Tertiary volcanic stratigraphy in the Powderhorn-Black Canyon region, Gunnison and Montrose Counties, Colorado
By: by J.C. Olson, D.C. Hedlund and W.R. Hansen.
Contributors: Hedlund, D.C.; Hansen, Wallace R., 1920-; Geological Survey (U.S.)
Series: U.S. Geological Survey bulletin -- 1251-C; Contributions to general geology
Publisher: U.S. Government Printing Office
Published: 1968
Place of publication: Washington, DC
Language: eng
Number of pages: 29
Subjects: Geology, Stratigraphic -- Tertiary.; Geology -- Colorado.
Notes: Bibliogr.

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