Usage:
Chapel Coal Member of Patoka Formation of McLeansboro Group (IL)
Geologic age:
Late Pennsylvanian (Missourian)*
Type section, locality, area and/or origin of name:
Type locality: in SW/4 sec. 3, T. 8 N., R. 5 E., Glasford quadrangle, Peoria Co., north-central IL. Named from Graham Chapel, about 2 mi north of type locality (Kosanke and others, 1960).
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 ([ ]).