Usage:
Menard Formation (IN)
Menard Limestone (IL*,IN,KY*)
Menard Limestone of Buffalo Wallow Group (IN-subsurface)
Menard Limestone of Pope Group (IL)
Menard Limestone Member of Buffalo Wallow Formation (KY*)
Subunits:
(alphabetical): Allard Limestone Member (IL), Scottsburg Limestone Member (IL,KY), Walche Limestone Member (IL,KY).
Geologic age:
Late Mississippian (Chesterian)*
Type section, locality, area and/or origin of name:
Menard, Randolph Co., IL, where it is well exposed southeast of the state hospital for the criminally insane (Weller, 1913).
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 ([ ]).