AIRBORNE RADIOMETRIC SURVEY OF THE BROWNS PARK FORMATION, CARBON COUNTY, WYOMING

E

nergy

''t!AIM!W185'

'

(u .-.)c.~

RME

1055

(Rev.)

UNCLASSIFIED

r

UNCLASSI Fl ED

l18RARY COP

Y

@

RME-1055(Rev.)

GEOWGY AND MINERAWGY

UNITED STATES ATOMIC ENERGY COMMISSJON

AIRBORNE RADIOMETRIC SURVEY OF THE BROWNS PARK FORMATION, CARBON

COUNTY, WYOMING

By

Dan N. Magleby Neil S. Mallory

December 20, 1954

Denver Exploration Branch Division of Raw Materials Denver, Colorado

Technical Information Service Extension, Oak Ridge, Tenn.

Me~a State College libra,y Grand Junction, CO

LEGAL

NOTICE

_ _ _

_ __,

This report was prepared as an account of Government sponsored work. Neither the United States, nor the Commission, nor any person acting on behaU of the Commission: A. Makes any warranty or representation, e~ress or implied, with respect to the accuracy, completeness, or usefulness of the Information contained in this report, or that the use of any Information, apparatus, method, or process disclosed in this report may not Infringe privately owned rights; or

B. Assumes any liabilities with respect to the use of, or for damages resulting from the use of any information, apparatus, method, or process disclosed In this report.

As used in the above, "person acting on behalf of the Commission" includes any em-ployee or contractor of the Commission to the extent that such emem-ployee or contractor

prepares, handles or distributes, or provides access to, any Information pursuant to his employment or contract with the Commission.

This report has been reproduced directly from the best available copy.

Printed in USA. Price 20 cents. Available from the Office of Technical Serv-ices, Department of Commerce, Washington 25, D. C.

-~

r

.J· _{OF THE BROWNS} AIRBORNE RADIOMETRIC SURVEY _{PARK FORMATION} CARBON COUNTY, WYOMING

CONTENTS

RME-1055

(Rev.) .ABSTRA.CT - - -

4

INTRODUCTION - - -

4

PHYSIOGRAPHY - - -

4

Topography Vegetation Accessibility GEOIDGY - - - -Structure Stratigraphy Location of Anomalies

5

AIRBORNE PROCEDURES - - - 8

GROUND INVESTIGArION PROCEDURES - - - ~ - - - - 8 OTHER WORK IN THE AREA - - - 18 CONCLUSIONS AND RECOMMENDATIONS - - - -. - - - l.B REFERENCES - - - 19

ILLUSTRATIONS Table I Stratigraphic Sectton of.the Browns

Park Formation - - - 6 Table II Sua?ma.ry of Anomalies - - - 9

Plate 1 Airborne Located Anomalies, Carbon County,

Wyoming - - - 20

-3-AIRBORNE RADIOMETRIC SURVEY OF THE BROWNS PARK FORMATION

CARBON COUNTY> WYOMING ABSTRACT

RME-l0.55(Rev.)

A.~ airborne radioretric survey of the Browns Park formation (Tertiary) was conducted by the Atomic Energy Commission from September 19.53, to November 19.53, in the vicinity of Miller Hill and Baggs, Wyoming. Fifty-four anomalies were discovered. Assays from four of the anomalies indicate the possibility of commercial deposits of uranium.

INTRODUCTION

In the fall of 19.52 au. s. Geological Survey DC-3 aircraft,

equipped with scintillation counter, detected eleven areas of anoma-lous radioactivity in the Miller Hill area of t,.qoming. The anomalies, located in an algal limestone about 33.5 to 400 feet above the base

of the Browns Park formation, were checked and sampled by the

u. s.

Geological Survey at that time(l).

