Revisions of Stratigraphic Nomenclature Within the Keweenawan Supergroup of Northern Michigan: Issue 1969
William F. Cannon · Suzanne W. Nicholson
Jan 1992 · U.S. Government Printing Office
Ebook
74
Pages
About this ebook
A new formation name (Porcupine Volcanics) and a new group name (Bergland Group) are proposed for middle Proterozoic volcanic units in northern Michigan, and a sedimentary unit (Copper Harbor Conglomerate) is recorrelated.
A new formation name (Porcupine Volcanics) and a new group name (Bergland Group) are proposed for middle Proterozoic volcanic units in northern Michigan, and a sedimentary unit (Copper Harbor Conglomerate) is recorrelated.
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