Usage:
Prairie Farm Member of River Falls Formation (WI)
Geologic age:
Quaternary (Pleistocene)
Type section, locality, area and/or origin of name:
Type section: roadcut on south side of an east-west road, in NE/4 NW/4 SE/4 sec. 13, T. 32 N., R. 13 W., [approx. Lat. 45 deg. 15 min. 32 sec. N., Long. 91 deg. 55 min. 05 sec. W.], Dority Creek 7.5-min quadrangle, Barron Co., northwestern WI (Attig and others, 1988; see Syverson and others, 2011).
Named from community of Prairie Farm, Barron Co., northwestern WI [a few mi southwest of type section]; name credited to Mark D. Johnson, 1984, Univ. Wisconsin PhD dissert. (Attig and others, 1988; see Syverson and others, 2011).
Reference sections (Attig and others, 1988; Syverson and others, 2011):
(1) till; in roadcut on north side of east-west road, in SW/4 SW/4 SW/4 sec. 19, T. 33 N., R. 12 W., [approx. Lat. 45 deg. 19 min. 23 sec. N., Long. 91 deg. 54 min. 36 sec. W.], Dority Creek 7.5-min quadrangle, Barron Co., northwestern WI; and
(2) sand; in pit, in SW/4 SW/4 SW/4 sec. 3, T. 31 N., R. 9 W., [approx. Lat. 45 deg. 12 min. 00 sec. N., Long. 91 deg. 30 min. 41 sec. W.], New Auburn 7.5-min quadrangle, Chippewa Co., western WI.
[Additional locality information from USGS historical topographic map collection TopoView, accessed on June 9, 2018.]
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 ([ ]).