L~tensive airborne reconnaissance of the area by the Atomic Energy Connnission started on September 10, 19.53, and was completed by November 1, 19.53. During this period 865 hours of flying were

logged and .54 areas of anomalous radioactivity were detected (Plate 1). The Browns Park formation in Carbon County, Wyoming, was covered

by airborne reconnaissance, and sore fiights were made over other formations which crop out within the area.

Neils. Mallory, geologist, and Jack Bethel, pilot, comprised the airborne crew. Dan N. Magleby was the ground reconnaissance

geologist; Jonathan P. Hadfield made detailed examination of the deposits.

PHYSIOORAPHY

Topography

The Miller Hill area, spanning the continental divide, is a broad plateau with the principal drainage systems cutting deeply into the gently rolling surface. Elevation along the continental divide generally is above 8,000 feet; the drainage lines, however, lie about

6,500

feet along the southern edge and about 6,800 feet

elsewhere. West of Baggs, Wyoming, is a small plateau with a poorly developed drainage pattern.

Vegetation

Vegetation is characterized by sagebrush and grass. Along the streams there are meadows with a few cottonwood trees. In the mountains southeast of Miller Hill there is an abundant growth of pine.

Accessibility

There are paved highways on the east and west sides of Miller Hill. Wyoming State Highway 330 goes north through Baggs, and

joins Uo S. Highway 30 twenty-six miles west of Rawlins, Wyoming.

In the Miller Hill area, and in the area l'rest of Baggs, there is a network of secondary roads suitable for travel by passenger car. A jeep can be driven to almost any part of the area. (Plate 1).

GEOI.OOY

The areas described in this report are on the eastern side of the Washakie Basin and on the divide between the La.ramie and the Washakie Basins. The Browns Park fomation (upper Tertiary) unconforma.bly overlies strata from Precambrian to Eocene age. Several anticlines and faults L"l the older formations are exposed wb:!re the Browns Park formation has been removed by erosion. In

some localities these faults cut the Browns Park formation. Stratigraphy

Inasmuch as most of the anomalies found during this survey are in the Brow=is Park formation, only this formation will be described. Table 1 is a stratigraphic section of the Browns Park adapted

from Uo

s.

Geological Survey circular 278 (1).

Plate l indicates the areal extent of the Browns Park forma-tion and the locaforma-tion of the anomalies.

Location of Anomalies

The anomalies in algal limestone in the Browns Park formation are due to a carnotite-type mineral filling fractures in the upper few inches. Uranium has not been found in conmercial quantities

:L~ this lim:3stor.e.

Carnotite-type minerals are found also in the sandstones of the Browns Park formation. Insufficient work has been done on these sandstones, however, to accurately place all of them stratigraphically within the formation. The sandstones in the anomalous area are crossbedded and eitrer calcareous or ferruginous

-5-TABLE I

STRATIGRAPHIC SEX;TION OF BROWNS PARK FORMATION ON MIDDLEWOOD HILL (Units are numbered consecutively from oldest to youngest)

Unit

No.

15

13

12 11 10 9 8 Thickness (feet)

500

100 12

25

55

30

50

10 Li~hologic Character

Sandstone, white to.light-gray, very tuffaceou.s, soft, .fine- to coarse-grained, evenly bedded, with many resistant liJ!:Gr layers that .form persistent ledges. Top of unit caps Middlewood Hill. Sandstone, 'White to gray, limy tuf.faceous interbedded with white, crystalline, nodular, sandy, tuf.fac_eous limestone.

Algal limestone marker bed, gray, hard, very

ragged and nodular on weathered surfaces, with

some tuffaceous sandy beds l to 2 feet thick in lower two-thirds; pseudo-oolitic in lower 2 feet, contains abundant vertical root tubes, some of which fluoresce brilliant yellow under ultra-violet light; top 6 feet contains masses and fracture .fillings or dark-gray to brown chalcedony and opal; chalcedony and limestone

both quite radioactive; unit is widely persistent throughout area and seems to have abundant algal growthso

Sandstone, gray, grac;ling'into sandy limestone, highJ3 nodular, weatberil'.lg into ragged porous ledges; ·has appearanGe of. l;)eing partly calcareous tu.fa.

