Usage:
Marathon Formation (WI)
Subunits:
Wausau, Medford, and Edgar Members (WI)
Geologic age:
Quaternary (Pleistocene)
Type section, locality, area and/or origin of name:
Type section: gravel pit on west side of Ryan Street, 1.5 mi (2.4 km) south of Highway 29, in SW/4 SW/4 NE/4 sec. 27, T. 28 N., R. 8 E., [approx. Lat. 44 deg. 52 min. 50 sec. N., Long. 89 deg. 32 min. 24 sec. W.], Wausau 15-min quadrangle, Marathon Co., central WI (Mickelson and others, 1984; Syverson and others, 2011).
Named from Marathon Co.; name credited to William N. Mode (Mickelson and others, 1984; Syverson and others, 2011).
Reference sections = type and reference sections of Edgar Member and reference section of Wausau Member (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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).