GEOLOGICAL SURVEY CIRCULAR 208 

STRATIGRAPHIC SECTIONS OF THE 

PHOSPHORIA FORMATION IN 

IDAHO, 1947-48, PART I 

By V. E. McKelvey, D. F. Davidson, F. W. O'Malley, and L. E. Smith 

vo 

UNITED STATES DEPARTMENT OF THE INTERIOR 

Douglas McKay, Secretary 

GEOLOGICAL SURVEY 

W. E. Wrather, Director 

GEOLOGICAL SURVEY CIRCULAR 208 

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION 

IN IDAHO, 1947-48, PART t 

By V. ·E. McKelvey, D. F. Davidson, F. W. O'Malley, and L. E. Smith 

This report concerns work done partly on behalf of the 

U. 8. Atomic Energy Commission 

and is published with the permission of the Commission. 

Washington, D. C., 1953 

Free on application to the Geological Survey, Washington 25, D. C. 

CONTENTS 

Introduction .....•........................................................................ 

Acknowledgments ...................................................................•. 

Field and laboratory procedures .......................................................... . 

Preparation of sections for description and sampling .................................... . 

Measurement and description of strata ...........................................•.•.... 

Collection of samples ...•.....•...........................................•........... 

Treatment and analysis of samples .................................................... . 

Interpretation of chemical data ...................•.........•........................•...... 

Classification and nomenclature of rocks of the Phosphoria formation ......................... . 

Stratigraphy of the Phosphoria formation in southeastern Idaho ....................•........... 

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

References .......................................•...............................•.....•. 

Tables of stratigraphic sections 

Diamond drill hole 8, Fort Hall mine ...............................................•.•. Diamond drill hole 9, Fort Hall mine ...............................................•... 

Caldwell Canyon ...............................................................•...... Mabie Canyon ....................................................................... . 

Spectrographic analyses .......................................................... . 

Conda .............................................................................. . 

Spectrographic analyses ...........................•.................•............. 

Diamond drill hole 6, Slug Creek Valley ...............................•................. 

Diamond drill hole 3, Middle Sulphur Canyon ........................•................... 

Diamond drill hole;4, Middle Sulphur Canyon ...............................•............ 

Diamond drill hole 5, South Fork of Johnson Creek ........•.............................. 

North Dairy .....•.....................•.............................................. 

Swan Lake Gulch ....................................................•..........••..... 

Deer Creek ..................... _ .........................................•........... 

ILLUSTRATIONS 

Plate 1. Phosphoria formation outcrops in Idaho and localities sampled for phosphate ..•....•.. 

Figure 1. Phosphoria outcrops and sample localities of inset area on plate 1 ........•.......... 

Z. Generalized typical section of Phosphoria formation in southeastern Idaho ••......•... 

Lot no. Page 

1 

1 

3 

3 

3 

3 

3 

3 

4 

6 

6 

6 

1Z79 7 

1Z80 9 

1Z60 11 

1Z10 14 

zo 

1ZOO Z5 · 

30 

1Z77 34 

1Z74 36 

1Z75 37 

1Z76 38 

1ZlZ 39 

1Z65 42. 

1Z68 46 

Faces 1 

2. 

5 

UNITED STATES DEPARTMENT OF THE INTERIOR 

GEOLOGICAL SURVEY CIRCULAR 208 PLATE 1 

44° 

0 51 

·· . 

. --·· 

/..., oi 

,At 24 6-7 

~~ON 

EXPLANATION 

Outcrop of Phosphoria formation, 

dotted wh ere questionable 

---10 

112° 

,,.,~r:,., I 

I 

I 

I "' ' I I '-t 

IJJO 

0~ ~-----------+--------------------~~~--------~~~------------~~ 440 Location and lot number of samp le 

loc ality included in thi s report 

0 1243 

Location and lot number of sample 

locality to be included in later reports 

---~-' D A H O_l ___ . .._ UTAH 

~~ 1 353 

-. ~ 1266 

1272 

t

1 293 

1 3 17 

.,. 

.. 

I 

I 

I 

I 

I 

I 

I 

I 

I 

I 

----J Recompiled and modified from Clabaugh. 1946 

(!) 

::z: 

-

~ 

C> 

>-

3= 

43° 

PHOSPHORIA FORMATION OUTCROPS IN IDAHO 

AND LOCALITIES SAMPLED FOR PHOSPHATE 

lEODo::::!;;;r:os::::s:io;.....,..,..,..,.,lf:O::~ =====2=>0"=======,;3;o:O====='=i40 Miles 

STRATIGRAPHIC SECTIONS OF THE PHOSPHORIA FORMATION 

IN IDAHO, 1947-48, PART I 

INTRODUCTION 

The Permian Phosphoria formation of the western 

states contains one of the world' s largest reserves of 

phosphate. Although previous investigations (see especially Mansfield, 1927), including reconnaissance geologic mapping and sampling, established the location of 

most of the important deposits and their quality at scattered localities, they were not sufficiently detailed to 

permit a comparison of the merits of individual deposits 

or an appraisal of the reserves of phosphate rock that 

might be available under present economic conditions. 

Because the growing importance of the western phosphate deposits requires a better, more detailed understanding of their distribution and quality, the Geological 

Survey began in 194 7 a comprehensive investigation, 

including (1) reconnaissance geologic mapping, mostly 

in Montana, of areas in which the Phosphoria formation 

could occur but where it had not previously been looked 

for or found; (2) geologic mapping, mostly in Montana, 

at a scale no smaller than 1:62,500, of several areas 

known to contain the Phosphoria formation but not previously mapped except in reconnaissance fashion: (3) Geologic and topographic mapping, at a scale of 1:12,000, 

of some of the richest, thickest, and most accessible 

deposits; (4) measuring, describing, and sampling all 

beds of the phosphatic and shaly parts, and in some 

places the full thickness, of the Phosphoria formation 

and its stratigraphic equivalents at one or two localities 

per township over the entire field; (5) chemical and 

spectrographic analysis of the samples for phosphate, 

fluorine, minor metals, oil, and rock-forming constituents; and (6) petrologic and geochemical studies 

of the rocks and minerals of the formation. 

These studies are designed to define the regional 

and local geologic structures in which the phosphate 

beds lie, to provide a basis for the estimation of reserves of the inferred class over the entire region, and 

to determine the origin of the rocks and the elements 

contained in them. The data collected are not of the 

detail required to plan actual mining operations, but it 

is hoped they will guide industry in the selection of individual deposits worthy of further exploration. 

Most of the field work contemplated as a part of 

this investigation is now completed. Although the data 

will not be compiled or published in final form for some 

years to come, segments of the data, accompanied by 

little or no interpretation, will be published as preliminary maps or reports as they are assembled. The 

present report is the first of a series presenting in abbreviated form the descriptions and analyses of the 

beds measured and sampled at various localities in 

southeastern Idaho (pl. 1). Companion reports presenting segments of the data from Montana, Wyoming, 

and Utah (Swanson and others, 1953, McKelvey, and 

others, 1953, and Smith and others, 1953) are being 

released at the same time as this report, and others are in preparation. 

A large number of people have taken part in this 

investigation. In addition to the authors, F. C. Armstrong, R. P. Sheldon, R. M. Campbell, R. A. 

Gulbrandsen, R. A. Hoppin, D. M. Larrabee, 0. A. 

Payne, R. S. Sears, R. A. Smart, R. G. Waring, 

and R. A. Weeks participated in the description of the 

strata and collection of the samples 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 collection, crushing, 

and splitting of samples in the field. The diamond 

drilling described in this report was undertaken for 

the Geological Survey as a cooperative project by the 

U. S. Bureau of Mines. This drilling was under the 

supervision of A. E. Long (1949). 

The laboratory preparation of samples for chemical analysis was done under the direction of W. P. 

Huleatt (1950), who also designed a crushing and splitting apparatus for field use. The analyses for P 20 5 and acid insoluble and most of those for Al20 3, Fe2o 3

, 

and loss on ignition were made for the Survey by tfie 

Bureau of Mines at the Northwest Electrodevelopment 

Laboratory, Albany, Oreg., under the direction of 

S. M. Shelton and M. L. Wright. The spectrographic 

analyses in the Bureau of Mines laboratory were prepared by D. M. Mortimer. Analytical work by the 

Geochemistry and Petrology Branch of the Geological 

Survey has been done under the direction of J. C. 

Rabbitt by chemists I. Barlow, A. Caemmerer, J. 

Greene, N. Guttag, and E. H. Humphrey. 

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

Sheldon and F. D. Frieske under the supervision of 

R. W. Swanson. Organization of the tabular data has 

been largely by Anita Cozzetto. 

Acknowledgments 

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

Williams, and A. E. Weissenborn who have given 

much advice in planning and organizing the field program. 

The cost of both the field and laboratory investigations has been partly borne by the Division of 

Raw Materials of the Atomic Energy Commission. 

This support is gratefully acknowledged. 

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 Anaconda Copper Mining 

Company; D. L. King of the San Francisco Chemical 

Company; and G. A. McHugh and H. B. Fowler of the 

Simplot Fertilizer Company have been especially 

helpful in this connection. 
1110 !0' 

1309 

QSODA SPRINGS 

1308 .._ ... 

J 

1314 \ 

"\0~~ 

\ ,1316 " \ 123~" ~ ~ 1232 

, 

" "\,1261 

r~ 12o6 • 

l

,\ -.!IJ 

' ~ 1276 

"" 

f1274-75 .... r~ 

JIJOJS' 

' 

-~ ~~ 

~: -,., .. , 

~ 

\ 

... 1212 1211 

1208 • 

• 

( 

EXPLANATION 

---- Outcrop of Phosphoria formation 

01276 

Location and lot number of sample 

locality included in this report 

o1262 

Location and lot number of sample 

locality to be included in later reports 

5 0 10 Miles Cl ~--~~--~~~~~~======~• 

) 

J\)1310 

INDEX MAP 

r····. 

I 

i 

I 

01. (.!) 

:l:~ 

c:x:E 

010 

-i~ I 

i 

t • 

I 

• I I 

I 

I 

• I 

Figure 1.-- Phosphoria outcrops and sample localities of inset area on plate 1 

2 
FIELD AND LABORATORY PROCEDURES 

The field and laboratory procedures followed 

in these investigations and the definitions of the lithologic terms adopted throughout the work, particularly 

insofar as they bear upon the interpretation of the data 

presented, are described in some detail in this report 

but will be omitted or only summarized in subsequent 

ones. 

Preparation of Sections for Description and Sampling 

Natural exposures of the phosphatic shale 

member of the Phosphoria formation are rare. Most 

of the sections measured, therefore, have been exposed 

artificially, generally by bulldozer but in some places 

by hand-trenching. The trenches, which range from 

5 to as much as 30 feet in depth and from 200 to 500 

feet in length, have been located mostly on steep slopes 

containing a minimum of foreign talus and abundant 

fragments of phosphate rock and in areas where the 

regularity of outcrops of adjacent formations and the 

covered interval between them indicated little or no 

structural complication. Despite these precautions, 

part if not much of the phosphatic shale proved too 

deeply buried to expose at several localities; the rocks 

exposed at most localities are weathered and in some 

places physically distorted or displaced by creep; and 

at some localities parts of the section are repeated or 

omitted by faults not recognizable at the surface. For 

these reasons the thicknesses measured do not everywhere represent the true thickness of the rocks, and 

the samples collected and analyzed are not wholly 

representative of the rocks at depth. 

A few sections were obtained by diamond 

drilling undertaken by the Bureau of Mines in cooperation with the Geological Survey in an effort to 

develop a means of coring the Phosphoria formation. 

The engineering results of this experimental drilling 

have been described in another report (Long, 1949}. 

Measurement and Description of Strata 

The full thickness, or such of it as could be 

exposed, of the phosphatic member of the Phosphoria 

formation has been described and sampled at each 

locality~ In addition the entire formation has been 

described, and in some places sampled as well, at 

selected localities to provide information on other 

constituents besides the phosphate and to provide 

stratigraphic information for correlation purposes. 

Each lithologic unit greater than 0. 5 foot in 

thickness has been described and sampled separately 

(a few thinner units have been described and sampled 

as well}, and units greater than 5 feet in thickness 

have been divided into two or more parts, except in 

nonphosphatic parts of the formation where some 

thicker units have not been subdivided. For identification purposes, each locality has been assigned a 

lot number, each bed described a bed number, and 

each bed sampled a sample number. 

Because many people have participated in the 

measurement and description of the beds,. it has been 

necessary to standardize the terminology used in the 

work in order to achieve uniform results. This has 

been achieved mainly through the use of prepared 

forms or tables with spaces in which to record for 

each unit its bed number, sample number, field 

name, thickness, texture, grain size, hardness, 

thickness of bedding, presence of fossils, mineralogy, 

reaction to hydrochloric acid, color, jointing, and 

nature of contact with the underlying unit. In order 

that field descriptions could be augmented by 

laboratory petrographic studies, one or more chip 

samples have been collected from each unit. Only a brief abstract of this field description--bed and 

sample numbers, rock name, and bed thickness--

3 

is presented here, but most of the remaining data 

will be presented later. 

Collection of Samples 

Channel or bench samples have been collected 

from each unit over the full thickness of the phosphatic 

member of the Phosphoria formation and, in a few 

places, over the entire formation. The minimum 

weight of the samples is 12 pounds, but the average 

weight of those collected from the sections described 

in this report is about 35 pounds. 

Treatment and Analysis of Samples 

All samples have been crushed to minus !-inch 

mesh and reduced to 10 pounds in a field laboratory 

established at Montpelier~ Idaho, using a combination 

jaw crusher and Vezin-type splitter designed by 

W. P. Huleatt (1950}. The crushed samples have been 

split into two parts at the Geological Survey samplepreparation laboratory in Denver--one stored with no 

further treatment and the other ground to minus 20-

mesh. From the latter, two 4-ounce splits have been 

cut and ground to minus 80-mesh for chemical analysis. 

Powders for spectrographic analysis also have been 

prepared in the Survey's Denver laboratory. 

All samples have been analyzed for P 20 5 and 

acid insoluble by methods essentially the same as those 

described by Hoffman and Lundell (1938}. In addition 

all samples from a few localities have been analyzed 

for Al2o3, Fe2o3

, V 20 5 , and loss on ignition, and 

semiquantitatively spectrographed for Al, Ba, B, 

Ca, Cr, Co, Cu, Fe, Pb, Mg, Mn, Mo, Ni, Si, Ag, 

Na, Sr, Ti, V, Zn, and Zr and, in a large percentage 

of the samples, for nearly 20 additional elements including Sb, As, Be, Bi, Cd, Cb, Ga, Ge, Au, In, Li, 

Hg, Pt, Ta, Sn, and W. Most samples representing 

a thickness of more than 3 feet and a P 20 5 content in excess of 30 percent or a thickness of more 

than 10 feet and a P 20 5 content in excess of 20 percent have been analyzeil for Al20 3, Fe2o3, and loss 

on ignition, and most of these same samples have 

been spectrographed for the constituents listed above. 

Some of these samples have also been analyzed for F 

or V 20 5. 

A small percentage of the analyses of the samples 

reported here are not yet available. They will be 

presented in later reports. 

INTERPRETATION OF CHEMICAL DATA 

Nearly all the phosphate is in carbonatefluorapatite, which has a composition of about 

9Ca0. 3P 2 05.. CaF 2. C02 • H2 0. The percentage of 

P 20 5 murtiplied by 2. 515, tfi.erefore, gives the approxlmate percentage of the phosphate mineral. The 

percentage of tricalcium phosphate, 3Ca0. P 20 5 , or 

bone phosphate of lime (B. P. L.} as it is called in 

the phosphate industry, may be calculated by multiplying the percentage of P 20 5 by 2. 18. 

Acid-insoluble. content may be determined by a 

variety of procedures that yield widely different results. In the analyses reported here, the acid-insoluble content represents that portion of the rock not 

soluble in aqua regia and not ignitable or volatile at 

about 1000 ° C. The acid-insoluble fraction consists 

principally of silica, but it generally also includes 

10-30 percent of the total iron oxide, alumina, and· 

ti tania and a generally negligible percentage of 

phosphate, magnesia, lime, and several minor metals 

such as zirconium. Mineralogically it may be taken 

as an approximate index of the total amount of detrital 

minerals in the rock; the fact that some of the detritals 

may have been partially dissolved by the acid treatment is counterbalanced by the fact that many rocks 

contain some secondary chert. Attention is called to 
the fact that the acid-insoluble residue determined in 

this fashion includes little if any carbonaceous matter. 

That portion of the rock not in carbonatefluorapatite or acid insoluble, that is, A. I. +(P 20 5 x z. 56), includes the CaO and COz... not in fluorapatite as 

well as nearly all the MgO, Na2u, K 20, so3, organic 

matter, and minor metals sucli as vanadium, chromium, nickel, zinc, etc. (even some of the zirconium is 

in acid-soluble form); it also includes all the Fe2o3 , 

Al20 3, and Ti02 that would be reported in separate 

analyses for these constituents (only soluble iron, 

alumina, and titania are generally reported). Mineralogically this portion of the rock consits mainly of 

calcite and dolomite; pyrite, marcasite, and other iron 

sulfides; limonite, hematite, and other iron oxides; 

iron sulfates and gypsum; and organic matter. The 

minerals containing the soluble alumina, alkalis, and 

minor metals are as yet poorly defined, but they seem to be mainly of the hydromica type. 

Loss on ignition includes chiefly carbonate C02, 

organic matter, and water. It may also include some sulfur, depending upon the minerals present in the 

rock and the temperature reached during ignition. 

Loss on ignition may be taken as a rough measure of 

the organic-matter content if the rock contains no 

carbonates and little or no clay or if CO and water 

have been determined and can be subtra~ed from the 

loss on ignition. 

An accurate total of all constituents is extremely 

difficult to obtain, even when all the constituents 

present, and this may include 30 or 40, are determined. 

This partly because the accurate determination of 

many constituents in phosphate rock is extremely 

difficult and partly because the state of oxidation of 

many of the elements is not known. Thus, iron is 

generally reported as Fe2o3 but it may actually be present 

as FeO, FeS2, etc. ; vanadium is reported as V z.05 but 

may be present as V 20 3; and sulfur is reportea as so] but is known to be present as organic, sulfide, 

and sulfate compounds. The same uncertainty applies to several other elements, particularly metals. 

Because nearly all stratigraphic sections were measured and sampled at or near the surface, the 

analyses reported here are of partly weathered rocks. 

Aside from physical disintegration, the principal 

effects of weathering of Phosphoria formation rocks 

are progressive oxidation of organic matter and 

leaching of more soluble constituents. 

In advanced stages of weathering, such as are found where the rocks immediately underlie the 

weathering surface developed prior to the deposition 

of the Tertiary Wasatch formation, the organic 

matter is so completely oxidized and removed that 

the rocks are white, light gray, or pink in color. 

Relatively soluble constituents, including calcium 

carbonate and minor metals like vanadium, are 

leached out, so that only the more insoluble con- stituents remain. 

In less-advanced stages of weathering, such as those characteristic of the present weathering cycle 

and of most of the rocks described here, the rocks are medium to dark shades of brown or gray and 

some of the more soluble materials mentioned above 

have been leached out. Judging from the rocks ex- posed on various levels in the Anaconda Copper 

Mining Company mine at Conda, the P 0 5 content of 

such moderately weathered rocks maylbe one or two 

percentage points higher than in unweathered rocks at 

depth. 

CLASSIFICATION AND NOMENCLATURE OF 

ROCKS OF THE PHOSPHORIA FORMATION 

Rocks of the Phosphoria and adjacent formations consist of mixtures of three types of materials: 

(1) detrital silicates--principally quartz, clay, mica, 

and feldspar; (Z) chemical precipitates--dominantly 

the isotropic carbonate-fluorapatite (collophane), 

calcite, dolomite, and chert but locally including 

minor amounts of pyrite or marcasite, gypsum, and 

glauconite; and (3) carbonaceous matter. Most of the 

detrital materials are silt or clay size in southeastern 

Idaho, but sand-size particles occur in other parts of 

the field. Many of the chemical precipitates, particularly the phosphates, are aggregated into pellets or nodules which give a coarse-textured appearance. 

Because the rocks are mixtures and because they 

were deposited under similar physical conditions, 

they are remarkably uniform in appearance and they are difficult to differentiate, especially in the field. 

For this reason, the majority of the names applied to 

the rocks in the field have been revised or modified 

on receipt of chemical or petrographic analyses. 

The most significant property of the rocks is 

their composition, and this has been used as the principal basis in naming them. As the rocks are mixtures, their composition seldom can be described by 

the use of a noun alone. The rock names reported 

here, therefore, generally consist of a noun, chosen 

to represent the dominant constituent, supplemented 

by adjectives representing each constituent that 

makes up more than ZO percent of the rock, listed in 

order of decreasing abundance. 

Nouns describing nonsilicate rocks include phosphate rock, limestone, and dolomite. The choice of 

these names is not influenced by texture, whether colloform, crystalline, or fragmental. Silicate rocks, that 

is, those rocks that contain a predominance, either individually or collectively, of silicate minerals such as chert, quartz, clay, mica, and feldspar, are subdivided 

into sandstone or mudstone, depending upon whether the 

larger percentage of these materials is sand size 

( 1/ 16-2mm) or is finer-grained, or into chert. Because 

it is seldom possible to differentiate silt-size from 

clay-size particles in the field, and frequently not possible to do it in thin sections, in carbonaceous rocks 

such as these, the term mudstone has been used to include all detrital rocks containing particles smaller 

than sand size. Quartzite has been used to describe 

a sandstone so well cemented that the rock breaks 

through, rather than around, most of the grains. 

Derivatives of all these nouns are used as adjectives--phosphatic, calcareous, dolomitic, cherty, 

sandy, argillaceous (silt and clay not differentiated)-:.-

if the respective constituents make up ZO percent or more of the rock. Other constituents that generally 

do not make up ZO percent or more of the rocks, such 

as gypsum, glauconite, limonite, and fluorite, are 

mentioned, if they seem unusuall7. abundant, by preceding the constituent name with 'contains". Because 

nearly all rocks of the phosphatic shale member con- tain carbonaceous matter, though rarely in excess of 

or even approaching ZO percent, this constituent is 

generally not recognized in the rock name. 

Attention should be called to the fact that certain 

rock names--shale (which, where rigorously defined, 

is a fine-grained fissile detrital rock), oolite, and 

pisolite--are not applied here to rocks of the Phosphoria formation. These names, which are based 

upon structural features, have been abandoned with some misgivings, for they are easy to use in the field. 
FEET 

30 

50 

10 

150 

2 

300 

350 

400 

PERCENT P

2 05 

20 10 0 LITHOL08Y 

THICK- AVERA8E 

NESS Pz %1

M 

IN FEET PERCE!JT DESCRIPTION 

Rex chert member (top not exposed) 

46 Chert: hard, black, thin-bedded 

32 Mudstone: hard, black, thin-bedded 

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

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

82 dark-gray, massive limestone 

19 oolitic, nodular, medium-hard, light brownish-gray; contains 

gasuopods 

me,dium-llllrci, brownish-gray, thin-bedded; 2-foot limestone bed at top; 

in middle 12 feet 

on 

black, 

concontains a 

Lower 0.5 fo'ot contains white 

Wells formation 

Figure 2. --Generalized typical section of Phosphoria formation in southeastern Idaho 

5 

\ 
Though the term shale is discarded as a rock name, it 

will continue to be used as a formation name, as the 

"phosphatic shale member". The usage of the term in 

this sense for a group of fine-grained thin-bedded, but 

not necessarily fissile, detrital rocks is so firmly entrenched in stratigraphic nomenclature that it would be 

useless to try to displace it, even if it were desirable 

to do so. 

