7 28.3 3.8 1.5 4.80 18. 2 

Phosphate rock 1183- VEM 1.7 33.4 1.7 0.80 3.64 8.5 

Phosphate rock 1182- VEM 1.2 31.6 1.8 0.75 4.90 11.3 

Mudstone and argillaceous phosphate 

rock 1181- VEM 0.7 20.3 7. 3 2. 3 2.28 36. 1 

Mudstone and phosphate rock 1173- RAG 1.0 25.6 5.4 2. 2 5.88 21. 5 

Chert lens -- (o. o-o. 25) .... -- -- -- --. Phosphate rock and phosphatic 

mudstone 1172- RAG 1. 05 25.5 . 2. 5 1.3 5.38 24.6 

PhQsphate rock and phosphatic 

mudstone 1171- RAG 1. 38 26.9 4.0 1.4 5. 74 18.9 

Mudstone,. phosphatic 1163- RPS 2.3 10.6 7.6 3.32 7.06 54.6 

Phosphate rock 1162- RPS 1.1 31. 7 2.3 1. 07 5.94 8.3 

Mudstone, phosphatic 1161- RPS 0.9 10.4 5. 8 2.34 5. 58 59.9 

Phosphate rock and cherty phosphate 

rock 1155- RLP 1. 9 34.0 1;3 0.80 5.42 4.4 

Phosphate rock 1154- RLP Z.2 33.4 0.4;)3 0.61 5. 20 5. 9 

Phosphate rock 1153- RLP 1.2 34.3 0.96 0.64 4.94 3.2 

Chert and phosphatic muc:tstone 1152- RLP 0.5 13. 1 l. 5 2. 7 4. 30 53.4 

Phosphate rock 1151- RLP 1.5 31.7 2. s· .. 1.1 3.64 11.0 

Mudstone 1160-WOM o. 8 1.8 -- -- -- 73.0 

Mudst()ne, phosphatic .1159-WOM 2.9 8.5 -- -- -- 50.7 

* Cumulative data incomplete due to missing information., Computations start from zero after interruption. ** Note incompleteness of cumulative data. 

, 

80. 1 

81.8 

82.3 

85.3 

87.0 

88.8 

90.8 

92.2 

93.6 

94.0 

94.3 

95.9 

96.4 

96.7 

97.7 

98.4 

100. 1 

101. 3 

102.0 

103.0 

--

104.05 

105.43 

107.73 

108.83 

109.73 

111. 63 

113. 83 

115. 03 

115. 53 

117. 03 

117. 83 

120. 73 

824.33 

839.87 

840.47 

848. 57 

865.23 

867. 1\! 

936.78 

977.92 

1, 010. 86 

1, 033. 06 

1, 041. 60 

1,066.80 

1, 080. 88 

1,090.90 

1, 142. 58 

1, 154. 98 

1, 159. 21 

1, 194. 81 

1, 214. 62 

1, 271.40 

1,309.32 

1,323.53 

1, 349. 13 

--

1, 375. 91 

1,413.03 

1,437.41 

1,472.28 

1, 481. 64 

1,546.24 

1, 619. 7Z 

1, 660. 88 

1,667.43 

1,714.98 

1, 716. 42 

1, 741. 07 
1--' 

~ 

Bed 

I no. 

Cw-1 

Cw-2 

CW-3 

I __ sa:':.le Rock I Thickness description (feet) Pz05 - ----···· -------

Wells formation-top beds only 

Chert 11158-WOM I 3.5 I 4.6 -- Mudstone 1157-WQM 3.6 3. 9 --

Unit 1157-WOM contains gouge and breccia, possibly formed by faulting. 

Limestone; fos. col. no. 48-JES-190 1 1156-w~~_j __ o~2____j 0.39 --

Cumulative Thickness x 

thickness percentP 0 

(feet) ( cumula ti ~e f 

-- -- 77.3 3. 5 16. 10 

-- -- 57.9 7. 1 30. 14 

-- -- 4.6 7. 8 30.41 
........ 

(A) 

BLACKFOOT NARROWS, IDAHO. LOT NO. 1261. 

Phosphatic shale member of Phosphoria formation sampled in trench at Blackfoot Narrows approximately 500 yards north of road, sec. 24, T. 7 S., 

R. 43 E., Caribou County, Idaho, on west limb of Dry Valley anticline. Beds strike N. 10• W. and dip 10• S. Section measured by F. W. 0' Malley, 

R. A. Smart, and R. P. Sheldon and sampled by R. G. Waring in August 1948. Samples analyzed for P 0 5 and acid insoluble by U.S. Bureau of Mines 

Laboratory, Albany, Oregon, and for other constituents by Trace Elements Section Laboratory, U. S. ZOeological Survey, Washington, D. C. 

Bed Sample Thickness Chemical analyses {percent) Cumulative 

no. Rock description 

Thickness x 

no. (feet) p 0 I Al 0 ~I Fe 0 . r T~oss on I Acid thickness percent P 2o5 2 5 2 3 2 3 ignition insoluble (feet) (cumulative) 

Rex member of Phosphoria formation-basal beds only 

R- 8 Chert, argillaceous 1940-WOM 3.0 1.3 -- -- -- 89.2 3. 0 3.90 

R- 7 Mudstone, cherty 1939-WOM 1.0 o. 5 -- -- -- 88.5 4.0 4.40 

R- 6 Mudstone 1938-WOM 0.9 0.5 -- -- -- 77.8 4.9 4.85 

R- 5 Chert, argillaceous 1937-WOM 0.5 0.6 -- -- -- 89. 7 5.4 5. 15 

R- 4 Mudstone 1936-WOM 0.8 0.4 -- -- -- 82.5 6.2 5. 47 

R- 3 Chert 1935-WOM 2.3 2. 8 -- -- -- 81.9 8.5 11. 91 

R- 2 Mudstone 1934-WOM 0.7 0. 3 -- -- -- 82.7 9.2 12. 12 

R- 1 Chert 1933-WOM 2.4 6. 5 -- -- -- 72. 7 11. 6 27.72 

Phosphatic shale member of Phosphoria formation 

P-114 Mudstone, calcareous, phosphatic 1932-WOM 0.3 9. 8 -- -- -- 48.3 0. 3 2.94 

P-113 Mudstone 1931-WOM 1.0 2.5 -- -- -- 74.2 1.3 5.44 

P-112 Mudstone 1 1950-WOM 1. 5 1.3 -- -- -- 74.5 2. 8 7.39 

P-111 Mudstone; fos. col. no. 48-JES-147 1949-WOM 3.0 2. 6 -- -- -- 70.9 5. 8 15.19 

P-110 Phosphate rock, argillaceous 1948-WOM 0.8 28. 1 -- -- -- 21.8 6. 6 37.67 

P-109 Mudstone; fos. col. no. 48-JES-146 1947-WOM 2.5 2. 7 -- -- -- 71. 1 9. 1 44.42 

P-108 Mudstone; fos. col. no. 48-JES-145 1946-WOM 3.0 o. 7 -- -- -- 77.5 12. 1 46.52 

P-107 Phosphate rock 1945-WOM 0.6 34.5 1.2 0.44 2. 16 10. 1 12. 7 67.22 

P-106 Phosphate rock, argillaceous 1944-WOM 0.3 18.2 6.4 2. 4 5.68 41.3 13.0 72.68 

P-105 M1,1dstone, phosphatic 1943-WOM 0.6 12.8 6~9 3.0 5.30 54.3 13.6 80.36 

P-104 Phosphate rock 1942-WOM 0.7 32.1 1.4 1.0 2.88 13.3 14.3 102.83 

P-103 Mudstone 1941-WOM 0.3 6.4 9.4 2.9 6.44 65.3 14.6 104.75 

P-102 Phosphate rock 1930-WOM 0.9 30.2 2.5 1.1 4.42 16. 1 15. 5 131.93 

P-101 Phosphate rock 1929-WOM 0.6 31. 7 1.4 0.85 3. 18 14. 7 16. 1 150.95 

P-100 Phosphate rock 1960-WOM 0.5 28.5 3. 1 1.6 4.38 19.9 16.6 165.20 

P- 99 Phosphate rock, argillaceous; fos. 

col. no. 48-JES-144 1959-WOM 2.9 26.8 3.7 0.56 6.28 22.7 19. 5 242.92 

P- 98 Phosphate rock 1958-WOM 0.4 33.4 1. 6. 0.67 4.60 7. 8 19.9 256.28 

P- 97 Phosphate rock 1957-WOM 2.4 32. 5 2.0 0.71 6.06 8. 3 22.3 334.28 

P- 96 Phosphate rock 1956-WOM 4.8 27.9 3.0 2.3 9.42 14. 1 27. 1 468.20 

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. 
f--

1~ 

Bed 

no. 

P- 95 

P- 94 

P- 93 

P- 92 

P- 91 

P- 90 

P- 89 

P- 88 

P- 87 

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 

Rock des·cription 

Phosphate rock, argillaceous, 

calcareous 

Mudstone; fos. col. no. 48-JES-143 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic, and argillaceous 

phosphate rock 

Mudstone, phosphatic 

Mudstone; fos. col. nos. 48-JES-142 and 

48-JES-141 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone, phosphatic; fos. col. no. 48-JES-140 

Mudstone; fos. coL no. 48-JES-139 

Mudstone 

Limestone, phosphatic 

Mudstone 

Mudstone 

Phosphate rock, argillaceous 

Mudstone 

Mudstone and argillaceous phosphate 

rock 

Mudstone and phosphatic mudstone 

Phosphate rock and phosphatic mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic; fos. col. no. 

48-JES-138 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Phosphate rock, argillaceous 

Mudstone 

Mudstone 

Mudstone and phosphatic mudstone 

Mudstone 

Mudstone 

Mudstone 

Phosphate rock, argillaceous 

Sample Thickness 

no. (feet) Pz05 

1955-WOM 3. 1 15.8 

1954-WOM 2.2 7. 3 

1953-WOM 1.8 15.0 

1952-WOM 1.2 2. 9 

1951-WOM 2.0 22.4 

1964-WOM 0.8 11. 8 

1963-WOM 4.5 7. 4 

1962-WOM 0.4 13. 2 

1961-WOM 2.2 9.2 

1928- RAS 1.3 13.4 

1927- RAS 0.7 1.3 

1926- RAS 2.5 7. 6 

1925- RAS 1.6 9.4 

1924- RAS 2.6 6. 2 

1923- RAS 1.2 3. 2 

1922- RPS 1.4 17. 5 

1921- RPS 0.8 4.4 

1920- RPS 1.5 9.4 

1919- RAS 1.6 3. 7 

1918- RAS 1. 6 18. 1 

1917- RAS 0.7 13. 7 

1916- RAS 2.3 10. 7 

1877- RAS 1.8 14.8 

1880- RAS 1.2 1.4 

1879- RAS 3.2 2. 5 

1878- RAS 1.7 0.45 

1876-WOM 1.4 0.4 

1875-WOM 0.4 25. 5 

1874-WOM 1.7 1.7 

1873-WOM 2. 2 0.6 

1872-WOM 1.0 4.6 

1871-WOM 2.6 1.8 

1915-WOM 1.4 o. 5 

1914-WOM 1.0 o. 6 

1913-WOM 0.4 28.4 

Chemical analyses (percent) Cumulative Thickness x 

Al2o3 Fe2o3 

Loss on Acid thickness percent P 20 5 ignition insoluble (feet) {cumulative) 

7.7 2.2 12.82 37.5 30.2 517. 18 

-- -- -- 58.5 32.4 533. 24 

-- -- -- 45.8 34.2 560.24 

-- -- -- 70.8 35.4 563. 72 

-- -- -- 28.7 37.4 608. 52 

-- -- -- 52.2 38.2 617.96 

-- -- -- 64.1 42.7 651.26 

-- -- -- 50.7 43. 1 656.54 

-- -- -- 65.5 45.3 676. 78 

-- -- -- 57.4 46.6 694.20 

-- -- -- 86.3 47.3 695. 11 

-- -- -- 69.9 49.8 714. 11 

-- -- -- 6. 3 51.4 729. 15 

-- -- -- 71.6 54.0 745. 27 

-- -- -- 77.0 55.2 749. 11 

-- -- -- 41. 1 56.6 773. 61 

-- -- -- 75.0 57.4 777. 13 

-- -- -- 56.2 58.9 791. 23 

-- -- -- 75.7 60.5 797. 15 

-- -- -- 35.0 62. 1 826. 11 

-- -- -- 50.0 62.8 835. 70 

-- -- -- 49.6 65. 1 860.31 

-- -- -- 45.5 66.9 886.95 

-- -- -- 85.4 68. 1 888.63 

-- -- -- 82.5 71.3 896. 63 

-- -- -- 87.3 73.0 897.40 

-- -- -- 90. 1 74.4 897. 96 

-- -- -- 27.3 74.8 908. 16 

-- -- -- 84.6 76.5 911.05 

-- -- -- 88.1 78.7 912.37 

-- -- -- 78. 1 79. 7 916.97 

-- -- -- 85.5 82.3 921. 65 

-- -- -- 87. 7 83.7 922.35 

-- -- -- 87.8 84.7 922.95 

-- -- -- 20.0 85. 1 934.31 
P- 60 Mudstone 1912-WOM 0.5 5. 5 -- -- -- 70.6 85.6 937. 06 

P- 59 Phosphate rock, argillaceous 1911-WOM 0.4 22. 1 -- -- -- 36.5 86.0 945.90 

P- 58 Mudstone 1910-WOM 2.5 1.2 -- -- -- 85.7 88.5 948.90 

P- 57 Phosphate rock, argillaceous 1909-WOM 0.4 27.3 -- -- -- 21.4 88.9 959.82 

P- 56 Mudstone 1908-WOM 1.6 1.6 -- -- -- 84.3 90.5 962.38 

P- 55 Phosphate rock 1907-WOM 0.3 30.3 -- -- -- 15. 5 90.8 971.47 

P- 54 Mudstone 1906-WOM 0.8 1. 6 -- -- -- 82.4 91.6 972.75 

P- 53 Phosphate rock 1905-WOM 0.4 30.6 -- -- -- 15.3 92.0 984.99 

P- 52 Mudstone 1904-WOM 2.0 5. 9 -- -- -- 74.3 94.0 996. 79 

P- 51 Phosphate rock, argillaceous 1903-WOM 0.3 21.4 -- -- -- 34.3 94.3 1,003,21 

P- 50 Mudstone 1902-WOM 0.8 7. 7 -- -- -- 63. 1 95. 1 1, 009. 37 

P- 49 Mudstone 1901-WOM o.s 0.6 -- -- -- 87.4 95.9 1,009.85 

P- 48 Mudstone, phosphatic 1900-WOM 1.2 10. 7 -- -- -- 55.2 97. 1 1,022.69 

P- 47 Mudstone 1899-WOM 0.6 0.6 -- -- -- 88.5 97.7 1, 023. 05 

P- 46 Mudstone 1898-WOM 0.8 4.4 -- -- -- 73.8 98.5 1,026.57 

P- 45 Mudstone, phosphatic 1897-WOM 3.3 13. 1 -- -- -- 35. 1 101.8 1,069.80 

P- 44 Mudstone, phosphatic 1896-WOM 2.5 10.3 -- -- -- 53.6 104.3 1,095.55 

P- 43 Mudstone 1895-WOM 0,4 2.6 -- -- -- 78.6 104. 7 1, 096. 59 

P- 42 Mudstone, phosphatic 1894-WOM 1.2 10. 1 -- -- -- 45.9 105.9 1, 108. 71 

P- 41 Mudstone, phosphatic 1893-WOM 3.0 8. 3 -- -- -- 52.6 108.9 1, 133. 61 

P- 40 Mudstone and chert 1892-WOM 0.9 6. 6 -- -- -- 59.3 109.8 1, 139. 55 

P- 39 Mudstone, phosphatic 1891-WOM 2.0 11.9 -- -- -- 49.4 111.8 1, 163. 35 1---> 

CJ'1 P- 38 Mudstone; fos. col. nos. 438-JES-137 and 

48-JES-131 1890-WOM 2. 0 6. 8 -- -- -- 64.5 113. 8 1,176.95 

P- 37 Mudstone; fos~ col. no. 48-JES-130 1889-WOM 1.1 1.7 -- -- -- 81.6 114.9 1, 178.82 

P- 36 Mudstone 1888-WOM 2.0 7. 1 -- -- -- 65.0 116.9 1, 193. 02 

P- 35 Mudstone; fos. col. no. 48-JES-132 1887-WOM 0.6 3.6 -- -- -- 79.1 117. 5 1, 195. 18 

P- 34 Mudstone 1886-WOM 4.2 1.9 -- -- -- 79.0 121. 7 1,203.16 

P- 33 Mudstone; fos. col. no. 48-JES-129 1885-WOM 3.7 5. 5 -- -- -- 70.7 125.4 1,223.51 

P- 32 Mudstone 1884-WOM 0.8 0. 5 -- -- -- 87.9 126.2 1,223.91 

P- 31 Mudstone; fos. col. no. 48-JES-133 1883-WOM 0,8 1.2 -- -- -- 84.8 127.0 1,224.87 

P- 30 Limestone, argillaceous, phosphatic; 

fos. col. no. 48-JES-134 1882-WOM 3.7 9.6 -- -- -- 25.8 130.7 1,260.39 

P- 29 Mudstone, phosphatic 1881-WOM 0.5 12. 3 -- -- -- 54.4 131.2 1, 266. 54 

P- 28 Mudstone, phosphatic 1870-WOM 3.0 16. 1 -- -- -- 41.0 134.2 1, 314.84 

P- 27 Mudstone 1869-WOM 0.9 4.0 -- -- -- 78.0 135. 1 1,318.44 

P- 26 Mudstone, phosphatic 1868-WOM 1.7 8.0 -- -- -- 64.2 136.8 1, 332. 04 

P- 25 Mudstone, phosphatic; fos. col. no. 48-JES-1"35 1867-WOM 2.3 15. 3 -- -- -- 42.9 139. 1 1, 367. 23 

P- Z41 Phosphate rock, argillaceous 1866-WOM 2.0 22.8 -- -- -- 28.7 141. 1 1,412.83 

P- 23 Phosphate rock 1865-WOM 1.2 30.4 -- -- -- 10.6 142.3 1, 449. 31 

P- 22 Mudstone, phosphatic 1864-WOM 2.6 12.3 -- -- -- 40.6 144.9 1, 481. 29 

P- 21 I Phosphate rock 1863-WOM 0.9 26.8 -- -- -- 16.7 145.8 1, 505.41 

P- 20 Mudstone, phosphatic, and argillaceous 

phosphate rock 1862-WOM 1.0 19.0 -- -- -- 32.0 146.8 1, 524.41 
...... 

