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:	Geology > Colorado. Geology, Stratigraphic > Tertiary. Geology. Geology, Stratigraphic. Tertiary Geologic Period. Colorado. From 2 to 65 million years ago
Online Access:	https://purl.fdlp.gov/GPO/gpo68329

Available Online