Bentonite Deposits of the Northern Black Hills District Wyoming, Montana, and South Dakota (open access)

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

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.
System: The UNT Digital Library
Geology and Mineral Deposits of the Carlile Quadrangle, Crook County, Wyoming (open access)

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

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
System: The UNT Digital Library
A Preliminary Report on the Precambrian Iron Deposits Near Atlantic City, Wyoming (open access)

A Preliminary Report on the Precambrian Iron Deposits Near Atlantic City, Wyoming

This report studies the Precambrian iron deposits and major geological features near Atlantic City, Fremont County, Wyoming.
Date: 1963
Creator: Bayley, Richard W.
System: The UNT Digital Library
Distribution and Thickness of Devonian Rocks in Williston Basin and in Central Montana and North-Central Wyoming (open access)

Distribution and Thickness of Devonian Rocks in Williston Basin and in Central Montana and North-Central Wyoming

This report studies Devonian rocks in an approximately 200,000-square-mile area between Williston Basin, central Montana, and north-central Wyoming.
Date: 1961
Creator: Sandberg, Charles A.
System: The UNT Digital Library
Geology of the Crazy Woman Creek area, Johnson County, Wyoming (open access)

Geology of the Crazy Woman Creek area, Johnson County, Wyoming

This report follows the geological study of the Crazy Woman Creek area in Johnson County, Wyoming where oil, gas, and coal investigations were made.
Date: 1955
Creator: Hose, Richard Kenneth
System: The UNT Digital Library