Usage:
Lexington Limestone (IN*,KY*,OH*)
Lexington Formation (IN?,OH)
Subunits:
(alphabetical): Brannon Member (KY*), Curdsville Limestone Member (IN,KY*,OH) or Curdsville Member (IN,KY*,OH), Devils Hollow Member (KY*), Greendale Lentil (KY*), Grier Limestone Member (KY*,OH) or Grier Member (KY*), Logana Member (KY*,OH), Millersburg Member (KY*), Perryville Limestone Member or Perryville Member (KY*), Point Pleasant Member (IN,OH), Stamping Ground Member (KY*), Strodes Creek Member (KY*), Sulphur Well Member (KY*), Tanglewood Limestone Member (KY*) or Tanglewood Member (KY*), Westboro K-bentonite zone (informal) (KY,OH).
Geologic age:
Late Ordovician (Mohawkian to Cincinnatian; Chatfieldian to Edenian)*
Type section, locality, area and/or origin of name:
Type area: Lexington, Fayette Co., central KY (Campbell, 1898).
AAPG geologic province:
Cincinnati arch*
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 ([ ]).