No current usage.
(†Oak Orchard Dolomite of Lockport Group (NY) or †Oak Orchard Member of Lockport Formation (NY) abandoned. Is considered same as Eramosa Dolomite. See Eramosa.)
Silurian
Outcrop along Oak Orchard Creek in western part of Orleans Co., western NY (Howell and Sanford, 1947).
Appalachian basin
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 ([ ]).