Revisions of Stratigraphic Nomenclature Within the Keweenawan Supergroup of Northern Michigan

• Author(s): William F. Cannon, Suzanne W. Nicholson,
• Publisher: U.S. Government Printing Office
• Pages: 74
• Language: en

Description:... 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.