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National Geologic Map Database

Geologic Unit: Sample

Usage:

Sample Sandstone (IN*, KY*, IL)
Sample Sandstone of West Baden Group (IN)
Sample Formation of West Baden Group (IN)
Sample Sandstone Member of Ridenhower Formation (IL)


Geologic age:

Middle Mississippian (Visean; early Chesterian)*


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

Strong development and good exposures 1 mi east of Sample Station in Brechinridge Co., KY on the Louisville, Henderson, and St. Louis RR (Butts, 1917).


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 ([ ]).