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National Geologic Map Database

Geologic Unit: Bisher

Usage:

Bisher Formation (OH)
Bisher Limestone (OH*,KY*)
Bisher Dolomite (KY*)


Geologic age:

Silurian (Llandovery to Ludlow)*


Type section, locality, area and/or origin of name:

Typically exposed northeast of Bisher Dam [about 1 mi south of Hillsboro, Highland Co., southwestern OH] (Foerste, 1917).


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 ([ ]).