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National Geologic Map Database

Geologic Unit: Point Pleasant

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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).