Sandstone, gray, limy intergrading with gray sandy li.n2stone similar to overlying unit, but softer

in lower half, forms slope; about l .foot of dark-gray tu.ff

35

feet below top.

Sandstone, gray, hard, very limy, weathering into ragged ledges. Uraniferous.

Sandstone, white to light-gray, soft, fine-grained, very tuf.f aceous, partly micaceous; many black

grains, very few red grains.

Sandstone, rusty-brown, ferruginous, soft, coarse-grained; contains small pebbles.

Table I ~ Unit No. t 7

-~

6

5

4

3 2 1 ,

.

(cont'd) Thickness (feet)

15

40

40

10

35

20-100

957-1,037

Lithologic Character

Tuff, white to gray, very soft, light weight,

interbedded with some gray sandstone.

Sa.'1.dstone, rusty-gray, hard, cross-bedded to

evenly bedded, fine-grained; forms slabby ledge. Tuff, chalky white, thi.."1.-bedded to irregularly bedded, nodular :L"l part; interbedded with some

gray fine-grained t'..lffaceous sandst.one.

Sandstcne, gray, soft, inter'bedded with gray tuff. Quartzite, iron-gray, fine-grai.Ii.ed, very hard; breaks with conchoidal fracture into sharp angular

fragments; a very persistent unit.

Sandstone, gray, hard, slabby, with frosted rounded quartz grains; interbedded with drab soft, blocky tuffaceous claystor.e.

Conglomerate, gray, composed of boulders of

Pre-cambriar.. rocks and Paleozoic formations as much as

4

feet in diameter but averaging about 2 inches. Contact between Browns Park f-0rmation and Nugget sandstone is a remarkably plane surf ace, everywhere obser-..red, regardless of the resistant or weak

character of the underlying rocks and regardless of t~e attitude of these rocks.

Approximate thickness of Browns Park formation.

-7-or both. The radiometric readings are generally higher where iron or mang;inese dendrites occur in the bedding planes and tension

crackso Four of the anomalies -- 30,

45, 49,

and

51

--

probably have conmercial possibilities.

AIRBORNE PROOEDURES

The flying was done in a

PA

18, 135

horsepower Super Cub

high-wing monoplane equipped with a Mark VI airborne scintillometer. Since the objective of the survey was to prov.i.de complete coverage of the area underlain by the Browns Park formation, both rim and grid coverage were employed; special effort was made to fly all rim outcrops. At first, rim flying was concentrated on the algal limestone, but as concentrations of uranium minerals were found in the sandstone, a special effort was made to include all

small hills and erosional cuts where the sandstone might be

close to the surface.

Control for the survey was maintained by the use of

u.

S. Geological Survey topographic maps, a photo mosaic of the area, and the geological map of Carbon County

(2).

In flying to and from the area other formations were checked and it was noted that the Wasatch formation near Miller Hill registered a high radiometric background.

GROUND INVESTIGATIONS PROCEDURES

All anomalies discovered by the airborne radiomatric survey

were investigated on the ground. Table II summarizes ~ormation concerning the anomalies; the locations of the anomalies are shown on Plate 1.

The most promising uranium showing in the Miller Hill area is at Anomaly 30 on Ketchum Buttes (Table II).

An unidentified uranium mineral was observed as thin coatings along bedding planes in a band 12 feet down from the top of a 60-foot sandstone escarpment at the Avon Brock prospect (Plate I).

