Usage:
Sanders Group (IN*,KY)
Subunits:
Ramp Creek Formation (IN), Muldraugh Formation (IN,KY), Harrodsburg Limestone (IN*,KY), Salem Limestone (IN*,KY).
Geologic age:
Mississippian, Early*
Osagean
Mississippian, Late*
Meramecian
Valmeyeran*
Type section, locality, area and/or origin of name:
Vicinity of Sanders, Monroe Co., IN. Town is in SW/4 sec. 34, T. 8 N., R. 1 W. Present continuously along outcrop belt which extends from south tip of Harrison Co. along Ohio River, 123 mi south of Indianapolis northward to within 3 or 4 mi of common intersection of Fountain, Montgomery, and Parke Cos., about 60 mi north-northwest of Indianapolis (Smith, 1965).
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 ([ ]).