Revisions of stratigraphic nomenclature within the Keweenawan supergroup of northern Michigan /

Bibliographic Details
Main Author:	Cannon, William F.
Other Authors:	Nicholson, Suzanne W.
Format:	Government Document Book
Language:	English
Published:	[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; 1992.
Series:	Contributions to the geology and mineral resources of the midcontinent rift system ; ch. A-B. U.S. Geological Survey bulletin ; 1970.
Subjects:	Geology, Stratigraphic > Proterozoic. Volcanic ash, tuff, etc. > Michigan. Rhyolite > Michigan > Keweenaw Peninsula. Porcupine Volcanics (Mich.) Bergland Group (Mich.) Copper Harbor Conglomerate (Mich.) Portage Lake Volcanics (Mich.)

by Cannon, William F., Nicholson, Suzanne W.
Published 1992

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