From the standpoint 0£ potential production, an area of low-to 11)3dium-grade radioactive material in parts of sections

4 and

5,

T. 12 N., R. 92 W. about 7 miles west of Baggs, Wyoming (Plate 1), appears to be the most important. There are uranium minerals in

several exploratory pits in a friable fine- to medium-grained, variegated, limonitic and hematitic sandstone. Two uranium minerals are believed to be present: carnotite, and a green and pale yellow-green material that fluoresces bright green (probably meta-autunite and some schroeckingerite). The material contains

• (I

)

)

)

TABLE II SUMMARY OF ANOMALIES c• Anomaly Sample

Number Number

%U30a

Radioactivity Rock Description

1

24988

0.02

Surface -

80

cps. Light brown, very fine-grained, argillaceous Pit

2

1 _-

₁₇₅

_{cps. sandstone. North Park formation.}

2

24989

0.03

Surface -

175

cps. Fine- to coarse-grained, calcareous, limonitic sandstone. Also manganese staining. North Park

~ formation.

I

3

24984

Trace Surface -

120

cps. Grat'-green, very fine-grained, calcareous sand-Pit

2'

-

200

cps. stone f'loat.

4

24985

0.01

Surface -

150

cps. Fine-grained calcareous sandstone and brown to black chalcedony. Possible uranium minerals visible.

5

24986

0.04

Surface

-

900

cps. Brown and black chalcedony in limestone.

6

24990

Trace Surface

- 120

cps. Fine-grained, dark grey sandstone and sandy limestone.

7

24991

Trace Surface - 90 cps. Soil and alluvium (calcareous).

24992

0.02

Pit

5

1 _-

₁₅₀

_cps.

8

24995

0.02

Surface -

120

cps. Grq, arenaceous float, (limestone).

TABLE II (Cont'd)

Anoma~ Sample

Number Number

_%U3os

Radioactivity Rock Description

I

9

24994

0.01 Surface - 200 cps. Dark brown chalcedony. Vugs filled with limonite. Pit 6" - 27, cps •

.

10

24993

0.01 Surfac~ - 150 cps. Dark brown and black chalcedony in ,sandy lime.stone.

Pit 1}1 _{- count} decreased

•

_{.Dark brown and black chalcedony}

_tn

_sandy

limes.tone. -·

b

11 ·24996 0.02 S~face -

400

.

~ps,

l

..

~

.

Vugs _in the cl'talc.e4ony·

.

aie

co_~ted with limonita.

···.:: . ' .

12 2499.7 Trace Surf ace - ·80 cps_. :.

P:lt

2t'

·

-

100 ·cps.

Gra1 ,cind br.own, f~e"".graµied . sandst.one float.!.

13 2_4998 0~007 · Surface - JOO cps. Gray·and brown calcareous .sandstone with manganese Pit

3'

- 500

cps. dendrites -and caliche.

24999 0.016 Surface -

_.

250 cps. Ar~naceous limestone with in9luslona ·of limonite~

· stained sand.

15 25000, 0.031 · Surface

- 400

.cps. Ax:e~aceous limestone with,:·1.n~iusions of limon;lte-. -sta;lned sand.

-.•

16 ·25362. _{0 .• 045} Surface - 200.cps. Erosional renmants .of ·chaJ:cedony'boulders.

.·

.

:

·:,·

...

17 25363 o·.02 Surface - .300 cps. Dark brown chal-0edony that

has

yugs filled with limonite .•

)

Anomaly Sample

Number Number _%U308

18 25364 0.009 19 25365 0.011 20 25366 0.011 I

t:::

_I 21 25367 0.008 22 25368 0.008 23 25369 0.013 24 25 25370 0.012 26 25430 Trace 25431 Trace

)

I ,,r I

)

TABLE II (Cont'd)

Radioactivity Rock Description

Surface - 120 cps. Red, brown and black chalcedony float.

Surface - 200 cps. Red, brown and black chalcedony in an arenaceous limestone.

Surface - 120 cps. GraY arenaceous limestone float.

Surface - 70 cps. Gray and brown, fine- to medium-grained sandstone Pit 11• - 110 cps. Caliche on fractures.

Surface - 120 cps. Gr~-green, fine-grained calcareous sandstone. Pit

1t•

- 200 cps.

