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National Geologic Map Database

Geologic Unit: Copper Falls

Usage:

Copper Falls Formation (MI,WI)


Subunits:

(alphabetical) --all in WI: Bakerville Member, Crab Lake Member, Merrill Member, Mikana Member, Nashville Member, Pokegama Creek Member, Poskin Member, Sunrise Member, Sylvan Lake Member, Wildcat Lake Member.


Geologic age:

Quaternary (Pleistocene)


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

Type section: cutbank on west side of Bad River, 0.5 mi (0.8 km) northwest of Copper Falls, Copper Falls State Park, in SW/4 SE/4 NW/4 sec. 17, T. 45 N., R. 2 W., [approx. Lat. 46 deg. 22 min. 44 sec. N., Long. 90 deg. 38 min. 48 sec. W.], southeastern corner High Bridge 7.5-min quadrangle, Ashland Co., northern WI (Mickelson and others, 1984; Syverson and others, 2011).
Named from Copper Falls State Park; name credited to Lee Clayton (Mickelson and others, 1984; Syverson and others, 2011).
Reference section: [about 0.5 mi north of type section] in cutbank on west side of Bad River, 0.8 mi (1.3 km) northwest of Copper Falls, Copper Falls State Park, in SW/4 NE/4 SW/4 sec. 8, T. 45 N., R. 2 W., [approx. Lat. 46 deg. 23 min. 27 sec. N., Long. 90 deg. 38 min. 52 sec. W.], southeastern corner High Bridge 7.5-min quadrangle, Ashland Co., northern WI (Mickelson and others, 1984; Syverson and others, 2011).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).