Usage:
Merrill Member of Copper Falls Formation (WI)
Geologic age:
Quaternary
Pleistocene, late
Wisconsinan, early
Type section, locality, area and/or origin of name:
Type section: Northwest corner of gravel pit north of Duginski Road, about 500 m west of the intersection of Duginski Road and old Highway 51, north of the town of Merrill, SE/4 SE/4 NW/4 sec. 1, T. 31 N., R. 6 E., Merrill 15-min quadrangle, Lincoln Co., WI (Mickelson and others, 1984).
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 ([ ]).