Surface - 100 cps. Crystalline, arenaceous linestone with manganese Pit 2}1 _{- 325 cps. and limonite staining.}

Surface - 100 cps. Crystalline, arenaceous limestone with manganese Pit 2!' - 250 cps. and limonite staining.

Surface - 250 cps. Pit

3' -

275 cps.

Fine-grained, arenaceous, limonite sandstone. Surface - 200 cps. Soil containing blue-green shale and fine-grained, Pit 2}1 _{- 275 cps. brown sandstone float.}

Pit

3'

- 400 cps. Pit

3'

- 500 cps.

Anomaly Nwnber

27

28

29 30

31

32

33 Sample Number

25371

25372

25373

25374

25432

25433

25434

25435

25436

25437

25438

25439

%U306

0.007

0.035

Trace

0.007

0.10

0.30

0.80

0.02

0.03

0.01

0.01

0.06 TABLE II (Cont'd) Radioactivity Surface -

550

cps. Pit

3' - 800

cps. Surface - 90 cps. Pit

li'

- 130

cps. Surface -

400

cps. Pit

6

11 _-

450

_cps. Surface -

1200

cps. Pit 21 _-

₁₅₀₀

_cps. Pit

3' -

3500

cps. Pit 31 _{- 2500 cps.} Surface - 120 cps. Pit

4'

-

250

cps. Surface -

450

cps. Pit

4' -

lOOO cps. Surface -

450

cps.

4' ·

auger hole -

o.2

mr./br.

slight

de-crease with depth. Surface - 1200 cps. Pit

4' -

800

cps.

Rock Description

Soil with blue-green shale and fine-grained sand-stone float.

Light to dark gray, calcareous shale. North Park formation.

Crystalline limestone, sandy in part, and chalcedony. Varies from an arenaceous crystalline limestone to a very fine-grained, limonitic and hematitic semi-con-solidated sandstone. Visible radioactive min3rals, probably carnotite and schroeckingerite.

Sandy shale.

Very fine-grained, gray-green sandston:3 containing clay galls.

..

)

Anomaly Sample

Number Number

%U30a

34

25440

Trace 35

25441

0.01

25442

0.03

25443

0.01 I ~ I

36

25444

37

25445

0.02

38

25446

0.01

39

25447

o.oo6

40

25448

0.006

41

25449

0.01

)

.

.,.

.

)

TABLE II (Cont'd)

Radioactivitz Rock DescriEtion

Surface - 350 cps. Dark brown chalcedony.

Surface~

2000

cps. Thin-bedded, fine-grained, dark gray quartzite.

Pit

2f

1 _-

₃₅₀₀

_{cps. Possible uranium minerals.}

Count decreased be-low this level.

Surface -

200

cps.

Pit

2'

-

325

cps •.

Fine-grained, calcareous sandstone.

Surface -

250

cps. Fine-grained, calcareous sandstone.

Pit

2

1 _-

₂₇₅

_cps.

Surface -

100

cps. Dark brown and black chalcedony.

Pit

6"

-

200

cps.

Surface -

125

cps. Fine-grained gr83'-green, limonitic sandstone,

Pit 21 _-

₂₂₅

_{cps. semi-consolidated.}

Sur.face -

550

cps. Fine-grained, gra_y sandstone! Caliche in

Pit

2

1 _-·

₁₁₅₀

_{cps. places.}

Surface

500

to Grey, yellow, green, fine-grained limonite and

1000

cps. • hematite stained. Highest radioactivity con-Pit

li' -

JOOO cps. nected with greatest concentration of iron

TABIE II (C-Ont 'd)

Anomaly Sample

Number Number _%U30s Radioactivity Rock Description

42 25450 0.02 Surface - 2000 cps. Fine-grained, variegated, semi-consolidatod sand-(extends over an area stone. Caliche on bedding. Faint yellow streaks of 50 sq. ft.) (1-3") in sandstone probably a uranium mineral. Pit 2' - 4200 cps.