OJ 

Bed 

no. Rock description 

P- 19. Mudstone, phosphatic, and argillaceous 

phosphate rock 

P- 18 Mudstone, phosphatic 

P- 17 Phosphate rock 

P- 16 Phosphate rock 

P- 15 Phosphate rock, argillaceous 

P- 14 Phosphate rock 

P- 13 Phosphate rock 

P- 12 Phosphate rock, argillaceous 

P- 11 Phosphate rock 

P- 10 Phosphate rock, calcareous 

P- 9 Phosphate rock 

P- 8 Phosphate rock, argillaceous; fos. 

col. no. 48-JES-136 

P- 7 Phosphate rock 

P- 6 Phosphate rock 

P- 5 Phosphate rock 

P- 4 Phosphate rock 

P- 3 Mudstone 

P- 2 Mudstone 

P- 1 Phosphate rock 

Cw- 1 I Limestone 

Cw- 2 Limestone 

Sample Thickness Chemical analyses (percent) 

no. (feet) P205 Al2o3 Fe2o3 

Loss on Acid 

ignition insoluble 

1861-WOM 1.6 15.8 -- -- -- 49.0 

1860-WOM 0.9 15. 2 -- -- -- 46.0 

1859-WOM 0.9 28.5 3. 1 1.1 4.70 19. 7 

1858-WOM 2. 7 32.0 1.6 0.89 5.60 11. 1 

1857-WOM 0,4 18.0 5. 4 2.4 5.48 42.7 

1856-WOM 2.4 34.5 0,85 0. 61 4.38 5. 8 

1855-WOM 3,0 34.0 3.2 0,60 3. 12 6.9 

1854-WOM 0.3 17. 3 7.8 2.0 6.46 43.7 

1853-WOM 1.1 29.6 2.0 0.96 5. 36 16.0 

1852-WOM 0.5 19. 3 6. 1 2.8 9.78 3. 3 

1851-WOM 2.0 28.3 3. 1 1.0 7.64 15.4 

1840-WOM 0.5 20.4 5,8 2. 1 11. 06 28. 1 

1839-WOM 2.6 28.6 2.5 0.89 7.28 14. 7 

1838-WOM 0.9 26.7 2.5 1.3 6. 18 19.4 

1837-WOM 2.0 34.0 o. 71 0.48 5.92 3. 1 

1836-WOM 3. 5 30.6 1.9 0.62 5.94 9.7 

1835-WOM 0,7 1.8 7.9 3. 5 11. 92 66.7 

1834-WOM 2.0 0.8 8.7 3.2 14.50 61.0 

1833-WOM 0.3 33. 7 0.85 0.59 3.82 6.0 

Wells formation-top beds only 

1832-WOM 

1831-WOM 

Cumulative 

thickness 

(feet) 

148.4 

149.3 

150. 2 

152.9 

153.3 

155. 7 

158. 7 

159.0 

160. 1 

160.6 

162.6 

163. 1 

165. 7 

166.6 

168.6 

172. 1 

172.8 

174.8 

175. 1 

2.4 

4.0 

Thickness x 

percent P 20 5 (cumulative) 

1, 549. 69 

1, 563. 37 

1,589.02 

1,675,42 

1,682.62 

1, 765. 42 

1, 867. 42 

1, 872. 61 

1,905.17 

1,914.82 

1,971.42 

1, 981.62 

2, 055. 98 

2,080,01 

2, 148. 01 

2, 255. 11 

2, 256. 37 

2,257.97 

2, 268. 08 

1. 68 

2. 16 
...... 

--.::] 

NORTH DRY VALLEY, IDAHO. LOT NO. 12.59. 

Part of phosphatic shale member of Phosphoria formation sampled in bulldozer trench on west slope of North Dry Valley about 100 feet above 

valley bottom, sec. 31, T. 7 S., R. 44 E., Caribou County, Idaho, on east limb of Schmid syncline. Section measured by R. A. Hoppin, D. F. Davidson, 

R. P. Sheldon, and F. W. 0' Malley and sampled by R. A. Smart and R. G. Waring in August 1948. Samples analyzed for P 0 and acid insoluble by 

U.S. Bureau of Mines Laboratory, Albany, Oregon, and for other constituents by Trace Elements Section Laboratory, U. ~.Geological Survey, 

Washington, D. C. 

Bed Sample Thickness Cumulative Thickness x 

Rock description thickness percent P 20 no. no. {feet) (feet) ( cumulativef - -~-

Rex member of Phosphoria formation- basal beds only 

R- 4 Chert 1697-WOM 7.0 o. 3 -- -- -- 94.7 7. 0 2.. 10 

R- 3 Chert, argillaceous 1696-WOM 1.2. 0.2. -- -- -- 92..3 8. 2. 2..34 

R- 2. Chert, argillaceous 1695-WOM 2..5 o. 1 -- ,__ -- 93.7 10, 7 2..59 

R- 1 Chert 1694-WOM 1.9 1. 3 -- -- -- 89.6 12.. 6 5. 0(, 

Phosphatic shale member of Phosphoria formation-base not exposed 

P-101 Mudstone; fos. col. no. 48-JES-164 1 1693-WOM 4.8 1.6 -- -- -- 73.6 4.8 7.68 

P-100 Mudstone; fos. col. no. 48-JES-163 1692.-WOM 5.0 z.. 6 -- -- -- 71.8 9.8 2.0.68 

P- 99 Phosphate rock, argillaceous 1691-WOM 0.8 18.4 -- -- -- 41.4 10.6 35.40 

P- 98 Mudstone; fos. col. no. 48-JES-162. 1690-WOM 4.5 1. 6 -- -- -- 75.3 15. 1 42..60 

P- 97 Phosphate rock 1689-WOM o. 5 35. 3 1. 6 0.56 z.. 74 -6.6 15.6 60.2.5 

P- 96 Phosphate rock, argillaceous 1688-WOM 0,5 18.6 5. 8 2..33 4.08 41.6 16. i 69.55 

P- 95 Phosphate rock 1687-WOM 0.6 35. 1 1.5 0.68 2.. 74 6. 6 16.7 90.61 

P- 94 Mudstone 1686-WOM 0.4 7. 5 9.3 2..84 4.68 65.6 17. 1 93.61 

P- 93 Phosphate rock 1685-WOM 0.7 33.2. 1. 5 0.69 8.70 9. 4 17. 8 116.85 

P- 92. Mudstone, phosphatic 1684-WOM: 0~5 10.7 8.2. 2..78 5. 70 57.1 18.3 12.2..2.0 

P- 91 Phosphate rock 16'83-WOM 0,7 34.2. 1. 4 0,58 3. 18 7. 9 19.0 146. 14 

P- 90 Phosphate rock 1682.-WOM 1.2. 2.9. 5 3.3 l. 12 3.52 17.3 20.2 181. 54 

P- 89 Mudstone, phosphatic; fos. col. no. 

48-JES-161 1681-WOM 0.6 9. 1 9.8 3.58 6.14 57.6 20.8 187.00 

P- 88 Phosphate rock 1661-WOM 0.4 33.3 1. 6 0.83 3.46 9. 2 21.2 200..-32 

P- 87 Mudstone, phosphatic 1660-WOM 0.9 9. 8 8.2 3.17 6.50 58.0 2.2. 1 209. 14 

P- 86 Phosphate rock 1659-WOM 0.6 33.5 2.2. 0.98 3.90 8. 3 2.2. 7 2.29. 2.4 

P- 85 Phosphate rock 1658-WOM 2.4 34.1 2.0 0.76 3. 78 7. 4 25. 1 311. 08 

P- 84 Phosphate rock; fos. col. no. 48-JES-160 1657-WOM 4.4 2.9.4 3.3 l. 36 5.98 15.0 29.5 440.44 

P- 83 Phosphate rock, argillaceous; fos. col. no. 48-JES-159 1656-WOM 3.4 23.4 4.6 2..23 7.98 25.6 32.9 52.0.00 

P- 82 Phosphate rock, argillaceous; fos. col. no. 48-JES-158 1655- RPS 2.6 17.9 -- -- -- 34.5 35.5 566.54 

P- 81 Mudstone, phosphatic 1654- RPS 0.5 12.3 -- -- 47.8 36.0 572.69 

1 Fossil collection made by J. E. Smedley, Paleontology a.nd Stratigraphy Branch, U. S. Geological Survey. 
I-' 

co 

Bed 

no. 

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 

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 

Rock description 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone and phosphate rock 

Mudstone 

Mudstone 

Phosphate rock, argillaceous 

Mudstone, phosphatic; fos. col. no. 48-JES-157 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone; fos. col. no. 48-JES-156 

Mudstone, phosphatic 

Mudstone; fos. col. no. 48-JES-155 

Mudstone 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone, phosphatic; fos. col. no. 

48-JES-165 

Mudstone 

Mudstone 

Phosphate rock, argillaceous 

Mudstone; fos. col. no. 48-JES-154 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone, phosphatic 

Mudstone 

Limestone, argillac-eous 

Mudstone; fos. col. no. 48-JES-153 

Mudstone 

Phosphate rock 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone, phosphatic 

Sample Thickness 

no. {feet) 

1653- RPS 0.8 

1652- RPS 0.7 

1651- RPS 0.9 

1650- RPS 1. 0 

1700-WOM 1. 5 

1699-WOM . o. 4 

1698-WOM 5.0 

1720-WOM 1.5 

1719-WOM 0.7 

1718-WOM 3.3 

1717-WOM 2.8 

1116-WOM 2. 2 

1715-WOM 1.0 

1714-WOM 1.3 

1713-WOM 0.7 

1712-WOM 3. 2 

1711-WOM 0.4 

1727- DFD 1.3 

1726- DFD 0.6 

1725- DFD 0.7 

1724- DFD 1.6 

1723- DFD 1.1 

1722- DFD 0.6 

1721-DFD 0.5 

1710- DFD 3. 7 

1709- DFD 4.2 

1708- DFD 1.7 

1707- DFD 2.0 

1706- DFD 3. 1 

1705- DFD 0.8 

1704~ DFD 1.0 

1703- DFD 1.4 

1702- DFD 1. 4 

1701- DFD 1.4 

1680- DFD 1. 1 

1679- DFD 1.1 

1678- DFD 1.7 

1677- DFD 1.2 

1676- DFD 0.9 

Chemical analyses (percent) Cumulative Thickness x 

Pz05 Al2o3 Fe2o3 

Loss on Acid thickness percent P 2o5 ignition insoluble (feet) (cumulative) 

8. 3 -- -- -- 55.6 36.8 579.33 

19. 1 -- -- -- 37.3 37.5 592. 70 

12.4 -- -- -- 55.7 38.4 603.86 

1.6 -- -- -- 79.7 39.4 605.46 

18.8 -- -- -- 38.8 40.9 633.66 

24.0 -- -- -- 29.5 41. 3 643.26 

8. 1 -- -- -- 67.4 46.3 683. 76 

13.0 -- -- -- 58.0 47.8 703. 26 

27.2 -- -- -- 23.4 48.5 722.30 

5. 1 -- -- --- 76.8 51.8 739. 13 

10. 3 -- -- -- 62.6 54.6 767. 97 

5. 7 -- -- -- 74.4 56.8 780. 51 

4.8 -- -- -- 72.7 57.8 785. 31 

8.6 -- -- -- 65.9 59.1 796.49 

20.5 -- -- -- 39.0 59.8 810.84 

8. 7 -- -- -- 63.0 63.0 838.68 

4. 5 -- -- -- 66.4 63.4 840.48 

6. 2 -- -- -- 70.7 64.7 848. 54 

24. 1 -- -- -- 28.0 65.3 863.00 

5. 8 -- -- -- 71.2 66.0 867.06 

12.3 -- -- -- 51.0 67.6 886. 74 

18.5 -- -- -- 37.7 68.7 907.09 

9.8 -- -- -- 58.8 69.3 912.97 

11. 3 -- -- -- 56.3 69.8 918. 62 

4. 5 -- -- -- 76.8 73.5 935.27 

2. 0 -- -- -- 78.5 77.7 943.67 

1.7 -- -- -- 81.5 79.4 946.56 

3. 3 -- -- -- 81.3 81.4 953. 16 

1.5 -- -- -- 82.0 84.5 957. 81 

10.9 -- -- -- 60.5 85.3 966.53 

4.9 -- -- -- 78.3 86.3 971. 43 

3. 9 -- -- -- 29.7 81.1 976.89 

4.7 -- -- -- 76.3 89. 1 983.47 

3. 6 -- -- -- 77.9 90.5 988.51 

32.0 -- -- -- 13.2 91.6 1, 023. 71 

15.8 -- -- -- 45.8 92.7 1, 041. 09 

4.2 -- -- -- 76.5 94.4 1, 048. 23 

4.4 -- -- -- 71.8 95.6 1, 053. 51 

10. 1 -- -- -- 57.8 96.5 1, 062. 60 
........ 

w 

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 

P- 13 

P- 12 

P- 11 

P- 10 

P- 9 

P- 8 

P- 7 

P- 6 

P- 5 

P- 4 

P- 3 

P- 2 

P- 1 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone, phosphatic; fos. col. no. 

48-JES-152 

Mudstone 

Mudstone 

Mudstone 

Chert 

Mudstone 

Mudstone; fos. col. no. 48-JES-151 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone, phosphatic 

Mudstone; fos. col. no. 48-JES-150 

Phosphate rock, argillaceous 

Phosphate rock, argillaceous; fos. col. 

no. 48-JES-149 

Mudstone, phosphatic 

Mudstone, phosphatic; fos. col. no. 48-JES-14'8 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic 

Phosphate rock 

Mudstone, phosphatic 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Phosphate rock, argillaceous 

Phosphate rock 

Phosphate rock 

Phosphate rock and mudstone 

Phosphate rock 

Phosphate rock, argillaceous 

Phosphate rock 

Phosphate rock, argillaceous, 

calcareous 

Phosphate rock 

Phosphate rock 

1675- DFD 2.9 12.3 

1674- DFD 1. 0 8. 5 

1673,- DFD 0.6 2.4 

1672- DFD 1.5 6. 1 

1671- DFD 2. 7 12.5 

1649- DFD 1.3 7. 7 

1648- DFD 0.6 3. 7 

16.47- DFD 1.1 2. 3 

1646- DFD 0.8 1. 3 

1645- DFD 1. 9 2. 1 

1644- DFD 2.5 3. 3 

1643- DFD 0.7 4.4 

1642- DFD 0.9 7. 2 

1641- DFD 0.9 2. 3 

1640- DFD 0.9 1.5 

1670-WOM 2.7 9. 3 

1669-WOM 2.2 6. 2 

1668-WOM 1.4 19.0 

1667-WOM 0.6 20.7 

1666-WOM 1.8 10.0 

1665-WOM 2.3 15. 7 

1664-WOM 2.6 14.0 

1663-WOM 3.3 25.6 

1662-WOM 1.1 9.5 

1634-WOM 1.6 5. 8 

1635-WOM 0.6 14. 5 

1636-WOM 0.6 14.0 

1637-WOM 0.5 29.2 

1638-WOM 1. 0 13.4 

1639-WOM 1.2 15.2 

1738- RAH 1.2 20. 7 

1737- RAH 2.0 18.8 

1736- RAH 0.6 32."2 

1735- RAH 1.1 31.8 

1734- RAH 1.0 23.0 

1733-WOM· 4.0 30.9 

1732-WOM · 0.-7 20.9 

1731-WOM 0.6 . 29.2 

1730-WOM 0.6 14. 7 

1729-WOM 2.0 . 28.0 

1728-WOM 3. 5 30.4 

-- -- -- 48.3 99.4 1, 098. 27 

-- -- -- 57.0 100.4 1, 106. 77 

-- -- -- 76.8 101.0 1, 108. 21 

-- -- -- 53.7 102. 5 1,117.36 

-- -- -- 48.0 105.2 1, 151. 11 

-- -- -- 60.0 106.5 1, 161. 12 

-- -- -- 74.2 107. 1 1, 163. 34 

-- -- -- 76.7 108.2 1, 165. 87 

-- -- -- 83.3 109.0 1, 166.91 

-- -- -- 78.7 110.9 1,170.90 

-- -- -- 75.3 113.4 1, 179. 15 

-- -- -- 75.5 114. 1 1, 182. 23 

-- -- -- 63.5 115.0 1, 188. 71 

-- -- -- 80.5 115.9 1, 190. 78 

-- -- -- 81.8 116.8 1, 192. 13 

-- -- -- 59.8 119.5 1, 217. 24 

-- -- -- 66.3 121. 7 1, 230. 88 

-- -- -- 38.6 123. 1 1,257.48 

-- -- -- 32.3 123. 7 1,269.90 

-- -- -- 57.0 125. 5 1, 287. 90 

-- -- -- 44.3 127.8 1,324.01 

-- -- -- 48. 1 130.4 1,360.41 

-- -- -- 23.0 133.7 1, 444. 89 

-- -- -- 56.7 134.8 . 1, 455. 34 

-- -- -- 54.7 136.4 1,464.62 

-- -- -- 40.7 137.0 1,473.32 

-- -- -- 51.6 137.6 1, 481. 72 

-- -- -- 14.7 138. 1 1, 496.32 

-- -- -- 53.3 139.1 l, 509. 72 

-- -- -- 44.2 140.3 1, 527. 96 

-- -- -- 34.5 141. 5 1, 552. 80 

-- -- -- 36.7 143.5 1, 590. 40 

1.3 o. 79 4.28 8.8 144.1 1, 609. 72 

1.9 0.86 4.88 9. 5 145.2 1, 644. 70 

4.3 1. 75 5.40 28.5 146.2 1, 667. 70 

2.3 1. 04 5.-36 11.0 150.2 1,791.30 

6.3 1. 97 6. 10 32.5 150.9 1, 805.93 

3.6 1. 17 5.26 12.8 151.5 1, 823. 45 

12. 2.62 8.80 37.0 152. 1 1. 832. 27 

3.4 1.00 5.94 14. 5 154. 1 1,888.27 

1.6 0.91 6.02 8.5 157.6 1,994.67 
"" 0 

KENDALL CANYON, IDAHO. LOT NO. 1258. 

