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National Geologic Map Database

Geologic Unit: Lexington

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 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 ([ ]).