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; another member, a thin-bedded 

cherty mudstone 15 to 75 feet thick, overlies the 

Rex chert in most of southeastern Idaho and western 

Wyoming, though it is not well defined at the type 

locality. 

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

Dinwoody formation. The upper 50 to 75 feet of the 

Wells formation 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 focused. It 

consists of many thin layers, some of which persist 

over the whole area. They may be grouped into several 

broad units, as yet unnamed, as shown in figure 2. 

STRATIGRAPHIC SECTIONS 

Abstracts of stratigraphic sections measured at 

12 localities, and the available analytical data, are presented in the following pages. Their locations, as well 

as the locations of others to be reported later, are 

shown in plate 1. 

The semiquantitative spectrographic analyses are 

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

made at the same exposure. Greater sensitivities for 

many elements can be obtained by additional exposures. 

The standard sensitivities for the elements noted in this 

report are as follows: 

Element 

Al ...... . Sb ...... . 

As ...... . Ba ...... . 

Be ...... . 

Bi ...... . 

B ...... . 

Cd ...... . 

Ca ...... . 

Cr ...... . 

Co ...... . 

Cb ...... . 

Cu ...... . 

Ga ...... . 

Ge ...... . 

Au ...... . 

In .....•. Fe ...... . Pb ...... . 

Percent 

0.005 

. 05 

. 1 

. 08 

. 001 

. 002 

. 001 

. 1 

. 01 

. 02 

. 01 

. 01 

. 001 

. 05 

. 01 

. 01 

. 05 

. 005 

• 1 

Element 

Li ...... . Mg 

Mn 

Hg 

Mo 

Ni 

p 

Pt 

Si 

Ag 

Na 

Sr 

Ta 

Sn 

Ti 

w 

v 

Zn 

Zr 

Percent 

0. 2 

. 001 

. 004 

. 10 

. 004 

. 01 

. 8 

. 01 

. 002 

. 001 

. 05 

• 1 

1.0 

• 01 

• 002 

. 1 

. 01 

. 05 

. 003 

6 

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. 

Deiss, Charles, 1947, Phosphate deposits of the 

Deer Creek-Wells Canyon area, Caribou County, 

Idaho: U. S. Geol. Survey Bull. 955-C. 

Hoffman, James J., and Lundell, G. E., 1938, Analysis of phosphate rock: U. S. Bur. Standards 

Research Paper 109 5. 

Huleatt, William P., 1950, Automatic sample preparation saves time, money for U. S. G. S. : Eng. 

and Min. Jour., vol. 151, pp. 62-67. 

Long, A. E., 1949, Experimental diamond core-drilling in the Phosphoria formation in southeastern 

Idaho: U. S. Bur. Mines Rept. Inv. 4597. 

Mansfield, G. R., 1927, Geography, Geology, and 

mineral resources of part of southeastern Idaho: 

U. S. Geol. Survey Prof. Paper 152. References 

to other areas are listed by Clabaugh, 1946. 

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

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

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

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

Armstrong, F. C., 1953; Stratigraphic sections of 

the Phosphoria formation in Wyoming, 1947-48: 

U. S. Geol. Survey Circular 210. 

Richards, R. W., and Mansfield, G. R., 1912, The 

Bannock overthrust: a major fault in southeastern 

Idaho and northeastern Utah: Jour. Geology, vol. 

20, p. 684 

Smith, L. E., Hosford, G. F., Sears, R. S., Sprouse, 

D. P., and Stewart, M. D., 1953; Stratigraphic 

sections of the Phosphoria and Park City formations in Utah, 194 7-48: U. S. Geol. Survey Circular 

211. 

Swanson, R. W., Lowell, W. R., Cressman, E. R., 

and Bostwick, D. A., 1953; Stratigraphic sections 

of the Phosphoria formation in Montana, 1947-48: 

U. S. Geol. Survey Circular 209. 
~ 

DIAMOND DRILL HOLE 8, FORT HALL MINE, IDAHO. LOT NO. 1279. 

Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole 8, near diamond drill hole 237 at Fort Hall 

Mine of J. R. Simplot Company, sec. 14, T. 4 S., R. 37 E., Bingham County, Idaho. Hole drilled in October 1948 by U.S. Bureau of Mines, 

A. E. Long in charge, and core measured and sampled by D. F. Davidson. Samples analyzed by U.S. Bureau of Mines Laboratory, Albany, 

Oregon. 

Bed Rock description Sample 

Chemical an~)lyses Cumulative 

no. Thickness (percent Thickness x 

no. (feet) J -x-crcr thickness percent P lvo5 

P205 insoluble (feet) (cumulat eJ 

Phosphatic shale member of Phosphoria formation--lower beds only 

p -35 Mudstone and phosphate rock DFD-1144 2.5 16. 1 40.2 2. 5 40.25 

p -34 Mudstone and phosphate rock DFD-1145 0.9 15.8 41.5 3. 4 54.47 

p -33 Limestone, argillaceous DFD-1146 1. 6 5.2 23.2 5. 0 62.79 

P -3Z Phosphate rock, argillaceous, 

calcareous DFD-1147 0.7 15.4 33.8 5. 7 73.57 

p -31 Mudstone, phosphatic, calcareous DFD-1148 1.8 9.5 51.6 7. 5 90.67 

p -30 Limestone DFD-1149 0.8 2.3 10.2 8. 3 92.51 

p -29 Core missing -- 1. 4 -- -- 9.7 -- p -28 Mudstone, phosphatic DFD-1150 0.3 13.8 40.5 10.0 4. 14• 

p -27 Mudstone, phosphatic DFD-1206 3.2 13.3 49.4 13.2 46.70 

p -26 Phosphate rock, calcareous, argillaceous DFD-1207 1. 5 18.4 24.4 14.7 74.30 

p -25 Phosphate rock, calcareous, argillaceous DFD-1208 1. 2 14.8 25.8 15.9 92.06 

p -24 Phosphate rock, calcareous DFD-1209 1. 0 22.9 19.6 16.9 114.96 

p -23 Limestone., phosphatic DFD-3336 1.2 15.6 11.6 18. 1 133.68 

p -22 Phosphate rock DFD-1248 1. 8 26.7 19. 6 19.9 181.74 

p -21 Phosphate rock, argillaceous DFD-1249 1. 6 16.2 39.1 21.5 207.66 

p -20 Mudstone, phosphatic DFD-1250 1. 2 15.6 43.4 22.7 226.38 

p -19 Phosphate rock, argillaceous, calcareous DFD-1251 1.7 17.9 32.3 24.4 256.81 

p -18 Phosphate rock, argillaceous DFD-1252 0.6 25.8 21.9 25.0 212.29 

p -17 Phosphate rock, argillaceous DFD-1253 1.5 21.0 21.0 26.5 312.79 

p -16 Phosphate rock, argillaceous DFD-1254 1. 8 26.3 22.8 28.3 360.13 

p -15 Core missing -- 2.8 -- -- 31. 1 -- p -14 Mudstone, phosph.tic DFD-1255 0.5 16.6 45.6 \ 31.6 8.30* 

p -13 Mudstone, phosphatic DFD-1256 0.6 15.7 46.5 32.2 17.72 

p -12 Phosphate rock DFD-1257 1. 3 30.7 13.8 33.5 57.63 

p -11 Phosphate rock, argillaceous DFD-1258 2.8 22.2 33. 1 36.3 119.79 

p -10 Phosphate rock and mudstone DFD-1259 2.0 18.5 28.1 38.3 156.79 

p - 9 Phosphate rock and mudstone DFD-1827 2.0 30.8 12.6 40.3 218.39 

p - 8 Phosphate rock and mudstone DFD-1828 1.0 24.6 20.2 41.3 242.99 

p - 7 Limestone DFD-1976 1. 0 4.9 17.4 42.3 247.89 

• Cumulative data incomplete due to missing information. Computations start from zero after interruption. 
Cheurcal analyses Cumulative Thickness x Bed Sample Thickness [percent) 

no. Rock description no. (feet) Acfd thickness percent P/to5 

PzOs insoluble (feet) (cumulat e1 

p - 6 Phosphate rock DFD-1977 1. 1 Z8.0 15.9 43.4 278.69 

p - 5 Limestone, phosphatic DFD-1978 1. 8 11.8 13. 1 45.2 299.93 

p - 4 Phosphate rock, arpllaceous DFD-1979 z.o 24.0 23~9 47.2 347.93 

p - 3 Phosphate rock DFD-1980 2. 6 34.7 3. 1 49.8 438.15 

p - z Limestone, arpllaceous, phosphatic DFD-2170 0.5 11.8 29.4 50.3 444.05 

p - 1 Limestone, argillaceous DFD-2295 0.8 5.4 33.3 51. 1 448.37** 

Wells formation 

Cw- 1 I Limestone, argillaceous DFD-ZZ96 o.z 0.50 

•• Note incompleteness of cumulative data. 

ao 
..0 

DIAMOND DRILL HOLE 9, FORT HALL MINE, IDAHO. LOT NO. 1Z80. 

Part of phosphatic shale member of Phosphoria formation sampled from diamond drill hole 9 near diamond drill hole Z3 7 at Fort 

Hall Mine of J. R. SimplotCompany, sec. 14, T. 4 S., R. 37 E., BinghamCounty, Idaho. Hole drilled in October 1948 by U.S. Bureau of 

Mines, A. E. Long in charge, and measured and sampled by D. F. Davidson. Samples analyzed by U.S. Bureau of Mines Laboratory, 

Albany, Oregon. 

Bed Sample Thickness 

Cheugcal analyses Cumulative 

no. Rock description percentY Thickness x 

no. (feet) I acia thickness percent P 0 

Pz05 insoluble (feet) ( cumulat~e 1 

Phosphatic shale member of Phosphoria formation-lower beds only 

p -34 Mudstone, calcareous DFD-ZZ97 o. 5 7.7 43.8 0.5 3.85 

p -33 Mudstone, phosphatic DFD-ZZ98 z.o 13.5 44.0 z. 5 30.85 

P -3Z Mudstone, phosphatic, calcareous DFD-ZZ99 0.6 13.7 36.5 3. 1 39.07 

p -31 Limestone DFD-Z300 0.7 1. 9 8.0 3. 8 40.40 

p -30 Mudstone, phosphatic, calcareous DFD-3035 3.4 11.5 46.Z 7. z ~ 

P -Z9 Core missing -- 1.0 -- -- 8. z -- P -z8 Limestone DFD-Z468 0.8 o. 7 8.6 9.0 0.56* 

P -Z7 Mudstone, phosphatic DFD-Z469 z. z lZ. 1 49.4 11. z Z7. 18 

P -Z6 Phosphate rock, argillaceous DFD-Z470 1. 1 16.0 39.7 lZ. 3 44.78 

P -zs Phosphate rock, calcareous, argillaceous DFD-Z471 1.0 14.6 30.6 13.3 59.38 

P -Z4 Phosphate rock and calcareous mudstone DFD-Z47Z 0.9 19. 3 Zl. 7 14.Z 76.75 

P -Z3 Phosphate rock and mudstone DFD-Z473 1. 0 18.Z ZZ.9 15. z 94.95 

P -zz Phosphate r.ock, calcareous, argillaceous DFD-Z474 1.5 17.0 Z3. 5 16. 7 1Z0.45 

P -Z1 Phosphate rock, calcareous DFD-Z475 l.Z Z4.4 16.9 17.9 149.73 

P -zo Phosphate rock, argillaceous DFD-Z531 1. 7 Z6. 1 Z0.4 19.6 194. 10 

p -19 Phosphate rock, argillaceous DFD-Z53Z 1. 6 17.Z 38.6 Z1. Z ZZ1.6Z 

p -18 Limestone DFD-Z533 0.9 3.Z 4.5 zz. 1 ZZ4.50 

p -17 Mudstone, phosphatic, calcareous DFD-Z534 Z.9 13.4 36.5 Z5.0 Z63.36 

p -16 Phosphate rock and mudstone DFD-Z535 1. 6 Z9. 1 13. 1 Z6.6 309.9Z 

p -15 Phosphate rock and mudstone DFD-Z536 1. 9 ZZ.7 Z9.6 Z8.5 353.05 

p -14 Phosphate rock and mudstone DFD-Z537 1. 3 ZZ.6 Z7. 3 Z9.8 38Z.43 

p 

P 

-13 

-1Z Core 

Limestone 

missing 

DFD-Z538 

-- o.s 

0.4 

Z.6 

-- 14.5 -- 30.3 

30.7 ~ 

p -11 Mudstone, phosphatic, calcareous DFD-Z539 Z.5 13.9 40.7 33.Z 34. 75* 

p -10 Phosphate rock and mudstone DFD-Z540 Z.7 Z7.6 19.8 35.9 109. Z7 

p - 9 Phosphate rock and mudstone DFD-Z541 z.o ZZ.8 31.6 37.9 154.87 

p - 8 Phosphate rock DFD-Z54Z z.o 31. 7 9.4 39.9 Zl8.Z7 

p - 7 Phosphate rock and mudstone DFD-Z543 z~ z Z7.6 16.3 4Z. 1 Z78.99 

p - 6 Limestone, argillaceous DFD-Z544 0.6 0.9 ZZ.4 4Z.7 Z79.53 

p - 5 Phosphate rock, calcareous DFD-Z545 1. 6 zz.o 19.0 44.3 314.73 

*Cumulative data incomplete due to missing information. Computations start from zero after interruption. 
.... 

0 

Bed 

no. 

p - 4 

p - 3 

p - z 

p - 1 

Cw- 3 

Cw- Z 

Cw- 1 

Chemical analyses Cumulative 

Rock description Sample Thickness (percent} thickness no. {feet) Pz05 

Aclct (feet) insoluble 

Limestone DFD-Z546 0,8 6.4 8.6 45. 1 

Core missing -- Z.9 -- -- 48. 1 

Phosphate rock DFD-Z547 1. 4 Z7.5 11. z 49.4 

Limestone. argillaceous DFD-Z548 1. 4 0.8 36.0 50.8 

Wells formation 

Limestone. argillaceous DFD-ZS49 0.7 Z.7 Zl. Z o. 7 

Core missing -- 3. 0 -- -- 3. 7 

Limestone • argillaceous DFD-Z550 1. 4 z. 1 31. 7 5. 1 

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 

**Note incompleteness of cumulative data • 

Thickness x percent P 2o5 ( cumulative 1 

~ --

35. 75* 

36. 87** 

1. 89 

--

4.83* 
.... 

CALDWELL CANYON, IDAHO. LOT NO. 1260. 

Phosphatic shale member of Phosphoria formation sampled in bulldozer trench on north s'ide of Caldwell Canyon, sec. 1, T. 8 S., R. 43 E., 

Caribou County, Idaho, on east limb of Slug Creek syncline. Beds strike N. 10° W. and dip 40° E. Section measured by R. A. Hoppin, D. F. Davidson, 

and F. W. ()I Malley and sampled by R. A. Smart, R. P. Sheldon, R. G. Waring and T. K. Rigby 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. S. deological 

Survey, Washington, D. C. 

Bed Sample Thickness Chemical. analyses (percent) Cumulative Thickness x Rock description P 0 I Al 0 I Fe 0 ~~ Loss on I Acid thickness percent P 2 0 no. no. (feet) 2 5 2 3 2 3 ignition insoluble (feet) (cumulatlvef 

Rex member of Phosphoria formation-basal bed only 

R- 1 I Chert f-woM-175~n I 3~-~-j_ 0.41 -- I -- I - __ --·--r~~~~-_] •• ~. ~---~~ I 

Phosphatic shale member of Phosphoria formation! 

P-84 Mudstone WOM-1749 1.1 5. 2 -- -- -- 57.7 1. 1 5. 70 

P-83 Mudstone WOM-1748 1.2 o. 7 -- -- -- 70.0 2. 3 6.56 

P-82 Mudstone 2 WOM-1747 1. 4 4.9 -- -- -- 59.0 3. 7 13.42 

P-81 Mudstone; fos. col. no. 48-JES-189 WOM-1746 2.7 0.5 -- _ .. -- 64.4 6.4 14.77 

P-80 Mudstone, calcareous WOM-1745 0.6 2.4 -- -- -- 63.1 7. 0 16.21 

P-79 Limestone, argillaceous; fos. col. no. 48-JES-188 WOM-1744 1.1 o. 6 -- -- -- 38.0 a. 1 16.87 

P-78 Mudstone, calcareous; fos. col. no. 48-JES-187 WOM-1743 3.3 2. 7 -- -- -- 68.3 11.4 25.78 

P-77 Mudstone, phosphatic WOM-1742 0.3 14.8 -- -- -- 49.0 11.7 30.22 

P-76 Mudstone WOM-1741 1.3 2.3 -- -- -- 78.5 13. 0 33.21 

P-75 Phosphate rock, argillaceous WOM-1740 0.5 24. 1 -- -- -- 21. 2 13. 5 45.26 

P-74 Mudstone• fos. col. no. 48-JES-186 WOM-1780 1. 9 2. 5 -- -- -- 69.5 15.4 50.01 

P-73 Mudstone, calcareous; fos. col. no. 48-JES-185 WOM-1779 1. 3 o. 2 -- -- -- 52.0 16.7 50.27 

P-72 Phosphate rock WOM 1778 1.9 32.9 -- -- -- 11.3 18.6 112. 78 

P-71 Phosphate rock; fos. col. no. 48-JES-184 WOM-1777 0.7 29. 1 -- -- -- 17. 7 19.3 133. 15 

P-70 Mudstone WOM-1776 0.6 7. 5 -- -- -- 58.2 19.9 137.65 

P-69 Phosphate rock, calcareous WOM-1775 0.9 24.9 -- -- -- 9.5 20.8 160.06 

P-68 Phosphate rock WOM-1774 0.8 33.3 -- -- -- 5. 5 21.6 186. 70 

-- Limestone concretion; fos. col. no. 48-JES-183 WOM-1773 (0. 9) 5. 3 -- -- -- 2.2 -- -- P-67 Phosphate rock, calcareous and phosphatic 

calcareous mudstone; fos. col. no. 48-JES-182 I WOM-1772 3.0 19. 7 -- -- -- 25.0 24.6 245.80 

P-66 Mudstone, phosphatic WOM-1771 1. 0 12. 7 -- -- -- 45.0 25.6 258.50 

P-65 Phosphate rock, argillaceous DFD- 1790 1. 3 18.0 -- -- -- 37.3 26.9 281. 90 

P-64 Mudstone: fos. col. no. 48-JES-181 DFD- 1789 1.3 7. 6 -- -- -- 63.3 28.2 291. 78 

! The thinness of the Phosphatic shale member is probably due to faulting. 

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

N 

Bed 

p 

p 

p 

p 

no. 

--

'-63 

'-6Z 

'-61 

'-60 

'-59 

'-58 

'-57 

'-56 

'-55 

-54 

'-53 

-5Z 

-51 

-so 

-49 

-48 

-47 

-46 

-45 

-44 

-43 

-4Z 

-41 

-40 

-39 

-38 

-37 

-36 

-35 

-34 

-33 

-32 

-31 

-30 

Sample Thickness Chemical analyses (percent) Cumulative Thickness x Rock description (feet} PzOs Alzo3 Fe2o 3 

Loss on Acid thickness percent P 0 no. 5 ignition insoluble (feet) (cumulatn.e, 

Limestone lens ? , argillaceous DFD- 1788 (0. 9) o. 5 -- -- -- Z9.8 -- -- Mudstone, phosphatic, fos. col. no. 

48-JES-180 DFD- 1787 3.Z 8. 5 -- -- -- 61.7 31.40 318.98 

Mudstone. phosphatic DFD- 1786 0.7 10.6 -- -- -- 59.8 3Z.l0 3Z6.40 

Phosphate rock, argillaceous; fos. col. no. 48-JES-1 79 DFD- 1785 Z.7 19.4 -- -- -- 44.0 34.80 378.78 

Mudstone, phosphatic DFD- 1784 0.5 8. 9 -- -- -- 67.3 35.30 383.Z3 

Mudstone, phosphatic# fos. col. no. 48-JES-178 DFD- 1783 0.9 8. 7 -- -- -- 66.3 36.ZO 391.06 

Mudstone, phosphatic, DFD- 178Z 0.4 9.6 -- -- _ .. 59.7 36.60 394.90 

Mudstone; fos. col. no. 48-JES-177 DFD- 1781 3.6 6. 4 -- -- -- 70.6 40.ZO 417.94 

Mudstone DFD- 1760 0.8 1.6 -- -- -- 83.0 41.00 419.ZZ 

Mudstone DFD- 1759 0.5 6.4 -- -- -- 74.Z 41.50 4ZZ.4Z 

Mudstone, phosphatic DFD- 1758 1. z 9. 1 -- -- -- 64.0 4Z. 70 433.34 

Phosphate rock, argillaceous DFD- 1757 0.6 17.5 -- -- -- 43.Z 43.30 443.84 

Mudstone, phosphatic DFD- 1756 0.8 15.4 -- -- -- 45.8 44. 10 456.16 

Mudstone, phosphatic DFD- 1755 0.6 9.8 -- -- -- 57.8 44.70 46Z.04 

Mudstone DFD- 1754 0.7 6.4 -- -- -- 6Z.5 45.40 466.5Z 

Mudstone, phosphatic DFD- 1753 1. 0 7. 9 -- -- -- 64.5 46.40 474.4Z 

Mudstone DFD~ 175Z 1. 1 5.1 -- -- -- 74.8 47.50 480.03 

Mudstone; fos. col. no. 48-JES-176 DFD- 1751 0.7 5.5 -- -- -- 7Z.8 48.ZO 483.88 

Phosphate rock and phosphatic mudstone WOM-1810 0.7 Z4.6 -- -- -- Z6.0 48.90 501. 10 

Mudstone, phosphatic WOM-1809 0.7 8.4 -- -- -- 55.6 49.60 506.98 

Mudstone WOM-1808 0.7 5. 1 -- -- -- 71. 1 50.30 510.55 

Many of the beds from P-Z7 to P-43 show prominent shearing that probably represents faulting and accounts for the abnormally small 

thickness of the phosphatic shale member at this locality. 

Phosphate rock WOM-1807 0.4 Z5. 8 -- -- -- 19.5 50.70 5Z0.87 

Mudstone, phosphatic WOM-1806 0.7 13.7 -- -- -- 53. 1 51.40 530.46 

Mudstone WOM-1805 0.8 1. z -- -- -- 84.3 5Z.ZO 531. 4Z 

Mudstone WOM-1804 z.z 1. 6 -- -- -- 83.8 54.40 534.94 

Mudstone WOM-1803 0.6 0.9 -- -- -- 83.3 55.00 535.48 

Mudstone, phosphatic WOM-180Z 1. 5 11. 1 -- -- -- 60.3 56.50 552. 13 

Mudstone WOM-1801 z. 8? 4. 7 -- -- -- 73.0 59.30 565.29 

lludstone, calcareous WOM-1800 0.7 7. 3 -- -- -- 58.2 60.00 570.40 

Phosphate rock WOM-1799 0.5 27.4 -- -- -- 19.8 60.50 584.10 

Mudstone, phosphatic WOM-1798 1. 0 9. s -- -- -- 61.3 61. so 593.60 

Phosphate rock, argillaceous WOM-1797 0.6 18. 1 -- -- -- 37.7 6Z.l0 604.46 

Mudstone, calcareous WOM-1796 1. 0 z. 8 -- -- -- 58.5 63.10 607.26 

Mudstone, phosphatic WOM-1795 0.5 11. 1 -- -- -- 51.9 63.60 61Z.81 

Mudstone, phosphatic.; fos. col. no. 48-JES-175? WOM-1794 1. 3 10.4 -- -- -- 49.7 64.90 626.33 
.... 

