Usage:
Raccoon Creek Group (IL*,IN*,KY*)
Subunits:
(alphabetical): Brazil Formation (IN*), Caseyville Formation (IL*,KY*), Mansfield Formation (IN*), Staunton Formation (IN*), Tradewater Formation (IL*,KY*).
Geologic age:
Early to Middle Pennsylvanian*
Type section, locality, area and/or origin of name:
Indiana geologists consider type locality [area] to be along Raccoon Creek, in T. 14 N., R. 5, 6, 7, and 8 W., and T. 15 N. R. 8 W., southern Parke Co., southwestern IN (Shaver and others, 1986).
Reference sections: (1) lower part (Mansfield Formation, subsurface), Indiana Geological Survey drillhole SDH-31, in NE/4 NE/4 sec. 3, T. 14 N., R. 7 W., and composite section of core from SDH-30 and SDH-174, in SE/4 SW/4 sec. 31, T. 15 N., R. 6 W; and (2) upper part (from top of Raccoon Creek down to upper part Mansfield Formation, subsurface), Indiana Geological Survey drillhole SDH-33 (Tri-State Comm. Corr. Penn. Sys. Illinois Basin, 2001).
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 ([ ]).