U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Menard

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).