UNITED STATES DEPARTMENT OF THE INTERIOR
GEOLOGICAL SURVEY

BULLETIN 1030 PLATE 14

\
7 \PeRveraeany a 4
% tMADISON

3. Argillite of Triassic(?) age
IDAHO
! Benewah County:
4. Prichard formation
Kootenai County:
5. Prichard formation
q 6. Prichard formation
Shoshone County:
7. Prichard formation
' 8. Prichard formation
9. Prichard formation
Custer County:
10. Garden Creek phyllite
: 11. Garden Creek phyllite
+12. Saturday Mountain formation
13. Saturday Mountain formation
14. Ramshorn slate
Ie 15. Phi Kappa formation
q Blaine County:
16. Milligen formation
17, Milligen formation
18. Milligen formation
Clark County:
19. Unnamed black shale
Butte County:
20. Unnamed black shale
Ny Caribou County:
=i. 23) 022 21. Brazer limestone
[ 2 ‘© BEAR Bear Lake County:

5 3 22. Brazer limestone
es A oe 23. Spence shale
Vase (aaa Oneida County:
CACHE 30
) ak ia ia
a

I 24. Spence shale
| \ Be . } Cache County:

1 ’

'

'

‘\ a
(6) ler

r -—!

1 UTAH

RICH 25. Spence shale
a ' 26. Swan Peak formation
Swan Peak formation
Spence shale
Madison limestone

and Leatham formation

(of Holland, 1952)
Rich County:

30, Brazer limestone

T A H 28.

200 Miles 29.

32. Spokane shale
33. Spokane shale
34. Madison limestone
Granite County:
35. Madison(?) limestone
36. Madison limestone
37. Madison limestone
Beaverhead County:
38. Madison limestone
Madison County:
39. Wolsey(?) shale
40. Madison limestone
Jefferson County:
41, Madison limestone
Gallatin County:
42. Madison limestone
43. Madison limestone
and Sappington sandstone
as used by Holland, 1952
44. Sappington sandstone
as used by Holland, 1952
Broadwater County:
45. Heath shale
46. Shale of Cambrian age
47, Heath(?) shale
48. Greyson shale
49. Greyson shale
Meagher County:
50. Heath shale
Judith Basin County:
51. Heath shale
52. Heath shale
53. Colorado shale
54. Heath shale
55. Heath shale
56. Heath shale
57. Heath shale
58. Heath shale
Wheatland County:
59. Otter formation
60. Heath shale and
Otter formation
Fergus County:
61. Madison limestone

at 7

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ate tL
| | i | ru tami
ES i ' t | ROOSEVELT, ° 4
j ' 2BLAINE, f 83, 082 i! é pa
~ _ eee
oO ae iy ys | 795 | ae ° =
\ a 2 78g! 1
7 | 4 M Of 03 ] N T | 78a" g0 N A \ <
ISOOTENAI, \ . ‘y eT © N bt lt |
Be} 7 %, }\. A fa a | Qa
" ¥ i. \— oa 7 |
al ISENEVau) ~ Lewis | oot F ER GU = a |
eH i AND | \ sLS@65% 7 =
;TM- OSHONE\. ‘Jer aRKs ‘090 087 55 . Jo ise]
na l a: ! a! nN. 1 sgt 2 rege él >|
| Le de \ punt? 1B EXPLANATION uc! a
' ws ! apes BASIN 57 © 64 4/0 265 978 = pan
< rs 4 uy ( : ee ; f — pe
i I ( a \” EAGHER] && 58 i Black shale containing .005 percent uranium or more
GRANITE 1
4M BROADS_ 50. ? ° 1
3 5 : a5 200437 a hers 49 MEATUAND os oes Black shale containing less than .005 percent uranium 1 °
[7 --—-- r Serrenson) 46 3p =e eee | Lognltty pumbee | Zz, 4
a } 5 -_- Fac one ice
Me oe \ L “Olan i FORMATIONS EXAMINED AT LOCALITIES SHOWN ON MAP i s. D AKO TA
i ~ 41, ,%e, 7
\ a oe x pk Oar earn OREGON MONTANA MONTANA-Continued
rd 7 “ = Baker County: Teton County: Fergus County-Continued
a / we 39049 2: 1. Argillite of Triassic(?) age 31. Colorado shale 634) riaath ania
2. Argillite of Triassic(?) age Lewis and Clark County: 63. Heath shale and

Otter formation
64. Madison limestone
65. Madison limestone
66. Amsden formation of local
usage and Heath shale
67. Heath shale
68. Heath shale
69. Heath shale
70. Heath shale
71. Heath shale and
Otter formation
72. Heath shale
73. Amsden formation
of local usage
74, Colorado shale
75. Heath shale
76. Heath shale
Golden Valley County:
77, Heath shale
Blaine County:
78. Lodgepole limestone
79. Lodgepole limestone
80. Lodgepole limestone
Daniels County:
2/81. Bakken formation
(as used by Nordquist,
Roosevelt County:
#82, Bakken formation
(as used by Nordquist,
83. Heath shale
Wibaux County:
£84. Winnipeg formation
NORTH DAKOTA
Williams County:
#85. Bakken formation
(as used by Nordquist, 1953)

1953)

1953)

2/Well samples

INDEX MAP SHOWING BLACK SHALE LOCALITIES EXAMINED FOR URANIUM, NORTHERN ROCKY MOUNTAINS AND GREAT PLAINS

1386909 0 ~ 56 (in pocket)