~ 

P-29 Mudstone 

P-28 Mudstone 

P-27 Mudstone 

P-26 Mudstone~ phosphatic, calcareous 

P-25 Mudstone, phosphatic 

P-24 Mudstone, phosphatic 

P-23 Phosphate rock, argillaceous 

P-ZZ Phosphate rock, argillaceous 

P-21 Limestone 

P-ZO Limestone; fos. col. no. 48-JES-174 

P-19 Phosphate rock, argillaceous 

P-18 Mudstone, phosphatic~ calcareous 

P-17 Mudstone, phosphaticl fos. col. no. 48-JES-173 

P-16 Limestone; fos. col. no. 48-JES-172 

P-15 Phosphate rock, argillaceous 

P-14 Phosphate rock 

P-13 Phosphate rock, argillaceous 

P-12 Limestone, argillaceous; fos. col. no. 48-JES-171 

P-11 Phosphate rock 

P-10 Phosphate rock 

P- 9 Phosphate rock 

P- 8 Phosphate rock 

P- 7 Limestone~ phosphatic, argillaceousl 

fos. col. no. 48-JES-170 

P- 6 Phosphate rock 

P- 5 Limestone 

P- 4 Phosphate rock; fos. col. no. 48-JES-169 

P- 3 Limestone; fos. col. no. 48-JES-168 

P- 2 Limestone and phosphate rock; fos. col. no. 48-JES-167 

P- 1 Phosphate rock 

Cw-1 I Limestone; fos. col. no. 48-JES-166 

WOM-1793 0.4 3. 3 

WOM-1792 0.7 2.9 

WOM-1791 1. 9 4.9 

WOM-1820 1. 2 10.4 

WOM-1819 1.1 9. 7 

WOM-1818 1. 2 13.2 

WOM-1817 2.2 22.7 

WOM-1816 1.2 15.7 

WOM-1815 4.5 1. 2 

WOM-1814 5.0 1.4 

WOM-1813 1. 4 23. z 

WOM-1812 1. z 11.7 

WOM-1811 0.8 10.2 

RAH- 1826 3.7 5.6 

RAH- 1825 0.6 23.7 

RAH- 1824 1. 8 31.6 

RAH- 1823 1. 9 26.7 

-RAH- 1822 0.8 3.4 

RAH- 1821 1.2 34.2 

RAH- 1770 1. 3 29.1 

RAH- 1769 2.0 32.8 

RAH- 1768 1. 5 32.0 

RAH- 1767 1. 3 9.7 

RAH- 1766 1. 0 26.9 

RAH- 1765 1. 0 4.9 

RAH- 1764 3.3? 25.3 

RAH- 1763 2. 5 2.3 

RAH- 1762 0.8 19.9 

RAH- 1761 3.5 38.6 

Wells formation 

RAH- 1739 

-- -- -- 7Z.Z 65.30 627.65 

-- -- -- 74.5 66.00 629.68 

-- -- -- 66.3 67.90 638.99 

-- -- -- 50.6 69. 10 651. 47 

-- -- -- 59.0 70.20 662. 14 

-- -- -- 47.3 71.40 677.98 

-- -- -- 21. Z 74.60 7Z7.9Z 

-- -· -- 34.1 73.80 746.76 

-- -- -- 5.9 79.30 752. 16 

-- -- -- 14.0 84.30 759. 16 

-- -- -- 29.8 85.70 791.64 

-- -- -- 48.7 86.90 805.68 

-- -- -- 53.4. 87.70 813.84 

-- -- -- lZ. 7 91.40 834.56 

4. 1 1. 52 6.92 26.8 92.00 848.78 

1.3 0.73 6.98 10.0 93.80 905. 66 

3. 3 1. 32 6.66 20.5 95.70 956.39 

4 .. 5 1. 50 28.58 29.7 96.50 959. 11 

0.67 0.46 6.52 4.3 97.70 1, 000. 15 

2.5 1. 03 8.34 12.3 99.00 1,037.98 

0.67 0.42 6. 76 4.8 101.00 1, 103. 58 

1. 5 o. 71 6.88 7. 0 102.50 1, 151. 58 

3.4 1. 06 25.18 20.2 103.80 1, 164. 19 

2. 1 o.as 10. 18 10.9 104.80 1, 191.09 

2.3 0.52 35.92 7. 9 105.80 1, 195. 99 

3.5 1. 07 a. 14 18.8 109.10 1, 279. 48 

0.46 o. so 38.42 12.4 Ill. 60 l, 285. 23 

1. 8 2. 56 15.96 14.3 112.40 1, 301. 15 

1. 1 0.67 9.20 14.0 115. 90 1, 436. 25 
:;: 

MABIE CANYON, IDAHO. LOT NO. 1210. 

Phosphatic shale member of Phosphoria formation sampled in bulldozer trench in Mabie Canyon, NWtNEt sec. 10, T. 8 S., R. 44 E., Caribou 

County, Idaho, on east limb of Dry Valley anticline. Section measured by R. M. Campbell, V. E. McKelvey, and R. A. Weeks and sampled by Campbell 

and Weeks in September and October 194 7. Samples analyzed by U. S. Bureau of Mines Laboratory, Albany, Oregon. 

Chemical analyses (percent) Cumulative Thickness x Bed Sample Thickness 

P2051 Al2031 Fe2031 I Rock description Loss on I Acid thickness percent P 0 no. (feet) F ignition insoluble (feet} (cumulat~ef no. 

-

Rex member of Phosphoria formation--basal beds only 

R - 5 Chert VEM-470-47 3.8 o. 5 1. 1 3.5 -- 9.6 73.3 3.8 1.90 

R - 4 Limestone, argillaceous VEM-469-47 1.2 o. 3 0.7 1.8 -- 32.0 25.9 5.0 2.26 

R - 3 Chert VEM-468-47 1.7 0.6 0.79 3.8 -- 6. 7 78.6 6.7 3.28 

R - 2 Mudstone, calcareous; fos. col. no. 47-HW-2591 VEM-467-47 0.35 o. 5 1. 3 1. 5 -- 21.2 51. 1 7.05 3.46 

R - 1 Mudstone, calcareous and chert VEM-466-4 72 1. 0 -- -- -- -- -- -- 8.05 -- Phosphatic shale member of Phosphoria formation 

p -170 Mudstone, calcareous VEM-465-47 0.7 s. 1 4.0 1.5 0.53 13.8 60. 1 0.7 3.57 

p -169 Phosphate rock, argillaceous, 

calcareous; fos. col. no. 47-HW-258 VEM-464-47 0.6 20. 1 4.0 1. 3 -- 12.2 26.6 1. 3 15.63 

p -168 Mudstone, calcareous; fos. col. 

no. 47-HW-257 VEM-463-47 1.9 2.9 9.9 3. 0 -- 9.9 69.4 3. 2 21. 14 

p -167 Mudstone, calcareous VEM-462-47 2. 1 4.7 9. 7 3. 2 -- 12.7 61. 7 5.3 31.01 

p -166 Mudstone VEM-461-47 1. 3 o. 6 11. 1 3. 1 -- 8. 1 76.6 6.6 31.79 

-- Limestone lens, argillaceous, 

in top of bed P-165 VEM-460-47 (0. 0-0. 5) o. 7 3.6 1.3 -- 34.5 22.5 -- -- p -165 Mudstone VEM-459-47 1. 2 2.6 11.6 3. 7 -- 8. 7 69.0 7.8 34.91 

p -164 Mudstone, calcareous VEM-458-47 2.4 0.4 7.4 2.4 -- 19.8 52.5 10.2 35.87 

p -163 Mudstone, calcareous VEM-457-47 1.9 0.4 9.4 3. 1 -- 12.0 67.5 12. 1 36.63 

p -162 Mudstone, calcareous VEM-456-47 2.4 1.3 11.0 3.6 -- 11.0 66.0 14.5 39.75 

p -161 Limestone; fos. col. no. 47-HW-255 VEM-455-47 0.7 o. 6 2. 2 0.8 -- 37.7 14.0 15. 2 40.17 

p -160 Mudstone, calcareous; fos. col. no. 47-HW-254 VEM-454-47 1.8 4.0 10.6 3.0 -- 10.7 62.4 17.0 47.37 

p -159 Mudstone, calcareous; fos. col. 

no. 47-HW-254 VEM-453-47 1. 8 1. 5 9.2 2.7 -- 12.7 64.8 18.8 50.07 

p -158 Limestone, argillaceous, contains 

phosphatic nodules VEM-452-47 0.9 6. 3 1.3 3.3 -- 27.5 24.3 19.7 55.73 

p -157 Mudstone, calcareous VEM-451-47 o. 7 3. 0 9.2 3.2 -- 8.3 68.7 20.4 57.84 

p -156 Phosphate rock, argillaceous, VEM-450-47 0.5 19.9 3. 1 1.8 -- 9. 0 28.5 20.9 67.79 

p -155 Mudstone; fos. col. no. 47-HW-253 VEM-449-47 2.4 3. 1 10.7 3. 1 -- 8.9 69.9 23.3 75.23 
p -154 Limestone, argillaceous: fos. 

col. no. 47-HW-252 VEM-448-47 1. 1 o. 2 5.7 1. 8 -- 25.8 42.1 24.4 75.45 

p -153 Mudstone VEM-447-47 2.4 1. 9 11.7 3.' -- 8.2 72. 1 26.8 10.01 

p -152 Phosphate rock VEM-446-47 o. 5 37.1 0.7 0.5 -- 3.2 1. 8 27.3 99.86 

p -151 Phosphate rock VEM-445-47 o. 5 36.7 0.8 0.4 3.90 4.4 3.5 27.8 117.21 

p -150 Phosphate rock VEM-444-47 0.7 37. 1 0.8 o. 5 3. 72 3. 5 5.0 28.5 143.18 

p -149 Mudstone, calcareous; fos. col. no. 47-HW-251 VEM-443-47 1. 3 4. 1 8.6 2.8 0.47 11.8 60.7 29.8 1-'8.51 

p -148 Phosphate rock, argillaceous VEM-442-47 1. 1 25.5 4.4 1. 9 2.35 5.4 25. 1 30.9 176.56 

p -147 Phosphate rock VEM-441-47 1. 0 21.8 2.4 0.9 3.17 6. 1 11.5 31.9 208.36 

p -146 Phosphate rock VEM-440-47 o.8 32.7 1. 8 0.7 3.27 s. 8 9.8 32.7 234.52 

p -145 Mudstone, phosphatic; fos. col. 

no. 47-HW-250 VEM-439-47 1.0 14.2 6.2 2.3 1. 50 7.4 48. 1 33.7 248.72 

p -144 Phosphate rock VEM-438-47 0.6 31.5 2. 1 0.9 3.17 6. 6 11.9 34.3 267.62 

p -143 Phosphate rock and mudstone VEM-437-47 0.8 16.8 6.4 2.4 1. 45 9. 1 40.5 35. 1 281.06 

p -142 Phosphate rock and mudstone VEM-436-47 o. 5 12.9 8. 1 2. 5 1. 40 9.3 49.4 35.6 287.51 

p -141 Mudstone, calcareous VEM-435-47 0.3 6. 8 9.8 2.4 0.66 16.5 50.6 35.9 289.55 

p -140 Phosphate rock and calcareous 

mudstone VEM-434-47 0.3 9. 1 7.6 2.6 1. 15 14.0 47.8 36.2 292.28 

P -1391 Phosphate rock VEM-433-47 0.9 35. 1 0.6 0.3 3.54 5. 5 3.5 37. 1 323.87 

P -138 Phosphate rock VEM-432-47 1. 4 34.0 1. 6 0.5 3. 54 8.o 4.5 38.5 371.47 

P -13 7 Phosphate rock VEM-431-47 0.9 26.5 3. 1 1. 2 2.83 11.8 14.4 39.4 395.32 

Limestone lens 0. 2 foot below 

- top of bed P-136 VEM-430-47 (0. 0-0. 5) z. 2 1.0 o. 1 -- 42.5 1. 6 U'l p -136 Phosphate rock VEM-429-47 1. 8 23.8 3. 8 1. 1 -- 15.8 17.8 41.2 438.16 

p -135 Phosphate rock VEM-428-47 1. 0 25.9 2.3 0.9 -- 18.7 11.2 42.2 464.06 

p -134 Phosphate rock VEM-427-47 1.3 28.4 2.4 0.8 -- 14.9 9.8 43.5 500.98 

p -133 Phosphate rock and mudstone VEM-426-47 0.4 20.9 4.8 1. 7 -- 18. 5 22.6 43.9 509.34 

p -132 Phosphate rock, argillaceous VEM-425-47 1. 2 20.9 4.9 1. 6 -- 15.5 25.6 45.1 534.42 

p -131 Phosphate rock VEM-424-47 o. 7 26.8 2. 7 1. 1 -- 14.8 14.0 45.8 553.18 

p -130 Phosphate rock VEM-423-47 0.7 23.9 3.8 1. 2 -- 15.5 18.5 46.5 569.91 

p -129 Phosphate rock, argillaceous VEM-422-47 0.9 20. 1 4.9 1. 6 -- 17.7 25.6 47.4 588.00 

p -128 Phosphate rock, argillaeeous VEM-421-47 1. 0 21.2 4.2 1.6 -- 16.5 24.2 48.4 609.20 

p -127 Phosphate rock, argillaceous VEM-420-47 0.8 18.5 4.9 1. 7 -- 17.3 30.5 49.2 624.00 

p -126 Mudstone, phosphatic VEM-419-47 1. 0 9. 2 7. 5 2.6 -- 16.3 52.4 50.2 633.20 

p -125 Mudstone, phosphatic VEM-418-47 1. 3 9.0 7.6 2.7 -- 17.4 51.3 51.5 644.90 

p -124 Mudstone, phosphatic VEM-417-47 1. 2 13.0 7.4 2. 3 -- 15. 8 45.0 52.7 660.50 

p -123 Mudstone VEM-416-47 1. 3 6. 5 9.4 3. 1 -- ll. 7 62.5 54.0 668.95 

p -122 Limestone, argillaceous; fos. 

col. no. 47-HW-249 VEM-415-47 2.0 o. 6 4. 1 1. 8 -- 32.7 28.4 56.0 670.15 

P -121 I Mudstone, phosphatic VEM-414-47 1. 7 12.4 7. 6 2. 5 -- 16.2 44.4 57.7 691.23 

1 

2 Fossil collection by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. 

Sample lost. 
p 

p 

p 

p 

p 

p 

p 

... p a- p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

Bed 

no. 

-120 

-119 

-118 

-117 

-116 

-115 

-114 

-113 

-112 

-111 

-110 

-109 

-108 

-~07 

-106 

-105 

-104 

-103 

-102 

-101 

-100 

- .99 

- 98 - 97 

- 96 

- 95 - 94 - 93 - 92 - 91 

- 90 

- 89 - 88 

- 87 

- 86 

- 85 - 84 

Rock description 

Mudstone, phosphatic 

Phosphate roc.k, argillaceous 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone. phosphatic, contains 

phosphatic nodules 

Phosphate rock, argillaceous 

Mudstone, contains phosphatic 

nodules 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone; fos. col. no. 47-HW-248 

Limestone; fos. col. no. 47-HW-243 

Mudstone 

Phosphate rock and mudstone 

Phosphate rock, argillaceous 

Mudstone 

Mudstone 

Mudstone, calcareous 

Mudstone, phosphatic 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Phosphate rock 

Mudstone 

Mudstone, calcareous, phosphatic 

Mudstone and phosphate rock 

Phosphate rock, arJillaceous 

Mudstone 

Mudstone and phosphate rock; 

fos. col. no. 47-HW-242 

Mudstone 

LimestODe, argillaceous 

Mudstone and phosphate rock 

Mudstone 

Sample Thickness 

no. (feet) P2os 

VEM-413-47 0.3 10.2 

VEM-412-47 0.8 16.8 

VEM-411-47 0.6 15.6 

VEM-410-47 1. 2 8.6 

VEM-409-47 1. 3 7.4 

VEM-408-47 2.0 10.9 

VEM-407-47 o. 5 15.7 

VEM-406-47 0.8 13. 6 

VEM-405-47 0.8 24.3 

VEM-404-47 1. 6 3. 7 

VEM-403-47 1. 1 11.4 

VEM-402-47 0.8 15.4 

VEM-401-47 1. 2 10.0 

VEM-400-47 2.6 6. 9 

VEM-399-47 1.6 o. 7 

VEM-398-47 0.7 s. 4 

VEM-397-47 1. 2 13. 1 

VEM-396-47 1. 1 16.3 

VEM-395-47 1. 5 2. 1 

VEM-394-47 1. 0 1. 3 

VEM-393-47 1. 2 2. 7 

VEM-392-47 1. 2 10. 1 

VEM-391-47 o. 8 3.0 

VEM-390-47 1. 4 4.6 

VEM-389-47 0.9 4. 6 

VEM-388-47 0.5 3.4 

VEM-387-47 0.3 27.9 

VEM-386-47 1. 0 7. 1 

VEM-385-47 1. 1 11.4 

VEM-384-47 1. 0 8. 8 

VEM-383-47 0.8 19. 1 

VEM-382-47 1. 1 4.6 

VEM-381-47 1. 3 12.8 

VEM-380-47 2. 3 3. 9 

VE:U:-379-47 2.0 0.4 

VEM-378-47 2.4 7. 4 

VEM-377-47 0.4 1. 0 

Chemical analyses _{percent) Cumulative Thickness x Loss on Acid thickness percent Prvo Al 5 2o 3 Fe2o 3 F ignition insoluble (feet) (cumulat e1 

8.0 2. 5 -- 16.6 49.4 58.00 694.29 

6. 1 2. 2 -- 15.5 35.6 58.80 707. 73 

4.9 2.2 -- 10.7 44.7 59.40 717.09 

8. 5 2.6 -- 14.9 54.0 60.60 727.41 

9.8 3.2 -- 11.4 63.9 61.90 737. 03 

7.8 2.8 -- 10.4 56. 1 63.90 758.83 

7. 2 2. 8 -- 10.6 44.1 64.40 766.68 

6. 1 3. 0 -- 4.5 56.9 65.20 777.56 

4.0 2. 5 -- 5. 1 30.1 66.00 797.00 

8.9 2.9 -- 6. 5 77.4 67.60 802.92 

7.3 2. 7 -- 6.5 59.9 68.70 815.46 s. 9 1. 9 -- 11.4 44.0 69.50 827.78 

7.4 2.0 -- 9.1 60.8 70.70 839.78 

7.9 2. 7 -- 7.4 69.7 73.30 857. 72 

1. 9 0.9 -- 38.1 16. 1 74.90 858.84 

8. 1 2. 8 -- 8.4 70.8 75.60 862.62 

6.4 2.6 -- 10.9 47.4 76.80 878.34 

8.4 2. 5 -- 11.3 23.6 77.90 896.27 

9.9 2. 7 -- 8.9 78.2 79.40 899.42 

9.9 2.8 -- 10. 7 76.2 80.40 900.72 

8. 2 2. 5 -- 16.4 60.7 81.60 903.96 

7.4 2.4 -- 14.1 53.2 82.80 916.08 

9.9 2.8 -- 13.9 71. 5 83.60 918.48 

9. 6 3. 0 -- 10.4 72.1 85.00 CJ24.92 

10. 7 3. 2 -- 8.6 75.0 85.90 929.06 

11.8 3.7 -- 15.8 65.4 86.40 930.76 

2.5 1. 4 -- 8.2 16.9 86.70 939. 13 

9.0 3.4 -- 9.0 66.2 87.70 946.23 

7. 5 2.8 -- 16.9 45.6 88.80 958.77 

8. 5 3.2 -- 16.0 51.7 89.80 967. 57 

4.5 1. 6 -- 18.0 27.8 90.60 982.85 

10.2 2.9 -- 12.9 68.3 91.70 987.91 

8.4 3.4 -- 7.8 54.4 93.00 1, 004. 55 

10.5 4.4 -- s. 0 79.4 95.30 1. 013.52 

4.9 1. 9 -- 29.7 35.0 97.30 I, 014.32 

9.8 4.2 -- 5. 3 69.6 99.70 1, 032. 08 

7.2 5.2 -- 8. 1 82.0 100.,10 1,032.48 
p - 83 Mudstone and calcareous 

mudstone VEM-376-47 z.s 0.4 6.8 Z.5 -- Z4.Z 47.4 lOZ.90 1,033.60 

P - 8Z Mudstone and phosphate rock VEM-375-47 0.5 14.7 7.9 3.3 -- 5. 5 50.9 103.40 1,040.95 

p - 81 Mudstone and phosphate rock VEM-374-47 Z.9 9.8 9.9 4.7 -- 5.3 63.9 106.30 1,069.37 

p - 80 Mudstone VEM-373-47 1. 0 1. 7 lZ. 0 3.8 -- 5.4 84.7 107.30 1, 071. 07 

p - 79 Phosphate rock VEM-37Z-47 1. 0 3Z.Z Z.4 Z.4 -- 3.3 lZ. 0 108.30 1, 103. Z7 

p - 78 Phosphate rock and mudstone VEM-371-47 0.7 Zl.4 5.4 4.9 -- 5.Z 33.3 109.00 1, 118. Z5 

p - 77 Mudstone VEM-370-47 1. 4 1. 6 11.5 5. z -- 6. 7 81.8 110.40 1, 1ZO. 49 

p - 76 Phosphate rock and mudstone VEM-369-47 0.9 ZZ.5 5.5 3.5 -- 6.4 3Z.O 111.30 1, 140. 74 

p - 75 Mudstone, phosphatic VEM-368-47 0.4 9.6 10.5 3.6 -- 10.0 59.6 111.70 1, 144. 58 

p - 74 Mudstone VEM-367-47 1. 1 3. 5 11.7 3.5 -- 6. 7 78.7 liZ. 80 1, 148.43 

p - 73 Mudstone, phosphatic VEM-366-47 0.9 14.0 8.0 3.0 -- 11.8 45.9 113.70 1, 161. 03 

p - 7Z Mudstone VEM-365-47 1. 3 0.9 4.0 3. 6 -- 8.6 84.1 115.00 1, 16Z. ZO 

p - 71 Mudstone VEM-364-47 0.8 4.8 11.0 3.5 -- s.z 74.6 115.80 1, 166. 04 

p - 70 Phosphate rock, argillaceous VEM-363-47 0.4 17. 1 5. 3 Z.4 -- 19.7 Z6.7 116.ZO 1, 17Z. 88 

p - 69 Phosphate rock VEM-36Z-47 0.7 Z4.3 3.3 1.4 -- 17. 9 14.9 116.90 1, 189. 89 

p - 68 Mudstone, phosphatic VEM-361-47 0.8 11. 1 8.7 z. 7 -- 14.0 50.7 117.70 1, 198. 77 

p - 67 Mudstone, phosphatic VEM-360-47 1.0 13. 3 7. 9 z. 7 -- 17.Z 40.7 118.70 1, Z1Z. 07 

p - 66 Mudstone, phosphatic VEM-359-47 0.8 8. z 10.6 3.5 -- 14.5 55.0 119.50 1,Zl8.63 

p - 65 Mudstone, phosphatic VEM-344-47 0.4 9. 1 9.6 3~ 3 -- ·z5.z 36.8 119.90 1, ZZZ. Z7 

p - 64 Mudstone, calcareous, phosphatic VEM-343-47 1. 8 10. 1 7. 7 z. 9 -- Z1.5 36.7 lZl. 70 1, Z40. 45 

p - 63 Phosphate rock, calcareous, 

- argillaceous VEM-34Z-47 1. z 13. 7 5. 3 z.z 19.Z Z7.6 1ZZ.90 1, Z56. 89 ..., P - 6Z Mudstone, calcareous, phosphatic VEM-341-47 1. 6 7. 9 8.0 z. 7 -- 18.9 40.7 1Z4.50 1, Z69. 53 

p - 61 Mudstone, calcareous; fos. col. no. 47-HW-241 VEM-340-47 0.4 5. 7 10.6 3.3 -- 15.Z 5Z.3 1Z4.90 1, Z71. 81 