Phosphoria formation and upper part of Wells formation sampled in bulldozer trench on northwest side of Kendall Canyon approximately 100 feet 

above creek, sec. 28, T. 7 S., R. 44 E., Caribou County, Jdaho, on west limb of Georgetown syncline. Beds strike N. 30° W. and dip 10• W. Section 

measured by R. A. Hoppin, D. F. Davidson, R. P. Sheldon, and F. W. 0' Malley and sampled by R. A. Smart and R. G. Waring in August 1948. Samples 

analyzed for P 20_s and acid insoluble by U. S. Bureau of Mines Laboratory, Albany, Oregon, and for other constituents by Trace Elements Section 

Laboratory, U. ~ Geological Survey, Washington, D. C .. 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thl.ckness x 

Rock description I 'I , I Loss on I Acict thickness percent P 20 no. no. (feet) 5 P2°s Al2°3 Fe2°3 ignition insoluble (feet) (cumulative) 

Rex member of Phosphoria formation-top not exposed 

R-11 Mudstone 1633-WOM 10.0 o. 7 -- -- -- 86.2 10.0 7. 00 

R-10 Mudstone 1632-WOM 1.6 3. 1 -- -- -- 77.7 11. 6 11.96 

R- 9 Mudstone 1631-WOM 2.2 4.6 -- -- -- 67.8 13.8 22.o8 

R- 8 Mudstone, phosphatic 1630-WOM 1.0 7. 9 -- -- -- 56.8 14.8 29.98 

R- 7 Mudstone 1629-WOM 2.0 2. 0 -- -- -- 77.4 16.8 33.98 

R- 6 Limestone, argillaceous 1628-WOM 1.0 0.2 -- -- -- 22.2 17.8 34.18 

R- 5 Mudstone, calcareous; fos. col. no. 48-JES-1231 1627-WOM 3.5 1.1 -- -- -- 75.9 21.3 38.03 

R- 4 Mudstone 1626-WOM 4.5 4.3 -- -- -- 72.9 25.8 57.38 

R- 3 Mudstone 1625- DFD 0.8 3. 2 -- -- -- 79.4 26.6 59.94 

R- 2 Mudstone; fos. col. no. 48-JES-1 21 1624- DFD 1.2 3.0 -- -- -- 82.2 27.8 63.54 

R- 1 Chert 1623- DFD 1.1 3. 5 -- -- -- 83.8 28.9 67.39 ----------~--~~~ --------- -~--- ~ 

Phosphatic shale member of Phosphoria formation 

P-99 Phosphate rock, argillaceous; fos. 

col. no. 48-JES-122 1622- DFD o.s 22.7 -- -- -- 36.6 0.5 11.35 

P-98 Mudstone; fos. col. no. 48 -JES-1 20 1621- DFD 1.8 2. 5 -- -- -- 76.8 2. 3 15.85 

P-97 Mudstone; fos. col. no. 48-JES-119 1620- DFD 0.5 1.5 -- -- -- 82.3 2. 8 16.60 

P-96 Mudstone; fos. col. no. 48-JES-118 1619- DFD 0.8 1.6 -- -- -- 82.6 3. 6 17.88 

P-95 Mudstone 1618- DFD 1.3 1. 2 -- -- -- 80.5 4.9 19.44 

P-94 Phosphate rock 1617- DFD l.Z 36.3 0.61 0.3.Z 10.Z2 3.3 6. 1 63.00 

P-93 Mudstone, phosphatic 1(,16- DFD 1.2 9. 5 7.7 3.09 5.4Z 65. 1 7. 3 74.40 

P-9Z Mudstone 1615- DFD 0.5 z. 1 11. 3 •. 67 4.34 8Z.9 7. 8 75.45 

P-91 Phosphate rock and mudstone 1614- DFD 0.5 Z8.5 1. 0 0.68 4.02 21. 1 8. 3 89.70 

P-90 Phosphate rock 1613- DFD 0.6 34.6 3.2' 1. 71 3.46 7. 5 8. 9 110.46 

P-89 Phosphate rock 161Z- DFD 0.8 30.6 2.6 1. 15 4.60 16.6 9. 7 134.94 

P-88 Mudstone, phosphatic 1609-WOM o.8 9.Z5 7.4 2.61 5.78 62.9 10. 5 14Z.34 

P-87 Phosphate rock 1608-WOM 0.5 35.8 1. 9 0.85 7.92 2. 8 11.0 160.24 

P-86 Phosphate rock 1607-WOM 0.8 30.6 0.68 0.38 6.30 12.5 11.8 1S4.7Z 

P-85 Phosphate rock, argillaceous 1606-WOM 1. 7 Z3.8 2.9 1. 50 1. 26 28.5 13. 5 ZZ5.18 

P-84 Mudstone, phosphatic 1605-WOM 1.0 15.8 6.3 2.49 7.96 45.5 14. 5 240.98 
P-83 Phosphate rock 1604-WOM 0.6 37. 1 0.51 0.51 4.96 2.0 15. 1 263.24 

P-82 Phosphate rock 1603-WOM 2.0 33. 1 0.96 o. 51 6.94 7. 3 17. 1 329.44 

P-81 Phosphate rock 1602-WOM 3.4 25.4 3.3 1. 48 -- 19.3 20.5 415.80 

P-80 Phosphate rock 1601-WOM 2.2 24.7 3.0 1. 35 12.60 19.3 22.7 470.14 

P-79 Phosphate rock, argillaceous; fos. col. 

no. 48-JES-117 1600-WOM 2.4 21.8 5. 3 1. 67 13.26 27. 1 25. 1 522.46 

P-78 I Mudstone, phosphatic; fos. col. no. 

48-JES-116 1579- RAH 4.2 9. 7 -- -- -- 54.3 29.3 563.20 

P-77 Mudstone 1578- RAH 1.2 7.4 -- -- -- 67. 1 30.5 572.08 

P-76 MudStone 1577- RAH 1. 3 2. 1 -- -- -- 81.3 31.8 574. 81 

P-75 Mudstone, phosphatic 1599-WOM 2. 3 14.3 -- -- -- 42. 1 34.1 607.70 

P-74 Phosphate rock, argillaceous 1598-WOM 0.5 16.2 -- -- -- 32.7 34.6 615.80 

P-73 I Mudstone and argillaceous phosphate 

rock; fos. col. no. 48-JES-115 1597-WOM 5.0 9. 7 -- -- -- 40.6 39.6 664.30 

P-72 Phosphate rock, argillaceous 1596-WOM 2.0 19.2 -- -- -- 41.8 41.6 702.70 

P-71 Mudstone; fos. col. no. 48-JES-114 1595-WOM 3.7 6.4 -- -- -- 74.0 45.3 726.38 

P-70 Mudstone, phosphatic 1594-WOM 1.8 12. 7 -- -- -- 54.0 47. 1 749.2. 

P-69 Mudstone; fos. col. no. 48-JES-113 1593-WOM 3.0 7. 7 -- -- -- 69.6 so. 1 772.34 

P-68 Mudstone 1592-WOM 1.0 4. 1 -- -- -- 77.7 51. 1 776.44 

P-67 Mudstone, phosphatic 1591-WOM 1.3 10.6 -- -- -- 60.3 52.4 790.22 

P-66 Mudstone, phosphatic 1590-WOM 1.0 13.8 -- -- -- 46.8 53.4 804.02 

P-65 Mudstone 1589,-WOM 1.7 7. 2 -- -- -- 64.6 55. 1 816.26 

P-64 Mudstone, phosphatic 1588-WOM 1. 0 7. 8 -- -- -- 63.5 56. 1 824.06 !:\:) 

........ 

P-63 Limestone, argillaceous 1587-WOM 0.8 4. 1 -- -- -- 25.3 56.9 827.34 

P~62 Mudstone and argillaceous phosphate 

rock; fos. col. no. 48-JES-11 2 1586-WOM 1. 5 12.3 -- -- -- 54.6 58.4 845.79 

P-61 Mudstone; fos. col. no. 48-JES-111 1585-WOM 0.8 4.7 -- -- -- 74. 1 59.2 849.55 

P-60 Mudstone 1611- DFD 1.0 7. 2 -- -- -- 52.3 60.2 856. 75 

P-59 Mudstone, phosphatic 1569- DFD 0.7 12.7 -- -- -- 40.7 60.9 865.64 

P-58 I Phosphate rock, argillaceous; fos. col. 

no. 48-JES-110 1568- DFD 0.5 23.8 -- -- -- 23.0 61.4 877.54 

P-57 Mudstone, phosphatic 1567- DFD 1.0 14.6 -- -- -- 47.8 62.4 892.14 

P-56 Mudstone 1566- DFD 1.7 1.5 -- -- -- 87.4 64.1 894.69 

P-55 Mudstone 1565- DFD 1.2 2.0 -- -- -- 84.4 65.3 897.09 

P-54 Mudstone 1584-WOM s.o 2. 1 -- -- -- 81. 7 70.3 907.59 

P-53 Phosphate rock, argillaceous 1583-WOM 1.5 22.3 -- -- -- 35.0 71.8 941.04 

P-52 Mudstone 1564- DFD 1.1 o. 5 -- -- -- 86.8 72.9 941. 59 

P-51 Phosphate rock 1610- DFD 0.6 28.5 -- -- -- 19.5 73.5 958.69 

P-50 Mudstone 1563- DFD 4.7 5.4 -- -- -- 75.0 78.2 984.07 

P-49 Phosphate rock, argillaceous 1562- DFD ·1. 1 19.8 -- -- -- 35.3 79.3 1, 005. 85 

P-48 Mudstone; fos. col. no. 48-JES-109 1561- DFD 2.5 3. 0 -- -- -- 80.6 81.8 1,013.35 

P-47 Mudstone 1560- DFD 1. 1 0.9 -- -- -- 98.0 82.9 1,014.34 

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. 
t\:1 

"" 

Bed 

no. 

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- 3I 

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- I7 

P- I6 

P- 15 

P- 14 

Rock description 

Mudstone, phosphatic 

Phosphate rock, argillaceous, 

calcareous 

Mudstone 

Mudstone, calcareous, phosphatic; 

fos. col. no. 48-JES-108 

Mudstone, calcareous, phosphatic 

Mudstone, calcareous; fos. col. no. 48-JES-102 

Limestone; fos. col. no. 48-JES-100 

Mudstone; fos. col. no. 48-JES~101 

Mudstone 

Mudstone, phosphatic; fos. col. no. 

48-JES-99 

Mudstone 

Mudstone, phosphatic; fos. col. no. 

48-JES-98 

Mudslone, phosphatic; fos. col. no. 

48-JES-97 

Phosphate rock, argillaceous, 

calcareous 

Mudstone, phosphatic 

Mudstone, phosphatic; fos. col. no. 

48-JES-96 

Phosph3te rock, argillaceous 

Mudstone and phosphate rock 

Phosphate rock and mudstone 

Mudstone, phosphatic 

Phosphate rock 

Mudstone, phosphatic 

Phosphate rock 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone and argillaceous phosphate rock 

Phosphate rock and mudstone 

Phosphate rock 

Phosphate rock 

Phosphate rock, argillaceous and 

mudstone; fos. col. no. 48-JES-95 

Mudstone 

Phosphate rock 

Phosphate rock 

Sample Thickness 

no. (feet) Pz03, 

I582-WOM 0.4 I0.9 

I58I--WOM 1.5 I7. 5 

1580-WOM- 2.3 7. 4 

1559 .. WOM 4.5 7. 9 

1558-WOM 2.5 8. 6 

I557•WOM 2.0 1.7 

1556-WOM 3.7 o. 3 

1555-WOM 3.0 z. 3 

1554-WOM z.o 3. 9 

1553-WOM l.B 8. 1 

1552-WOM 0.6 1. 7 

1551-WOM 3.5 8.0 

1550-WOM 2.6 12. 1 

1549- DFD 0.6 16.8 

1548- DFD 0.8 8. 5 

1547- DFD 0.5 9. 3 

1546- DFD 3.3 19. 7 

1545- DFD 0.9 26.2 

1544- DFD 0.7 26.4 

1576- RAH 1.4 10~2 

1575- RAH 2.0 27.4 

1574- RAH 1. 5 7. 5 

1573- RAH 0.5 31.7 

1572- RAH 1. 1 13.0 

I571- RAH 2.3 I3. 7 

I570- RAH 0.7 17. 1 

I509- RAH 0.6 23.3 

1508- RAH 1. 5 33.4 

1507- RAH 1. 8 29.5 

1506-· RAH 1.0 18.8 

1505- RAH 0.5 5. 3 

1504- RAH 1.9 33.0 

1503- RAH 0.5 35.8 

Chemical analyses (percent) Cumulative Thickness x 

Al2o3 Fe2o3 

Loss on Acid thickness percent P 20 5 ignition insoluble (feet) (cumulative) 

-- -- -- 57. 1 83.3 1,018.70 

-- -- -- 29.8 84.8 1, 044. 95 

-- -- -- 59.5 87. 1 I, 061. 97 

-- -- -- 56.5 91.6 1, 097. 52 

-- -- -- 50.9 94.1 I, 119.02 

-- -- -- 58.2 96. 1 I, 122. 42 

-- -- -- 11.2 99.8 1, 123. 53 

-- -- -- 80.7 102.8 1,130.43 

-- -- -- 73.0 104.8 1, 138. 23 

-- -- -- 63.4 106.6 1, 152. 81 

-- -- -- 86.3 107.2 1, 153. 83 

-- -- -- 62.2 110.7 1, 181.83 

-- -- -- 52.6 113.3 I, 213.29 

-- -- -- 33.7 113. 9 1,223.37 

-- -- -- 65.3 114.7 1, 230. 17 

-- -- -- 63. 1 115.2 1,234.82 

-- -- -- 32.4 118.5 1, 299.83 

-- -- -- I4~9 119.4 I, 323. 4I 

-- -- -- I6. 7 120. 1 I, 341. 89 

-- -- -- 43.3 121.5 1, 356. 17 

-- -- -- I5. 3 123. 5 I, 410. 97 

-- -- -- 42.9 125.0 1, 422. 22 

-- -- -- 5. 7 I25. 5 I, 438. 07 

-- -- -- 47.7 IZ6. 6 1,452.37 

-- -- -- 49.3 IZ8.9 1,483.88 

-- -- -- 40.6 IZ9.6 1, 495. 85 

-- -- -- 28.6 130.2 1, 509. 83 

0.78 0.44 17.54 6. I I31. 7 I, 559. 93 

z. 1 0.85 7.08 13.3 I33.5 1,613.03 

5.0 2.00 7.02 38.3 134.5 I, 631.83 

9. 1 3.11 6. 74 69.5 135.0 1,634.48 

1.4 0.66 6.36 7. 6 136~9 I, 697. 18 

0.88 0.32 4.IZ 4.3 I37.4 1, 715.08 
c-,:) 

(A) 

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 

Cw- 2 

Cw- 3 

Cw- 4 

Cw- 5 

Cw- 6 

Cw- 7 

Cw- 8 

Cw- 9 

Cw-10 

Cw-11 

Cw-12 

Cw-13 

Cw-14 

Cw-15 

Cw-16 

Cw-17 

Cw-18 

Cw-19 

Cw-20 

Cw-21 

Cw-22 

----

Phosphate rock; fos. col. no. 48-JES-94 

Mudstone and argillaceous phosphate 

rock; fos. col. no. 48-JES-93 

Phosphate rock, argillaceous 

Phosphate rock; fos. col. no. 48-JES-92 

Phosphate rock, argillaceous; fos. col. 

no. 48-JES-91 

Phosphate rock; fos. col. no. 48-JES-90 

Phosphate rock 

Phosphate rock 

Mudstone 

Limestone, argillaceous 

Mudstone 

Mudstone 

Phosphate rock, calcareous and chert 

Limestone 

Limestone fos. col. no. 48-JES-89 

Limestone fos. col. no. 48-JES-88 

Limestone fos. col. no. 48-JES-87 

Limestone, argillaceous; fos. col. no. 

