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National Geologic Map Database

Geologic Unit: Bad River

Usage:

Bad River Dolomite of Chocolay Group of Marquette Range Supergroup (recognized locally in MI*,WI*)
Notable exposures in Gogebic iron range, Northern Peninsula.


Geologic age:

Early Proterozoic*


Type section, locality, area and/or origin of name:

Named from occurrence at Bad River, in Penokee Gap section, Penokee-Gogebic district, northwestern WI (Van Hise, 1901; Van Hise and Leith, 1911).


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 ([ ]).