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Tertiary volcanic stratigraphy in the Powderhorn-Black Canyon region, Gunnison and Montrose Counties, Colorado : nomenclature, lithology, and stratigraphic relations of a sequence of ash-flow tuffs, flows, and breccia / by J.C. Olson, D.C. Hedlund, and W.R. Hansen.

Record details

  • Physical Description: 1 online resource (iv, 29 pages, 1 page of plates) : illustrations, maps (some color).
  • Publisher: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1968.
  • Distributor: Washington : United States Government Printing Office

Content descriptions

General Note: Title from title screen (viewed September 15, 2014).
Bibliography, etc. Note: Includes bibliographical references (pages 28-29).
Subject: Geology > Colorado.
Geology, Stratigraphic > Tertiary.

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