Usage:
Peddicord Tongue of Equality Formation of Mason Group (IL*-subsurface)
Geologic age:
Pleistocene (Wisconsinan Age)*
Type section, locality, area and/or origin of name:
Type section: Wedron section, at the silica sand pit of Wedron Silica Company in Wedron, in SE/4 SW/4 sec. 9, T. 34 N., R. 4 E., Fox River valley, La Salle Co., northeastern IL. Named from Peddicord School, 1 mi east (Willman and Frye, 1970; Willman and others, 1971).
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 ([ ]).