Surface - 2000 cpso Very fine-grained, gray and yellow, calcareous

I sandstone, argillaceous in parto Faint yellow

t:

streaks in sandstone probably a uranium miner~.

I

43

Surface - 1200 cps. Fina-grained, friable, gray-green sandstone. Pit 2' - 2500 cps. Little limonite staining.

Surface - 2000 cps. Fine-grained.§ friable, green-yellow and gray sand-Pit 2' - 3200 cps. otone. Trace of a yellow uraniu.m mineral

dissemi-nated in sandstone in thin streaks.

45 33051

0.93

:Vax. surface - 2000 Fine-grained, friable, green-gray ~andstone.

cps. Pit 21 _.3000..~. . _{Limonite and manganese staining • Some sooty carbon}

(count d9creased me.terial is present. False bedding (cross-bedding) slight~ below 1 ft. st.rikes 80° E and dips lio0 _{N. Yellow uranium}

level). mi.~ral disseiWla. t..ed in thin. bands in sandstone. 46

₃₃₀₅₂

0.06 Surface - 500 cps. Limon.i.tic, fine- and angulclr-grained, fr5.able

sand-Pit 2' - 2500 cps. atone. Thin lenses (~1") of medium- to coarse-grained sandstone in the fine-grained sandstone.

)

•

G:

l Anoma.l.3 Number

47

48

49

50

1 h Sample Number

33053

33054

33055

33056

0.02

0.02

0.29

)

)

TABIE II (Cont'd) Radioactivit,; ~ . surface

-600

cps. Highest count of

2500

cps.

6"

below surface. Count decreased be-low 6" • Surface 1000 cps. Highest radiom:ltric reading is

6

11 _below surface - 3000 cps. and 1

mr/hr.

Count decreased below 611 level. Rock Description

Fine-grained, friable, white, orange and gray cal-careous sandstone.

Fine- to medium- and angular-grain9d, limonitic sandstone. Outcrop of cross bedding strikes N.

75°

W. and dips 30° N.

Surface - 1000 cps. Friable, limonitic, fine-graf:hed sandstone. Outcrop Max. count ~n pit is of cross bedding strikes N. 350

w.

1 dips

25°

N. Minor

611 _{below surf ace - amounts of a yellow uranium mineral disseminated in}

2700 cps. and 1.2

mr/hr.

sandstone adjacent to bedding. Surface - 1000 cps.

Max.

in"l' pit

-3000

cps. and 1.2 mr/hr Surface - 120 cps. In pit 6° deep -300 cps

Friable, fine-grained, limonitic sandstone. Minor amounts of a yellow uranium mineral disseminated in

the sandstone and directly associated with the limonite.

Anomaly Number

52

Sample Number

.3.3057

33058

33059

0.08

TABLE II (Cont'd) Radioactivity Sur.f'ace - 1200 cp~.

In pit highest

ra~o-activity is

6

11 _below

surface - 1500 cps.

Pit on north side

of hillo Surface~ 1000 cps. Pit 21 -5000

cps.

an

_

d

3

mr/br

Max.

surface - 1100 cps. _Pit 21 - 2000 cps. Rock Descrip~i6n

Hematitic and limonitic, fine- to medium-grained

friable sapdstone o Minor amoUJ1ts of a yellow µr.anium

mineral disseminated in sandstohe and closely

aasoci-a ted with hematite. ··

Fer:niginous, fine-grained, friable sandstoneo High

count in a 2 to

6tt

band of sandstone that has

dissem-inated in it a yellow uranium mineral, probabl,y c-arno-tite.

Unconsolidated., fine-grained., gray. and brown sandstone.

Heavy caliche cover on bedding.

53

This·entire butte registers radioactivity 2 to 10 times background. Pits were dug in areas of high

surface radioactivity.

