Usage:
Onondaga Formation (VA,PA*)
Onondaga Limestone (PA*,NY*,NJ*,MD*,VA*,WV*)
Onondaga Group (PA,OH,WV)
Subunits:
(alphabetical): Babcock Hill (NY), Buttermilk Falls (PA), Clarence (PA,NY*), Edgecliff (PA,NY*), Moorehouse (PA,NY*), Nedrow (PA,NY*), Selinsgrove Limestone (PA), Seneca (NY*), and Springfield Center (NY) Members of Onondaga Limestone or Formation; Clarence Chert (PA), Columbus Limestone (OH,PA,WV), Delaware Limestone, Edgecliff Limestone (PA), Moorehouse Limestone (PA) Needmore Shale (PA), Newton Hamilton Formation (PA), and Selinsgrove Limestone (PA) of Onondaga Group
Geologic age:
Middle Devonian*
Type section, locality, area and/or origin of name:
Type area: Onondaga Co., NY (Hall, 1839).
AAPG geologic province:
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 ([ ]).