P - 60 Limeston~ fos. col. no. 47-HW-Z40 VEM-339-47 0.5 o. 3 z.o 0.8 -- 40.6 11.9 1Z5. 40 1, Z71. 96 

P - 59 I Limestone; fos. col. no. 47-HW-Z39 VEM-338-47 1. 5 o. 3 1. 4 0.4 -- 40.8 11.3 1Z6.90 1,Z7Z.41 

P - 581 Mudstone, calcareous; fos. col. no. 47-HW-Z38 VEM-337-47 1. 1 1. 8 11.9 3.4 -- 13.7 65.6 1Z8.00 1, Z74. 39 

p - 57 Limestones fos. col. no. r 

47-HW-Z37 VEM-336-47 3.6 0.3 1. 9 0.5 -- 38.5 17.4 131.60 1,Z75.47 

p - 56 Chert; fos. col. no. 47-HW-Z36 VEM-335-47 0.3 1. 0 Z.4 3. 5 -- 5.0 85.1 131.90 1, Z75. 77 

P - 55 Mudstone; fos. col. no. 47 .. HW-Z35 VEM-334-47 l.O 1. 8 7.6 z. 6 -- 6.9 81. 1 13Z.90 1, Z77. 57 

P - 54 I Mudstone, calcareous VEM-333-47 1. 5 z. 9 11.7 3.3 -- lZ.. 1 68.9 134.40 l,Z81.9Z. 

p - 53 Mudstone VEM-33Z-47 1. 7 1. 7 11.7 3,5 -- 10.0 76.6 136.10 I,Z84,81 

p - 5Z Mudstone, calcareous VEM-331-47 1. 6 4. 1 9.Z Z.9 -- 19.0 48.6 137.70 1.Z91.37 

p - 51 Mudstone; fos. col. no. 47-HW-Z34 VEM-330-47 1. z 3. 7 10.3 3. 1 -- 9.1 7Z.6 138.90 1,295.81 

p - 50 Mudstone VEM-3Z9-47 1. 6 6.8 11. 1 3.4 -- 9 .. Z 64.3 140.50 1, 306.69 

p - 49 Mudstone VEM-3Z8-47 1. 7 1. 6 11.4 3. 6 -- 8. 5 81.0 14Z.20 1,309.41 
Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x Rock description no. (feet) P2o5 Al2o 3 Fe2o 3 F Loss on Acid thickness percent P.zOs no. ignition insoluble (feet) (cumulatlVeJ 

p - 48 Mudstone~ phosphatic RMC-104-47 z.o 10. 7 11.0 3. 7 -- 11.5 52.6 144.2 1, 330.81 

p - 47 Mudstone RMC-103-47 0.9 4.0 11.5 3. 5 -- 8.9 73.7 145.1 1#334.41 

p - 46 Mudstone and calcareous 

mudstone RMC-102-47 1. 4 5. 1 11.6 3.9 -- 10.8 64.0 146.5 I, 341. 55 

p - 45 Limestone; fos. col. no. 47-HW-233 RMC-101-47 1.1 o. 6 2.3 1. 1 -- 38.6 14.3 147.6 1#342.21 

p - 44 Mudstone, calcareous and 

phosphatic# calcareous 

mudstone RMC-100-47 1. 8 14.6 9.2 3.2 -- 12. 1 41.9 149.4 1# 368. 49 

p - 43 Phosphate rock, argillaceous RMC- 99-47 0.6 21.7 5. 1 1. 8 -- 14.3 24.4 150.0 1,381.51 

p - 42 Phosphate rock, argillaceous, 

calcareous RMC- 98-47 0.5 14.7 7. 9 2.5 -- 17.0 33.4 150.5 1# 388. 86 

p - 41 Mudstone, calcareous, phosphatic RMC- 97-47 1.5 8. 0 7. 5 2. 7 -- 18.5 44.0 152.0 1# 400. 86 

p - 40 Mudstone# phosphatic VEM-327-47 0.8 12.2 8.9 3.2 -- 11.8 49.8 152.8 1, 410. 62 

p - 39 Phosphate rock, argillaceous VEM-326-47 0.8 16.3 9.4 2. 5 -- 11.7 38.9 153.6 1, 423.66 

p - 38 Phosphate rock, argillaceous, 

contains limestone lens at top VEM-325-47 1.2 15. 5 7.8 z.. 5 -- 15.2 34.4 154.8 1, 442. 26 

-- Limestone lens between bed P-38 

and bed P-37 VEM-324-47 (0. 0-1. 1) o. 7 0.6 0.2 -- 42.7 3. 1 -- 1, 442. 26 

p - 37 Mudstone, phosphatic, calcareous VEM-323-47 1.5 11. 1 10. 1 3.2 -- 13.5 49.4 156.3 1,458.91 

p - 36 Mudstone, phosphatic, calcareous VEM-322-47 1. 5 10.6 10.5 3.2 -- 15. 1 47.4 157.80 1,474.81 

-

CD 

p - 35 Phosphate rock, argillaceous, 

calcareous VEM-321-47 0.7 15.2 6.3 2. 7 -- 16.1 36.2 158.5 1, 485. 45 

p - 34 Phosphate rock; fos. col. no. 47-HW-232 VEM-320-47 1.6 27. 1 2.8 1.2 -- 14. 1 11.3 160.1 1# 528.81 

p - 33 Phosphate rock, argillaceous VEM-319-47 0.8 16.5 4.3 2. 5 -- 25.5 23.1 160.9 1, 542.01 

p - 32 Phosphate rock VEM-318-47 0.8 30.8 1. 4 1. 6 -- 10.7 6.8 161.7 1, 566. 65 

p - 31 Phosphate rock VEM-317-47 1. 2 26. 1 2.8 1. 5 -- 11. 1 17.8 162.9 1, 597.97 

p - 30 Limestone VEM-316-47 1. 6 2. 7 1.8 0.7 -- 38.6 11.9 164.5 1,602.29 

-- Limestone lens, argillaceous, 

phosphatic, in bed P-29 VEM-315-47 (0. 0-0. 8) 10.2 4.6 1. 3 -- 2.2.4 31.0 -- -- p - 29 Limestone, argillaceous, 

phosphatic VEM-314-47 0.8 10. 1 4.9 1. 3 -- 22. 1 31.3 165.3 1.,610.37 

p - 2.8 Mudstone, calcareous., phosphatic VEM-313-47 2. 7 9.6 7.6 2.3 -- 16.3 42.4 168.0 1, 636. 29 

p - 27 Limestone VEM-312-47 1.8 1. 1 3. 1 1. 3 -- 36.9 19.8 169.8 1,638.27 

p - 26 Phosphate rock., calcareous., 

argillaceous VEM-311-47 0.9 16.8 3.2 1. 1 1. 49 18.6 21.0 170.7 1, 653. 39 

p - 2.5 Phosphate rock RAW- 60-47 0.8 28.6 2. 2 1.0 2.86 10.3 14.7 171.5 1, 676. 27 

p - 2.4 Phosphate rock RAW- 59-47 0.8 29.2 1.8 0.6 2.82 11.5 10.7 172.3 1, 699. 63 

p - 23 Phosphate rock RAW- 58-47 1. 4 27.7 2.4 1.1 2.48 10.8 15.2 173.7 1# 738. 41 

p - 22 Phosphate rock, argillaceous RAW- 49-47 1. 3 18.6 5.4 2.0 1.94 9.4 37.6 175.0 1, 762. 59 

P - 21 Limestone, argillaceous; fos. 

col. no. 47-HW-224 RAW- 48-47 1.2 3. 0 2.9 1. 6 0.31 29.9 25.6 176.2 1, 766. 19 
p - 20 Phosphate rock RAW- 47-47 0.9 32.5 1. 3 0.8 3. 30 ' 8.8 6.8 177. 1 1. 795.44 

p - 19 Phosphate rock RAW- 46-47 2. 1 28.7 2.5 0.9 2.47 9.4 14. 1 179.2 I. 855. 71 

-- Limestone lens in bed P-18 RAW- 45-47 (o. s) 1. 3 0.4 0.2 -- 41.0 3.8 -- -- p - 18 Phosphate rock RAW- 44-47 2.0 26.2 2.5 1. 3 2. 50 10.0 19.8 181.2 1. 908. 11 

p - 17 Phosphate rock. argillaceuus RAW- 43-47 1.7 23.1 4.1 1. 3 2.16 11.0 23.4 182.9 1.947.38 

p - 16 Limestone. phosphatic RAW- 42-47 0.9 8. 9 1. 3 0.7 0.86 32.6 7.8 183.8 I. 955.39 

p - 15 Limestone RAW- 41-47 0.8 2. 0 2. 5 0.7 -- 40.6 8. 2 184.6 I. 956. 99 

p - 14 Phosphate rock RAW- 40-47 1. 5 26.9 3.2 o. 7 2.55 9.9 16.7 186.1 I. 997. 34 

p - 13 Phosphate rock, calcareous. 

fos. col. no. 47-HW-223 RAW- 39-47 1. 4 20.2 2.8 1.0 2.04 15.5 18.2 187.5 2,025.62 

P - 12 Limestone. phosphatic, fos. col. no. 47-HW-222 RAW- 38-47 1. 5 10.5 0.8 1.2 1. 06 31. 1 8.4 189.0 2,041.37 

p - 11 Phosphate rock RAW- 37-47 1.0 32.6 1.24 o. 4 2.67 8. 5 4.0 190.0 2, 073.97 

p - 10 Phosphate rock RAW- 36-37 1.1 32.4 0.94 o.s 3.21 9.8 3.8 191. 1 2. 109.61 

p - 9 Phosphate rock RAW- 35-47 1. 2 32.0 1. 1 0.8 3. 17 10.7 3. 7 192.3 2, 148.01 

p - 8 Phosphate rock RAW- 34-47 1. 1 32.4 0.98 o. 6 3.24 9.9 3.3 193.4 2, 183.65 

p - 7 Phosphate rock RAW- 33-47 0.6 30. 1 1.4 0.9 3.07 13.0 5.2 194.0 2, 201. 71 

-

p - 6 Phosphate rock RAW- 32-47 1.4 31.0 1.4 0.8 3.17 8.3 8.9 195.4 2. 245. 11 

p - 5 Mudstone, calcareous RAW- 31-47 1. 2 3. 8 9.8 3.5 -- 13.2 64.0 196.6 2. 249. 67 

p - 4 Limestone. argillaceous RAW- 30-47 2. 6 o. 4 4.2 2.0 -- 29.5 34.5 199.2 2, 250. 71 

p - 3 Mudstone, calcareous RAW- 29-47 2.3 o. 7 8.0 2. 3 -- 15.5 61.4 201.5 2, 252.32 

p - 2 Phosphate rock, argillaceous RAW- 28-47 0.2 20.a 5.6 1.8 -- 6. 1 30.9 201.7 2.256.48 -D 

p - 1 Phosphate rock, fos. col. no. 47-HW-221 RAW- 61-47 0.4 29.6 1.1 0.6 2.90 8.0 7. 8 202.1 2.268.32 

Wells formation 

Cw- 1 Limestone, fos. col. no. 47-HW-220 -- 4.6 -- -- -- -- -- -- -- -- Cw- 2 Phosphate rock -- 0.2 -- -- -- -- -- -- -- --
N 

0 

SPECTROORAPHIC ANALYSES-MABIE CANYON, IDAHO. LOT NO. 1210. 

Semi-quantitative analyses of samples of the Phosphoria formation, Mabie Canyon, Idaho (see immediately preceding pages for location of 

:ction, thickness and description of strata, and chemical analyses of samples), made by U. S. Bureau of Mines Laboratory, Albany, Oregon. In 

ddition to the elements listed in the table below, Sb, As, Ba., Be, Bi, Cd, Cb, Ga, Ge, Au, In, Pb, Li, Hg, Pt, Ta, Sn, and W were looked for n all samples but were not detected. 

Bed Sample no. Al no. 

R - 5 VEM-470-47 c 

R - 4 VEM-469-47 c 

R - 3 VEM-468-47 c 

R - 2 VEM-467-47 c 

R - 1 VEM-466-47 -- p -170 VEM-465-47 c 

p -169 VEM-464-47 c 

p -168 VEM-463-47 c 

p -167 VEM-462-47 c 

p -166 VEM-461-47 c 

-- VEM-460-47 c 

p -165 VEM-459-47 c 

p -164 VEM-458-47 c 

p -163 VEM-457-47 c 

p -162 VEM-456-47 c 

p -161 VEM-455-47 c 

p -160 VEM-454-47 c 

p -159 VEM-453-47 c 

p -158 VEM-452-47 c 

p -157 VEM-451-47 c 

p -156 VEM-450-47 c 

p -155 VEM-449-47 c 

p -154 VEM-448-47 D 

p -153 VEM-447-47 c 

p -152 VEM-446-47 c 

p -151 VEM-445-47 D 

p -150 VEM-444-47 c 

p -149 VEM-443-47 c 

p -148 VEM-442-47 c 

Explanation of symbols 

B 

F 

F 

F 

F 

A = more than 1 0 percent 

B = 5-10 percent 

C • 1-5 percent 

D"' 0. 1-1 percent 

Ca Cr Co Cu 

c E ND G 

A E ND G 

c E ND G 

A E ND G 

-- -- -- -- --

F A E ND G 

F A E ND G 

F c E ND G 

F c E ND G 

F c E ND G 

F A E ND G 

F c E ND G 

F c E ND G 

F c E ND G 

F c E ND G 

F A E ND G 

F c E ND G 

F c E ND G 

F A E ND G 

F c E ND G 

F A E ND G 

F c E ND G 

F c E ND G 

F c E ND G 

F c E ND G 

F A E ND G 

F A E ND G 

F c E ND G 

F A E ND G 

E = 0. 01-0. 1 percent 

F a 0. 001-0.01 percent 

G = less than 0. 001 percent 

ND = not detected 

Fe Mg Mn Mo Ni Si 

c c E F E A 

c c E F E A 

c D E F E A 

c c E F E A 

-- -- -- -- -- -- c D E F, E A 

c D E F E A 

c D E F E A 

c D E F E A 

c D E F E A 

c c E F E B 

c D E F E A 

c c E F E A 

c D E F E A 

c D E F E A 

c c E F E c 

c D E F E A 

c D E F E A 

c c E F E A 

c D E F E A 

c D E F E A 

c D E F E A 

c D E F E c 

c D E F E A 

c D E F E A 

c D F F E c 

c D F F E c 

c D F F E A 

c D E F E B 

Ag Na Sr Ti v Zn 

G E F E E ND 

G E F E E ND 

G E F E E ND 

G E F E E E 

-- -- -- -- -- --

G E F E E E 

G E E E E E 

G E F E E E 

G D F E D E 

G D F E E E 

G E F E E E 

G E F E E E 

G E F E E ND 

G D F E E ND 

G D F E E ND 

G E F E E ND 

G D F E E ND 

G D F E E ND 

G E F E E ND 

G D F E E ND 

G E E E E E 

G D F E E E 

ND ND F E E N 

G D F E E E 

G D F E E E 

G E E E E E 

G E E E E E 

G E F E E E 

G E E E D E 

Zr 

E 

E 

E 

E 

--

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 

E 
p -147 VEM-441-47 c F A E ND G c D E F E B G E E E D E E 

p -146 VEM-440-47 c F A E ND G c D E F E c G E E E D E E 

p -145 VEM-439-47 c F A E ND G c D E F E A G D E E D E E 

p -144 VEM-438-47 c F A E ND G c D E F E c G E E E D E E 

p -143 VEM-437-47 c F A E ND G c D E F E A G D E E D E E 

p -142 VEM-436-47 c F A E ND G c D E F E A G D E E D E E 

p -141 VEM-435-47 c F A E ND G c D E F E A G E E E D E E 

p -140 VEM-434-47 c F B E ND G c D E F E A G E E E E E E 

p -139 VEM-433-47 c F A E ND G c D F F E c G E E E D E E 

p -138 VEM-432-47 c F A E ND G c D F F E c G E E E D E E 

p -137 VEM-431-47 c F A E ND G c D F F E A F E E E D E E 

-- VEM-430-47 c F A E ND G D c F F E c G E E E D E E 

p -136 VEM-429-47 c F A E ND G c D E F E A F E D E D E E 

p -135 VEM-428-47 c F A E ND G c D E F E A F E D E D E E 

p -134 VEM-427-47 c F A E ND G c D E F E A F E D E D E E 

p -133 VEM-426-47 ,.., F A E ND G c D E F E A F E D E D E E '-' 

p -132 VEM-425-47 c F A E ND G c D E F E A F D D E D E E 

p -131 VEM-424-47 c F A E ND G c D E F E A F E D E D E E 

p -130 VEM-423-47 c F A E ND G c D E F E A F E D E D E E 

p -129 VEM-422-47 c F A E ND G c D E p E A F E D E D E E 

p -128 VEM-421-47 c F A E ND G c D E F E A F D E E D E E 

p -127 VEM-420-47 c F A E ND G c D E F F A F D E E D E E N p -126 VEM-419-47 c F A D ND G c D E F E A F D E E D E E - p -125 VEM-418-47 c F A D ND G c D E F E A F D E E D E E 

p -124 VEM-417-47 c F A D ND G c D E F E A F D D E D E E 

p -123 VEM-416-47 c F A E ND G c D E F E A G D E E D E E 

p -122 VEM-415-47 c F A E ND G c c E F E A G D E E D E E 

p -121 VEM-414-47 c F A E ND G c D E F E A G D D E D E E 

p -120 VEM-413-47 c F A D ND G c D E F E A G D E E D E E 

p -119 VEM-412-47 c F A E ND G c D E F E A G D D E D E E 

p -118 VEM-411-47 c F A E ND G c D E F E A G D D E D E E 

p -117 VEM-410-47 c F B E ND G c D E F E A G D E E D E E 

p -116 VEM-409-47 c F A E ND G c D E F E A G D E E D E E 

p -115 VEM-408-47 c F A E ND G c D E F E A G D E E D E E 

p -114 VEM-407-47 c F A E ND G c D E F E A G D E E D E E 

p -113 VEM-406-47 c F A E ND G c D E F E A G D E E E E E 

p -112 VEM-405-47 c F A E ND G c D E F E A G D D E E E E 

p -111 VEM-404-47 c F c E ND G c D E F E A G D E E E E E 

p -110 VEM-403-47 c F A E ND G c D E F E A G D E E E E E 

p -109 VEM-402-47 c F A E ND G c D E F E A G D E E E E E 

p -108 VEM-401-47 c F A E ND G c D E F E A G D E E E E E 

p -107 VEM-400-47 c F c E ND G c D E F E A G D E E E ND E 

p -106 VEM-399-47 c F A E ND G c B E F E B G D E E E E E 

p -105 VEM-398-47 c F c E ND G c D E F E A G D E E E E E 

p -104 VEM-397-47 c F A D ND G c D E F E A F D E E D E E 
N 

N 

Bed 

no. 

p -103 

p -102 

p -101 

p -100 

p - 99 

p - 98 

p - 97 

p - 96 

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 

Sample no. 

VEM-396-47 

VEM-395-47 

VEM-39.-47 

VEM-393-47 

VEM-392-·7 

VEM-391-47 

VEM-390-·7 

VEM-389-47 

VEM-388-47 

VEM-387-47 

VEM-386-47 

VEM-385-47 

VEM-384-47 

VEM-383-47 

VEM-382-47 

VEM-381-47 

VEM-380-47 

VEM-379-47 

VEM-378-47 

VEM-377-47 

VEM-376-47 

VEM-375-47 

VEM-374-47 

VEM-373-47 

VEM-372-47 

VEM-371-47 

VEM-370-47 

VE:U-369-47 

VEM-368-47 

VEM-367-47 

VEM-366-47 

VEM-365-·7 

VEM:-364-47 

VEM-363-47 

VEM-362-47 

VEM.:.361-47 

VEM-360-·7 

VEM-359-47 

VEM-344-47 

VEM-343-·7 

VEil-342-4 7 

Al B Ca 

c F B 

c F c 

c F c 

c F B 

c F A 

c F c 

c F c 

c F c 

c F c 

c F A 

c F B 

c F A 

c F B 

c F A 

c F c 

c F B 

c F c 

c F A 

c F c 

c F c 

c F A 

c F A 

c F B 

c F c 

c F A 

c F A 

c F c 

c F A 

c F c 

c F c 

c F A 

c F c 

c F c 

c F A 

c F A 

c F A 

c F A 

c F B 

c F B 

-- -- --

c F A 

Cr Co Cu Fe Mg Mn 

D ND G c D E 

E ND G c D E 

E E G c D E 

E ND G c c E 

E ND G c D E 

E ND G c D E 

E ND G c D E 

E ND G c D E 

D ND G c D E 

E ND G c D E 

E ND G c D E 

D ND G c D E 

D ND G c D E 

E ND G c D E 

E ND G c D E 

E ND G c D E 

E ND G c D E 

E NO G c c E 

E ND G c D E 

E ND G c D E 

E ND G c c E 

E ND G c D E 

E ND G c D E 

E NO G c 0 E 

E ND G c D E 

E ND G c D E 

E ND G c 0 E 

E ND G c 0 F 

E ND G c D F 

E ND G c D E 

D ND G c D F 

E ND G c D E 

E ND G c D E 

D ND G c D F 

E ND G c D F 

E ND G c D E 

E ND G c D E 

E ND G c D E 

D ND G c D E 

-- -- -- -- -- -- D ND a c c E 

Mo Ni Si Ag Na Sr Ti v Zn Zr 

F E A G D E E D E E 

F E A G D F E E N E 

F E A G D F E E 'N E 

F E A G D F E D E E 

F E A F D E E D E E 

F E A F D E E D E E 

F E A G D F E D E E 

F E A G D E E D E E 

F E A G D E E D E E 

F E A G D D E D E E 

F E A G D E E D E E 

F E A F D E E D E E 

F E A F D E E D E E 

F E A F D D E D E E 

F E A F D E E D E E 

F E A G D E E E ND E 

F E A G D F E E ND E 

F E A G D F E E ND E 

F E A G D F E E ND E 

F E A G D F D E ND E 

F E A G D F E E NO E 

F E A G D E E E NO E 

F E A G 0 E E E ND E 

F E A G D F D E ND E 

F E B G D D E E ND E 

F E A G D D E E ND E 

F E A G D F D E ND E 

E E A G D E E E ND E 

F E A G D F E E ND E 

F E A G D F E D ND E 

F E A G D E E E ND E 

F E A G D F D E ND E 

F E A G D F D E ND E 

F E A G E E E E E E 

F E c G E E E E E E 

F E A G D E E E E E 

F E A G D E E E E E 

F E A F D D E E E E 

F E A F E E E D E E 

-- -- -- -- -- -- -- -- -- -- E E A G D E E D E E 
p - 62 VEM-3·1-47 c F A E ND G c c E E E A G D E E D E I E 

p - 61 VEM-34C·o&7 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -· p .. 60 VE.M-339 -47 c F A E ND G D B E F E c G E F E E ND E 

p - 59 VEM-338-47 c F A E ND G D B E F E c G E F E E ND E 

p - 58 VEM-337-47 c F c E ND G c c E F E A G D F E E E E 

p - 57 VEM-336-47 c F A E ND G c B E F E B G E F E E ND E 

p - 56 VBM-335-47 c F c E ND G D D E F E A G E F E E E E 

p - 55 VEM-334-47 c F c E ND G c D E F E A G D F E E E E 

p - 54 VEM-333-47 c F c E ND G c D E F E A G D F D D E E 

p - 53 VEM-332-47 c F c E ND G c D E F E A G D F D D E E 

p - 52 VEM-331-47 c F A E ND G c D E F E A G D E D E E E 

p - 51 VEM-330-47 c F c E ND G c D E F E A G D E D E E E 

p .. 50 VEM-329-47 c F A E ND G c D E E E A G D E D E E E 

p - 49 VEM-328-47 c F c E ND G c D E F E A G D F D E ND E 

p - 48 RMC-104-47 c F B E ND G c D F F E A G D E E E E E 

p - .7 RMC-103-47 c F c E ND G c D F F E A G D F E E E E 

p - 46 RMC-102-47 c F c E ND G c D F F E A G D F E E E E 

p - 45 RMC-101-47 c F A E ND G c c F F E c G D E E E E E 

p - 44 RMC-100-47 c F A E ND G c D F F E A G D E E E E E 

p - 43 RMC- 99-47 c F A D ND G c D F F E A G D E E E E E 

p - 42 RMC- 98-47 c F A E ND G c D F F E A G D E E E E E 

p - 41 RMC- 97-47 c F A E ND G c c F F E A G D E E E E E 

N p - 40 VEM-327-47 c F A E ND G c D E F E A G D E D E E E ~ p - 39 VEM-326-47 c F A E ND G c D F F E A G D E E E E E 

p - 38 VEM-325-47 c F A E ND G c D E E E A G D E E D E E 

VEM-324-o&7 -- -- -- -- -- -- -- -- -· 

p - 37 VEM-323-47 c F A E ND G c D E E E A G D E D D E E 

p - 36 VEM-3ZZ-47 c F A E ND F c D E E E A G D E D D E E 

p ... 35 VEM-321-47 c F A E ND F c D E E E A G D E E D E E 

p - 34 VEM-320-47 c F A D ND F c D F F E B F D E E D E E 

p - 33 VEM-319-47 c F A D ND E c D F E E A F E E D c E E 

p - 32 VEM-318-47 c F A E ND G c D F E E c G E E E D E E 

p - 31 VEM-317-47 c F A E ND G c D F E E c G E E E D E E 

p .. 30 VEM-316-47 c F A E ND G c B E F E B G E F E D E E 

VEM-315-47 c F A E ND G c c E F E A G D F E D E E 

p - 29 VEM-314-47 c F A E ND G c c E F E A G D F E D E E 

p - 28 VEM-313-47 c F A E ND G c c E F E A G E F E D E E 

p - '27 VE:U:-31'2-4 7 c F A F ND G D B E F E A G D F E D ND E 

p - 26 VEM-311-•7 c F A E ND G c c F F E A G D E E D E E 

p - '25 RAW- 60-47 c F A E ND G c D F F E B F D E E D E E 

P - z• RAW- 59-·7 c F A E ND G c D F F E B G E E E D E E 

p - '23 RAW .. 58-•7 c F A E ND G c D F F E B G E E E D E E 

p .. Z'2 RAW- •9-·7 c F A E ND G c D F F E A G D E E D E E 

P - Zl RAW- 4:8-47 c F A E ND G c c F F E A G D F E D ND E 

p - zo RAW- •17-47 c F A E ND G c D F F E B G D E E D E E 
N 

~ 

Bed 

no. 

