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Revisions of stratigraphic nomenclature within the Keweenawan supergroup of northern Michigan / by William F. Cannon and Suzanne W. Nicholson. Geochemistry, petrography, and volcanology of rhyolites of the Portage Lake volcanics, Keweenaw Peninsula, Michigan / by Suzanne W. Nicholson.

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Record details

  • Physical Description: 1 online resource (various pagings) : illustrations, maps.
  • Publisher: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1992.
  • Distributor: [Washington, D.C.] : United States Government Printing Office

Content descriptions

General Note:
Title from title screen (viewed Aug. 25, 2014).
Bibliography, etc. Note:
Includes bibliographical references.
Subject: Geology, Stratigraphic > Proterozoic.
Rhyolite > Michigan > Keweenaw Peninsula.
Volcanic ash, tuff, etc. > Michigan.
Bergland Group (Mich.)
Copper Harbor Conglomerate (Mich.)
Porcupine Volcanics (Mich.)
Portage Lake Volcanics (Mich.)

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