Usage:
Cohn Coal Member of Mattoon Formation of Mcleansboro Group (IL,IN)
Geologic age:
Late Pennsylvanian (Missourian)
Type section, locality, area and/or origin of name:
Type locality: on south side of Big Creek, in NE/4 sec. 1, T. 11 N., R. 12 W., Marshall 15-min quadrangle, Clark Co., eastern IL. Exposure is about 2.5 mi northwest of Cohn, now called Livingston (Kosanke and others, 1960; coal named by Newton and Weller (1937, Illinois Geol. Survey Rpt. Inv., no. 45, p. 18; see also Willman and others, 1975).
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 ([ ]).