33060

0.01

East end of butte

Surface - 800 cps.·

Max.

in pit 2}' -2500 cps-. Southeast end of butte. Surface -800 cps. Pit 21 -1100 cps.

Hard, thin-bedded., gray., fine- to medium-grained limy

sandstone. Limonite stain is host to highest radio-activity.

Fine-grained., green-gray., limonitic sandstoneo A

)

I ~ _I

\

.

r

-Anomaly Number Sample. Number

33061

0.02

••

·-

.

,. . TABJ..E II (Cont I_d) Radioactivity . t . '

South .end.of butte.

Surface -- 800 cps.

Pit 41 _{- 4000 cps.}

•

Rock .!)ascription

Fine- to medium-grained, poorly sorted, green-yellow, friable sandstone. Limonite staining· in part •

Radioactivity-ioo to Fine-grained, orange and gray friable sandstone. 300 cps. covers· the

/

as mu.ch as

9o03

percent U305• In many places the high radioactivity is associated with heavy limonite and hematite stains that obscure the color of the uranium minerals.

OTHER WORK IN. THE

AREA

The

u.

s.

Geological Survey in November,

1953

made another radiometric survey and discovered

165

anomalies

(3,

4,

5,

6

and

7)•

Subsequent to the publication of the anomaly locations.f private

operators staked claims in the area west

ot

Baggs, Wyoming, and

in the spring of

1954

carried Qn stripping and trenching which un•

covered some showings of uranium..

CONCLUSIONS AND REX':OMMENDAT

rom

As a result of the Atomic Eilergy- Commission

survet,

54

anomalies

were located, four of which indicate uraniwn deposits

ot

possible

economic importance; the deposit at ItetchUlll Buttes and. three

anoma-lies in the area west of Baggs»

Wyoming, are

the aost promising.

The deposits from which assays of over 0.20 percent urani~ were

ob-tained are found in a non-ealcareous sandstone .. ~ .carnotite•

type mineral deposits in limestone do not seem to. contain sufficient

uranium to be considered. ore grade.

In· view of the occurrence ot uranium millerals in the Browns

Park formation in the Miller Hill and Baggs area,:an

airborne

radiometric survey of all outel"Qps in this torma'iion in the

Washakie Basin may be profitable.

The

high background of the Wasatch formation suggests a

similar

survey on its.'.outerops

..

"'

REFERENC.ES

1. U>ve, Jo

D.,

Preliminary Report of Uranium Deposits in the

Miller Hill Area, Carbon County, Wyoming: U. S. Geolo

Survey Circ.

278, 1953.

2. Weitz, J. L. and love, J.

D.,

Geological Map of Carbon County, Wyoming: Wyo. Geol. Survey,

1952

•

3.

Henderson, J.

K.,

Airborne Radioactivity Survey of Parts of

Baggs SW and SE Qu.adrangl.es, Carbon and Sweetwater Counties,

Wyoming:

u. s.

Geol. Survey,

TEM-743,

1954.

4.

Henderson, J.

K.,

Airborne Radioactivity Survey of Parts of

Sand Creek

SW

and Sand Creek SE Quadrangles, Sweetwater

County, Wyominga

u.

S.

Geol. Survey,

TEM-744,

1

954.

5.

Henderson, Jo

K.,

Airborne Radioactivity Survey or Parts of

Savery SE and Savery SW Quadrangles, Carbon County, Wyoming:

Uo S. Geol. Survey,

TEM-745, 1954.

6. Henderson, J.

K.,

AirQorne Radioactivity Survey of Parts of

Saratoga NW, Carbon County, Wyoming:

u. s.

Geol.

Survey,-TEM-746, 1954.

7.

Henderson, J.

K.,

Airborne Radioactivity Survey of Parts or

Savery NW and Savery NE Quadrangles, Carbon County,

Wyomingt Uo So Geolo Survey,

TEM-747,

1954

.

-19-I

i

;

_)

-<

L ____

_

·•