48-JES-86 

Limestone and chert 

Limestone 

Limestone 

Mudstone and limestone 

Mudstone and argillaceous limestone 

Limestone and mudstone 

Limestone and chert 

Limestone, argillaceous 

Limestone 

Mudstone 

Limestone and chert 

Limestone, sandy 

Sandstone, calcareous 

Sandstone, calcareous 

Limestone, argillaceous 

Limestone and chert 

Mudstone, calcareous 

1502- RAH 2.5 32.0 1.5 o. 71 

1501- RAH 1.2 24.2 3.8 1. 26 

1500- RAH 0.9 22.7 5. 1 1. 51 

1539-WOM 2.9 27. 1 -- --

1538-WOM 0.5 27.0 2.6 1. 33 

1537-WOM 3.7 32.6 1.4 0.58 

1536-WOM 2.2 32.4 0.94 0.38 

1535-WOM 1.3 30.65 1.5 0.66 

1534-WOM 1.3 0.6 -- -- 1533-WOM 1.5 o. 17 -- --

1532- RPS 1.9 0.33 -- -- 1531- RPS 0.6 s. 8 -- -- 1530- RPS o.s 24.7 -- -- Wells formation-upper part only 

999- DFD 3.0 o. 6 -- -- 1543- DFD 1.2 o. 5 -- -- 1542- DFD 9.4 o. 9 -- -- 1541- DFD 10.0 o. 6 -- -- 1540- DFD 10.0 o. 6 --

1519- DFD 4.6 1.5 -- -- 1518- DFD 10.0 1.8 -- -- 1517- DFD 10.0 o. 7 -- -- 1516- DFD 2.5 0.5 -- -- 1515- DFD 1.9 0.4 -- -- 1514- DFD 1.7 0.5 -- -- 1513- DFD 1.6 o. 5 -- -- 1512- DFD 3.4 0.7 -- -- 1511- DFD 3.5 o. 6 -- -- 1510- DFD 4.2 o. 5 -- --

1499- DFD 3. 1 0. 6 -- -- 1498- DFD 2. 0 0.6 -- -- 1497- DFD 2.2 o. 5 .-- -- 1496- DFD 4.6 o. 5 -- -- 1495- DFD 3.6 0.7 -- --

1494- DFD 3.4 0.6 -- -- 1493- DFD 3.8 o. 3 -- --

7.82 9. 0 139.9 1, 795. 08 

8.32 27.0 141. 1 1,824.12 

4.94 24.3 142.0 1, 844. 55 

-- 15.9 144.9 1, 923. 14 

6.74 20.5 145.4 1,936.64 

8.32 4.8 149.1 2,057.26 

8.40 4. 1 151. 3 2,128.54 

6. 16 10. 7 152.6 2, 168. 39 

-- 76.8 153.9 2, 169. 17 

-- 41.7 155.4 2, 169. 42 

-- 61.6 157.3 2, 170. 05 

-- 49.6 157.9 2, 173.53 

-- 10.0 158.4 2, 185. 88 

-- 3. 2 3.0 1. 80 

-- 4.3 4.2 2.40 

-- 13.3 13.6 10.86 

-- 2. 5 23.6 16.86 

-- 20.8 33.6 22.86 

-- 15. 9 38.2 29. 76 

-- 19.6 48.2 47.76 

-- 10. 7 58.2 54. 76 

-- 37.3 60.7 56.01 

-- 73.5 62.6 56.77 

-- 32.5 64.3 57.62 

-- 26.6 65.9 58.42 

-- 30.0 69.3 60.80 

-- 14.3 72.8 62.90 

-- 83.9 77.0 65.00 

-- 20.7 80.1 66.86 

-- 33.5 82. 1 68.06 

-- 71. 7 84.3 69. 16 

-- 90.0 88.9 71.46 

-- 43.3 92.5 73.98 

-- 39.6 95.9 76.02 

-- 78.5 99.7 77. 16 
1::\:) 

~ 

SLUG CREEK VALLEY, IDAHO. LOT NO. 1278. 

Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole no. 7 on crest of hill rising above 

Slug Creek Valley, sec. 30, T. 8 S., R. 44 E., Caribou County, Idaho, on west limb of Schmid syncline. Beds strike north and dip 8° E. 

Hole drilled in September and October 1948 by U. S. Bureau of Mines, A. E. Long in charge, and core measured and sampled by 

D. F. Davidson. Samples analyzed for P 20 5 and acid insoluble by U.S. Bureau of Mines Laboratory, Albany, Oregon. 

Chemical analyses Bed Cumulative Thickness x Sample Thickness (percent) thickness percent P Rock 20f description no. (feet) P2o5 J AClU (feet) {cumulative 

rio. 

insoluble 

Phosphatic shale member of Phosphoria formation-partial section only 

P-103 Mudstone 2722-DFD 0.3 1.1 

I 

83.7 I 0.3 

P-102 Core missing -- 2.8 -- -- 3. 1 

Mudstone 2723-DFD (0, 4) 5.6 69.3 

Sample 2723-DFD represents part of bed P-102, 

P-101 Mudstone 2724-DFD 1.1 4.5 70,5 4.2 

P-100 Mudstone 2725-DFD 0.5 4.6 72.8 4.7 

P- 99 Core missing -- 3.4 -- -- 8. 1 -- Phosphate rock, argillaceous 2726-DFD {0. 6) 28.4 22. 1 

SamJ>1e 2726-DFD represents part of bed P-99. 

P- 9.8 Phosphate rock 2727-DFD 0.4 29.3 19.5 8.5 

P- 97 Core missing -- 0.3 -- -- 8.8 

P- 96 Phosphate rock and mudstone 2728-DFD 1.9 28.7 22.3 10,7 

P- 95 Core missing -- 5. 1 -- -- 15.8 

Mudstone 2729-DFD (0. 7} 4.7 68.6 

Sample 2729-DFD represents part of bed P-95. 

P- 94 Phosphate rock, argillaceous 2730-DFD 3.6 22.7 25.6 19.4 

P- 93 Phosphate rock, argillaceous 2731-DFD 0.9 27.3 24.0 20.3 

P- 92 Core missing -- 2.6 -- -- 22.9 

P- 91 Phosphate rock, argillaceous 2732-DFD 0.5 24.5 31.4 23.4 

P- 90 Core missing -- 1.0 -- -- 24.4 

P- 89 Mudstone, phosphatic 2733-DFD 1.1 19. 1 48.6 25.5 

P- 88 Mudstone 2734-DFD 1.1 4.5 81. 7 26.6 

P- 87 Mudstone, phosphatic 2735-DFD 2. 1 13.3 58.2 28.7 

P- 86 Mudstone, phosphatic 2736-DFD 1. 1 11.3 59.5 29.8 

P- 85 Core missing -- 2. 5 -- -- 32.3 

P- 84 Mudstone, phosphatic 273.7-DFD 2.0 8.2 67.9 34.3 

P- 83 Mudstone, phosphatic 2738-DFD 2. 1 9.2 63.8 36.4 
P- 82 Mudstone 2739-DFD 1.8 6. 1 70.6 38.2 

P- 81 Mudstone, phosphatic 2740-DFD 1.6 9.7 60.5 39.8 

P- 80 Mudstone 2741-DFD l.Z 5.5 74.0 41.0 

P- 79 Core missing -- 1.0 -- -- 42.0 

P- 78 Mudstone, phosphatic 2742-DFD 1.7 10.2 59.6 43.7 

P- 77 Mudstone 2743-DFD 1.4 3.0 77.3 45.1 

P- 76 Mudstone, phosphatic 2744-DFD 0.5 8. 1 63.5 45.6 

P- 75 Core missing • -- 1.6 -- -- 47.2 

P- 74 Mudstone 2745-DFD 0.8 4.6 77.6 48.0 

P- 73 Mudstone 2746-DFD 2.6 0.4 89.0 50.6 

P- 72 Mudstone, phosphatic 2747-DFD 0.9 17.6 48.0 51.5 

P- 71 Mudstone 2748-DFD 1.0 1.1 84.5 52.5 

P- 70 Core missing -- 2.4 -- -- 54.9 

P- 69 Mudstone 2749-DFD 0.8 0.3 89. 1 55.7 

P- 68 Core missing -- 3. 1 -- -- 58.8 

P- 67 Mudstone 2750-DFD z.z z.z 83.7 61.0 

P- 66 Core missing -- 0.6 -- -- 61.6 

P- 65 Mudstone 2751-DFD 0.8 2.8 82.6 62.4 

P- 64 Mudstone 2752-DFD 1.3 0.9 88.5 63.7 

P- 63 Mudstone 2753-DFD 0.6 6.7 73.4 64.3 

P- 62 Mudstone, phosphatic 2754-DFD 1.6 19. 7 37.0 65.9 

P- 61 Mudstone 2755-DFD 3.8 4.7 80.6 69.7 

1:.\:l P- 60 Mudstone, phosphatic 2756-DFD 0.7 12.3 49.4 70.4 01 P- 59 Core missing -- 2.4 -- -- 72.8 

P- 58 Mudstone, phosphatic 2757-DFD z.z 9.9 55.6 75.0 I 21.78 

P- 57 Mudstone, phosphatic 2758-DFD 2.3 10.5 47.3 77.3 45.93 

P- 56 Mudstone, phosphatic 2759-DFD 0.7 13. 5 50. 7 78.0 55.38 

P- 55 Mudstone 2760-DFD 1.8 6.4 57.6 79.8 66.90 

P- 54 Mudstone 2761-DFD 1.7 3.0 79.1 81.5 72.00 

P- 53 Mudstone Z76Z~DFD 1'.1 0.7 87.6 82.6 72.77 

P- 52 Mudstone 2763-DFD 0.6 7. 5 59.6 83.2 77.27 

P- 51 Mudstone 2764-DFD 0.3 5.9 69.7 83.5 79.04 

P- 50 Mudstone 2765-DFD 0.4 3.8 76.5 83.9 80.56 

P- 49 Mudstone 2766-DFD 0.9 3.9 80.0 84.8 84.07" 

P- 48 Mudstone 2767-DFD 0.6 6.3 71. 1 85.4 87.85 

P- 47 Mudstone 2768-DFD z.o 2.3 82.8 87.4 92.45 

P- 46 Mudstone, phosphatic, calcareous 2769-DFD 1.9 10.3 49.3 89.3 112.02 

P- 45 Mudstone 2770-DFD 0.5 3.9 77.8 89.8 113.97 

P- 44 Mudstone, phosphatic 2771-DFD 0.7 8.4. 60.7 90.5 119.85 

P- 43 Mudstone, calcareous 2772-DFD 0.5 z. 5 49.1 91.0 121. 10 

P- 42 Mudstone, phosphatic 2773-DFD 1.8 13.4 45.8 92.8 145.22 

P- 41 Phosphate rock, argillaceous, calcareous 2774-DFD 1.7 14.2 35. 1 94.5 169.36 

P- 40 Limestone, argillaceous 2775-DFD 2.9 4. 1 30.2 97.4 181. zs 

P- 39 Mudstone, phosphatic 2776-DFD 0.7 14.7 44.6 98.1 191. 54 
M 

rn 

Bed 

no. 

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- Z6 

P- 25 

P- 24 

P- 23 

P- ZZ 

P- Zl 

P- ZO 

P- 19 

P- 18 

P- 17 

P- 16 

P- 15 

P- 14 

P- 13 

P- 12 

P- 11 

P- .10 

P- 9 

P- 8 

P- 7 

P- 6 

P- 5 

P- 4 

P- 3 

P- 2 

P- 1 

Rock description 

Mudstone, phosphatic 

Mudstone·, phosphatic 

. Mudstone, calcareous, phosphatic 

Limestone 

Phosphate rock, argillaceous, calcareous 

Core missing 

Phosphate rock, calcareous 

Limestone and phosphate rock 

Limestone 

Phosphate rock 

Limestone 

Mudstone, phosphatic 

Mudstone, calcareous, phosphatic 

Limestone, argillaceous 

Phosphate rock 

Phosphate rock 

Phosphate rock, argillacaeous 

Limestone; argillaceous 

Phosphate rock 

Phosphate rock, argillaceous 

Phosphate rock 

Phosphate rock 

Phosphate rock 

Phosphate rock, calcareous 

Phosphate rock, calcareous 

Phosphate rock, argillaceous 

Limestone, phosphatic 

Limestone 

Phosphate rock 

Phosphate rock 

Phosphate rock 

Phosphate· rock 

Phosphate rock 

Mudstone 

Limestone, argillaceous 

Mudstone 

Phosphate· rock 

Phosphate rock 

Sample Thickness 

no. (feet) 

2777-DFD z.o 2778-DFD z.o 

2779-DFD 1.7 

2780-DFD 0.8 

2781-DFD 1.8 

-- 1.1 

Z78Z-DFD 0.8 

2783-DFD 0.8 

2784-DFD 1.4 

2785-DFD 1.6 

2786-DFD 2.8 

2787-DFD 1.5 

2788-DFD 1.7 

2789-DFD 2.7 

2790-DFD 1.9 

2791-DFD 2.2 

Z79Z-DFD 1.2 

2793-DFI) 1.2 

2794-DFD 1.1 

2795-DFD 1.5 

2796-DFD 1.1 

2797-DFD 0.9 

2798-DFD 0.7 

2799-DFD z.z 2800-DFD 1.0 

3036-DFD 1.3 

3020-DFD 1.0 

3024-DFD 1.3 

2524-DFD 0.8 

2525-DFD 1. 8 

l929-DFD 1.7 

2930-DFD 1.7 

3028-DFD 1. 8 

3029-DFD 1.1 

3030-DFD 1.3 

3031-DFD 1.7 

3032-DFD 0.3 

3033-DFD 1. 1 

Chemical analyses Cumulative Thickness x (percent) thickness percent P 2o5 Pz05 

Acid (feet) (cumulative) insoluble 

14.0 47.4 100. 1 219 .. 54 

13.4 43.8 lOZ.l 246.34 

12.7 40.6 103.8 267.93 

7.4 18.6 104.6 2 73. 85 

Zl. 0 25. 1 106.4 311.65 

-- -- 107.5 -- 24.6 15.4 108.3 19.68 

16.6 10. 5 109. 1 32.96 

6.6 13. z 110.5 4Z.ZO 

26.8 14.·7 liZ• 1 85.08 

4.4 15. 1 114.9 97.40 

12.8 47.0 116.4- 116.60 

8. 1 45.0 ll8. 1' 130.37 

0.8 19.8 120.8 132.53 

26.9 18. 1 1ZZ.7 183.64 

28.8 18. o-· 124.9 247.00 

18.4 41.6 126.1 269.08 

2.4 27. 1 127.3 271.96 

32.6 9.5 128.4 307.82 

27.6 20.3 129.9 349.22 

32.6 8. 6 131.0 385.08 

29.8 13.9 131.9 411.90 

29.7 15. 1 132.6 432.69 

16.2 16.9 134.8 468.33 

23.0 16.7 135.8 491.33 

23.5 22.8 137.1 521.88 

14.5 12.9 138.1 536.38 

8.4 7. 1 139.4 547.30 

32.0 5.0 140.2 572.90 

32.4 3.3 142.0 631. zz 

34.3 2.9 143.7 689.53 

34.1 z. 6 145.4 747.50 

31.5 8.5 147.2 804.20 

4.2 70.5 148.3 808.82 

0.45 37.9 149.6 809.40 

3.0 69.9 151.3 814.50 

31.7 4.5 151.6 824.02 

33.6 2.8 152.7 860.98 -------- - -----
~ 

-..::1 

WEST.GEORGETOWN CANYON, IDAHO. LOT NO. 1264. 

Phosphatic shale member of Phosphoria formation sampled in trench on west wall of Georgetown Canyon, SEi sec. 1, T. 10 S., R. 44 E., Bear 

Lake County, Idaho, on west limb of Georgetown syncline. Beds strike N. 30° E. and dip 50° E. Section measured by D. F. Davidson and F. W. 

0 1 Malley and sampled by R. A. Smart and R. G. Waring in September 1948. Samples analyzed for P 20 5 and acid insoluble by U. S. Bureau of Mines 

Laboratory, Albany, Oregon, and for other constituents by laboratories of the U. S. Geological Survey, Geochemistry and Petrology Branch, Washington, 

D. C. 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description I I 1

1 Loss on I 

Acid thickness percent P2 0 no. no. (feet) P 2°5 Al203 Fe203 ignition insoluble (feet) ( cumulatlve r ----

Rex member of Phosphoria formation-basal beds only 

R- 7 Chert 2640-WOM 9.0 o. 5 -- -- -- 92.5 9.0 4.50 

R- 6 Chert 2639-WOM 1.2 0.9 -- -- -- 91.9 10. 2 5.58 

R- 5 Mudstone 2638-WOM 0,6 2. 1 -- -- -- 72.5 10.8 6.84 

R- 4 Mudstone 2637.,.WOM 0.8 2. 2 -- -- -- 80,8 11.6 8.60 

R- 3 Cher.t 2636-WOM 3.9 1.1 -- -- -- 91.9 15.5 12.89 

R- 2 Chert 2635-WOM 3. 3 0.9 -- -- -- 91. 2 18.8 15.86 

R- 1 Chert 2634-WOM 5.0 0.9 -- -- -- 92. 1 23.8 20.36 

Probable fault contact between Rex and Phosphatic shale members. 

