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 /

Bibliographic Details
Main Authors: Olson, J. C. (Jerry Chipman), 1917-2013 (Author), Hansen, Wallace R., 1920- (Author), Hedlund, David Carl, 1924- (Author)
Format: Government Document eBook
Language:English
Published: [Washington, D.C.] : United States Department of the Interior, Geological Survey, 1968.
Series:Geological Survey bulletin ; 1251-C.
Contributions to general geology.
Subjects:
Online Access:https://purl.fdlp.gov/GPO/gpo68329

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