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National Geologic Map Database

Geologic Unit: Elwren

Usage:

Elwren Formation of West Baden Group (IN)
Elwren Sandstone (KY)
Elwren Sandstone Member of Paint Creek Formation (KY)


Geologic age:

Middle Mississippian (Visean; early Chesterian)


Type section, locality, area and/or origin of name:

Vicinity of Elwren, western Monroe Co., IN. Excellent exposures in cuts of the Illinois Central Railway (Malott, 1919).


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