Usage:
Folsomville Member of Petersburg Formation (IN*)
Geologic age:
Middle Pennsylvanian (Desmoinesian)*
Type section, locality, area and/or origin of name:
Type section and reference section: final cuts in former surface mines near Folsomville, in SW/4 SE/4 sec. 7, T. 5 S., R. 7 W., and in NW/4 SW/4 sec. 12, T. 5 S., R. 8 W., northern Warrick Co., southwestern IN (Eggert, 1982; corrected by Shaver and others, 1986).
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 ([ ]).