Usage:
West Franklin Limestone Member of Shelburn Formation of McLeansboro Group (IL*,IN*,KY*)
Geologic age:
latest Middle to earliest Late Pennsylvanian (latest Moscovian to earliest Kasimovian; latest Westphalian D to earliest Stephanian A; latest Desmoinesian to earliest Missourian)*
Type section, locality, area and/or origin of name:
Type locality: [exposures in bluff along Ohio River just east of village of West Franklin, approx. Lat. 37 deg. 53 min. 45 sec. N., Long. 87 deg. 42 min. 24 sec. W.], in SE/4 sec. 24, T. 7 S., R. 12 W., [West Franklin 7.5-min quadrangle], Posey Co., southwestern IN (see Rexroad and others, 2008; Brown and Rexroad, 2009).
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 ([ ]).