Phosphatic shale member· of Phosphoria formation 

P-86 Mudstone 2633-WOM 2.6 1. 5 -- -- -- 86.5 2.6 3.90 

P-85 Phosphate rock, argillaceous 2632-WOM 0.3 25.4 -- -- -- 25.3 2. 9 11. 52 

P-84 Mudstone 1 2631-WOM 2.0 4.0 -- -- -- 73.9 4.9 19.52 

P-83 Mudstone; fos. col. no. 48-JES-217 2630-WOM 2. 5 1.1 -- -- -- 80. 1 7.4 22.27 

P-82 Mudstone; fos. col. no. 48-JES-216 2629-WOM 2.8 2. 7 -- -- -- 74.8 10.2 29.83 

P-81 Mudstone 2628-WOM 2.5 5. 1 -- -- -- 71. 1 12. 7 42.58 

P-80 Phosphate rock and calcareous 

phosphatic mudstone 2627-WOM 0.7 28.5 -- -- -- 19. 2 13.4 62.53 

P-79 Mudstone, phosphatic 2626-WOM 0.4 8. 0 -- -- -- 64. 1 13.8 65.73 

P-78 PQ.osphate rock 2625-WOM 0.7 31.2 -- -- -- 16. 5 14. 5 87.57 

P-77 Phosphate rock, argillaceous 2624-WOM 0.4 18.3 -- -- -- 39.5 14.9 94.89 

P-76 Phosphate rock 2623-WOM 0.7 30.4 -- -- -- 12. 7 15.6 116. 17 

P-75 Phosphate rock 2622-WOM 10 3 37.3 -- -- -- 7. 2 16. 9 164.66 

P-74 Phosphate rock, argillaceous 2621-WOM 2.8 23.8 -- -- -- 19.8 19. 7 231,30 

P-73 Mudstone 1841-WOM 0.3 3.3 -- -- -- 74. 1 20.0 232.29 

P-72 Mudstone, phosphatic; fos. col. no. 48-JES-215 1830-WOM 1.4 16.5 -- -- -- 49.5 21.4 255.39 

P-71 Mudstone, phosphatic 1180-WOM 2.0 8. 5 -- -- -- 68. 1 23.4 272.39 

P-70 · Mudstone, phosphatic 1179-WOM 0.6 8. 3 -- -- -- 66.9 24.0 277.37 

P-69 Mudstone 2895-WOM 2. 1 6. 3 -- -- -- 68.7 26. 1 290.60 

P-68 Mudstone 2894-WOM 0.4 7. 5 -- -- -- 60.3 26.5 Z93.60 

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraphy Branch, U. S. Geological Survey. 
C\.') 

co 

Bed 

no.· 

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 

Sample Rock description no. 

Mudstone 1178-WOM 

Mudstone 2649-WOM 

Mudstone 2648-WOM 

Mudstone 2647-WOM 

Mudstone, phosphatic, calcareous 2646-WOM 

Mudstone 2645~WOM 

Mudstone 2644-WOM 

Mudstone and argillaceous phosphate rock 2643-WOM 

Phosphate rock; fos. col. no. 48-JES-214 2642-WOM 

Mudstone, phosphatic; fos. col. no. 

48-JES-213 2'641-WOM 

Phosphate rock; fos. col. no. 48-JES-212 2900-WOM 

Mudstone, phosphatic 2893-WOM 

Phosphate rock 2899-WOM 

Mudstone, phosphatic 2898-WOM 

Mudstone, phosphatic, calcareous 2897-WOM 

Mudstone 2896-WOM 

Phosphate rock, argillaceous 2892-WOM 

Mudstone 2891-WOM 

Beds P-49 and P-50 are separated by a fault. 

Phosphate rock, calcareous, argillaceous 2888-WOM 

Mudstone 2887-WOM 

Mudstone, phosphatic, calcareous; 

fos. col. no. 48-JES-211 2886-WOM 

Mudstone, phosphatic; fos. col. no. 

48-JES-210 2885-WOM 

Limestone concretion, argillaceous 2884-WOM 

Chert 2883-WOM 

Mudstone 2882-WOM 

Mudstone; fos. col. no. 48-JES-209 2881-WOM 

Mudstone; fos. col. no. 48-JES-208 2880-WOM 

Mudstone 2879-WOM 

Mudstone, phosphatic 2871-WOM 

Mudstone, phosphatic 2878-WOM 

Phosphate rock, argillaceous 2877-WOM 

Mudstone 2876-WOM 

Mudstone, phosphatic 2875-WOM 

Mudstone, phosphatic 2928- DFD 

Phosphate rock and phosphatic mudstone 2927- DFD 

Thickness 

{feet) P20s 

1. 1 4.8 

0.7 4.8 

0.5 o. 9 

2.0 2.5 

1.8 14.3 

0.8 1.4 

1.9 3.2 

2.0 2. 6 

0.5 30. 7 

1.1 8.3 

0.6 33.8 

0.3 15.3 

0.9 31.0 

0.6 9. 3 

0.5 15. 1 

1.3 3. 6 

0.3 19. 4 

1.8 2. 1 

1.1 16. 1 

1.8 5. 4 

2.6 13.4 

1.2 8. 2 

(2. 4) 0.6 

0.3 o. 6 

3.6 2. 7 

2.0 4. 1 

3.4 3.9 

1.6 2. 2 

2. 1 11.0 

0.3 8. 2 

1.1 17. 6 

0.3 3.4 

0.8 8. 2 

0.6 15.8 

0.8 15.4 

Chemical analyses (percent) Cumulative Thickness x 

Al2o3 Fe2o3 

Loss on Acid thickness percent P 2o5 ignition insoluble {feet) {cumulative) 

-- -- -- 63.2 27.6 29B.88 

-- -- -- 74.5 28.3 302.24 

-- -- -- 86. 1 28.8 302.69 

-- -- -- 80.4 30.8 307.69 

-- -- -- 41.5 32.6 333.43 

-- -- -- 87.6 33.4 334.55 

-- -- -- 82.9 35.3 340.63 

-- -- -- 83.5 37.3 345.83 

-- -- -- 14.9 37.8 361. 18 

-- -- -- 68 •. 5 3~.9 370. 31 

-- -- -- 8.2 39.5 390.59 

-- -- -- 45.5 39.8 395. 18 

-- -- -- 11.4 40.7 423.08 

-- -- -- 62.2 41.3 428.66 

-- -- -- 41.3 41.8 436.21 

-- -- -- 78.9 43. 1 440.89 

-- -- -- 33.3 43.4 446.71 

-- -- -- 81.2 45.2 450.49 

-- -- -- 29.1 46.3 468.20 

-- -- -- 70.3 48. 1 477.92 

-- -- -- 43.1 50.7 512.76 

-- -- -- 61. 1 51.9 522.60 

-- -- -- 19.5 -- --

-- -- -- 90.0 52.2 522.78 

-- -- -- 78.3 55.8 532.50 

-- -- -- 71.3 57.8 540.70 

-- -- -- 76.7 61.2 553.96 

-- -- -- 83.5 62.8 557.48 

-- -- -- 58.9 64.9 580.58 

-- -- -- 64.3 65.2 583.04 

-- -- -- 37. 1 66.3 602.40 

-- -- -- 78.5 66.6 603.42 

-- -- -- 66. 1 67.4 609.98 

-- -- -- 41.8 68.0 619.46 

-- -- -- 40.6 68.8 631. 78 
1:\:) 

1:.0 

P-33 Mudstone, phosphatic 2926- DFD 0.5 11.8 -- -- -- 51.0 69.3 637.68 

P-32 Phosphate rock, argillaceous 2925- DFD 0.7 18.3 -- -- -- 34.4 70.0 650.49 

P-31 Phosphate rock, argillaceous 2924- DFD 0.5 17. 5 -- -- -- 40.7 70.5 659.24 

P-30 Phosphate rock 2923- DFD 0.6 23.9 -- -- -- 15.4 71. 1 673.58 

P-29 Mudstone, calcareous 2922- DFD 0.35 3. 8 -- -- -- 43.6 71.45 674.91 

P-28 Phosphate rock and phosphatic mudstone 2870- DFD 1.5 23.0 -- -- -- 23.6 72.95 709.41 

P-27 Mudstone, phosphatic 2869- DFD 0.70 10. 7 -- -- -- 56. 1 73.65 716.90 

P-26 Limestone 2868- DFD 1. 3 2. 8 -- -- -- 17.8 74.95 720.54 

P-25 Mudstone,· phosphatic 2867- DFD 1.0 10.6 -- -- -- 55.5 75.95 731. 14 

P-24 Mudstone, phosphatic 2866- DFD 2.3 9. 6 -- -- -- 58.2 78.25 753.22 

P-23 Limestone, argillaceous 2865- DFD 1.1 0.9 -- -- -- 23.5 79.35 754.21 

P-22 Phosphate rock 2864- DFD 0.9 26.5 -- -- -- 19.9 80.25 778.06 

P-21 Phosphate rock 2863- DFD 0.85 26.3 -- -- -- 18.3 81. 10 800.42 

P-20 Phosphate rock, argillaceous 2862- DFD 0.75 22.8 -- -- -- 29.4 81. 85 817.52 

-- Limestone concretion 2861- DFD (1. 0-1. 2) 4.2 -- -- -- 5. 5 -- -- P-19 Phosphate rock 2910- DFD 2.0 27.8 -- -- -- 13.4 83.85 873.12 

P-18 Phosphate rock, argillaceous 2909- DFD 2. 1 24.1 -- -- -- 23.5 85.95 923.73 

P-17 Mudstone, calcareous, phosphatic 2908- DFD 0.8 a. 3 -- -- -- 49.4 86.75 930.37 

P-16 Mudstone, phosphatic 2907- DFD 0.7 14.5 -- -- -- 47.7 87.45 940.52 

-- Limestone concretion; fos. col. no. 48-JES-207 2906- DFD (0. 9) 4. 1 -- -- -- 19. 5 -- -- P-15 Mudstone, phosphatic 2905- DFD 1.6 13. 7 -- -- -- 50.2 89.05 962.44 

P-14 Phosphate rock 2904- DFD 1.8 27.4 3.0 1. 2 9. 16 17. 7 90.85 1,011.76 

P-13 Phosphate rock, argillaceous 2903- DFD 1. 6 26.4 2. 5 0.89 7.96 22.3 92.45 1, 054.00 

P-12 Phosphate rock, argillaceous 2902- DFD 1.3 24.4 3.6 2. 5 9.62 23.9 93.75 1, 085. 72 

P-11 Phosphate rock, argillaceous 2901- DFD 1. 0 25.7 3.3 1.2 8. 18 23.7 94.75 1,111.42 

P-10 Mudstone, phosphatic 2920- DFD 0.6 12.5 8.3 2. 5 8.32 55. 1 95.35 1,118.92 

P- 9 Mudstone, phosphatic 2919- DFD 1.0 13. 7 8.2 2.4 7. 06 52.8 96.35 1, 132.62 

P· 8 Phosphate rock, argillaceous 2918- DFD 2.2 26.5 3.7 1.3 7. 74 21.4 98.55 1, 190. 92 

P- 7 Phosphate rock 2917- DFD 4.0 27.2 1.2 0.86 6.60 19. 2 102. 55· 1, 299. 72 

P· 6 Mudstone, phosphatic 2916- DFD · 1.4 16.8 6.6 2. 0 7. 02 44. 1 103.95 1, 323. 24 

P- 5 Phosphate rock, argillaceous 2915- DFD 1.0 21.5 5.0 1.4 5.82 32.6 104.95 1,344.74 

P- 4 Phosphate rock 2914- DFD 1.4 32.6 1.2 0.60 6.26 6. 1 106.35 1, 390. 38 

P- 3 Phosphate rock, argillaceous, calcareous 2913- DFD 0.7 13.4 5.9 2.2 13. 10 33.6 107. 05 1,399.76 

P- 2 Limestone; fos. col. no. 48-JES-206 2912- DFD 0.5 6. 5 2.7 1. 1 35.30 10.3 107.55 1,403.01 

P- 1 Phosphate rock 2911- DFD 0.22 34. 7 1.5 0.90 3.02 5. 6 107. 77 1,410.64 

Fault contact between Phosphoria and Wells formations. 

Wells formation 

cw-1 I Limestone 12921- DFD I -~~-T--3.3~r=-~-- I -- j s.-o~-~ o. 5 J 1. 65 
c.u 

0 

EAST GEORGETOWN CANYON, IDAHO. LOT NO. 1267. 

Phosphatic shale member of Phosphoria formation sampled in bulldozer trench of Central Farmers' Fertilizer Cooperative, on east side of 

canyon about 1,000 feet above Georgetown Creek, NEiNWt sec. 30, T. 10 S., R. 45 E., Bear Lake County, Idaho, on east limb of Georgetown syncline. 

Beds strike 10• E. and dip 70° W. Section measured by R. A. Harris and F. W. 0' Malley and sampled by R. A. Harris and R. A. Smart in October 1948. 

Samples analyzed for P 20_s and acid insoluble by U.S. Bureau of Mines Laboratory, Albany, Oregon, and for other constituents by laboratories of the 

U. S. Geological Survey, Geochemistry and Petrology Branch, 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 P 2°5 Al203 Fe203 ignition insoluble (feet) (cumulative) 

Rex member of Phosphoria formation-basal beds only 

R- 3 Chert 3240-WOM 3.0 0.8 -- -- -- 91.3 3.0 2.40 

R- 2 Chert 3260-WOM 3.5 1.1 -- -- -- 90.6 6. 5 6.25 

R- 1 Mudstone, calcareous 3259-WOM 1. 0 1.5 -- -- -- 69.8 L5 7.75 

Phosphatic shale member of Phosphoria formation-base not exposed 

P-108 Mudstone 3258-WOM 0.5 3. 6 -- -- -- 80.6 0.5 1. 80 

P-107 Mudstone 3257-WOM 0.6 3.0 -- -- -- 80.9 1.1 3.60 

P-106 Phosphate rock 3256-WOM 0.3 26. 1 -- -- -- 23.2 1.4 11.43 

P-105 Mudstone 3255-WOM 1.0 3.3 -- -- -- 75.8 2.4 14.73 

P-104 Mudstone, phosphatic 3254-WOM 1.0 8.4 -- -- -- 61. 2 3. 4 23.13 

P-103 Mudstone 3253-WOM 3.3 1.0 -- -- -- 81. 1 6. 7 26.93 

P-102 Mudstone, calcareous 3252-WOM 3.0 o. 8 -- -- -- 74.9 9. 7 28.83 

P-101 Mudstone 1 3251-WOM 1.5 2.9 -- -- -- 74.5 11. 2 33. 18 

P-100 Mudstone: fos. col. no. 48-JES-370 3250-WOM 2.0 2. 4 -- -- -- 76.8 13.2 37.98 

P- 99 Mudstone 3249-WOM 0.3 6. 1 -- -- -- 64.3 13.5 39.81 

P- 98 Mudstone; fos. col. no. 48-JES-369 3248-WOM 2.5 2. 7 -- -- -- 77.5 16.0 46.56 

P- 97 Mudstone, calcareous; fos. col. no. 

48-JES-368 3247-WOM 2.5 3. 7 -- -- -- 49.9 18.5 55.81 

P- 96 Phosphate rock, argillaceous 3246-WOM 0.3 24.0 -- -- -- 25.8 18.8 63.01 

P- 95 Mudstone 3245-WOM 0.9 4.5 -- -- -- 74.7 19. 7 67.06 

P- 94 Mudstone, phosphatic 3244-WOM 0.3 11.5 -- -- -- 58.0 20.0 70.51 

P- 93 Mudstone 3243-WOM 3.0 1.1 -- -- -- 84.2 23.0 73.81 

P- 92 Mudstone, phosphatic 3242-WOM 0.5 8.8 -- -- -- 62.1 23.5 78.21 

P- 91 Mudstone, phosphatic 3241-WOM 1. 0 9.5 -- -- -- 52.4 24.5 87.71 

P- 90 Phosphate rock 3239-WOM 0.6 32.4 1. 1 0.88 3.34 11.9 25. 1 107.15 

P- 89 Mudstone, phosphatic 3238-WOM 1. 0 8. 1 9.0 3.4 5.52 64.3 26. 1 115.25 

P· 88 Phosphate rock 3237-WOM 2.0 36.3 o.so 0.35 3.00 4.7 28. 1 187.85 

P- 87 Mudstone 3236-WOM 1.3 7. 1 4.0 2.8 4.92 67.6 29.4 197.08 

P- 86 Phosphate rock and phosphatic mudstone 3235-WOM 1.0 28.5 6.6 1.2 3.08 20.9 30.4 225.58 

P- 85 Mudstone and phosphate rock 3234-WOM 0.8 20.0 5.2 2. 1 4.40 39.3 31.2 241. 58 

P- 84 Phosphate rock 3233-WOM 1.1 30.2 1. 6 0.87 3. 18 14. 7 32.3 274.80 
P- 83 Phosphate rock, argillaceous 3232-WOM 0.8 23.0 4.80 1.8 4.90 31.8 33.1 293.20 

P- 82 Phosphate rock and phosphatic mudstone 3231-WOM 1.0 32.5 2.0 1.0 2.92 12.5 34. 1 329.70 

P- 81 Phosphate rock 3300-WOM 1.2 37.3 0.40 0.40 2.36 4. 2 35.3 370.46 

P- 80 Phosphate rock 3299-WOM 1.0 33.6 1. 7 0.93 5.08 8. 5 36.3 404.06 

P- 79 Phosphate rock, argillaceous 3298-WOM 0.7 19.8 4.0 1.9 6.56 37.3 37.0 417.92 

P- 78 Phosphate rock and phosphatic mudstone 3297-WOM 1.1 23.6 3.6 1.4 9.04 25.8 38. 1 443.88 

