Usage:
Caseyville Formation (KY*)
Caseyville Formation of McCormick Group (IL*)
Caseyville Formation of Morrow Supergroup (IA)
Subunits:
(alphabetical): Battery Rock Sandstone Member (IL*,KY*), Bee Spring Sandstone Member (KY), Drury Member (IL), Gentry Coal Member (IL), Kyrock Sandstone Member (KY), Lusk Member (KY*) or Lusch Shale Member (IL*), Pounds Sandstone Member (IL*,KY*), Sellers Limestone Member (IL), Wayside Member (IL), Wildcat Den Coal Member (IA), Wyoming Hill Coal Member (IA).
Geologic age:
Early Pennsylvanian (Morrowan)*
Type section, locality, area and/or origin of name:
Type area: measured from outcrops on IL shore of Ohio River, btw. mouth of Saline River and Gentrys Landing below Battery Rock, in T. 11 S., R. 10 E., Shawneetown quadrangle, Hardin Co., southeastern IL (Lee, 1916; Kosanke, 1960).
Named from Caseyville, Union Co., KY (US geologic names lexicon, USGS Bull. 896; see also Lee, 1916).
Supplementary [Reference] section: exposures along Illinois Central RR, beginning over the RR tunnel near Zion Church, in NW/4 SW/4 SE/4 sec. 31, T. 11 S., R. 5 E., Harrisburg 15-min quadrangle, southward to Mississippian-Pennsylvanian contact about 1.5 mi north of Robbs, in NE/4 SE/4 NE/4 sec. 18, T. 12 S., R. 5 E., Brownfield 15-min quadrangle, Pope Co., southeastern IL (Kosanke, 1960).
AAPG geologic province:
Illinois basin*
Iowa shelf
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 ([ ]).