Uranium-Bearing Lignite in Southwestern North Dakota Page: 3
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CONTENTS
Abstract. . . . . . . a . a a A . . . . . . * . A * * * * . 5
Introduction. ... a o .. A a.Ao A .C . e a . oa 6
Stratigraphy. . . . . A A . C * . . . . a a . a a A . . 8
Tertiary rocks . C o C . . a . . a e . A . A A . . a a . 8
Fort Union formation. . . . . A . A a . . A a . . A A A 8
Tongue River member. . . . C A . . . . . . . . . a . 8
Sentinel Butte member. C C A . . . A A . A C . 10
Chadron formation . . * . .. . A A . A . .. . e 9 . 10
Brule formation . . . . . . . . A . A A . . .AAA 11
Quaternary deposits. . . . A A . A C A A A. . A . A A A C A . 12
Surficial material. . * A A . A A C A A C A A A A A A A . 12
Structure . a a . . . . . . . . . . . A . . . A . . . A A A A * . . 12
Utanium-bearing lignite C A C C . . . A C C A . C . . A C A A A A A . 13
Bullion Butte area, Billings and Golden Valley Counties,
North Dakota . . . . o a a . . a . e . . . . . . . . . . . . . . 13
Sentinel Butte area, Golden Valley County, North Dakota. . . . . . 15
Chalky Buttes area, Slope County, North Dakota A . . . . . .. 18
Summary of reserves of uraniunwbearing lignite C . . A . . . . . . 23
Origin of the uranium n . . . . . . . . . . . A . . . . . . C a . . . . 23
Mode of occurrence of uranium in lignite. . . C A C C A A . 0 C a . 32
Literature cited. . C . . . . . . 0 0 0 C A A C o a C A A C . C . C 33
Unpublishedreports . . . . . . . 0 0 . C . . . . . C . A C . 34
ILLUSTRATIONS
Figure 1. Index map showing areas described in this report and
other areas of uranium-bearing lignite in North Dakota,
South Takota, and Montana. . . . . . A A . A . A a . 7
2. Stratigraphic sections of rocks associated with uranium-
bearing lignite in southwestern North Dakota . . C A A a a 9
3. Geologic map of the Bullion Butte area, Billings and
Golden Valley Counties, North. Dakota . . . . . . . . . 14
4. Reserves of uranium-bearing lignite in the Bullion Butte
area, Billings and Golden Valley Counties, North Dakota. . 16
5. Geologic map of the Sentinel Butte area, Golden Valley
County, North Dakota . . . . . . . .. A A A . . .. 17
6. Reserves of uranium-bearing lignite in the Sentinel Butte
area, Golden Valley County, North Dakota. . . . . . . . . . 19
7. Geologic map of the Chalky Buttes area, Slope County,
North Dakota. . . .. .. ... a a ea . . . . .(In
envelope)
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Moore, George W.; Melin, Robert E. & Kepferle, Roy C. Uranium-Bearing Lignite in Southwestern North Dakota, report, June 1954; Washington D.C.. (https://digital.library.unt.edu/ark:/67531/metadc1050240/m1/4/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.