P- 77 Phosphate rock 3296-WOM 1.4 34.7 1.0 0. 54 5.38 5. 3 39.5 492.46 

P- 76 Phosphate rock 3295-WOM 1.5 35.6 0.86 0.52 6.90 3.0 41.0 545.86 

P- 75 Phosphate rock, calcareous 3294-WOM 2.4 25. 1 2.6 1.1 16.54 14.3 43.4 606.10 

P- 74 Phosphate rock 3293-WOM 3.0 27.2 2.5 1.2 14. 12 12.9 46.4 687.70 

P- 73 Mudstone and phosphate rock 3292-WOM 0.3 26.0 2.6 1.2 14.24 16.3 46.7 695.50 

P- 72 Phosphate rock 3291-WOM 2.0 23.7 3.4 1.5 15. 18 18.8 48. 7 742.90 

P- 71 Phosphate rock, argillaceous 3290-WOM 2.8 17. 5 4.7 1.8 14.56 34.6 51. 5 791.90 

P- 70 Mudstone 3289-WOM 1.2 6. 9 -- -- -- 63.0 52.7 800. 18 

P- 69 Mudstone 3288-WOM 1.2 1.6 -- -- -- 83.0 53.9 802. 10 

P- 68 Phosphate rock, argillaceous 3287-WOM 2.5 17.0 -- -- -- 37.7 56.4 844.60 

P- 67 Phosphate rock, argillaceous 3286-WOM 2.0 19.5 -- -- -- 37.8 58.4 883.60 

P- 66 Mudstone, phosphatic 3285-WOM 1.5 16.6 -- -- -- 45.8 59.9 908.50 

P- 65 Phosphate rock, argillaceous 3284-WOM 1.1 28.2 -- -- -- 22.0 61.0 939.52 

P- 64 Mudstone 3283-WOM 1.1 5. 7 -- -- -- 77.3 62. 1 945.79 

P- 63 Mudstone 3192- RH 1. 0 7. 6 -- -- -- 71.5 63. 1 953.39 

P- 62 Phosphate rock, argillaceous 3191- RH 1.0 21.4 -- -- -- 34.3 64. 1 -974. 79 

w P- 61 Mudstone, phosphatic 3282-WOM 2.0 10.4 -- -- -- 64.2 66. 1 995.59 ....... P- 60 Mudstone, phosphatic 3281-WOM 0.8 8. 4 -- -- -- 69.2 66.9 1,002.31 

P- 59 Mudstone 3280-WOM 1.3 5. 7 -- -- -- 73.0 68.2 1,009.72 

P- 58 Mudstone, phosphatic 3279-WOM 0.7 13.9 -- -- -- 51. 2 68.9 1,019.45 

P- 57 Phosphate rock, argillaceous 3278-WOM 0.7 20.8 -- -- -- 38.2 69.6 1,034.01 

P- 56 Mudstone, phosphatic 3277-WOM 0.4 13.6 -- -- -- 50.8 ... 70.0 1, 039.45 

P- 55 Mudstone, phosphatic 3276-WOM 1.2 11.4 -- -- -- 54.5 71.2 1, 053. 13 

P- 54 Mudstone 3275-WOM 1.0 3. 7 -- -- -- 74.9 12.2 1, 056. 83 

P- 53 Mudst~ne, phosphatic 3274-WOM 0.6 15.6 -- -- -- 46. 1 72.8 1, 066. 19 

P- 52 Phosphate rock, argillaceous 3273-WOM 0.6 21.6 -- -- -- 33.0 73.4 1, 079. 15 

P- 51 Mudstone, phosphatic 3272-WOM 0.8 12. 7 -- -- -- 53.6 74.2 1, 089.31 

P- 50 Mudstone 3271-WOM 1.0 5. 2 -- -- -- 69.1 75.2 1, 094. 51 

P- 49 Mudstone 3270-WOM 2.0 5. 3 -- -- -- 76.4 77.2 1,105.11 

p:.. 48 Mudstone. 3269-WOM 2.5 4.8 -- -- -- 70.8 79.7 1,117.11 

P- 47 Mudstone 3268-WOM 0.4 1.4 -- -- -- 83.7 80. 1 1,117.67 

P- 46 Mudstone 3267-WOM 1.3 2.4 -- -- -- 80.7 81.4 1, 120.79 ~ P- 45 Mudstone 3266-WOM 1.2 1. 8 -- -- -- 84.2 82.6 1,122.95 

P- 44 Mudstone 3265-WOM 1. 5 5. 6 -- -- -- 70.7 84. 1 1, 131.35 

P- 43 Mudstone, phosphatic 3264-WOM 1. 0 15.7 -- -- -- 41. z 85. 1 1,147.05 

P- 42 Mudstone 3263-WOM 1.2 3. 9 -- -- -- 74.0 86.3 1, 151. 73 

P- 41 Mudstone, phosphatic 3262-WOM 0.5 14. 7 -- -- -- 41.3 86.8 1, 159.08 

P- 40 Phosphate rock 3261-WOM 0.8 26.5 -- -- -- 15. 9 87.6 1, 180. 28 

1 Fossil collection made by J. E. Smedley, Paleontology and Stratigraohv 'R.,. ... ...,ch, U. S. Geological Survey. 
c..o 

c-.:> 

Bed 

no. 

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 

P- 13 

P- 12 

P- 11 

P- 10 

P- 9 

P- 8 

P- 7 

P- 6 

P- 5 

P- 4 

Rock description 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone 

Phosphate rock 

Mudstone 

Phosphate rock, argillaceous 

Mudstone 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic, calcareous 

Mudstone, calcareous, phosphatic 

Mudstone, calcareous 

Mudstone, calcareous 

Mudstone 

Mudstone 

Chert 

Mudstone 

Mudstone 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone 

Covered 

Limestone 

Phosphate rock, argillaceous 

Phosphate rock, calcareous, argillaceous 

Limestone, phosphatic, argillaceous 

Limestone, phosphatic 

Phosphate rock 

Phosphate rock 

Phosphate rock 

Phosphate rock and phosphatic mudstone 

Sample Thickness 

no. (feet) P2o5 

3230-WOM 0.5 16.4 

3229-WOM · 1.5 20.3 

3228-WOM 2.0 1. 4 

3227-WOM 2.0 28.8 

3226-WOM 2.0 9.9 

3225-WOM 1.5 20.5 

3224-WOM 0.6 7.4 

3223-WOM 1.5 11. 1 

3222-WOM 1.0 1.9 

3221-WOM 2.0 8. 7 

3220- RH 2. 5 11.5 

3219- RH 3.0 9.6 

3218- RH 1.5 3. 7 

3217- RH 0.8 1.4 

3216- RH 0.7 2. 3 

3215- RH 2.5 1. 1 

3214- RH 0.4 1.4 

3213- RH 0.7 2.4 

3212- RH 2.3 1. 9 

3211- RH 1.5 8. 2 

3210- RH 1.5 1. 5 

3209- RH 1.5 4.7 

3208- RH 1.0 8. 7 

3207- RH 0.9 o. 8 

3206- RH 1.0 3.8 

3205- RH 1.3 1.8 

-- 40. -- 3203- RH 1.0 2. 9 

3202- RH 1.8 21. 1 

3201- RH 0.8 17. 2 

3200- RH 0.7 1 o. 7 

3199- RH 2.4 11.4 

3198- RH 1. 5 33.4 

3197- RH 1. 0 35.2 

3196- RH 1.5 36.2 

3195- RH 1.5 27. 1 

Chemical analyses (percent) Cumulative Thickness x 

Al2o 3 Fe2o 3 

Loss on Acid thickness percent P 20 

ignition insoluble {feet) (cumulativef 

-- -- -- 44.9 88. 1 1, 188.48 

-- -- -- 36.0 89.6 1,218.93 

-- -- -- 87. 1 91.6 1, 221.73 

-- -- -- 16. 7 93.6 1, 279. 33 

-- -- -- 62.7 95.6 1, 299. 13 

-- -- -- 34.9 97. 1 1,329.88 

-- -- -- 68.2 97.7 1,334.32 

-- -- -- 56. 1 99.2 1, 350. 97 

-- -- -- 83.7 100.2 1, 352. 87 

-- -- -- 62.5 102. 2 1, 370. 27 

-- -- -- 42.1 104.7 1,399.02 

-- -- -- 40.5 107.7 1,427.82 

-- -- -- 62.5 109.2 1, 433. 37 

-- -- -- 58.0 110.0 1,434.49 

-- -- -- 70.9 110. 7 1,436.10 

-- -- -- 80.4 113.2 1, 438. 85 

-- -- -- 88.7 113.6 1,439.41 

-- -- -- 83.5 114.3 1, 441. 09 

-- -- -- 79. 1 116.6 1, 445.46 

-- -- -- 60.2 ll8. 1 1, 457. 76 

-- -- -- 86.7 119.6 1,460.01 

-- -- -- 74.2 121. 1 1, 467.06 

-- -- -- 61. 1 122. 1 1, 475. 76 

-- -- -- 87.5 123.0 1,476.48 

-- -- -- 77.2 124.0 1,480.28 

- -- -- -- 81.9 125.3 1, 482. 62 

-- -- -- -- 165.3 -- -- -- -- 15. 1 166.3 2.90* 

-- -- -- 32.4 168.1 40.88 

-- -- -- 25.7 168.9 54.64 

-- -- -- 20.3 169.6 62. 13 

-- -- -- 8. 9 172.0 89.49 

0.99 0.46 6.54 6.3 173. 5 139. 59 

0.72 0.59 6.54 3. 3 174.5 174. 79 

0.26 0.35 5.28 1.8 176.0 229.09 

-- -- -- 21. 1 177.5 269. 74 
<:.;.:> 

<:.;.:> 

PPP3 

2 

1 

Limestone, argillaceous 3194- RH 

o. 5 ) I I. 71 -- -- -- 32.5 

Limestone, argillaceous 3193- RH 1 5 0 5 . -- -- -- 36.5 

Covered -- 2. 0(?) _... ~ - - -- -- -- --

Phosphoria-Wells contact not exposed; covered interval probably not more than 3 feet thick. 

Wells formation-not exposed 

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 

** Note ~ncompleteness of cumulative data . 

./ 

178.0 

I 

270.59 

179. 5 271.34** 

181.5 --
C...:> 

f.!:>. 

PARIS CANYON, IDAHO. LOT NO. 1266. 

Phosphatic shale member of Phosphoria formation sampled in bulldozer trench on north side of Paris Canyon, sec. 8, T. 14 S., R. 43 E., 

Bear Lake County, Idaho, on overturned west limb of Paris syncline. Beds strike N. 2• E. and dip 35• W. Section measured by F. W. 0' Malley, 

R. A. Harris, and D. F. Davidson and sampled by R. G. Waring and'Harris in September 1948. Samples analyzed for P 2o5 and acid insoluble by 

'U.S. Bureau of Mines Laboratory, Albany, Oregon, and for other constituents by laboratories of the U.S. Geological Survey, Geochemistry and 

Petrology Branch, Washington, D. C. 

I 

Bed Sample Thickness Chemical analyses {percent) Cumulative Thickness x Rock description I I I Loss on I Acid thickness percent P 20 no. no. (feet) p 2°s Al203 Fe203 ignition insoluble (feet) (cumulativef ---- Rex member of Phosphoria formation-basal beds only 

R- 3 Chert 3180-WOM 1.0 0. 8 -- -- -- 94.5 1.0 0.80 

R- 2 Chert 3179-WOM 1.1 2.3 -- -- -- • 89.0 2. r 3.33 

R- 1 Chert 3178-WOM 3.0 1.3 -- -- -- 93. 1 s. 1 7.23 L__ ___ - ~~- ~~- -- ------ --------

Phosphatic shale member of Phosphoria formation 

P-119 Mudstone and phosphatic mudstone 3177-WOM 1.0 3. 2 -- -- -- 74.4 1.0 3.20 

P-118 Mudstone 3176-WOM 3.0 3. 5 -- -- -- 73.8 4.0 13.70 

p:..117 Mudstone 1 3175-WOM 0.7 0.8 -- -- -- 77.9 4. 7 14.26 

P-116 Mudstone; fos. col. no. 48-JES-367 3174-WOM 3.4 1.2 -- -- -- 77.6 8. 1 18.34 

P-115 Mudstone 3173-WOM 3.0 s. 8 -- -- -- 68.7 11. 1 35.74 

P-114 Mudstone 3172-WOM 3.0 2. 3 -- -- -- 75.5 14. 1 42.64 

P-113 Phosphate rock 3171-WOM 1.7 35.6 0. 92 0.74 5.54 5. 6 15.8 103.16 

P-112 Mudstone 3170-WOM 0.9 7. 4 8.2 3.06 6. 76 65.4 16.7 109.82 

P-111 Phosphate rock, argillaceous 3169-WOM 1.0 21.6 2.7 1.4 6.66 33.0 17.7 131.42 

P-110 Mudstone 3168-WOM 0.4 5.3 1. 2 0.77 5.90 62.8 18. 1 133.54 

P-109 Phosphate rock 3167-WOM 0.8 34.7 3.5 1.4 10.54 6. 2 18.9 161.30 

P-108 Phosphate rock, argillaceous 3166-WOM o.s 25.5 0.76 0.66 3.48 23.6 19.4 174.05 

P-107 Phosphate rock 3165-WOM 0.6 33.7 9.2 3. 1 6.80 6.9 20.0 194.27 

P-106 Phosphate rock, argillaceous; fos. col. no. 48-JES-366 3164-WOM 0.9 21. 7 4.9 2. 2 6.48 30.0 20.9 213.80 

P-105 Phosphate rock 3163-WOM o.s 31. 6 9.9 4. 1 10. 56 9.4 21.4 229.60 

P-104 Phosphate rock 3162-WOM 1.0 30.5 2. 1 1.1 12.56 7. 4 22.4 260.10 

P-103 Limestone 3161-WOM 0.4 4.8 1.4 0.69 39.82 9.3 22.8 262.02 

P-102 Phosphate rock 3160-WOM 1.1 31.8 . 1.1 0.60 13.10 s. 2 23.9 297.00 

P-101 Phosphate rock, calcareous, argillaceous 3159-WOM 0.9 22.8 3.0 1.4 15.64 20. 1 24.8 317.52 

P-100 Phosphate rock, argillaceous, calcareous 3158-WOM 0.6 18.5 4.8 2. 8 16.56 29.3 25.4 328.62 

P- 99 Phosphate rock and argillaceous 

calcareous phosphate rock 3157-WOM 0.6 26.7 1.7 0.74 13.30 15. 3 26.0 344.64 

P- 98 Phosphate rock, argillaceous, calcareous 3156-WOM 0.8 20.2 4.0 1.7 17.46 25.2 26.8 360.80 

P- 97 Limestone 3155-WOM 0.6 2. 8 -- -- -- 11.5 27.4 362.48 

P- 96 Limestone, argillaceous 3154-WOM 1.3 2. 9 -- -- -- 35.4 . 28.7 36~. 25 

P- 95 Mudstone 3153-WOM Z.3 3. 3 -- -- -- 65.0 31.0 373.84 
P- 94 Limestone 3152-WOM 3.5 0.6 -- -- -- 13.2 34.5 375.94 

P- 93 Mudstone, calcareous 3151-WOM 0.4 3. 8 -- -- -- 53.0 34 .• 9 377.46 

P- 92 Phosphate rock, argillaceous 3150-WOM 0.6 22.5 -- -- -- 28.4 35.5 390.96 

P- 91 Phosphate rock, argillaceous 3149-WOM 0.5 18.8 -- -- -- 32.0 36.0 400.36 

P- 90 Phosphate rock 3148•WOM 0.6 32.0 -- -- -- 9. 3 36.6 419.56 

P- 89 Phosphate rock, argillaceous 3147-WOM 0.7 16. 5 -- -- -- 20. 7 37.3 431. 11 

P- 88 Mudstone, phosphatic 3146-WOM 2.2 10.9 -- -- -- 27.5 39.5 455.09 

P- 87 Phosphate rock, argillaceous 3145-WOM 3.7 13. 1 -- -- -- 25. 1 43.2 503.56 

P- 86 Phosphate rock, 

arg:l.llaceous · 3144-WOM 2.7 18.5 -- -- -- 29.2 45.9 553.51 

P- 85 I Mudstone, phosphatic 3143-WOM 2.8 14.8 -- -- -- 42.7 48.7 594.95 

P- 84 Mudstone 3142-WOM 0.6 6. 3 -- -- -- 61.7 49.3 598.73 

P- 83 Mudstone 3141-WOM 1. 2 2. 5 -- -- -- 75.4 50.5 601.73 

P- 82 Phosphate rock, argillaceous 3140-WOM 0.8 21.6 -- -- -- 30.2 51.3 619.01 

P- 81 Mudstone; fos. col. no. 48-JES-365 3139-WOM 3.3 5. 3 -- -- -- 71.9 54.6 636.50 

P- 80 Mudstone 3138-WOM 3.0 4.9 -- -- -- 76.8 57.6 651.20 

P- 79 I Phosphate rock, argillaceous; fos. col. no. 48-JES-364 3137-WOM 1.3 18. 1 -- -- -- 33.4 58.9 674.73 

P- 78 Mudstone 3136-WOM 0.8 7. 0 -- -- -- 65.2 59.7 680.33 

P- 77 Mudstone;-fos. col. no. 48-JES-363 3135-WOM 2.4 2. 1 -- -- -- 80.5 62. 1 685.37 

