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National Geologic Map Database

Geologic Unit: Central Mine

Usage:

No current usage.
(Rocks of †Central Mine Group (MI) reallocated to Portage Lake Volcanics. See Portage Lake.)


Geologic age:

Mesoproterozoic


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

Central Mine, in secs. 24, 25, and 36, T. 58 N., R. 31 W., Keweenaw Co., northern MI (Upper Peninsula) (Lane and Seaman, 1907).


AAPG geologic province:

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 ([ ]).