Revisions of stratigraphic nomenclature within the Keweenawan supergroup of northern Michigan /
Cannon, William F.
Nicholson, Suzanne W.
Nicholson, Suzanne W.Geochemistry, petrography, and volcanology of rhyolites of the Portage Lake volcanics, Keweenaw Peninsula, Michigan.1992.
[Reston, Va.?] : U.S. Department of the Interior, U.S. Geological Survey ; Denver, CO : For sale by Book and Open-File Report Sales,
1992.
Shipping list no.: 92-0532-P.
Includes bibliographical references.
Geology, Stratigraphic
Volcanic ash, tuff, etc.
Rhyolite