Usage:
Berry Clay Member of Glasford Formation (IL,WI)
Berry Clay Member of Pearl Formation (IL)
Geologic age:
Quaternary (Pleistocene; Illinoian)
Type section, locality, area and/or origin of name:
Type section: Rochester section, roadcut exposure [on Cardinal Hill Road, about 3+ mi south of Rochester and 4+ mi west of Berry], in NW/4 SE/4 NW/4 sec. 34, T. 15 N., R. 4 W., [New City 7.5-min quadrangle], Sangamon Co., central IL. Named from Berry, [east side of Highway 29, bdry. btw. secs. 30 and 31, T. 15 N., R. 3 W., Edinburg 7.5-min quadrangle, Sangamon Co., central IL] (Willman and Frye, 1970, p. 188, table 6).
[Additional locality information from USGS GNIS database and USGS historical topographic map collection TopoView; accessed on June 9, 2018.]
AAPG geologic province:
Illinois basin
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 ([ ]).