Usage:
Warsaw Formation (IL*,IA,KY*,MO*)
Warsaw Limestone (CO*,IL*,IA*,KS*,KY*,MO*,TN*)
Warsaw Shale (IL*,MO*)
Warsaw Formation of Mammoth Cave Group (IL-notably southwestern part)
Also called /Salem-Warsaw Formation (KY).
[The use of a hyphen between undifferentiated formations is not considered proper notation (CSN, 1933).]
Subunits:
(alphabetical): Garrett Mill Sandstone Member (KY*,TN*), Science Hill Sandstone Member (KY*).
Geologic age:
Middle Mississippian (Visean; late Osagean to Meramecian)*
Type section, locality, area and/or origin of name:
Type section: exposure in Geode Glen at Warsaw, in NW/4 NW/4 sec. 10, T. 4 N., R. 9 W., Hancock Co., western IL (Collinson, 1964, IL Geol. Survey Guidebook 6, as cited in Willman and others, 1975).
Reference sections in St. Louis Co., eastern MO: (1) in a series of roadcuts on MO Highway 141, in center N/2 sec. 14, T. 43 N., R. 5 E.; (2) in roadcuts at junctions of U.S. Interstate Highways I-44 and I-270, a few miles north of the first series of roadcuts; and (3) along west-facing bluffs of Meramec River Valley, immediately north of I-44 bridge over Meramec River (Thompson, 1986).
Named from town of Warsaw, Hancock Co., western IL (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Anadarko basin*
Cincinnati arch*
Illinois basin*
Iowa shelf*
Ozark uplift*
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 ([ ]).