p - 19 

-- p - 18 

p - 17 

p - 16 

p ~~ 15 

p ._ 14 

p - 13 

p - lZ 

p - 11 

p - 10 

p - 9 

p - 8 

p - 7 

,P - 6 

p - 5 

p - 4 

p - 3 

p - 2 

p - 1 

Sample no. Al 

RAW- 46-47 c 

RAW- .tS-47 c 

RAW- 44-47 c 

RAW- 43-47 c 

RAW- 4Z-47 c 

RAW- 41-47 c 

RAW- 40-47 c 

RAW- 39-47 t c 

RAW- 38-47 c 

RAW- 37-47 c 

RAW- 36-47 c 

RAW- 35-47 c 

RAW- 34-47 c 

RAW- 33-47 c 

RAW- 3Z-47 c 

RAW- 31-47 c 

RAW- 30-47 c 

RAW- Z9·47 c 

RAW- 28-47 c 

RAW- 61-47 c 

B Ca Cr Co Cu Fe 

F A E ND G c 

F A E ND G D 

F A E ND G c 

F A E ND G c 

F A E ND G D 

F A E ND G D 

F A E ND G c 

F A E ND G c 

F A E ND G c 

F A E ND G D 

F A E ND G c 

F A E ND G c 

F A E ND G c 

F A E ND G c 

F A E ND G c 

F c E ND G c 

F A E ND G c 

F c E ND G c 

F A E ND G c 

F A E ND G c 

Mg Mn Mo Ni Si AI Na Sr Ti v Zn Zr 

D F F E A F D E E D E E 

D F F E c G E F E E ND E 

D F F E A F D E E D E E 

D F F E A p D E E D E E 

c F F E c G E p E D E E 

c F F E c G E F E D E E 

D F F E A F D E E D E E 

c F F E B F D F E E E E 

c F F E c G D F E D E E 

D F F E c G D E E D E E 

D F F E c G D E E D E E 

D F F E c G D E E D E E 

D F F E c G D E E D E E 

D F F E c G D E E D E E 

D F F E c G D E E D E E 

D F F E A G E F E D E E 

c E F E A G E F E D E E 

c E F E A G E F E D E E 

D E F E A G D F E D E E 

D F F E c G D E E E E E 
N 

U'l 

CONDA, IDAHO. LOT NO. 1200. 

Phosphatic shale member of Phosphoria formation sampled in 300 level east crosscut of Conda mine, sec. 13, T. a S., R. 42 E., Caribou County, 

Idaho, on west limb of Trail syncline. Beds strike N. 10° W., and dip 55° E. Section measured by F. C. Armstrong, R. A. Hoppin, and L. E. Smith and 

sampled by R. A. Gulbrandsen, 0. A. Payne, R. S. Sears, and R. P. Sheldon in July 1947. Samples analyzed by U.S. Bureau of Mines Laboratory, 

Albany, Oregon. 

Bed Sample Thickness Chemical analyses (percent) Cumulative Thickness x 

Rock description I I I I Loss on I Acla thickness percent P 2

0 no. no. (feet) P205 Al203 Fe203 V 2°s ignition insoluble (feet) (cumulative f 

Rex member of Phosphoria formation--basal beds only 

R - 4 Chert and mudstone -- 2.7 -- -- -- -- -- -- 2.70 -- R - 3 Limestone, cherty -- 1. 75 -- -- -- -- -- -- 4.45 -- R - 2 Chert, calcareous -- 3. 0 -- -- -- -- -- -- 7.45 -- R - 1 Mudstone, calcareous FCA-141-47 0.3 1. 3 5. 5 2.4 .045 a.6 56.3 7. 75 0.39 

Phosphatic shale member of Phosphoria formation 

p -142 Phosphate rock. cafareous; fos. 

col. no. 47-HW-12 FCA-140-47 o.a 24.0 1. a 1.3 • 025 16.2 15. 1 o.ao 19.20 

p -141 Mudstone, calcareous FCA-139-47 0.35 4.2 9.4 3. z .095 13. 2 54.4 1. 15 20.67 

p -140 Mudstone, calcareous; fos. col. 

no. 47-HW-11 FCA-13a-47 1. 7 1. 7 a.9 3.9 • 095 13.2 60.3 2.85 23.56 

p -139 J4udstone, calcareous FCA-137-47 0.75 5. 6 9.6 3. 1 • 03 15. a 51.5 3.60 27. 76 

p -13a Mudstone, calcareous; fos. col. no. 47-HW-10 FCA-144-47 4.9 1. 2 8.6 4.0 • 025 24.8 5a.6 a. 5o 33.64 

p -137 Limestone.. argillaceous; fos. col. 

47-HW-9 FCA-143-47 2.a 4. 1 4. 1 1.9 .015 13. 5 31.6 11.30 45. 12 

p -136 Phosphate rock, argillaceous FCA-142-47 0.25 24.6 5. 1 2. 3 .035 24.a 20.3 11.55 51.27 

p -135 Phosphate rock FCA-136-47 1. 35 2a.a 2.1 1.3 • oa a.4 12.3 12.90 90. 15 

p -134 Mudstone .. calcareous FCA-135-47 0.35 4.6 a.6 3.2 • 17 15. a 54.0 13.25 91.76 

p -133 Phosphate rock, calcareous; 

fos. col. no. 47-HW-a FCA-134-47 0.65 25.0 0.7 o.a .035 15. 3 5. 1 13.90 108.01 

p -132 Phosphate rock FCA-133-37 0.35 34.2 0.4 0.6 .06 a. 5 2. 3 14.25 119.98 

p -131 Phosphate rock FCA-132-47 0.55 26.9 2.2 1. 1 .14 13.5 9.9 14.80 134.78 

p -130 Phosphate rock FCA-131-47 0.85 33.4 0.5 o. 6 • 065 a.8 2.6 15.65 163. 17 

p -129 Phosphate rock FCA-130-47 0.3 30. 1 1.9 1. 4 .06 7. 7 11.3 15.95 172.20 

p -128 Phosphate rock, calcareous FCA-129-47 o.a 22.3 1. a 1.2 .04 13.a 14.3 16.75 190.04 

p -127 Phosphate rock FCA-12a-47 0.75 32.4 1. 0 1.0 • 09 7.4 5.2 17.50 214.34 

p -126 Phosphate rock, calcareous near 

base FCA-127-47 0.75 26.9 2.4 1. 5 . 09 a. 1 15.0 18.25 234.52 

p -125 Phosphate rock FCA-126-47 0,35 26.5 2. 5 1. 6 • 13 9.6 15.3 18.60 243.80 

p -124 Limestone, phosphatic FCA-125-47 0.65 7. 8 1. 5 o. 7 .03 31.0 11.7 19.25 248.a7 

p -123 Phosphate rock, calcareous FCA-124-47 o.a 24.2 1.4 0.8 .oa 15. a 6.9 20.05 268.23 

1 Fossil collection by H. Wedow, Paleontology and Stratigraphy Branch, U. S. Geological Survey. 
N 

oBed 

no. 

p -122 

p -1Z1 

P -lZO 

p -119 

p -118 

p -117 

p -116 

p -115 

p -114 

p -113 

p -112 

p -11I 

p -110 

p -109 

p -I08 

p -I07 

p -106 

p -105 

p -I04 

p -103 

p -102 

p -101 

p -100 

p - 99 

p - 98 

p - 97 

p - 96 

p - 95 

p - 94 

p - 93 

p - 92 

p - 91 

p - 90 

p - 89 

p - 88 

p - 87 

p - 86 

Rock description 

Mudstone and phosphate rock 

Phosphate rock, calcareous 

Limestone, phosphatic 

Limestone, argillaceous 

Mudstone, calcareous 

Mudstone, calcareous 

Mudstone 

Limestone, argillaceous 

Mudstone 

Mudstone 

Limestone, phosphatic, 

argillaceous 

Mudstone, phosphatic, calcareous 

Limestone, phosphatic 

Limestone, phosphatic 

Limestone, phosphatic 

Limestone, phosphatic 

Phosphate rock, argillaceous, 

calcareous 

Limestone, argillaceous 

Mudstone, calcareous, phosphatic 

Mudstone, phosphatic, calcareous 

Mudstone, calcareous 

Mudstone 

Phosphate rock, argillaceous, 

calcareous 

Mudstone, calcareous 

Mudstone, calcareous 

Mudstone, calcareous, phosphatic 

Mudstone, calcareous 

Mudstone, calcareous 

Limestone 

Mudstone, calcareous 

Mudstone, calcareous, phosphatic Mudston~, phosphatic, calcareous 

Mudstone, calcareous 

Mudstone, calcareous 

Phosphate rock, argillaceous, 

calcareous 

Mudstone 

Phosphate rock, argillaceous, 

calcareous 

Sample Thickness. 

no. (feet) P20s 

FCA-123-47 0.6 17.5 

FCA-1Z2·47 0.7 20.0 

FCA-121-47 1. 1 15.6 

FCA-120-47 0.9 6. 7 

FCA-119-47 0.7 3. 0 

FCA-118-47 0.25 I. 0 

FCA-117-47 0.4 1. I 

FCA-116·47 0.4 1. 9 

FCA-ll5-47 0.65 4. 7 

FCA-114-47 o. 3 I. 8 

FCA-11I-47 0.75 14. 1 

FCA-Il0-47 0.6 12.5 

RAH-146-47 0.6 18.4 

RAH-I45-47 2. 2 8.9 

RAH-I44-47 3.5 lZ. 8 

RAH-143-47 2. 1 13.8 

RAH-142-47 1.6 14.5 

RAH-141-47 2. 1 2. 6 

RAH-I40-47 1. 3 10.8 

LES -243-47 1. 8 11.6 

LES-242-47 4.2 4. 5 

LES-241-47 1. 9 2.4 

LES-240-47 0.6 16.2 

LES -239-47 2.4 1. 4 

FCA-109-47 0.9 2. 7 

FCA-108-47 1.4 8.0 

FCA-107-47 2.0 6. 5 

FCA-106-47 3.0 4.3 

FCA-105-47 1. 8 o. 5 

FCA-104-47 1. 1 5. 5 

FCA-103-47 0.8 7. 8 

FCA-102-47 0.7 11.3 

FCA-101-47 2. 7 3. 8 

FCA-100-47 2.5 3. 8 

FCA- 99-47 1.15 14.0 

FCA .. 98-47 1. 3 5. 7 

FCA- 97-47 1.;1 14. 1 

Chemical analyses (percent) Cumulative Thickness x 

Al2°3 Fe2o 3 v2os 

Loss on ACid thickness percent ~05 ignition insoluble (feet) (cumula ve1 

4.8 2. 0 • 24 14.0 28.1 20.65 278.73 

2.6 1. 5 • 19 16.2 16.0 21.35 292.73 

0.9 0.8 • 08 25.0 6.7 22.45 309.87 

4.8 2. 0 • 25 23.0 31.0 23.35 315.92 

7. 3 2.9 .36 22.0 ..... 6 24. OS 318.02 

7.4 3. 7 .49 23.5 ""·' 24.30 318.27 

7.9 4. 1 .42 21.0 50.4 2-i.70 318.71 

7.0 3.0 • 36 22.8 46.0 25.10 319.47 

7. 5 3.4 .33 18.7 <l9.4 zs. 75 3U.53 

8.9 3. 2 .4I 2I. 7 51.3 26.05 323.07 

3.9 1. 7 .l8 24. I 2I. 6 26.80 333.65 

6.2 2. 4 • 30 14.8 4I.4 27.40 34I.I5 

0.4 0.4 0.95 9.6 4.3 28.00 352.19 

1. 6 1. 0 • 12 24.4 11. 1 30.20 371.77 

2.9 1. 4 .22 36.6 15. 7 33.70 416.57 

3.5 I. 5 .3I 28.7 I9. 1 35.80 445.55 

5.4 2. 2 .09 24.6 33.1 37.40 468.75 

4.6 2. 2 .04 18.6 35.0 39.50 474.21 

6. 7 2.4 .015 26.7 37.6 40.80 488.25 

6. 5 2. 5 .055 18.9 40.6 42.60 509.13 

7. 3 3.3 .02 11.5 59.1 46.80 528.03 

7. 3 3.3 .015 11. 1 75. 1 38.70 532.59 

5. 2 3. 2 .024 lZ. 5 35.6 49.30 542.31 

7.6 3.0 • 018 15. 3 64.0 51.79 545.67 

8.5 2. 8 .02 12.6 70.8 52.60 548.10 

7. 1 3. 0 .025 1Z.8 55.9 54.00 559.30 

5.9 2.4 .03 15.2 55.9 56.00 572.30 

8.1 3.2 .03 13.0 65.8 59.00 585.20 

2.2 1. 2 .015 35.9 19.1 60.80 586.10 

7. 6 2.8 • 025 18.2 60.8 61.90 592.15 

5.1 2.4 • 025 14.6 53.4 62.70 598.39 

5.9 2.4 • 03 15.8 43.2 63.40 606.30 

8.2 3. 1 .025 14.6 61. 1 66.10 616.56 

7. 3 2. 7 .03 18.8 51.9 68.60 626.06 

5. 3 3. 5 • 03 14.3 39.2 69.75 642.16 

s.s 2.7 • 04 18. 1 50.9 71.05 649.57 

4.0 1. 9 • 04 17. 0 36.6 72.15 665.08 
p - 85 Mudstone, calcareous FCA- 96-47 0.8 4.4 8. 6 3.2 • 04 15.8 60.4 72.95 668.60 

p - 84 Phosphate rock, argillaceous, 

calcareous LES-238-47 0.35 20.9 4.5 3.0 • 036 13.3 Z3.9 73.30 675.9Z 

p - 83 Mudstone, calcareous LES-237-47 0.9 3. 2 8.2 3.9 • 03 13. z 61.4 74.ZO 678.80 

p - 82 Mudstone LES-236-47 0.75 2. z 8.3 4.2 • 03 12.6 65.9 74.95 680.45 

p - 81 Limestone, ar1illaoeous LES -235-47 3.4 1. 1 4.8 2. 1 .018 26.0 34.5 78.35 614..19 

P - 80 Mudstone, calcareous and phosphate 

rock; fos. col. no. 47-HW-7 LES-234-47 0.45 19.4 4.1 2.8 • 018 11.3 26.6 78.80 692.91 

p - 79 Mudstone, calcareous LES -233-47 0.9 7. 4 7. 8 4.2 • 018 9.9 59.9 79.70 699.58 

p - 78 Mudstone LES -232-47 2.5 1. 2 9.7 4.4 • 018 9.5 76.2 82.20 702..58 

p - 77 Phosphate rock. argillaceous; 

fos. col. no. 47-HW-6 LES -231-47 0.35 18.5 4.4 4.0 • 018 10.8 29.2 82.55 709.06 

p - 76 Mudstone LES-230-47 1. 0 7. 3 8.3 5. 5 .018 9. 7 60.7 83.55 716.36 

p - 75 Mudstone LES -229-47 1. 3 2. 3 9.0 5. 1 • 03 8.4 75.0 84.85 719.35 

p - 74 Mudstone LES -228-47 2.3 5. 6 8.2 4.5 0 018 8.9 65.9 87.15 732.23 

p - 73 ·Limestone, argillaceous LES -227-47 1. 9 3. 2 7. 1 3.3 • 018 21. 7 43.6 89.05 738.31 

p - 72 Phosphate rock, araillaceous, 

calcareous LES-226-47 0.65 16.2 3. 5 4.1 .024 12.3 35.6 89.70 748.84 

p - 71 Phosphate rock. and mudstone LES-225-47 0.5 18.6 5.2 2. 8 • 03 16.0 27.3 90.20 758.14 

p - 70 Mudstone, calcareous LES-224-47 1. 0 1. 3 6.7 3.8 • 018 12. 1 54.3 91.ZO 759.44 

p - 69 Mudstone, phosphatic, calcareous LES ·223-47 0.35 14.5 5.9 3. 3 .03 12.0 41.4 91.55 764.52 

p - 68 Mudstone, calcareous LES -222-47 1. 8 1. 2 9. 1 4.2 • 043 10. 3 74.9 93.35 766.68 

p - 67 Limestone, phosphatic, 

argillaceous LES -221-47 1. 0 13.4 3. 2 2. 3 • 018 20.0 22.0 94.35 780.08 

~ p - 66 Mudstone, contains calcareous 

concretions near top LES-220-47 3.9 o. 6 10. 1 4. 0 • 015 8.8 77.6 98.25 782.42 

p - 65 Mudstone LES -219-47 3. 9 0.4 10.6 4.4 • 015 8.9 78.4 102. 15 783.98 

p - 64• Mudstone, phosphatic, calcareous LES-218-47 0.9 9. 3 9.0 4.1 .018 11.9 53.2 103.05 792.35 

p - 63 lludstone, calcareous LES -217-47 5.4 5. 8 8.4 3.6 .015 8.7 60.3 108.45 823.67 

p - 62 Limestone, phosphatic, 

argillaceous LES-216-47 1. 05 11.8 3.8 2. 2 .03 21.3 20.6 109.50 836.06 

p - 61 Mudstone, dolomitic FCA- 95-47 2.15 5.4 7. 0 2.7 .03 19.8 46.2 111.65 847.67 

P - 60 Limestone, argillaceous, 

phosphatic FCA- 94-47 1. 2 7. 7 5. 8 2.4 .03 21. 3 35.3 112.85 856.91 

p - 59 Limestone, argillaceous FCA- 93-47 2. 8 2. 8 4.4 1. 8 .015 28.7 29.2 115.65 864.75 

p - 58 Limestone, argillaceous FCA- 92-47 1.6 5. 3 3. 0 2.0 .035 28.3 27.8 117.25 873.23 

p - 57 Limestone, argillaceous FCA- 91-47 2. 2 6. 4 3. 5 1. 7 • 045 30.0 28.8 119.45 887.31 

p - 56 Limestone, arafllaceous FCA- 90-47 2. 6 4.5 4.9 2. 1 .03 26.8 33.7 1ZZ.05 899.01 

p .. 55 Limestone, argillaceous FCA- 89-47 3. 5 5. 5 4.8 2.4 • 025 28.2 27.2 125.55 918.26 

p - 54 Limestone, argillaceous FCA- 88-47 2. 9 5. 2 3. 2 2.9 .03 21.4 40.9 128.45 933.34 

p - 53 Dolomite, calcareous; fos. col. no. 47-HW-5 FCA- 87-47 3.2 o. 9 2.6 1. 3 • 03 37.5 17.6 131.65 936.22 

p - 52 )(udstone, calcareous FCA- 86-47 o. 9 z. 2 7.8 4.2 • 04 12.0 69.8 132.55 938.20 

P - 51 Mudstone., calcareous FCA- 85-47 2.3 2. 3 9.9 3.9 • 055 15.5 63.7 134.85 943.49 
N 

00 

p 

p 

p 

p 

p 

p 

p 

p 

Bed 

no. 

I - 50 

I - 49 

I - 48 

' - 47 

' - 46 

' - 45 

' - 44 

' - 43 

' - 42 

' - 41 

- 40 

- 39 

- 38 

- 37 

- 36 

- 35 

- 34 

- 33 - 32 

- 31 

- 30 

- 29 - 28 

- 27 

- 26 

- 25 

- 24 - 23 

- 22 

- 21 

- 20 

- 19 

- 18 

- 17 

- 16 

Sample Thickness Chemical anal~ses (percent) Cumulative Thickness x 

Rock description (feet) P205 Al2o3 Fe2o 3 v2o5 

Loss on Acid thickness percent P 0 no. 5 ignition insoluble (feet) (cumulat~el 

Mudstone. calcareous FCA- 84-47 4.2 3. 1 9.5 4.0 .01 14.0 64.1 139.05 956. 51 

Mudstone, calcareous. phosphatic LES -215-47 3.2 8.9 8.0 2. 9 • 024 13.8 45.8 142.25 984.99 

Limestone~ argillaceous; fos. col. 

no. 47-HW-4 LES -214-47 1. 6 2. 7 5.2 2. 1 .015 27.2 33.0 143.85 989.31 

Mudstone. phosphatic, calcareous LES -213-47 1. 1 11.8 8.2 3.0 .03 17.4 39.3 144.95 1, 002. 29 

Mudstone, phosphatic LES -212-47 2.0 12. 3 7. 2 2.4 • 03 18.8 33.4 146.95 1, 026. 89 

Limestone LES -211-47 1. 6 o. 3 2.9 1.2 • 015 36.5 16. 7 148.55 1,027.37 

Limestone, argillaceous LES -210-47 0.8 4. 5 5.6 2. 1 • 015 24.5 34.0 149.35 1, 030.97 

Mudstone, phosphatic, calcareous LES -209-47 o. 7 11.6 8.4 3.0 • 03 15. 1 44.2 150.05 1, 039. 09 

Mudstone, phosphatic., contains 

gypsum LES -208-47 0.45 13.7 8.5 2.6 .03 17. 0 37.0 150.50 1, 045. 26 

Phosphate rock LES -207-47 0.35 31.8 7. 1 2. 5 .03 17.9 3. 5 150.85 1, 056. 39 

Phosphate rock LES -206-47 1. 1 31.0 7.3 2.9 .03 18.4 3.8 151.95 1, 090.49 

Mudstone, phosphatic LES -189-47 0.7 12.8 8.3 2.9 .015 17.7 43.8 152.65 1, 099.45 

Possible shear zone, beds P-31 to P-38: rock structure largely destroyed; stratigraphic relations and thicknesses uncertain. 