P- 76 Mudstone, phosphatic 3134-WOM 0.5 10. 1 -- -- -- 53.4 62.6 690.42 

P- 75 Mudstone 3133-WOM 1.0 5. 5 -- -- -- 70.4 63.6 695.92 

::...:> 

U1 P- 74 Mudstone 3132-WOM 3.0 3. 1 -- -- -- 78.9 66.6 705.22 

P- 73 Mudstone, phosphatic 3131-WOM 0.9 8. 5 -- -- -- 63.2 67.5 712.87 

P- 72 Mudstone 3130-WOM 4.0 4. 8 -- -- -- 74.0 71. 5 732.07 

P- 71 Phosphate rock, argillaceous 3129-WOM 0.4 19.6 -- -- -- 42.7 71.9 739.91 

P- 70 Mudstone 3128-WOM 0.9 1.6 -- -- -- 83.5 72.8 741. 35 

P- 69 Che-rt 3127-WOM 0.7 3.0 -- -- -- 86.8 73.5 743.45 

P- 68 Mudstone 3126-WOM 2.0 1.2 -- -- -- 80.0 75.5 745.85 

P- 67 Chert 3125-WOM 5.0 0.5 -- -- -- 95.0 80.5 748.35 

P- 66 Mudstone, phosphatic 3124-WOM 0.6 13.9 -- -- -- 45.4 81. 1 756.69 

:P- 65 Chert · 3123-WOM 1.0 1.6 -- -- -- 91. 7 82. 1 758.29 

P- 64 Phosphate rock, argillaceous 3122-WOM 0.6 19.7 -- -- -- 35.7 82.7 770. 11 

P- 63 Mudstone 3121-WOM 1.7 10.5 -- -- -- 49.8 84.4 787.96 

P- 62 Mudstone 3120-WOM 4.2 3.6 -- -- -- 78.8 88.6 803.08 

P- 61 Mudstone 3119-WOM 3.4 2. 0 -- -- -- 79.5 92.0 809.88 

P- 60 Mudstone_, phosphatic 3118-WOM 0.7 16. 5 -- -- -- 47.4 92.7 821.43 

P- 59 j Mudstone; fos. col. no. 48-JES-362 3117-WOM 2. 2 2. 8 -- -- -- 80.0 94.9 827.59 

P- 58 Mudstone, phosphatic; fos. col. no. 48-JES-361 3116-WOM 2. 1 14.7 858.46 -- -- -- 51.4 97.0 

P- 571 Phosphate rock; fos. col. no. 48-JES-360 3115-WOM 0.7 26.7 -- -- -- 18. 5 97.7 877.15 

P- 56 Mudstone, phosphatic 3114-WOM 1. 4 8.4 -- -- -- 63.3 99.1 888.91 

P- 55 Mudstone, phosphatic; fos. col. no. 

48-JES-359 3113-WOM 0.9 10.6 -- -- -- 61.3 100.00 I 898.4~ 

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

Q;) 

Bed 

no. 

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 

Rock description 

Mudstone 

Phosphate rock, argillaceous 

Mudstone 

Mudstone 

Limestone, argillaceous, phosphatic; 

fos. col. no. 48-JES-358 

Mudstone, phosphatic; fos. col. no. 

48-JES-357 

Limestone, argillaceous; fos. col. no. 48-JES-356 

Mudstone, calcareous 

Mudstone, calcareoug 

Mudstone, calcareous 

Mudstone, calcareous 

Mudstone, calcareous, phosphatic; fos. 

col. no. 48-JES-355 

Mudstone, calcareous 

Limestone, argillaceous, phosphatic; 

fos. col. no. 48-JES-354 

Mudstone 

Limestone, argillaceous 

Mudstone, calcareous, phosphatic 

Mudstone and chert 

Mudstone and chert; fos. col. no. 

48-JES-353 

Mudstone 

Mudstone 

Mudstone, calcareous, phosphatic; 

fos. col. no. 48-JES-352 

Limestone, argillaceous 

Limestone 

Limestone, argillaceous, phosphatic; 

fos. col. no. 48-JES-351 

Phosphate rock, calcareous, argillaceous; 

fos. col. no. 48-JES-350 

Phosphate rock, calcareous, argillaceous; 

fos. col. no. 48-JES-349 

Phosphate rock, argillaceous, calcareous 

Phosphate rock, calcareous; fos. col. no. 

48-JES-348 

Phosphate rock, argillaceous, calcareous 

Phosphate rock, a,rgillaceous, calcareous 

Sample Thickness 

no. (feet) P205 

3112-WOM 1.1 1.9 

3111-WOM 0.5 18. 3 

3110-WOM 0.7 4.5 

3109-WOM 1. 5 3. 2 

3108-WOM 0.9 12.4 

3107-WOM 2.9 9. 3 

3106-WOM 1.5 3.9 

3105-WOM 4.0 2. 3 

3104-WOM 2.8 4.4 

3103-WOM 2.2 1.0 

3102-WOM 1. 1 7. 3 

3101-WOM 3.0 7. 8 

3100-WOM 3.3 7. 2 

3099-WOM 3.3 7. 8 

3098-WOM 1.7 6.0 

3097-WOM 1.6 0.6 

3096-WOM 0.8 8. 5 

3095-WOM 0.9 5. 8 

3094-WOM 0.6 5. 2 

3093-WOM 2.3 5. 0 

3092-WOM 2.0 7. 2 

3091-WOM 1.7 9.9 

3090-WOM 1. 0 7. 3 

3089-WOM 0.8 1.5 

3088-WOM 0.9 10. 7 

3087-WOM 0.7 19.2 

3086-WOM 1.5 20.8 

2860- DFD 0.6 17. 5 

1850- DFD 1.8 22.9 

1849- DFD 0.5 17.4 

1848- DFD 0.9 16.6 

Chemical analyses (percent) Cumulative Thickness x 

Al20 3 Fe2o3 

Loss on Acid thickness percent P 2 0 5 ignition insoluble (feet) (cumulative) 

-- -- -- 78.2 101. 1 900.54 

-- -- -- 33.9 101.6 909.69 

-- -- -- 72.9 102.3 912.84 

-- -- -- 61.6 103.8 917.64 

-- -- -- 32.5 104.7 928.80 

-- -- -- 43.6 107.6 955.77 

-- -- -- 35.3 109. 1 961. 62 

-- -- -- 60.0 113. 1 970.82 

-- -- -- 62.9 115.9 983. 14 

-- -- -- 73.2 118. 1 985.34 

-- -- -- 52.3 119. 2 993.37 

-- -- -- 51.5 122. 2 1, 016. 77 

-- -- -- 41.5 125. 5 1, 040. 53 

-- -- -- 38.7 128.8 1,066.27 

-- -- -- 60. 1 130. 5 1,076.47 

-- -- -- 38.6 132. 1 1,077.43 

-- -- -- 56.5 132.9 1,084.23 

-- -- -- 67.8 133.8 1,089.45 

-- -- -- 65.5 134.4 1, 092. 57 

-- -- -- 50.4 136. 7 1,104.07 

-- -- -- 57.4 138. 7 1, 118.47 

-- -- -- 42.7 140.4 1, 135.30 

-- -- -- 25.8 141.4 1; 142. 60 

-- -- -- 16.6 142.2 1, 143. 80 

-- -- -- 35.9 143.1 1, 153.43 

-- -- -- 23.6 143.8 1, 166. 87 

-- -- -- 20.0 145. 3 1, 198. 07 

-- -- -- 28.7 145.9 1, 208. 57 

-- -- -- 18.3 147.7 1,249.79 

-- -- -- 33.5 148.2 1,258.49 

-- -- -- 32.8 149. 1 1,273.43 
w 

.....::] 

P- Z3 Phosphate rock, argillaceous 

P- ZZ Phosphate rock, calcareous 

P- Zl Phosphate rock, calcareous 

P- ZO Phosphate rock, calcareous 

P- l9 Mudstone and calcareous phosphate rock 

P- 18 Phosphate rock, argillaceous 

P- 17 Phosphate rock, argillaceous 

P- 16 Mudstone, phosphatic 

P- 15 Mudstone, phosphatic 

P- 14 Mudstone 

P- 13 Phosphate rock 

P- 1Z Phosphate rock, argillaceous 

P- 11 Mudstone, phosphatic 

P- 10 Mudstone, phosphatic 

P- 9 Phosphate rock, argillaceous; fos. col. 

no. 48-JES-34 7 

P- 8 Phosphate rock, argillaceous; fos. col. no. 48-JES-346 

P- 7 Phosphate rock, argillaceous 

P- 6 Phosphate rock 

P- 5 Phosphate rock 

P- 4 Mudstone, phosphatic 

P- 3 Mudstone 

P- z Mudstone, calcareous 

P- 1 Phosphate rock 

Cw- 1 I Dolomite, argillaceous, calcareous 

Cw- Z Dolomite, calcareous, argillaceous 

1847- DFD 0.7 Z0.4 -- 1846- DFD 1. 1 Z5. 8 -- 1845- DFD 0.6 Zl. 9 -- 1844- DFD 1. 1 Z3.9 -- 1843- DFD 1.4 14.8 -- 184Z- DFD 0.5 17. 5 '- -- 3085-WOM 0.5 17. 5 -- 3084-WOM 1.0 10.4 -- 3083-WOM 3.5 8.4 -- 3082-WOM 1.1 z. 1 --

3081-WOM 0.7 Z9.0 -- 3070-WOM 1. 5 zo.s -- 3069-WOM 1.5 9.4 I -- 3068-WOM 1. 0 13. 5 --

3067-WOM Z.3 17. 1 --

3080- RH 0.8 19.8 -- 3079- RH 0.6 Z3. 5 -- 3078- RH z.z 32.7 1.4 

3077- RH Z.6 33.8 1.1 

3076- RH 0.6 13.8 -- 3075- RH Z.5 Z.4 -- 3074- RH 1.1 o. 7 

3073- RH 0.3 zs. 7 --

Wells formation-top beds only 

307Z- RH 

3071- RH 

-- -- -- -- -- -- -- -- -- --

-- -- -- -- -- -- -- -- -- --

-- -- -- -- -- -- -- --

-- --

-- -- -- -- 0.59 5.60 

o. 51 4.9Z 

-- --

-- --

-- -- -- --

Z9.5 

11.7 

16. 8 

16.8 

40.8 

36.Z 

36.9 

54.4 

63.6 

77.0 

17.0 

36.4 

59.7 

5Z.3 

44.8 

3Z. Z 

Z3.9 

6.3 

5. 1 

49. 7 

57.7 

58.0 

7. 5 

149.8 

150.9 

151.5 

15Z. 6 

154.0 

154.5 

155.0 

156.0 

159.5 

160.6 

161.3 

16Z.8 

164.3 

165.3 

167.6 

168.4 

169.0 

171. z 

173.8 

174.4 

176.9 

178.0 

178.3 

4.0 

6. 7 

1, Z87. 71 

1, 316. 09 

1, 3Z9. Z3 

1, 355. 52 

1, 376. Z4 

1,384.99 

1, 393. 74 

1,404.14 

1, 433. 54 

1, 435. 85 

1, 456. 15 

1, 487. 35 

1, 501. 45 

1, 514. 95 

1, 554. 28 

1, 570. 1Z 

1, 584. zz 

1, 656. 16 

1, 744. 04 

1, 75Z. 3Z 

1, 758. 3Z 

1, 759. 09 

1, 767. 70 

21. 60 

Z4.30 
w 

co 

BLOOMINGTON CANYON, IDAHO. LOT NO. 1272. 

Phosphatic shale member of Phosphoria formation cored in diamond drill hole no. 1 on north slope of Bloomington Canyon, sec. Zl, T. 14 s .. R. 43 E., Bear Lake County, Idaho, on west limb of Paris syncline. Beds strike NW; dip varies from o• to 20• E. Hole drilled in June and July 1948 

by U. S. Bureau of Mines, A. E. Long in charge. Core measured by R. H. Thurston, R. M. Campbell, R. A. Hoppin, R. L. Parker, D. F. Davidson, 

R. A. Gulbrandsen, D. A. Bostwick, and J. E. Smedley and sampled by Davidson. Samples analyzed for P 0 and acid insoluble by U.S. Bureau of 

of Mines Laboratory. Albany, Oregon, and for other constituents by Trace Elements Section Laboratory, lT. Sg. Geological Survey, Washington, D. C. 

Bed Sample Thickness Chemical analyses {percent} Cumulative Thickness x 

Rock description (feet} I I ,I Loss on I Ac1a thickness percent P 20f no. no. p 2°s Al203 Fe203 ignition insoluble {feet) {cumulative 

Phosphatic shale member of Phosphoria formation-top not cored 

P-187 Mudstone 801-RMC 2.3 3. 7 -- -- -- 72.5 2.3 8.51 

P-186 Mudstone 802-RMC 2.0 5. 4 -- -- -- 68.0 4.3 19.31 

P-185 Mudstone 803-RMC 3.5 1.5 -- -- -- 79.5 7. 8 24.56 

P-184 Mudstone and phosphate rock 804-RMC 0.4 16.4 -- -- -- 38.3 8. 2 31. 12 

P-183 Phosphate rock 805-RMC 0.3 33.2 -- -- -- 8. 9 8. 5 41.08 

P-182 Mudstone. phosphatic 806-RMC 0.7 32.5 -- -- -- 12.4 9.2 63.83 

P-181 Phosphate rock 807-RMC 0.6 9.8 83.33 

The P 20 5 and acid insoluble analyses represent a composite of samples 806-RMC and 807-RMC. 

P-180 Mudstone, phosphatic 808-RMC 0.6 16.4 -- -- -- 48. 1 10.4 93.17 

P-179 Phosphate rock, argillaceous 809-RMC 0.7 23. 1 -- -- -- 33.0 11. 1 109.34 

P-178 Mudstone, phosphatic 810-RMC 0.7 11.5 -- -- -- 57.6 11.8 117. 39 

P-177 Phosphate rock 811-RMC 1.0 35.9 0.83 0.33 3.34 5. 5 12. 8 153.29 

P-176 Phosphate rock, argillaceous 81a-RMC 0.4 26.5 4.2 1.2 5.38 22.0 13.2 163.89 

P-175 Core missing -- 0.4 -- -- -- -- -- 13.6 

P-174 Phosphate rock 813-RMC 0.4 23.9 4.8 0.94 6.64 28.1 14.0 9.56* 

P-173 Phosphate rock 814-RMC 0.4 5.4 l. 07 6.54 14.4 19. 12 

The P 2o5 and acid insoluble analyses represent a composite of samples 813-RMC and 814-RMC. 

P-172 Phosphate rock, argillaceous 815-RMC 0.8 26.5 2.4 o. 71 7. 12 22.7 15.2 40.32 

P-171 Core missing -- - o. 1 -- -- -- -- -- 15. 3 -- P-170 Phosphate rock 816-RMC 0.9 34.2 1. 3 0.32 5.00 7. 7 16.2 -- P-169 Core missing -- o. 1 -- -- -- -- -- 16.3 -- P-168 Phosphate rock 817-RMC 0.9 27.4 2.9 0.68 7. 72 19. 1 17.2 24.66* 

P-167 Phosphate rock, argillaceous 818-RMC o.s 23.9 5.3 0.46 . 8.44 28.2 17. 7 36.61 

P-166 Phosphate rock and phosphatic .... 

mudstone 819-RMC 0.9 31.6 2. 1 0.37 8.40 8. 7 18.6 68.21 

P-165 Core missing -- o. 1 -- -- -- -- -- 18. 7 -- P-164 Phosphate rock 820"7RMC 1. 0 34.8 1.1 0.39 8.60 1.5 19.7 --

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 
P-163 Core missing -- 0.4 -- -- -- -- -- 20.1 

P-162 Phosphate rock 821-RMC 1. 0 25.3 3.3 0.64 12.40 19. 1 21. 1 I 25.30* 

P-161 Phosphate rock and phosphatic 

mudstone 822-RMC 0.6 31.4 2.2 0,57 8,08 9.6 21. 7 44. 14 

P-160 Phosphate rock, argillaceous 823-RMC 1.0 23.9 3.7 1.1 13.84 20.5 22.7 68.04 

P-159 Mudstone, phosphatic 824-RMC 1.0 15.9 -- -- -- 41. 5 23. 7 83.94 

P-158 Phosphate rock 825-RMC 0,4 21. 7 -- -- -- 7. 8 24. 1 92.62 

P-157 Mudstone 826-RMC 0.4 6.4 -- -- -- 55.8 24.5 95. 18 

P-156 Mudstone 827-RMC 0.6 4. 5 -- -- -- 54. 7 25. 1 97.88 

P-155 Mudstone 828-RMC 0,3 7. 2 -- -- -- 45.6 25.4 100.04 

P-154 Mudstone 829-RMC 0.4 2. 2 -- -- -- 58.9 25.8 100.92 

P-153 Mudstone 830-RMC 0.4 1. 6 -- -- -- 60.8 26.2 101.56 

P-152. Mudstone 831- RLP 0.9 o. 8 -- -- -- 62.3 27. 1 102..28 

P-151 Mudstone 832-RLP 0.6 2. 5 -- -- -- 55.3 27.7 103.78 

P-150 Mudstone 833-RLP 0.4 6. 1 -- -- -- 50.6 28. 1 106.22 

P-149 Mudstone 834-RLP 1.1 2.. 0 -- -- -- 57.0 29.2 108.42 

P-148 Phosphate rock, calcareous 835-RLP 0.5 16.6 -- -- -- 19.5 29.7 116.72 

P-147 Phosphate rock, calcareous 836- JES 0.7 22. 1 -- -- -- 19. 1 30.4 132.19 

P-146 Phosphate rock 837- DAB 0.9 26.7 -- -- -- 15.8 31.3 156.22 

P-145 Phosphate rock 838- DAB 0.5 34.8 -- -- -- 5.6 31.8 173.62 

P-144 Phosphate rock 839- DAB 0.5 29.6 -- -- -- 5. 6 32.3 188.42 

w P-143 Phosphate rock, argillaceous 840- DAB 1. 5 14.9 -- -- -- 17.5 33.8 210.77 

