Usage:
Marquette Range Supergroup (recognized locally in MI*,MN,WI*)
Notable exposures in Marquette Range, Menominee Range, Gogebic iron range, and Iron River-Crystal Falls district, Northern Peninsula.
Subunits:
(alphabetical): Baraga Group (MI*,MN,WI*), Blair Creek Formation (MI*), Chocolay Group (MI*,WI*), Menominee Group (MI*,MN,WI*), Paint River Group (MI*,WI*).
Geologic age:
Paleoproterozoic*
Type section, locality, area and/or origin of name:
Type area: exposures in and adjacent to Marquette Range, Northern Peninsula, northwestern MI. Named from Marquette Range (Cannon and Gair, 1970).
AAPG geologic province:
Lake Superior region*
Wisconsin arch*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).