Usage:
Deer Plain Formation (IL*,MO*)
Geologic age:
Pleistocene*
Type section, locality, area and/or origin of name:
Named from exposures near village of Deer Plain, in sec. 16, T. 13 S., R. 1 W., Calhoun Co., IL. Deposits occur as a wide terrace in lowlands west of Illinois River and as small terrace remnants along Illinois and Mississippi Rivers; some terrace and deposits are well developed lowlands west of Mississippi River from Winfield to Old Monroe in Lincoln Co., MO (Rubey, 1952).
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 ([ ]).