Usage:
Oconee Coal Member of Mattoon Formation of Mcleansboro Group (IL)
Geologic age:
Late Pennsylvanian (Missourian)
Type section, locality, area and/or origin of name:
Type section: Exposure in a W-flowing tributary to Coal Creek, 4 mi N of the village of Oconee, SE/4 SE/4 SE/4 sec. 34, T. 11 N., R. 1 E., approximately 300 ft N of the County Line Road in Christian Co., IL (Nance and Treworgy, 1981).
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 ([ ]).