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National Geologic Map Database

Geologic Unit: Folsomville

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 ([ ]).