Mudstone, phosphatic LES -188-47 0.8 13.5 8. 1 3. 1 . 015 19.0 39.3 153.45 1,110.25 

Limestone, dolomitic, argillaceous LES -187-47 0.5 1. 5 4.9 1. 2 .01 35.0 24.0 153.95 1, 111. 00 

Limestone, argillaceous, phosphatic LES -186-47 1.4 8. 1 6.6 2. 1 .01 24.7 31.8 155.35 1, 1Z2. 34 

Mudstone, phosphatic LES -185-47 0.8 12. 1 7. 8 2.9 .015 17.8 40.6 156. 15 1, 132. 02 

14udstone, calcareous LES -184-47 0.6 6.9 7.0 2. 5 .015 16.4 47.6 156.75 1, 136. 16 

Limestone1 argillaceous, phosphatic LES -183-47 1. 6 10. 1 7. 5 2.4 • 010 20.5 36.0 158.35 1,152.32 

Mudstone, phosphatic, calcareous LES-182-47 1. 3 11.9 7. 2 2. 5 • 015 18.3 36.7 159.65 1, 167.79 

Phosphate rock, calcareous LES -181-47 1. 2 18.2 4.2 1.6 .040 20.2 18.0 160.85 1, 189.63 

Phosphate rock, calcareous LES -180-47 0.4 15.7 4.4 1. 7 . 050 17.0 27.0 161. 25 1,195.91 

Phosphate rock, argillaceous FCA- 83-47 0.4 17.4 5.8 2. 8 . 065 12. 7 33.9 161.65 1, 202.87 

Phosphate rock, calcareous FCA- 82-47 1. 9 26.0 1. 5 1. 5 . 03 14. 1 8.8 163.55 1, 252. 27 

Limestone FCA- 81-47 2. 1 3. 5 1. 5 o. 7 .025 28.0 10.0 165.65 1, 259.62 

Mudstone, phosphatic FCA- 80-47 0.9 12.2 8.2 2.9 • 03 12.6 43.0 166.55 1, 270. 60 

Limestone, dolomitic FCA- 79-47 2.4 6.4 3.6 1. 5 . 03 29.4 21.0 168.95 1, 285.96 

Phosphate rock FCA- 78-47 2.5 26.3 2. 7 1. 4 • 12 10.0 17.3 171.45 1,351.71 

Phosphate rock FCA- 77-47 1. 8 29.3 2. 0 1. 2 • 26 10.4 12.2 173. 25 1, 404.45 

Phosphate rock. argillaceous, 

calcareous FCA- 76-47 2.5 17. 1 3.8 1. 7 . 13 15.5 25.4 175.75 1,447.20 

Phosphate rock FCA- 75-47 1. 4 29.6 1. 8 1. 0 . 19 10. 7 11. 1 177.15 1, 488.64 

Phosphate rock FCA- 74-47 1. 45 26.5 2.4 1. 5 .25 11.8 14.7 178.60 1, 527.06 

Phosphate rockJ fos. col. no. 47-HW-3 FCA- 73-47 1. 6 27.7 2. 4 1. 2 • 25 12. 6 14.2 180.20 1, 571.38 

Limestone, phosphatic FCA- 72-47 2.3 9. 3 3.2 1. 4 . 1 27.2 20.6 182.50 1, 592. 77 

Phosphate rock, calcareous FCA- 71-47 2.65 18.5 2. 2 1. 4 .04 17.4 19.2 185.15 1#641.80 

Dolomite, phosphatic FCA- 70-47 1.6 8. 7 1. 2 0.7 .03 33.3 8.0 186.75 1, 655. 71. 
I 

. p - 15 Phosphate rock LES -205-47 1.35 31.6 1. 1 0.9 .u 10.5 4.6 1811.10 1,698.38 

p - 1' Phoaphate rock LES -204-47 0.9 30.4 0.9 o. 6 • 18 10.6 4.6 . 189.00 1, 725.74 

P•l3 Pho!pkate rock. LBS-203-47 0.65 30.9 0.9 o. 5 • 28 10.2 4.3 189.65 1, T-&5. aa 

P • lZ Phosphate rock, ar,Ulaceous LES -202~• 1 l." 16.0 0.9 0.6 • 51 9.3 . 32.0 191.05 1, 76.8. 22 

P-11 Phupbate rock, aralllaceous LES ·201--&7 0.55 14.-l 0.9 o. 6 • 54 10. z 36.8 191.60 1, 776.14 

p .. 10 Phosphate rock LES-200-47 o. 5 31.6 o.8 o. 5 • 54 9.8 2. 7 192.10 1, 791.94 

p - .,. Phosphate rock :· I LES-199-47 1. 2.5 ·31. 2 1. z 0.6 • Z6 8.7 5.3 193.35 1, 830.94 

p .. -. Limestone - LES -198--&7 . o. 5 0.1 1. 5 o. 7 • 16 26.3 7. 7 193.15 1, .830. 99 

p .. 7 Phosphate rock LES -197--&7 0.55 Z7. 5 z.1 1. 1 • Z1 9.3 u .• 19-&.40 1, 846. lZ 

-p .. 6 Mudstone, calcareous LES -196--47 1. 0 5. 7 8.2 2.9 .45 13.9 57.3 195.40 1, 851.82 -· 

p - 5 Limestone, arpllaceous LES-195-47 1. 65 0.6 5.3 z. 1 .07 25.0 44.6 197.05 1, 85Z. 81 

p - ·" Mudstone, calcareOlls LES -194 --l 1 0.65 1. 0 10.5 3.6 • zz 9.5 77.5 197.70 1, 853.46 

p - ,., Mudstone, calcareous LBS-193-47 0.85 o. 3 7.0- Z.l .08 16.4 61.5 198.55 1, 853.71 

p - 2 Mudstone, calcareous LES -192-47 0.35 7. 5 10. 1 3. 3 .25 ,.~ 0 55.6 198.90 1, 856.34 

p - 1 ~hosphate roclq tos. col. no. ·7-HW•2 LES -191-47 O.Z5 34.0 0.9 0.6 .OZ5 4.8 4.5 199.15 1, 864.84 

Wells formation 

Cw- 11 Limestone: fos.; col. no. 47-HW-1 LES -190·47 1. z 

~ 

. , -.>t , .. ,. .. 

,, . ,-· 

/ 
W· 

0 

8PBCTRoCJilAPHIC AMALYSES-CONDA~. IDAHO~ LOT NO. !ZOO. 

Se:m.i-quantitative Ualfaes ot samples ot the Phosphoria formation. Conda, .Idaho (see immediately preceecUna paps for location 

of .. ction. thtcJmeaa and description of strata, and chemical analyses of samples), made by U. S. Bureau of llinea Laboratory, Albany, 

Oreaon. Ill addition to the elements listed in the table below, 8b, As, Be, Bi~ Cd, Co, aa, Au, Li. Pl, Ta, Sn, and W were looked 

for in all samples but were not detected. · 

Ezplanationofa~~ 

Bed 

DO. 

R .. 1 

p -142 

p -141 

p -140 

~ -139 

p -135 

p -134 

p -133 

P -13z 

p -131 

p -130 

p -129 

p -128 

p -127 

p -126 

P -us 

p -124 

p -123 

p -122 

P ·12l 

p -120 

p -119 

p -118-

p ··117" 

Sample no. Al Ba -B 

PCA-141·47 c ND 1: 

FCA-140-47 c ND F 

FCA-139-47 c ND E 

PCA-139-47 c ND E 

FCA-137-47 c ND E 

A • more than 10 percent 

B • 5-10 percent 

C • 1-5 percent 

D • 0. 1-1 percent 

Ca Cr Cb Cu Fe 

c E ND a c 

A E ND G D 

c E ND G c 

c E ND G c 

c E ND G c 

Beds P-138 throuah P-136 not analJZed. 

FCA-136-47 c ND F A E ND G D 

FCA-135-47 c ND E c E ND G c 

J'CA-134-47 D ND I' A E ND G D 

FCA-133-47 D ND I' A E ND G D 

PCA-132-47 c E F A D ND G c 

FCA-131-47 D E F A E ND G c 

PCA-130-47 c E F A E ND G c 

PCA-129-47 c E- F A E ND -G c 

FCA-128-47 c E F A I· E . ND ·G c 

FCA-127-47 c E F A ·B ND Q c 

I'CA-126-47 c E F A E ND .Q c •. 

FCA-125-47 c E .. ., A B ND G D 

FCA-124·47- c E F A E ND a D 

FCA-123-47 . c B ·~: A E B ·a c 

FCA-122•47 c E F A E B G D - JI'CA-121•47 D E F A E ·ND G D 

FCA-120-47 c B F A 'E E G c · FCA-119-47 c E B B E E G c · J'CA--118-4 7 c E •• c E E G c 

E • 0.01-0.1 percent 

F • 0.001-0.01-percent a • leas than 0. 001 percent 

ND • not detected 

Pb _1(1 Mn Mo Ni 

ND D E F E 

ND D E F E 

ND D E F E 

ND D E F E 

ND D E F E 

ND D E F E 

ND D E. E E 

ND D F F F 

ND D F F F 

ND D F E E 

ND D F F F 

ND D F F E 

ND D F F F 

rm D F F E 

ND D F F E 

ND D F F E 

ND c F F F 

ND D F F E 

ND D F E E 

ND D F· E E 

ND c F F F 

ND c E E E 

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

81 Aa -Na Sr Ti 

A ND E ND E 

c ND E E E 

A G D E E 

A ND D ND E 

A ND E ND E 

c G D E E 

A G D E D 

D G E E F 

D G E E F 

B G E E E 

c G E E E 

B G E E E 

c G E F E 

c G E E E 

c G E E E 

c G E E E 

c G E F E 

c G E E E 

A G E E E 

B G E E E 

c G E E E 

A G D E E 

A G D F E 

A G D F E 

v 

B 

D 

E 

D 

B 

D 

D 

E 

E 

D 

E 

E 

B: 

D 

D 

D 

E 

E 

D 

D 

E 

D 

D 

D 

p -116 . PCA-117-47 c E E --C E E .Q c ND ·n F E E A G D P' E .D 

p -11:5 PCA-116-47 c E E -C E- ~:· Q -c ND ·D E E E A G D F E n-

''- . 

- ' ';. .. !- ·.,., ,· 

•. ~- ~ ~:- A.' '.. ' • ;'1 ;·;-. 

..J.... ~~ :.._ '~ ' .;:·~' ~ ·" ', 

/ 

Zn Zr 

ND F 

J: F 

D E· 

ND F 

B F 

E F 

D J' 

E F 

E .,. D F 

E F 

E F 

ND F 

E F 

E F 

E F . 

ND F 

E F 

D E 

E F 

ND F 

E F 

E F 

D F· 

B F 

E E 

\ -· I 

;·,' 
p -114 FCA-115-47 c E E c E E G c ND c E E E A G D F E D E E 

p -113 FCA-114-47 c E E c E E G c ND c E E E A G D F E D E E 

p -112 PCA-111-47 c E F A E E G c E c E E E B G D E E D E F 

p -111 FCA-110-47 c E F B E E G c ND D E E E A G D E E D E F 

p -110 RA.H-146-47 c ND F A E ND G D ND D E F F c ND E E F D ND F 

p -109 RAH-145-47 c ND F A E ND G D ND D E E E B ND E E E D E F 

p -108 RAH-144 ... 47 c ND F A E ND G D ND D E E E B G E E E D E F 

p -107 RAH-143-47 c ND F· A E ND G D ND D E F E B G E E E D E F 

p -106 RAH-142-47 c ND E B E ND G c ND D E F E A G D E E E E F 

p -105 RAH-141-47 c ND F A E ND G c ND c E F E A G D E E E ND F 

p -104 RAH-140·47 c ND E A 1!: ND G c ND D E F E A G D E E E E F 

Beds P-103 throuah P-99 not analyzed. 

p - 98 FCA-109-47 c E F c E ND G c E D E F E A G D F E E ND E 

p ... 97 FCA-108-47 c E F c E ND G D ND D F F E B G D E E E E F 

p - 96 FCA-107·47 c E F B E ND G c ND D E F E A G D E E E E F 

p - 95 FCA-106-47 c E F c E ND G c ND D E F E A G D E E E E F 

p - 94 JI'CA-105-47 c E F B E ND G D ND c F F E c G D F E E NO F 

p - 93 FCA-104-47 c E F c E ND G c ND D E F E A G D E E E ND F 

p - 92 FCA-103-47 c E F c E ND G c ND D E F E A G D E E E E F 

p - 91 FCA-102-47 c E F B E ND G c ND D E F E A G D E E E E F 

p - 90 FCA-101-47 c E F c 1: ND G c ND D E F E A G D E E B ND F 

p - 89 FCA-100-47 c E F B E ND G c ND D E F E A G D E E E E F w 

... p - 88 FCA- 99-47 c E F B E ND G c ND D E F E A G D E E B E F 

p - 87 FCA· 98-47 c E F c E ND G c ND D E F E A G E E E E E F 

p - 86 FCA- 97•47 c E F c E ND G D ND D E F E B G E E E D E F 

p - 85 FCA• 96-47 c E F c E ND G c ND D E F E A G D E E E E F 

p - 8. LES -238-47 c E F B E ND G c ND D E F E B G E E E E E F 

p .. 83 LES -237-47 c E F c ·E ND G c ND D E F E A G D F E E ND F 

P - 8Z LES-236-47 c E F c E ND G c ND c E F E A G D F E E ND E 

p - 81 LE8•235-·7 c E ., c E ND G c ND c E F B B G E F E E ND F 

p - 80 LBS -234·47 c E F B E ND 0 c ND D E F E B G E E J!: E ND F 

p - 79 LBS-233-·7 c E .,. c E ND G c ND D E F E A 0 D F E E ND E 

p - 78 LB8-Z3Z·47 c E p D ND ND a c ND D E F E A 0 0 F E E NO F 

p - 77 LES -231 ... 47 c E p B E ND G ·c ND 0 E ,. B B G E :a: E D ND F 

p .. 76 LBS-230-·7 c E F c E ND G c ND D E F E A Q E F E E ND E 

p .. 71 LJ:S -229-47 c E F c E ND G c ND D E F E A G D F D E ND E 

p - 74 LBS-228-47 c E I' c E ND G c ND D E F E A Q D ,. D E ND E 

P•?J LBS -227-47 c E F B E ND G c ND c E F E A Q D F E E ND E 

p - 72 LBS-226-47 c E F B E ND G c NO D F. F E B G D F E B ND F 

p ... 71 LEs-z;u-•7 c B F B· E ND G c NO D F ,. E B G E F E B ND F 

p ... 70 LBS-224··7 c B I' c F ND G c ND D E F E B G D F E E ND E 

p - 69 1&8-223-47 c E ., B E ND 0 c ND D E F E B Q D E E D ND E 
Wol 

N 

Bed 

no. 

p - 68 

p - 67 

p .. 66 

p - 65 

p - 64 

p - 63 

P - 6Z 

p - 61 

p - 60 

p - 59 

p - 58 

p .. 57 

p - 56 

p - 55 

p - 54 

p - 53 

p - 5Z 

p - 51 

p - 50 

p - 49 

p - 48 

p - 47 

p - 46 

p - 45 

p - 44 

p ... 43 

P • 4Z 

p - 41 

p - 40 

p - 39 

p - 38 

p - 37 

p - 36 

p - 35 

p - 34 

p - 33 

P - 3Z 

p - 31 

p - 30 

P 

- Z9 

P - Z8 

Sample no. 

LES-:UZ-47 

LES-ZZ1-47 

LES-ZZ0-47 

LES-Z19-47 

LES -Z18-47 

LES -Z17-47 

LES-Z16-47 

FCA- 95-47 

FCA- 94-47 

FCA- 93-47 

FCA- 9Z-47 

P'CA- 91-47 

FCA- 90·47 

FCA- 89-47 

FCA- 88-47 

FCA- 87-47 

FCA- 86-47 

FCA- 85-47 

FCA- 84-47 

LES-ZlS-47 

LES-Zl4-47 

LES -Z13-47 

LES-Z1Z-47 

LES-Zll-47 

LES-Zl0-47 

LES-Z09-47 

LES -Z08-47 

LES -Z07-47 

LES-Z06-47 

LES -189-47 

LES -188-47 

LES ... 187-47 

LES-186-47 

LES-185-47 

LES-184-47 

LES-183-47 

LES -18Z-47 

LES-181-47 

LES-180-47 

FCA- 83-47 

FCA- 8Z-47 

Al Ba B 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c E F 

c ND F 

c ND F 

c E F 

c E F 

c E F 

c E F 

c ND F 

c ND F 

c ND F 

c ND F 

c ND F 

c ND F 

c ND F 

c ND E 

c ND F 

c E F 

c E F 

D E F 

Ca Cr Cb Cu Fe Pb 

c E ND G c ND 

c E ND G D ND 

D F ND G c ND 

D F ND G c ND 

c E ND G D ND 

c E ND G c ND 

B E ND G D ND 

c E ND G c ND 

B E ND G c ND 

·B E ND G D ND 

c D ND G c ND 

c D ND G c ND 

c E ND G c ND 

c E ND G c ND 

c E ND G c ND 

B E ND G D ND 

c E ND G c ND 

c E ND G c ND 

c E ND G D ND 

c E ND G c ND 

c E ND G D ND 

c E ND G c ND 

c E ND G c ND 

B F ND G D ND 

c F ND G D ND 

c E ND G c ND 

B E ND G c ND 

A E ND G c ND 

c E ND G c ND 

A E ND G D ND 

c D ND G D ND 

B E ND G D ND 

c E ND G D ND 

c E ND G D ND 

B E ND G D ND 

B E ND G D ND 

A E ND G c ND 

A E ND G D ND 

A D ND G c ND 

B E ND G c ND 

A E ND G c ND 

Mg Mn Mo Ni Si Ag Na Sr Ti v Zn Zr 

D E F E A G D F D E ND E 

D E F E c ND D F E E ND F 

D E F E A ND D ND E E ND E 

D E F E A ND D ND E E ND E 

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

D E F E A G D F E E E E 

D E F E c G D F E E E F 

D E F E A G D E E E E F 

D E F E A G D E E E E F 

D E F E B G D E E E ND F 

D E F E A G E E E E E F 

D E E E A G E E E D E F 

D E F E B G D E E E ND F 

D E F E c G E E E E E F 

D E F E A G D E E E ND F 

c E F E c G E F E E ND F 

D E F E A G D F E E ND F 

D E F E A G D F E E ND F 

D E F E A G E F E E ND E 

D E F E A G D F E E E F 

c E F E B ND E ND E E ND F 

D F F E A G E F E E E F 

D F F E A G D F E E E F 

c E F F c ND D F E E ND F 

c F F F c ND D ND E E ND F 

D F F E A G E F E E E F 

D F F E c G E F E E E F 

D F F E B G E E E D E F 

D F F E B G E F E E ND F 

D F F E c G D E E F E F 

D F F E A G D ND E F F F 

c E F E c G E ND E F E F 

c F F E B G E ND E F E F 

D F F E c G E ND E F F F 

D F F E B G D ND E F E F 

D F F E B G E ND E F E F 

D E F E A G D ND D F E F 

D F F E c G E ND E F E F 

D F F E B G D E D E E F 

D F F E B G E E E D E F 

D E F E c G E E E D E F 
~ 

~ 

p - 27 

p - 26 

p - 25 

P 

- Z4 

P - Z3 

p .. 22 

p - Z1 

p - zo 

p - 19 

p - 18 

p - 17 

p - 16 

P-15 

p - 14 

p - 13 

P - 1Z 

p - 11 

p - 10 

p - 9 

p - 8 

p - 1 

p - 6 

p - 5 

p - •· p - 3 

p - 2 

p - 1 

FCA- 81-47 

FCA· 80-47 

FCA- 79-47 

FCA- 78-47 

JPCA- 77-47 

FCA- 76-47 

FCA- 75--'7 

FC.A.- 74-47 

FCA- 73-47 

FCA- 72-47 

PCA- 71-47 

FCA- 70-47 

LES -205-41 

LES -204-47 

LES-203-47 

LES-ZOZ-47 

LES -201-47 

LES -200-47 

LES-199-47 

LBS-198-47 

LBS-197-47 

LES-196-47 

LES-195-41 

LBS -194-47 

LES-193-47 

LBS-192-47 

LIIS -191-47 

D E 

c E 

c E 

D E 

D E 

c E 

E E 

D E 

D E 

c E 

c E 

D E 

D ND 

D ND 

D ND 

D ND 

D ND 

D ND 

D ND 

D ND 

c ND 

c ND 

c ND 

c ND 

c ND 

c ND 

c ND 

.,. B E ND G D 

., B E ND G c 

p B E ND G c 

I' B E ND G c 

F B E ND G c 

JP B E ND G c 

F c E ND G D 

F A E ND G c 

F B E ND G D 

F B E ND G D 

F B E ND G D 

F B E ND G D 

F A E ND G D 

F A E ND G D 

F B E ND G D 

F A E ND G D 

F B E ND G D 

F B E ND G E 

F A E ND G D 

F B E ND G D 

F A E ND G D 

E c E ND G c 

E c F ND G c 

B D E ND G c 

E c F ND G D 

E c E ND G c 

F A F ND G D 

ND c F F E c G E F E E ND F 

ND D E F E A G E E E E E E 

ND c E F E B G E F E E E F 

ND D F F E B G E E E D E F 

ND D F F E B G E E E D E F 

ND c E F E B G D F E D E F 

ND D F F E D G D E E B E F 

ND D E F E B G D E E D E F 

ND D F F E c G E F E D E F 

ND c E F E B G E F E D E F 

ND D F F E c G E F E D E F 

ND c F F E c G E F E E ND F 

ND D F F E c G D E E E F E 

ND D ND F E c G D E E D F F 

ND D ND F E c G D E E D p F 

ND D ND F E c G D E E D E F 

ND D ND F E c G D E E D E F 

ND D ND F E c G D E E D E F 

ND D ND F E c G D 1: E D E F 

ND c F F E c G E ND E E ., F 

ND D F F E c G D E E D E F 

ND D F E E A G D ND D D D E 

ND c F F E A G E ND E E F E 

ND D F F E A G E ND D D E E 

ND c F F E A G E ND D E .,. E 

ND D E F E A G D ND D E E E 

ND D F F E c G D E F F JP I' --------- -----
:.: 

DIAMOND DRILL HOLE 6, SLUG CREEK VALLEY, IDAHO. LOT NO. 1277. 

Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole 6 on west slope of hill 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 a• E. Hole 

drilled in September 1948 by U. S. Bureau of Mines, A. E. Long in charge, and core measured and sampled by D. F. Davidson. Samples 

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

Bed Rock description Sample 

Chemical analyses Cumulative 

no. Thickness (percent) Thickness x 

no. (feet) I AC1C1 

thickness percent P 0 

P205 insoluble (feet) ( cumulat~e r ---- - ......... 

Phosphatic shale member of Phosphoria formation-lower beds only 

P-32 Phosphate rock, argillaceou~ DFD-1111 2.5 16.8 41.9 2. 5 42.00 

P-31 Phosphate rock, argillaceous DFD-1112 2.0 16. 3 39.0 4.5 74.60 

P-30 Phosphate rock, argillaceous DFD-1113 0.5 21.2 25.4 5. 0 85.20 

P-29 Phosphate rock DFD-1114 2.2 28.0 14.5 7.2 146.80 

P-28 Mudstone, phosphatic, calcareous DFD-1115 0.7 13.0 29.8 7. 9 155.90 

P-Z7 Limestone DFD-1116 2. 1 2.4 9.9 10.0 160.94 

P-26 Limestone DFD-1117 1. 4 7.6 17.9 11.4 171.58 

P-25 Phosphate rock, argillaceous DFD-1118 0.5 22.3 Z6.0 11.9 18Z.73 

P·Z4 Limestone DFD-1119 0.8 3.7 15.8 1Z. 7 185.69 

P-Z3 Limestone, argillaceous, phosphatic DFD-11ZO 1.3 9.1 Z7. 5 14.0 197.5Z 

P-zz Mudstone, phosphatic DFD-11Z1 1.5 11.3 53.9 15.5 214.47 

P·Z1 Limestone, argillaceous DFD-11ZZ 1.6 4. 1 Z8.4 17. 1 ZZl. 03 

P-zo Limestone, argillaceous DFD-11Z3 0.7 0.4 30.8 17.8 ZZ1.31 

P-19 Limestone DFD-1124 o. 7 6.7 16. z 18.5 ZZ6.00 

P•l8 Phosphate rock DFD-11Z5 1. 3 Z8.9 14.7 19.8 Z63.57 

P•l7 Phosphate rock DFD•11Z6 1. 1 30.9 10.9 Z0.9 Z97.56 

P-16 Phosphate rock DFD-11Z7 o.8 z8.8 14.5 Z1. 7 3Z0.60 

P-15 Phosphate rock. argillaceous DFD·11Z8 1.5 zz.4 30.Z Z3.2 354.ZO 

P-14 Limestone, arpllaceous DFD-1129 1. 4 3.6 Z7.7 Z4.6 359.Z4 

P-13 Phosphate rock, calcareous DFD-1130 4.Z Z4.Z 11.0 Z8.8 460.88 

P-lZ Phosphate rook DFD-1131 1. 5 zz.s 16.5 30.3 495.08 

P•ll Phosphate rock, argillaceous DFD-113Z 1.1 ZZ.7 Z3.7 31.4 5Z0.05 

P-10 Limestone, phosphatic DFD-1133 1. 1 13.9 13.4 3Z.5 535.34 

P• 9 Limestone, phosphatic DFD-1134 0.9 9.8 8. 6 33.4 544.16 

P· 8 Phosphate rock DFD-1135 1. 0 31.4 7. 3 34.4 575.56 

P- 7 Phosphate rock DFD-1136 1. 3 33.7 z.s 35.7 619.37 

P- 6 Phosphate rock DFD-1137 z. 5 33.6 Z.3 38.Z 703.37 

P- 5 Phosphate rock DFD-1138 Z.3 31.8 6. 1 40.5 776.51 

P- 4 Mudstone DFD-1139 1. 0 6.1 64.6 41.5 78Z.61 

P- 3 Limestone, araillaceous DFD-1140 1.1 2.0 4Z.6 4Z.6 784.81 

P• Z Mudstone, calcareous DFD-1141 z.1 1. 1 56.2 44.7 787.12 

P- 1 Phosphate rock DFD•ll4Z 0.4 30.7 7.4 45.1 799.40 \ 
35 
w 

0" 

DIAMOND DRILL HOLE 3, MIDDLE SULPHUR CANYON, IDAHO. LOT NO. 1274. 

Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole 3 on south slope of Middle Sulphur Canyon, sec. 8. T. 9 s .• R. 43 E •• Caribou County, Idaho, on west limb of Trail Creek syncline. Beds strike north-northwest and dip 15° E. 

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

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

Bed 

DO. 

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-lZ 

P-11 

P-10 

P- 9 

P- 8 

P- 7 

--

p... 6 

P- 5 

P- 4 

P- 3 

P- 2 

--

P- 1 

Chemical analyses Cumulative Sample Thickness (percent) Rock description thickness no. (feet) P205 I Acid (feet) insoluble 

Phosphatic shale member of Phosphoria formation-partial section 

Mudstone DFD-961 1.2 4.4 73.4 1. 2 

Mudstone DFD-962 0.8 2. 2 84.9 2. 0 

Mudstone DFD-963 3.8 3.4 78.9 5. 8 

Mudstone DFD-964 2. 0 6.4 66.6 7. 8 

Mudstone DFD-965 2.3 7.8 65.9 10. 1 

Mudstone, phosphatic DFD-966 4.7 12.8 50.6 14.8 

Mudstone, phosphatic DFD-967 2.2 13.5 50.3 17.0 

Phosphate rock, argillaceous DFD-968 3.5 19. 1 37.7 20.5 

Phosphate rock, argillaceous DFD-969 1.1 24.4 20.6 21.6 

Phosphate rock, calcareous DFD-970 2. 1 25.0 13. 1 23.7 

Phosphate rock DFD-971 o. 7 25.3 17.3 24.4 

Phosphate rock and mudstone DFD-972 0.4 21.4 28.0 24.8 

Phosphate rock and mudstone DFD-973 3.0 24.5 16.6 27.8 

Phosphate rock, argillaceous DFD-974 0.7 18.8 35. 1 28.5 

Mudstone, phosphatic DFD-975 1. 9 12.8 52.4 30.4 

Phosphate rock, argillaceous DFD-976 2.6 19.8 39.3 33.0 

Phosphate rock DFD-977 1.3 27.9 17. 2 34.3 

Phosphate rock, argillaceous DFD-978 1. 9 20.8 36.0 36.2 

Mudstone, phosphatic "DFD-979 0.9 14.5 51.0 37. 1 

Core missing ·- 0.3 -- -- 37.4 

Phosphate rock, argillaceou'S DFD-980 2.4 27.5 21.2 39.8 

Phosphate rock DFD-981 2.7 28.8 19.7 42.5 

Phosphate rock, argillaceous DFD-982 1.3 19.9 36.7 43.8 

Phosphate rock, argillaceous DFD-983 1.3 23.8 27.5 45.1 

Phosphate rock, argillaceous DFD-984 0.7 28.8 24.1 45.8 

Core missing -- 22.4 -- -- 68.2 

Phosphate rock DFD-985 1. 2 32.4 9. 1 69.4 

* Cumulative data incomplete due to missing information. Computations start from zero after interruption. 

** Note incompleteness of cumulative data. 

Thickness x 

percent P lvo5 (cumulat e, 

5.28 

7.04 

19.96 

32.76 

50.70 

110.86 

140.56 

207.41 

234.25 

286.75 

304.46 

313.02 

386.52 

399.67 

424.00 

475.48 

511. 75 

551.27 

564.32 

66.00* 

143.76 

169.63 

200.57 

220.73** 

--

38.88* 
""' ..., 

DIAMOND DRILL HOLE 4, MIDDLE SULPHUR CANYON, IDAHO. LOT NO. 1Z75. 

Phosphatic shale member of Phosphoria formation cored in diamond drill hole 4 on north slope of Middle Sulphur Canyon, sec. 8, 

T. 9 S., R. 43 E., Caribou County, Idaho, on west limb of Trail Creek syncline. Beds strike north-northwest and dip zzo E. Hole 

drilled in September 1948 by U.S. Bureau of Mines, A. E. Long in charge. Partial section measured and sampled by D. F. Davidson. 

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

Bed Rock description Sample 

Chemical analyses Cumulative 

no. 

Thickness (percent) Thickness x 

no. (feet) f Acid 

thickness percent P if, OS 

Pz05 insoluble (feet) (cumulat eJ 

-----

Phosphatic shale member of Phosphoria formation-basal beds only 

P- 8 Phosphate rock DFD-986 1. z Z9. 1 15.6 1. z 34.9Z 

P- 7 Phosphate rock DFD-987 0.9 Z7.6 19.4 z. 1 S'J. 76 

P- 6 Phosphate rock, arJlllaceous DFD-988 Z.5 Z7.Z Zl. 8 4.6 1Z7.76 

P- 5 Phosphate rock. argillaceous DFD-989 4.4 Z6.6 Z1. 5 9.0 Z44.80 

P- 4 Phosphate rock DFD-990 4.1 3Z.8 5.9 13. 1 379. Z8 

P- 3 Mudstone DFD-991 3.0 Z.4 78.5 16. 1 386.48 

P- Z Mudstone DFD-99Z 0.4 1. z 80.9 16.5 386.96 

P- 1 Mudstone, phosphatic DFD-993 0.6 9.9 59.7 17. 1 39Z.90 

Wells formation 

Cw-1 I Limestone ~---~-- -~~~ DFD-994 I 1. 0 I 0. Z I Z. 8 I 1. 0 J o.zo 
""' OCI 

DIAMOND DRILL HOLE 5, SOUTH FORK OF JOHNSON CREEK, IDAHO. LOT NO. 1276. 

Part of phosphatic shale member of Phosphoria formation cored in diamond drill hole 5 in valley bottom of south fork ot Johnson 

Creek, sec. 9, T. 9 S., R. 43 E ... Caribou County, Idaho, on east limb of Trail Creek syncline. Beds strike northwest and dip 30° SW. 

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

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

Chemical analyses Cumulative Thickness z: Sample Thickness (percent) thickness percent P f,o5 

Bed Rock description no. (feet) P205 ~1d (feet) (cumulat e, no. luble - -

Phosphatic shale member of Phosphoria formation-partial section 

P-7 Mudstone DFD- 995 0.5 1. 8 83.0 o. 5 0.90 

P-6 Mudstone, phosphatic DFD- 996 1.0 1Z.8 51.4 1. 5 13. 70 

P-5 Mudstone DFD- 997 l.Z Z.7 76. 1 z. 7 16.94 

P-4 Mudstone DFD- 998 Z.3 6.6 64.0 5. 0 32. 12 

P-3 Mudstone DFD-1098 0.9 3.9 71.0 s. 9 35.63 

P-2 

-- Core 

Mudstone 

missing 

DFD-1099 

-- 2.8 

1. 1 

6.2 

-- 67.4 -- 9.8 

8. 7 ~ 

-- P-1 Mudstone and phosphatic mudstone DFD-1110 2. 1 11.5 44.6 11.9 24. 15•• 

•• Note incompleteness of cumulative data. 
IN 

..a 

NORTH DAIRY, IDAHO. LOT NO. 1Z1Z. 

Upper part of phosphatic shale member of Phosphoria formation sampled in bulldozer trench near north end of Dairy syncline, 

NE}NEi sec. ZO, T. 9 S., R. 44 E., Caribou County, Idaho. The stratigraphic sequence of the units is questionable for, because of a large number of faults, some beds may be omitted or repeated. No cumulative totals are given for this reason. Section measured by 

R. M. Campbell and L. E. Smith and sampled by R. S. Sears, R. P. Sheldon, and R. A. Smart in August and September 1947. Samples 

analyzed for P 2 0§ 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 Thickriess Rock description no. (feet) P2o5 no. 

Rex member of Phosphoria formation--basal bed only 

R- 1 I Chert I LES-400-47 r o. 8 --~ 6. z r------=- I -- I -- r 79.6 

Phosphatic shale member of Phosphoria formation--upper part only 

P-61 Phosphate rock LES-399-47 0.6 30.8 -- -- -- 12.9 

P-60 Mudstone LES-398-47 o.8 -- -- -- -- -- P-59 ·Mudstone LES-397-47 0.5 6.9 -- -- -- 60.1 

P-58 Mudstone LES-396-47 2.0 1.5 -- -- -- 79.3 

P-57 Mudstone LES-395-47 l.Z l.Z -- -- -- 78.6 

P-56 Mudstone LES-394-47 0.3 3.9 -- -- -- 67.7 

P-55 Mudstone LES-393-47 1. 1 4.7 -- -- -- 73.9 

P-54 Mudstone LES-392-47 1. 5 6.2 -- -- -- 67.3 

P-53 Mudstone LES-391-47 3.4 2.2 -- -- -- 78.0 

P-52 Phosphate rock, argillaceous LES-390-47 1.0 26.6 -- -- -- Z3.3 

P-51 Mudstone LES-389-47 1. 3 3.9 -- -- -- 69.0 

P-50 Mudaatone LES-388-47 1.8 1.0 -- -- -- 83.3 

Several beds may be missing in fault zone between LES-388-47 and RMC-50-47. 

P-49 Phosphate rock RMC- 50-47 1. 3 34.Z 1. 60 0.94 4.Z6 7.1 

P-48 Mudstone and phosphatic mudstone RMC- 49-47 1. 1 11. 7 7.60 3.0 5.10 59.2 

P-47 Phosphate rock and mudstone RMC- 48-47 0.9 Z7. 2 3.4 1. 61 5.98 2Z.8 

P-46 Mudstone RMC- 47-47 0.3 5.8 11.0 4.3 5.48 69.2 

P-45 Phos~:>hate rock RMC- 46-47 0.6 31.3 1. 6 0.89 4.24 1Z.8 

P-44 Phosphate rock. arpllaceous RMC- 45-47 1.4 18.8 5. 0 1.86 5.92 40.1 

P-43 Phosphate rock RMC- 44-47 1. 0 Z8.7 2. 1 0.92 6.40 16. 1 

P-42 Mudstone, phosphatic RMC- 43-47 1. 2 12.5 8.6 2.56 6.20 54;. 5 

P-41 Phosphate rock RMC- 42-47 1. 4 32.7 1. 1 1.45 6.36 7.3 

P-40 Phosphate rock, argillaceous RMC- 41-47 0.7 24.4 3.3 1.29 7.30 25.6 

P-39 Phosphate rock RMC- 40-47 0.7 26.2 2.0 1.32 9. 92· 18.2 
... 

0 

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-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 

Phosphate rock and phosphatic mudstone 

Mudstone 

Mudstone. phosphatic 

Phosphate rock, argillaceous 

Mudstone, phosphatic 

Mudstone, calcareous and phosphate rock 

Mudstone 

Mudstone, phosphatic, calcareous 

Phosphate rock and phosphatic mudstone 

Phosphate rock and phosphatic mudstone 

Phosphate rock 

Phosphate rock, contains chert lens 

Phosphate rock and argillaceous phosphate 

rock 

Phosphate rock and argillaceous phosphate 

rock 

Phosphate rock and argillaceous phosphate 

rock 

Phosphate rock 

Phosphate rock 

Fault zone, correlation not positive. 

Mudstone 

Phosphate rock and mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone, phosphatic 

Phosphate rock, argillaceous 

Mudstone,. phosphatic 

Mudstone and phosphate rock 

Mudstone, phosphatic 

Mudstone 

Mudstone, phosphatic 

Mudstone, phosphatic 

Mudstone 

Mudstone 

lludstoRe 

Mudstone 

Mudstone, phosphatic 

Sample Thickness 

no. (feet) P205 

RMC- 39-47 o. 7 20.8 

RMC- 38-47 0.6 5.6 

RMC- 37-47 0.5 13.4 

RMC- 36-47 0.9 21. 7 

RMC- 35-47 1. 0 10.4 

RMC- 34-47 0.3 17. 3 

RMC- 33-47 0.2 3.5 

RMC- 32-47 0.4 9.2 

RMC- 31-47 0.4 29.1 

RMC- 30-47 0.4 Zl. 5 

RMC- 29-47 0.4 32.3 

RMC- 28-47 0.37 30.1 

RMC- 27-47 0.43 31.3 

RMC- 26-47 0.5 29.6 

RMC- 25-47 o. 8 31.4 

RMC- 24-47 0.57 26.8 

RMC- 23-47 o. 5 27.6 

LES-387-47 0.85 1. 1 

Sample lost 0.35 -- LES-385-47 0.55 12.4 

LES-384-47 0.7 10.4 

LES-383-47 o. 5 13.4 

LES-382-47 0.55 15.8 

LES-381-47 0.45 20.1 

LES-380-47 0.3 8.8 

LES-379-47 0.55 6.9 

LES-378-47 0.5 8.1 

LES-377-47 0.6 5.9 

LES-376-47 o. 7 7.8 

LES-375-47 0.5 8.5 

LES-374-47 o. 5 6. 5 

LES-373-47 0.5 6. 1 

LES-372-47 0.6 1.9 

LES-371-47 0.4 6.9 

LES-370-47 0.6 11.3 

Chemical analyses (percent) 

Al2o3 Fe2o3 

Loss on Acid 

ignition insoluble 

4.1 1. 42 7.02 35.9 

9.20 3.10 5.84 73.2 

7.40 2.50 5.82 55.2 

4.90 1. 70 8.64 30.0 

8.40 2.90 9.72 55.3 

7. 10 2.4 9.60 38.8 

12.00 4.10 14.84 63.3 

8.90 2.10 1. 10 56.3 

1.9 0.77 8.62 13.4 

5.1 1.70 7.62 32.6 

0.93 0.46 6.02 10.3 

0.55 0.70 4.29 16.6 

1. 6 0.70 8.04 10.2 

1. 3 0.63 9.52 12. 1 

1. 4 0.68 9.34 13.6 

2.4 0.97 12.54 14.3 

2.3 0.86 11.78 8.0 

-- -- -- 83.9 

-- -- -- -- -- -- -- 45.2 

-- -- -- 53.1 

-- -- -- 46.6 

-- -- -- 40.9 

-- -- -- '35.3 

-- -- -- 58.0 

-- -- -- 60.2 

-- -- -- 62. 1 

-- -- -- 7l.2 

-- -- -- 63.9 

-- -- -- 63.4 

-- -- -- 70.7 

-- -- -- 69.6 

-- -- -- 76.2 

-- -- -- 67.1 

-- -- -- 55.8 
P- 3 Mudstone, chert, and phosphate rock Sample lost 0.3 -- -- -- LiJ -- P- 2 Mudstone. contains chert nodules LES-368-47 0.35 3. 0 -- -- 80.3 

P- 1 Mudstone, contains chert nodules LES-367-47 2.4 2.4 -- -- 85.1 

.... 

..... 
~ 

N 

SWAN LAKE GULCH, IDAHO. LOT NO. 1265. 

Phosphatic shale member and part of Rex member of Phosphoria formation sampled in bulldozer trench in Swan Lake gulch, NE-isW! sec. 29, 

T. 9 S., R. 43 E., Caribou County, Idaho, on west limb of faulted and contorted syncline. Beds of Rex member strike N. 46° W. and dip 54° E. Section 

measured by F. W. 0' Malley, R. P. Sheldon, and R. G. Waring and sampled by Waring and H. A. Larsen in September 1948. Samples analyzed for 

p 2o.§ and acid insoluble by U.S. Bureau of Mines Laboratory, Albany, Oregon, and for other constituents by Trace Elements Section Laboratory, U. S. 

Georogical Survey, Washington, D. C. 

Chemical analyses (percent) Cumulative Thickness x Sample Thickness I , 

1 

, I Loss on I Acid thickness percent p or Bed Rock description no. (feet) P 20 5 Al203 Fe203 ignition insoluble (feet) ( cumula tf'te no. 

----- - --------- ---

Rex member of Phosphoria formation--basal beds only 

R- 8 Chert WOM-3011 z. 7 o. 2 -- -- -- 79.4 2. 7 0.54 

R- 7 Limestone, argillaceous WOM-3020 3.5 o. 3 -- -- -- 35.4 6. 2 1. 59 

R- 6 Chert, calcareous WOM-3019 3.5 0.4 -- -- -- 77.4 9. 7 2.99 

R- 5 Chert, calcareous and limestone WOM-3018 2. 5 o. 6 -- -- -- 65.9 12.2 4.49 

R- 4 Limestone, argillaceous WOM-3017 1. 5 0.4 -- -- -- 24.6 13. 7 5.09 

Roo 3 Chert WOM•3016 0.9 o. 5 -- -- -- 77.8 14.6 5.54 

R- 2 Chert, calcareous WOM-3015 5.9 0.5 -- -- -- 70.3 20.5 8.49 

R- 1 Chert, calcareous WOM-3014 2.9 o. 7 -- -- -- 60.7 23.4 10.52 - ~----- ~-- -- -~~--- ~-------· ~-

Phosphatic shale member of Phosphoria formation 

P-97 Phosphate rock, argillaceous, calcareous; 

fos. col. no. 48-JES-2431 WOM-3013 0.9 19.5 -- -- -- 28.9 o. 9 17.55 

P-96 14udstone, calcareous . WOM-3012. 1. 2 1. 5 -- -- -- 74.8 2. 1 19.35 

P-95 Mudstone, calcareous RGW- 3010 1. 1 6.4 -- -- -- 54.5 3. 2 26.39 

P-94 Mudstone; fos. col. no. 48-JES-242 RGW•3009 2.0 1. 8 -- -- -- 76.4 5. 2 29.99 

P-93 Mudstone, calcareous; fos. col. no. 48-JES-241 ROW- 3008 3. 5 0.6 -- -- -- 68.4 a. 1 32.09 

P-92 Mudstone, calcareous; fos. col. no. 48-JES-240 RGW- 3007 1. 5 0.9 -- -- -- 73.9 10.2 33.44 

P-91 Limestone ROW-3006 0.6 o. 7 -- -- -- 19. 7 10. 8 33.86 

P-90 Mudstone, calcareous; fos. col. no. 48-JES-239 ROW- 3005 1. 0 3. 5 -- -- -- 59.3 11.8 37.36 

P-89 Mudstone, calcareous; fos. col. no. 48-JES-238 ROW- 3004 2.2 3.2 -- -- -- 66.1 14.0 44.40 

P-88 Mudstone ROW- 3003 1. 7 3.5 -- -- -- 72. 1 15.7 so. 35 

P-87 Mudstone, phosphatic RGW- 3002 0.3 12.3 -- -- -- 43.3 16.0 54.04 

P•86 Limestone, phosphatic RGW- 3001 0.5 15.8 -- -- -- 18.9 16.5 61.94 

P-85 Limestone, argillaceous RPS- 2850 1. 0 0.8 -- -- -- 47. 1 17.5 62.74 

P-84 Phosphate rock RPS- 2849 1.4 32.8 -- -- -- 6.9 18.9 108.66 

P-83 Phosphate rock, argillaceous, calcareous BPS- 2848 0.4 20.9 -- -- -- 23.0 19.3 117.02 

P-82 Mudstone, phosphatic; fos. col. no. 48-JES-237 WOM-3000 2. 7 15.8 -- -- -- 39.4 22.0 159.68 
P-81 Mudstone, calcareous, phosphatic; 

fos. col. no. 48-JES-Z36 WOM-Z999 Z.4 10.3 -- -- -- 38.9 24.4 184.40 

• P-80 Phosphate rock, calcareous WOM-2998 0.8 Z5.2 -- -- -- 13.2 25.2 204.56 

-- Limestone concretion WOM-2973 (o. 4) 0.9 -- -- -- 0.7 -- -- P-79 Phosphate rock, calcareous WOM-2997 4.0 18. z -- -- -- 19.2 29.2 Z77.36 

P-78 Limestone, phosphatic; fos. col. no. 48-JES-235 WOM-2996 1. 5 12.6 -- -- -- 18.6 30.7 296.26 

P-771 Limestone, pboapbat!c: fos. col. no, 

I I 

48-JES-234 WOM-2995 1. 7 15.2 -- -- -- 18.9 32.4 322.10 

P-76 Phosphate rock, calcareous, argillaceous; 

fos. col. no. 48-JES-233 RPS- 2847 4.2 15.8 -- -- -- 25.7 36.6 388.46 

Limestone concretion RPS• 2846 {0. 5) 1. 3 -- -- -- 1. 5 

P-75 Mudstone, phosphatic; fos. col. no. 

