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.)

Description
Item Description:	Shipping list number: 92-0532-P.
Physical Description:	iii, 8, iii, 57 pages : illustrations, maps ; 28 cm.
Bibliography:	Includes bibliographical references.