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Bentonite Deposits of the Northern Black Hills District Wyoming, Montana, and South Dakota

Description: From abstract: The northern Black Hills bentonite mining district includes parts of Crook County, Wyo., Carter County, Mont., and Butte County, S. Dak. Within this district, many beds of bentonite occur interspersed with sedimentary strata of Cretaceous age that have an average total thickness of about 3,000 feet and consist chiefly of marine shale, marl, and argillaceous sandstone. The bentonite beds occur in formations ranging upward from the Newcastle sandstone to the lower part of the Mitten black shale member of the Pierre shale. Tertiary (?) and Quaternary deposits of gravel, sand, and silt are present on extensive terraces, and deposits of such materials also extend along stream courses in all parts of the district.
Date: 1962
Creator: Knechtel, Maxwell M. & Patterson, Sam H.

Geology and Mineral Deposits of the Carlile Quadrangle, Crook County, Wyoming

Description: From introduction: Geologic mapping of the Carlile quadrangle, which includes one of several uranium-producing areas in northeastern Wyoming, was undertaken to provide a detailed geologic map that could be used as an aid to further exploration for uranium deposits; to study in detail the known uranium deposits to determine whether or not there are any relations among structure, stratigraphy, lithology, and uranium deposits; and to outline, insofar as possible, areas favorable for more detailed exploration for uranium.
Date: 1961
Creator: Bergendahl, M. H.; Davis, Robert E. & Izett, Glen Arthur

Preliminary Reconnaissance Survey for Thorium, Uranium, and Rare-Earth Oxides, Bear Lodge Mountains, Crook County, Wyoming

Description: Report discussing a geological examination that took place in August 1950. During this examination, an area about 6 miles north of Sundance in the Bear Lodge Mountains of Crook County, Wyoming, was examined for thorium, uranium, and rare-earth oxides and samples were collected.
Date: April 1953
Creator: Wilmarth, V. R. & Johnson, D. H.

Uranium Deposits of the Carlile Quadrangle, Crook County, Wyoming

Description: From abstract: The uranium deposits in the Carlile quadrangle, southwestern Crook County, Wyo., are in relatively flat-lying sandstone beds in the lower part of the Inyan Kara group of Early Cretaceous age. The Carlile mine has the largest deposit in the quadrangle; the ore minerals are carnotite and tyuyamunite associated with carbonaceous material in a sandstone lens.
Date: August 1957
Creator: Bergendahl, M. H.