48-JES-232 RPS- 2845 2. 5 11. 1 -- -- -- 48.3 I 39. 1 I 416.21 

P-74 Mudstone RPS- 2844 0.9 0.9 -- -- -- 85.5 40.0 417.0Z 

P-73 Mudstone and argillaceous phosphate 

rock RPS- 2843 3.3 10.7 -- -- -- 52.2 43.3 452.33 

P-72 Mudstone; fos. col. no. 48-JES-231 RPS- 2842 3.4 s. 2 -- -- -- 71.6 46.7 470.01 

P-71 Mudstone, phosphatic RPS- 2841 0.5 14.4 -- -- -- 51.7 47. z 477.21 

P-70 Mudstone RPS- 2840 1. 3 z. 2 -- -- -- 85.2 48.5 480.07 

P-69 Phosphate rock, argillaceous RPS• 2839 1. 0 18.4 -- -- -- 45.2 49.5 498.47 

P-68 Mudstone RPS- 2838 1. 7 1. 4 -- -- -- 87.2 51. 2 500.85 

P-67 Mudstone, phosphatic WOM-2994 4.0 10.2 -- -- -- 61.7 55.2 541.65 

P-66 Mudstone WOM-2993 4.8 4.9 -- -- -- 75.9 60.0 565.17 

• P-65 Mudstone WOM-2992 2. 5 5. 5 -- .... -- 66.6 62.5 578.92 Uol P-64 Phosphate rock WOM-2991 0.3 28.3 -- .... -- 18. 1 62.8 587.41 

P-63 Mudstone; fos. col. no. 48-JES-230 WOM-2990 0.8 5.2 -- -- -- 71. 7 63.6 591. 57 

P-62 Phosphate rock, argillaceous WOM-2989 0.4 17.4 -- -- -- 40.9 64.0 598.53 

P-61 Mudstone WOM-2988 1. 0 6. 2 -- -- -- 62.6 65.0 604.73 

P-60 Phosphate rock, argillaceous and 

mudstone WOM-2987 1. 4 15.6 -- -- -- 39.4 66.4 626.57 

P-59 Mudstone WOM-2986 1.4 5.9 -- -- -- 63.2 67.8 634.83 

P-58 Mudstone, phosphatic WOM-2985 1. 1 13.6 -- -- -- 47.2 68.9 649.79 

P-57 Mudstone WOM-2984 1. 8 1. 6 -- -- -- 85.7 70.7 652.67 

P-56 Mudstone, phosphatic WOM-2983 0.8 14.3 -- -- -- 48.4 71.5 664. 11 

P-55 Mudstone WOM-2982 2.5 1.1 -- .... .... 85.6 74.0 666.86 

P-54 Mudstone; fos. col. no. 48-JES-229 WOM-2981 4.0 1.3 -- -- -- 85.3 78.0 672.06 

P-53 Phosphate rock, argillaceous WOM-2980 0.6 21.6 -- -- -- 33.0 78.6 685.02 

P-52 Mudstone WOM-2979 0.6 5. 5 -- -- -- 71. 7. 79.2 688.32 

P-51 Mudstone WOM-2978 1.4 3. 7 -- -- -- 80.8 80.6 693.50 

P-50 Mudstone WOM-2977 0.8 o. 3 -- -- -- 88.3 81.4 693.74 

P-49 Mudstone; fos. col. no. 48-JES-228 WOM-2976 1. 6 1. 4 -- -- -- 83. 1 83.0 695.98 

P-48 I Mudstone WOM-2975 1. 0 0.4 -- -- -- 84.6 84.0 696.38 

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

Bed 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

p 

no. 

-·7 

-f6 

-45 

-44 

-43 

-•z 

-41 

-40 

-39 

-38 

-37 

-36 

-35 

-34 

-33 

-3Z 

-31 

-30 

·Z9 

-Z8 

·Z7 

-Z6 

-z5 

•Z4 

•Z3 

-zz 

-Z1 

-zo 

-19 

-18 

-17 

-16 

·15 

-14 

-13 

-u 

-11 

-10 

- 9 

- 8 

Rock description 

Mudstone 

Phosphate rock, argillaceous 

Mudstone; fos. col. no. 48-JES-ZZ7 

Mudstone.., phosphatic 

Mudstone; fos. col. no. 48•JES-2Z6 

Phosphate rock. arlfilaceous 

Phosphate rock 

Mudstone 

Mudstone 

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

Mudstone 

Phosphate rock. argillaceous 

Mudstone 

Phosphate rock. argillaceous 

Mudstone; fos. col. no. 48·JES-ZZ4 

Phosphate rock and mudstone 

Mudstone; fos. col. no. 48-JES-ZZ3 

Mudstone, phosphatic. calcareous 

Mudstone 

Mudstone 

Mudstone 

Mudstone 

Phosphate rock. argillaceous, calcareous 

Mudstone, calcareous 

Mudstoae. phosphatic. calcareous 

Phosphate rock, calcareous, arpllaceous 

Mudstone, phosphatic 

Phosphate rock 

Phosphate roct. arpllaceous 

Limestone 

Mudstone, phosphatic, calcareous 

Limestone, argillaceous 

Limestone, phosphatic, areillaceous 

Phosphate rock, arpllaceous 

Phosphate rock, arlfllaceous 

Phosphate rock, argillaceous 

Phosphate rock 

Phosphate rock, areillaceous 

Mudstone; fos. col. no. 48•JES-22Z 

Phosphate rock, argillaceous; fos. col. no. •a-n:s-zz 1 

Sample Thickness no. (feet) Pz05 

WOM-297-i 1. 4 0.4 

WOM·Z97Z 1. 7 Z0.3 

WOM•Z971 5.0 l.f 

WOM .. Z970 1.1 8. 1 

WOM-Z969 z.o 3. 0 

WOM-Z968 0.7 18.8 

WOM-Z967 0.9 Z7.7 

WOM·Z966 3.5 1. z WOM•Z965 1. 3 1. 0 

WOM-Z964 3.0 •.z 

WOM-2963 4 •• z.1 

WOM-296Z o. 5 Z2. 1 

YIOM•Z961 4.7 4. z WOM-Z960 0.5 Z5.3 

WOM•Z959 1.7 1. z 

WOM·Z958 0.7 Zl. 3 

WOM-Z957 o.8 z.6 

WOM-295#1 2.4 14.5 

WOM-Z955 1. 8 3.2 

WOM-Z954 0.7 3. 3 

WOM-Z953 0.8 1. 5 

WOM-Z95Z 1. 0 4.9 

WOM-Z951 0.4 16.4 

WOM-Z950 1.1 6. 7 

WOM·Z949 3.0 13.4 

WOM-2948 2. 5 Z1.4 

WOM-Z947 o.6 13.3 

WOM•29f6 z.6 Z6.7 

WOM•29-i5 1. 0 17.4 

WOM ... Z94-i 2.0 2. a 

WOM·Z943 Z.3 u.o WOM-29-iZ 2.1 1. 5 

WOM•Z941 o.• 11.7 

WOM-2940 z..CJ Z5. 6 

WOM-Z939 1. 0 19.0 

WOM-Z938 0.7 21.35 

WOM-2937 1. 3 Z7.6 

WOM-Z936 1.0 Z5.6 

WOM-Z935 0.3 3.0 

WOM-Z93-i 1. 3 2Z. 3 

Cheudcal~yses(percent) Cumulative Thickness x 

Loss on Acid thickness percent P ft. OS Alz03 Fezo3 iiJlition insoluble (feet) (cumulat e, 

-- .... -- 85.7 85.4 696.94 

-- -- -- 34.9 87.1 731.45 

-- -- -- 85.5 9Z.l 738.45 .... -- -- 71.0 93.Z 747.36 

-- -- -- 76.Z 95. z 753.36 

-- -- -- 37.3 95.9 766.SZ .... -- -- 19.1 96.8 791. 45 

-- -- -- 88.1 100.3 795. 65 

-- -- -- 87.1 101.6 796.95 

-- -- -- 77.0 104.6 809.55 

-- -- -- 87.8 109.0 818.79 

-- -- -- 37.8 109.5 8Z9.84 

-- -- -- 74.1 114. z 849.58 

-- -- -- Z4.9 114.7 86Z.Z3 

-- -- -- 86.5 116.4 864.Z7 

-- -- -- 35.5 117.1 879.18 

-- -- -- 8Z.7 117.9 881.Z6 

-- -- -- 38.7 IZO. 3 916.06 

-- -- -- 75.9 lZZ. 1 9Zl. 8Z 

-- -- -- 75.7 1ZZ.8 9Z4. 13 

-- -- -- 83.3 1Z3. 6 9ZS. 33 

-- -- -- 68.9 1Z4.6 930.23 

-- -- -- 31.7 1Z5.0 936.79 

-- -- -- 53.7 1Z6.1 944.16 

-- -- -- 4Z.O 1Z9.1 984.36 

-- -- -- Zl. 3 131.6 1, 037. 86 .... -- -- 4Z.3 13Z.Z 1, O-i5. 8-i 

-- -- -- 14.8 134.8 1, 115. 26 

-- -- -- 35. z 135.8 1, 13Z.. 66 

-- -- -- 13.3 137.8 1, 138. Z6 

-- -- -- 48.7 140.1 1 .. 165. 86 

-- -- -- Zl.6 14Z.Z 1,169.01 

-- -- -- zo.o 14Z.6 1,173.69 

z. 1 0.80 8. 74 21.7 145.5 1, Z47. 93 

5.1 1.7 1.ZO 37.8 l-i6.5 1, 266.93 

2. 6 1.3 5.9Z 3-i.6 147.Z 1, Z81. 87 

z. 7 1. 1 6.76 19.7 148.5 1, 317.75 

2. 5 0.19 9 .. oz zo.8 149.5 1, 3-i3. 35 

8.9 z. 8 7.60 77.8 149.8 1, 3-i4. Z5 

4.0 3.9 6.5-i Z8. 5 151.1 1.373.Z4 
.. 

Ul 

P- 7 Phosphate rock, arlfllaceous; fos. col. 

no. 48-JES-220 

P- 6 Phosphate rock 

P- 5 Phosphate rock 

p .. 4 Phosphate rock; fgs. col. no. 48-JES-219 

P- 3 Mudstone, calcareous, phosphatic 

P- 2 Mudstone 

P- 1 Phosphate rock 

Cw-1 I Limestone; los. col. no. 48-JES-218 

WOM-2933 1. 0 25.1 

WOM-2932 1. 9 33.0 

WOM-2931 3.6 33.7 

WOM-2890 1.4 26.5 

WOM-2889 1. 5 B. 5 

WOM-2874 0.9 3.9 

WOM-2873 0.2 32.8 

Wells formation 

WOM-2872 

2.8 1. 7 7.90 23.2 152. 1 1, 398. 34 

1. 2 0.63 7.38 5. 8 154.0 1, 461.04 

o. 81 0.48 7.92 4.7 157.6 1, 582.36 

3. 1 1.2 8.10 18. 1 159.0 1,619.46 

-- -- -- 53.5 160.5 1, 632. 21 

-- -- -- 66.7 161.4 1, 635. 72 

-- -- -- 5. 3 161.6 1, 642. 28 

1. 5 2.40 
.. 

"' 

DEER CREEK~ IDAHO. LOT NO. 1268. 

Phosphatic shale member of Phosphoria formation sampled in Trench I (hand trench) on north side of Deer Creek, StSWt sec. 34~ 

T. 9 S., R. 45 E., Caribou County, Idaho. Section measured and partially sampled by C. F. Deiss in 1944. Unsampled part of section 

remeasured by R. P. Sheldon and sampled by R. G. Waring in 1948. All I series samples analyzed by Tennessee Valley Authority. All 

RPS series samples analyzed by U.S. Bureau of Mines Laboratory, Albany, Oregon. 

Chemical analyses Cumulative Thickness x Sample Thickness (percent) thickness percent P ~OJ Bed Rock description no. (feet) P20S I Acid (feet) {cumulat e no. 

insoluble -- ---- -- ~- ---

Phosphatic shale member of Phosphoria formation 

P-82 Phosphate rock, calcareous 57-I 0.3 24. 1 14.9 0.3 7.23 

P-81 14udstone, calcareous RPS-2837 0.8 2. 1 64.8 1. 1 8.91 

P-80 Mudstone, phosphatic RPS-2836 1. 0 5.2 -- 2. 1 14. 11 

P-79 Mudstone, calcareous RPS-2835 2.0 1. 6 69.7 4.1 17.31 

P-78 Mudstone, calcareous RPS-2834 6.0 0.3 57. 1 10. 1 19.11 

P-77 Mudstone, calcareous RPS-2833 0.4 0.4 74.4 10.5 19.27 

P-76 Jludstone, calcareous RPS-2832 4.5 2.3 67.9 15.0 29.62 

P-75 Limestone RPS-2831 2.3 0.9 13.4 17.3 31.69 

P-74 Mudstone and phosphate rock RPS-2830 0.7 11.4 62.2 18.0 39.67 

P-73 14udstone RPS-2829 1. 8 1. 9 78.9 19.8 43.09 

P-72 Phosphate rock RPS-2828 0.5 27.4 11.2 20.3 56. 79 

P-71 lludstone, calcareous RPS-2827 3.4 1.4 74.4 23.7 61.55 

RPS-2827 through RPS-2837 equivalent to Deiss' unit nos. 69 through 73. 

P-70 Phosphate rock 56-I 0.8 35.5 4.4 24.5 89. CJS 

P-69 Phosphate rock 55-I 1. 3 33.8 6.8 25.8 133.89 

P-68 Mudstone, phosphatic 54-I 0.8 9.0 61.8 26.6 .!.!!:!! 

P-67 Limestone -- o. 9 -- -- 27.5 .... P-66 Phosphate rock and mudstone 53-I 2. 3 Zl. 8 30.5 29.8 so. 14* 

P-65 Phosphate rock 52-I 1.7 32.0 6.4 31.5 104.54 

P-64 Phosphate rock and mudstone 51-1 1. 8 17.0 40.7 33.3 135.14 

P-63 Phosphate rock 50-I 1. 0 34.4 4.7 34.3 169.54 

P-62 Phosphate rock 49-I 2.0 34.3 4.6 36.3 238. 14 

P-61 Phosphate rock, contains limestone nodules 48-I 2.5 20.1 11. 1 38.8 288.39 

P-60 Phosphate rock 47-I 3.5 25.4 lZ. 5 42.3 377.29 

P-59 Phosphate rock, contains limestone nodules 46-I 3.8 18. 1 29.6 46.1 446.07 

P-58 Limestone, argillaceous 45-I 2.5 2.3 35. 1 48.6 451.82 

P-57 Phosphate rock and mudstone 44-1 1. 7 16.7 32.2 50.3 480.21 

P-56 Mudstone, phosphatic 43-I 4.2 13.0 47. 1 54.5 534.81 

P-55 Phosphate rock 42-I 0.9 28.0 18. 7 55.4 560.01 

P-54 Mudstone 41-I 1.4 6.0 69.8 56.8 568.41 

P-53 Phosphate rock, argillaceous 40-I 0.5 24.2 22.8 57.3 580.51 
P-52 1 Mudstone, phosphatic I 39-1 I 2.4 I 10. 7 I 59. 5 I 59. 7 I 606. 19 

P-51 Limestone RPS-2826 1.0 1. 3 12.0 60.7 607.49 

RPS-2826 equivalent to Deiss' unit no. 49. 

P-50 Mudstone, calcareous 38-1 1.3 3. 2 59.3 62.0 611. 65 

P-49 Mudstone, phosphate rock, and limestone 37-1 1.8 14.6 39.9 63.8 637.93 

P-48 Mudstone 36-I 2.2 2.2 78.7 66.0 642.77 

P-47 Mudstone 35-1 1. 5 4.7 64.5 67.5 649.82 

P-46 Mudstone 34-1 2.7 2.6 76.3 70,2 656.84 

P-45 Phosphate rock and mudstone 33-1 1.5 13.4 43.8 71.7 676.94 

P-44 Phosphate rock and mudstone 32-1 1.2 22.6 25.8 72.9 704.06 

P-43 Mudstone 31-1 7. 3 2.4 66.5 80.2 721. 58 

P-42 Phosphate rock and mudstone 30·1 1. 2 17.5 42.9 81.4 742.58 

P-41 Mudstone and phosphate rock 29-1 0.7 9.6 58.2 82. 1 749.30 

P-40 Limestone and mudstone, phosphatic 28·1 1.4 12.6 27.4 83.5 766.94 

P-39 Limestone .... 0.3 -- -- 83.8 -- P-38 Mudstone, limestone, and phosphate rock 27-1 3.3 9.6 39.7 87. 1 31.68 

P-37 Mudstone, phosphate rock, and limestone 26-I 2.0 7.9 30.4 89.1 47.48 

P-36 Mudstone, phosphatic and limestone 25-1 3~ 6 9.4 35.6 92.7 81.32 

P-35 Limestone RPS-2825 2.7 o. 1 12.4 95.4 81.59 

RPS-2825 equivalent to Deiss• unit no. 33. 

.. P-34 I Mudstone, calcareous 24-1 1.8 z.o 65. 1 97.2 85. 19 .... P-33 Mudstone, phosphatic Z3-I 2.0 9.2 53.3 99.2 103.59 

P-32 I Limestone RPS-2824 2. 5 0.2 11.8 101.7 104.09 

RPS-2824 equivalent to Deiss' unit no. 30. 

P-31 I Mudstone 22-1 1. 2 2.0 76.5 102.9 

I 

106.49 

P-30 Limestone 21-1 4.3 0.3 17.2 107.2 107.78 

P-29 Mudstone 20-1 4.Z 2.5 74.0 111.4 118. 28 

Limestone concretion RPS-2823 (0. 6) 0.6 3. 2 

RPS-2823 equivalent to Deiss• unit no. 26. Concretion occurs between Deiss-25 and Deiss-27. 

Limestone concretion I RPS-2822 I (1. 1) I 0.7 I 4.4 

RPS-2822 occurs within Deiss' unit no. 25. 

1 The full section was measured but only part of the section was sampled by Deiss. The I series sample data here listed are 

taken from table 9. p. 91 of Deiss• report. The beds not sampled by Deiss are included in the columnar section for Trench I 

(as shown on plates 6 and 7 of Deiss• report) and are there identified by unit numbers which do not correspond to the sample 

numbers of table 9. The beds sampled by Sheldon (RPS series) are correlated with the unit numbers of Deiss. • Cumulative data incomplete due to missing information. Computations start from zero after interruption. 
"" QO 

Bed 

no. 

P-28 

P-27 

P-26 

P-25 

--

P-24 

P-23 

P-22 

P-Zl 

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 

Chemical an~lyses 

Rock description Sample Thickness (percent 

no. (feet) Acid 

P205 insoluble 

Mudstone 19-I 5.2 2.4 74.0 

Mudstone •. phosphatic and limestone 18-I 4.5 7. 3 53.7 

Limestone RPS-2821 1. l 1. 7 18.8 

RPS-2821 equivalent to Deiss' unit no. 23. 

Phoaphate rock, artillaceous and limestone 17-I 3.4 13.6 29.2 

Limestone concretion? RPS-2819 (1. 2) 1. 4 2. 3 

RPS-2819 eq1va1ent to Deiss' unit no. 21 and occurs between RPS-2820 and Deiss-22. 

Phosphate rock and calcareous mudstone RPS-2820 0.5 15.9 31.0 

Mudstone. phosphatic and limestone 16-I 4.3 12.0 37.9 

Limestone RPS-2818 1. 2 0.9 3.0 

RPS-2818 .equivalent to Deiss' unit no. 19. 

Mudstone, phosphatic 15-I 2.4 10.2 47.0 

Phoaphate roct. calcareous, arpllaceous 14-I 1.2 20.4 ZZ.2 

Phosphate rock, calcareous 13-I 1. 5 23.3 14.5 

Phosphate rock and mudstone 12-I z.8 23.9 17.0 

Phosphate rock aJld mudstone 11-I 1.9 23.9 17.6 

Limestone, arpllaceous 10-I 3.0 5.1 20.9 

Mudstone, calcareous., phosphatic 9-1 z. 7 9.Z 45.8 

Limestone, arpllaceous RPS-2812 2.5 0.6 20.9 

BPS-2812 equiYalent to Deiss' unit no. 11. 

Phosphate rock. and mudstone 8-1 2. 7 25.2 18.4 

Phoaphate roc~ mudstone, and Umestone 7-I 3.5 18.7 34.9 

Phosphate rock and mudstone 6-I 7.6 25.4 17.6 

Limestone c.oneretion RPS-2811 (0. 6) 9. 8 12. a 

RPS-2811 concretion occurs within RPS-2810. 

Phosphate rock and calcareous mudstone 

I 

RPS-2810 1. 7 24.9 15.7 

Limestone RPS-2809 1.1 2.3 6.5 

RPS-2809 and RPS-2810 equivalent to Deiss• unit no. 7 •. 

Phosphate rock, arJillaceous 5-I 3. 0 21.9 34.6 

Limestone RPS-2808 1.6 6.6 6.9 

RPS-2808 equivalent to Deiss' unit no. 5. 

Phosphate rock 4-1 o. 8 28.0 a. 1 

Cumulative Thickness z thickness percent P Ao5 (feet) (cumulat e1 

1.16. 6 130.76 

1Z1. 1 163.61 

1Z2.2 165.48 

1Z5.6 211. 72 

-- --

126. 1 219.67 

130.4 271.27 

131.6 272.35 

134.0 296.83 

135.2 321.31 

136.7 356.26 

139.5 423. 18 

141.4 468.59 

144.4 483.89 

147.1 508.73 

149.6 510.ZS 

152.3 578.27 

155.8 643.72 

163.4 836.76 .... --

165. 1 879.09 

166.2 904.39 

169.2 970.09 

170.8 980.65 

171.6 1,003.05 
9J 

0 

Ot 

~ 

Ul 

• N 

Ot 

... 

..0 

P- 5 

P- 4 

P- 3 

P- 2 

P- 1 

Cw-5 

Cw-4 

Cw-3 

Cw-2 

Cw-1 

Phosphate rock 

Phosphate rock 

Mudstone 

Limestone, argillaceous 

Phosphate rock 

Limestone 

Phosphate rock 

Limestone 

Phosphate rock 

Limestone 

** Note incompleteness of cumulative data . 

3-I 

2-1 3. 1.5 zI ~z. 33.0 1 

1-I 0.9 2.9 

RPS-2807 3. 5 0. 3 

RPS-2806 0.5 31.2 

Wells formation 

RPS-2817 7. 0 1.2 

RPS-2816 o. 1 33.4 

RPS-2815 3.0 1.9 

RPS-2814 o. 1 34.6 

RPS-2813 1. 8 o. 7 

.. ! I 174.8 1, 105. 77 

3. 9 176.3 1, 155.27 

71.8 177.2 1,157.88 

38.8 180.7 1, 158. 93 

6. 8 181.2 1, 174. 53•• 

s. 6 7.0 8.40 

4. 2 7. 1 11.74 

3. 8 10. 1 17.44 

5. 9 10.2 20.90 

6. 1 12.0 Z2. 16