(() P-142 Phosphate rock, argillaceous 841- DAB 0.8 13. 8 -- -- -- 17.4 34.6 221.81 

P-141 Phosphate rock, argillaceous 842-DAB 0.6 17. 1 -- -- -- 23. 1 35.2 232.07 

P-140 Phosphate rock, argillaceous 843- DAB 0.9 16.9 -- -- ... 17. 9 36. 1 247.28 

P-139 Core missing -- 1.9 -- -- -- -- -- 38.0 

P-138 Phosphate rock, argillaceous 844- DAB 1.8 16.6 -- -- -- 32.6 39.8 29.88* 

P-137 Phosphate rock, argillaceous 845-RMC 1.0 17. 1 -- -- -- 27.0 40.8 46.98 

P-136 Phosphate rock and mudstone 846-RMC 1. 0 16. 7 -- -- -- 31. 1 41.8 63.68 

P-135 Phosphate rock, argillaceous 847-RMC 1.0 16.4 -- -- -- 33.8 42.8 80.08 

P-134 Mudstone, phosphatic 848- RAH 2.4 7. 8 -- -- -- 61. 1 45.2 98.80 

P-133 Mudstone, phosphatic 849-RAH 0.4 14.9 -- -- -- 39.9 45.6 104.76 

P-132 Phosphate rock, argillaceous 850-RAH 0.4 16. 5 -- -- -- 35.8 46.0 111.36 

P-131 Mudstone, phosphatic 851-RAH 0.9 12. 7 -- -- -- 49.0 46.9 122.79 

P-130 Mudstone 852-RAH 1.1 6. 6 -- -- -- 63.8 48.0 130.05 

P-129 Mudstone 853-RAH 1.8 5. 5 -- -- -- 66.9 49.8 139.95 

P-1Z8 Mudstone, phosphatic 854- RAH 1.0 11.6 -- -- -- 52.6 50.8 151. 55 

P-12.7 Mudstone, phosphatic 855-RAH 0.9 8. 6 -- -- -- 68.0 51.7 159.29 

P-126 Mudstone, phosphatic 856-RAH 1. 1 9. 7 -- -- -- 67.6 52.8 169.96 

P-125 Mudstone, phosphatic 857- RAH 1.1 9. 7 -- -- -- 60.9 53.9 180.63 

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 

* Cumulative data in 
~ 

0 

Bed 

no. 

P-1Z4 

P-1Z3 

P-1ZZ 

P-1Z1 

P-1ZO 

P-119 

P-118 

P-117 

P-116 

P-115 

P-114 

P-113 

P-llZ 

P-111 

P-110 

P-109 

P-108 

P-107 

P-106 

P-105 

P-104 

P-103 

P-10Z 

P-101 

P-100 

P- 99 

P- 98 

P- 97 

P- 96 

p ... 95 

P- 94 

p .. 93 

P- 9Z 

P- 91 

P- 90 

P- 89 

Sample Thickness Chemical analyses (percent) 

Rock description no. (feet) PzOs Al2o3 Fe2o3 

Loss on Acid 

ignition insoluble -. 

Core missing -- 1.0 -- -- -- -- -- Mudstone 858- RAH 1.3 5. 9 -- -- -- 70,8 

Mudstone 859-RAH 1.0 6. z -- -- -- 66.5 

Mudstone 860-RAH 1.1 z. 9 -- -- -- 81.6 

Core missing -- 1.1 -- -- -- -- --

Mudstone 861- RLP 0.5 o. 7 -- -- -- 86.7 

Core missing -- o.z -- -- -- -- -- Mudstone 86Z-RLP 1. 5 - 6. 4 -- -- -- 66.Z 

Phosphate rock, argillaceous 863- RLP 1. 0 Zl. 1 -- -- -- 30.7 

Core missing -- o.z -- -- -- -- --

Mudstone 864-RLP 1.5 5.4 -- -- -- 67.6 

Mudstone 865-RLP 1, 0 z. 5 -- -- -- 76. 1 

Mudstone, phosphatic 866-RLP 0.5 13.6 -- -- -- 4Z.O 

Mudstone 867-RLP l.Z 3. 7 -- -- -- 70,0 

Core missing -- o.z -- -- -- -- -- Mudstone, phosphatic 868- JES 1. 1 z. 5 -- -- -- 75.5 

Mudstone and cherty phosphate rock 869- JES 0.8 18.6 -- -- -- 77.6 

Mudstone 870- JES l.Z z. 0 -- -- -- 86.6 

Chert 871- JES 1.6 0.6 -- -- -- 97.4 

Chert 87Z- JES 0.8 o.z -- -- -- 97.Z 

Chert 873-RLP 0. Z) -- -- -- -- -- Core missing -- 0.8 -- -- -- -- -- Chert 874-RLP o. 6) o. 5 -- -- -- 96.5 

Core missing -- Z.4 -- -- -- -- -- Chert 875-RLP o. 1) -- -- -- -- --

The P 2o5 and acid insoluble analyses represent a composite of samples 873-RLP, 874-RLP, and 875-RLP. 

Core rrdssing -- 0.9 -- -- -- -- -- Chert 876-RLP 0,5 0,6 -- -- -- 96.3 

Core missing -- o. 1 -- -- -- -- -- Chert 877-RLP 0.4 0.6 -- -- -- 96.9 

Core missing -- 0.7 -- _,.. -- -- --

Chert 878-RLP 0.5 o. 6 -- -- -- 96.5 

Core missing -- 3.0 -- -- -- -- -- Mudstone and argillaceous phosphate 

rock 879- RAG 0.8 8.7 -- -- -- 59.0 

Core missing -- o.z -- -- -- -- -- Phosphate rock 880-RAG 0,8 33.8 -- -- -- 8.3 

Phosphate rock and mudstone 881-RAG 0.6 10.3 -- -- -- 58.7 

"' 

Cumulative Thickness x 

thickness percent P 0 

(feet) (cumulatifef 

54.9 -- 56.Z 7.67* 

57. z 13.87 

58.3 17.06 

59.4 --

59.9 -- 60.1 -- 61.6 -- 6Z.6 -- 6Z.8 -- 64.3 8.10* 

65.·3 10.60 

65.'8 17.40 

67.0 Z1.84 

67.Z 

68.3 Z,75* 

69. 1 17.63 

70.3 Z0.03 

71.9 Z0.99 

7Z.7 Zl. 15 

7Z. 9 -- 73. 7 -- 74.3 -- 76. 7 -- 76.8 --

77. 7 -- 78.Z -- 78,3 -- 78.7 -- 79.4 --

79.9 -- 8Z.9 -- 83.7 -- 83.9 -- 84. 7 Z7.04* 

85.3 33.ZZ 
P- 88 Mudstone 88Z- RAG 0.6 z. 7 -- -- -- 79.5 85.9 34.84 

P- 87 Mudstone 883- RAG 1.7 o. 7 -- -- -- 80.6 87.6 36.03 

P- 86 Core missing -- o.z -- -- -- -- -- 87.8 

P- 85 Mudstone 884-RAG Z.8 Z.4 -- -- -- 78.6 90.6 6.7Z* 

P- 84 Phosphate rock 885- RAG o.z 30.6 -- -- ' 11.3 90.8 12.84 

P- 83 I Mudstone 886- RAG 0.5 8. 6 -- -- -- 59.6 91.3 17. 14 

P- 8Z Phosphate rock, argillaceous 887-RAG o. 1 91.4 18.00 

The P 20 5 and acid insoluble analyses represent a composite of samples 886-RAG and 887-RAG. 

P- 81 Core missing -- o.z -- -- -- -- -- 91.6 

P- 80 Mudstone 888-RAH 1.7 1.0 -- -- -- 80.Z 93.3 

P- 79 Mudstone 889- RAH 1.6 z. 3 -- -- -- 77.0 94.9 

P- 78 Core missing -- o.z -- -- -- -- -- 95. 1 

P- 77 Mudstone and phosphate rock 890-RAH 1. 0 Z6.3 -- -- -- Zl. 0 96. 1 

P- 76 Mudstone 891-RAH 0.7 z. 8 -- -- -- 73.9 96.8 

P- 75 Core missing -- 1.0 -- -- -- -- -- 97.8 

P- 74 Mudstone 89Z-RAH 0.5 1.1 -- -- -- 79.4 98.3 

P- 73 Core missing -- o. z -- -- -- -- -- 98. 5 

P- 7Z Mudstone, phosphatic 893-RAH 0.65 9. 9 -- -- -- 56.9 99. 15 

P- 71 Core mis~ing -- 0.15 -- -- -- -- -- 99.30 

P- 70 Mudstone 894- RAH 1. z 4.9 -- -- -- 70.9 100.50 5.88* Jot>. 

,_. P- 69 Mudstone 895- RAH 1. 3 1. 3 -- -- -- 81.0 101.80 7.57 

P- 68 Phosphate rock 896-RLP o.z 31. 5 -- -- -- 11.0 10Z.OO 13.87 

P- 67 Mudstone, phosphatic 897- RAH l.Z 9.0 -- -- -- 73.5 103.ZO Z4.67 

P- 66 Phosphate rock 898-RAH 0.7 3Z.O -- -- -- 9.4 103.90 47.07 

P- 65 Mudstone, phosphatic 899-RAH o.z 1Z. 5 -- -- -- 5Z.1 104. 10 49.57 

P- 64 Phosphate rock, argillaceous 900-RAH 0.3 zs. 9 -- -- -- ZZ.6 104.40 57.34 

P- 63 Core missing -- 0.6 -- -- -- -- -- 105.00 

P- 6Z Phosphate rock, argillaceous 901-RAH 0.7 zo.o -- -- _ .. 33.9 105.70 14.00* 

P- 61 Mudstone and phosphate rock 90Z-RAH 1.7 8. 3 -- -- -- 67.3 107.40 Z8. 11 

P- 60 Mudstone 903- RAH 1. 5 3. 3 -- -- ""- 7Z.1 108.90 33.06 

P- 59 Mudstone 904-RAH 1.4 6.Z -- -- -- 69.9 110.30 41.74 

P- 58 Mudstone and phosphate rock 905-RHT 0.9 14.8 -- -- -- 40.3 111. zo 55.06 

P- 57 Mudstone, phosphatic 906- RHT 3.4 8.9 -- -- -- 49.9 114.60 85.3Z 

P- 56 Mudstone 907-RHT o.z z. 6 -- -- .... 69.9 114.80 85.84 

P- 55 ~udstone, phosphatic 908-RHT 0.6 14. 3 -- -- -- 37.4 115.40 94.4Z 

P- 54 Mudstone 909-RHT o. 1 115. 50 95.85 

The P 2o5 and acid insoluble analyses represent a composite of samples 908-RHT and 909-RHT. I 

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 
~ 

M 

Bed 

no. 

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 

Rock descriptiQ,n 

Mudstone, phosphatic 

Mudstone, phosphatic 

Core missing 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Mudstone, phosphatic, calcareous 

Mudstone, phosphatic 

Mudstone, phosphatic 

Core missing 

Mudstone, phosphatic, and calcareous 

mudstone 

Mudstone, phosphatic, calcareous 

Mudstone 

Mudstone 

Mudstone, calcareous, phosphatic 

Core missing 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic, calcareous 

Mudstone, phosphatic 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone, phospha\ic 

Phosphate rock, argillaceous 

Phosphate rock and mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone, phosphatic 

Sample Thickness 

no. (feet) Pz05 

910- RHT 1.4 12.4 

911- RHT o.z 8. 5 

-- 0.5 -- 912- RHT 0.5 9.4 

913- RHT 0.8 7.4 

914- RHT 0.8 9.3 

915- RHT 0.6 8.6 

916- RHT 0.8 8.6 

917- RHT 1.4 4.3 

918- RH'r 0.5 0.9 

919- RHT 0.2 1.4 

920- RHT 1.6 5.4 

921- RHT 1.2 3.3 

922- RHT 0.2 3.9 

923- RHT 0.4 6.6 

924- RHT 0.2 6.8 

925- RHT 2.0 3.0 

926- DFD 2.5 9.8 

927- DFD 2.0 9.6 

928- DFD 1.2 12.3 

-- 0.4 -- 929- DFD 3.3 1 o. 6 

930- DFD 1. 2 10.9 

931- DFD 2.8 7. 2 

932- DFD 1. 5 7. 5 

933- DFD 0.9 9.8 

-- 1.5 -- 934- DFD 0.7 8. 1 

935- DFD 2.2 13.4 

936- RHT 0.6 5. 6 

937- RHT 0.8 11.7 

938- RHT 1. 0 10.6 

939- RHT 0.4 12. 0 

940-RHT 3.5 17. 9 

941- RHT 0.3 14.7 

942- RHT 2.0 18.3 

943-RHT 2. 6 19.4 

944-RHT 0.6 16.6 

945- RHT 1. 9 1 o. 6 

946- RHT 6.0 9. 1 

Chemical analyses (percent) Cumulative Thickness x 

Al2o3 Fe2o3 

Loss on Acid thickness. percent P 20 5 ignition insoluble {feet) (cumulative) 

-- -- -- 37.3 116.90 113.21 

-- -- -- 46.3 117.10 114.91 

-- -- -- -- 117.60 ----- -- -- -- 52.6 118.10 4.70* 

-- -- -- 50 • .,2 118.90 10.62 

-- -- -- 48.8 119. 70 18.06 

-- -- -- 49.9 120.30 23.22 

-- -- -- 57.7 121.10 30.10 

-- -- -- 62.6 122. 50 36.12 

-- -- -- 71. 5 123.00 36.57 

-- -- -- 71. 2 123.20 36.85 

-- -- -- 60.8 124.80 45.49 

-- -- -- 65.6 126.00 49.45 

-- -- -- 68.8 126.20 50.23 

-- -- -- 57.7 126.60 52.87 

-- -- -- 65.2 126.80 54.23 

-- -- -- 68.6 128.80 60.23 

-- -- -- 49.3 131.30 84.73 

-- -- -- 49.7 133.30 103.93 

-- -- -- 44.3 134.50 118.69 

-- -- -- -- 134.90 --

-- -- -- 47.6 138.20 34. 9.8* 

-- -- -- 51.7 139.40 48.06 

-- -- -- 58.0 142.20 68.22 

-- -- -- 51.0 143.70 79.47 

-- -- -- 46.0 144.60 88.29 

-- -- -- -- 146.10 -- -- -- -- 61.8 146.80 5.67* 

-- -- -- 39.7 149.00 35.15 

-- -- -- 69.7 149.60 38.51 

-- -- -- 47.-0 150.40 47.87 

-- -- -- 46.5 151. 40 58.47 

-- -- -- 51.3 151.80 63.27 

-- -- -- 30.4 155.30 125.92 

-- -- -- 43.7 155.60 130.33 

-- -- -- 26.7 157.60 166.93 

-- -- -- 37.8 160.20 217.37 

-- -- -.- 46.1 160.80 227.33 

-- -- -- 59.4 162.70 247.47 

-- -- -- 63.2 168.70 302.07 
~ 

(.C) 

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 

Cw• Z 

Cw- 3 --

Phosphate rock, argillaceous 947-RHT 1. 2 27.4 2.2 0.55 3.98 24.8 

Phosphate rock and mudstone 948-RHT 2.0 23. 3 4.9 1.4 4.20 30.7 

Mudstone 949- RHT 0.7 6. 2 9.3 3.2 4.62 69.0 

Phosphate rock, argillaceous 950-RHT 1. 2 17. 9 6.6 1. 5 4.44 43.3 

Mudstone, phosphatic 951- RHT 0.9 8. 6 9. 8- 2.6 3.84 33.4 

Mudstone and phosphate rock 952-RHT 5.4 21.1 4.6 1.3 3.90 37.3 

Core missing -- 1. 4 -- -- -- -- -- Mudstone, phosphatic 953-RHT 0.7 12.3 9.8 3.2 4. 58 52.9 

Phosphate rock, argillaceous 954-RHT o. 5 20.5 5.6 1.3 4.60 34.9 

Core missing -- s.o -- -- -- -- --

}\{udstone 955- RHT 7. 0 s. 8 -- -- -- 68.4 

Limestone breccia, argillaceous 956- RHT 0.5 1. 3 -- -- -- 41.5 

Phosphate rock and chert 957- RHT 5.9 24.9 -- -- -- 27.3 

Wells formation-top beds only 

Limestone, argillaceous 958-RHT 1. 0 o. 4 -- -- -- 37.3 

Limestone and sandstone 959- RHT 6.7 1. 4 -- _ ... -- 53.9 

Limestone breccia, cherty 960-RHT I. 6 o. 8 -- -- -- 68.3 ------------~ 

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 

** Note incompleteness of cumulative data. 

169.90 334.95 

171. 90 381.55 

172.60 385.89 

173.80 407.39 

174. 70 415.13 

180. 10 529.07 

181.50 

182. 20 -- 182.70 -- 187. 79 -- 194. 70 40.60* 

195.20 41.25 

201.10 188. 16** -~-

1. 0 0.40 

7. 7 9.78 

9.3 11.06 - -~------------

• 

Ill'l'.-DUP. SIC .• lASH .• D.Citi"IIJ 
..