Usage:
Tar Springs Formation (IL*,IN*,KY*,MO*)
Tar Springs Formation of Buffalo Wallow Group (IN)
Tar Springs Sandstone (IL*,IN*,KY*,MO*)
Tar Springs Sandstone of Pope Group (IL)
Tar Springs Sandstone Member of Leitchfield Formation (KY*)
Subunits:
Tick Ridge Sandstone Member (IN).
Geologic age:
Middle Mississippian (Visean; Chesterian)*
Type section, locality, area and/or origin of name:
Named from Tar Springs, 3 mi south of Cloverport, Brechinridge Co., KY (Owen, 1857).
AAPG geologic province:
Illinois basin*
Ozark uplift*
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 ([ ]).