Usage:
Point Pleasant Limestone (OH*)
Point Pleasant Formation (KY*,OH*)
Point Pleasant Member of Lexington Limestone (IN)
Point Pleasant Tongue of Clays Ferry Formation (KY*-subsurface)
Point Pleasant Member of Cynthiana Formation (OH)
Subunits:
FORMATION STATUS: Bear Creek K-bentonite zone (informal) (KY?,OH), Bromley Shale Member (OH).
TONGUE STATUS: Bromley Shale Bed (KY*-subsurface).
Geologic age:
Late Ordovician (Mohawkian to Cincinnatian; Shermanian to Edenian)*
Type section, locality, area and/or origin of name:
Exposures at Point Pleasant, Clermont Co., OH, in Ohio River Valley (Orton, 1873).
AAPG geologic province:
Appalachian basin*
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 ([ ]).