Usage:
Pennington Formation (AL*,KY*,TN*,VA*)
Pennington Group (KY,VA*,WV)
Pennington Shale (AL*,GA*,KY*,TN*,VA*)
Subunits:
GROUP STATUS (alphabetical): Bluefield Formation (KY), Bluestone Formation (KY,VA*), Hinton Formation (KY,VA*), Princeton Sandstone (KY,VA*,WV).
FORMATION STATUS (alphabetical): Little Stone Gap Member (KY*), Pinnacle Overlook Member (KY), Stony Gap Sandstone Member (KY*,VA).
Geologic age:
Middle Mississippian to Early Pennsylvanian*
Type section, locality, area and/or origin of name:
Pennington Gap, Lee County, VA (Campbell, 1893).
AAPG geologic province:
Appalachian 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 ([ ]).