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

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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 … continued below

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[158] p. : ill., maps ; 23 cm.

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Knechtel, Maxwell M. & Patterson, Sam H. 1962.

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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.

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[158] p. : ill., maps ; 23 cm.

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"An investigation of the district that has supplied most of the gel-forming sodium-type bentonite produced to date in the United States."

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  • OCLC: 885120988
  • SuDoc Number: I 19.3:1082-M
  • Report No.: USGS Bulletin 1082-M
  • Archival Resource Key: ark:/67531/metadc304312

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  • 1962

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  • March 15, 2017, 12:42 p.m.

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  • June 9, 2017, 5:58 p.m.

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Knechtel, Maxwell M. & Patterson, Sam H. Bentonite Deposits of the Northern Black Hills District Wyoming, Montana, and South Dakota, report, 1962; Washington D.C. (https://digital.library.unt.edu/ark:/67531/metadc304312/: accessed January 16, 2025), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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