Geologic Unit: Onondaga
Onondaga Formation (VA,PA*)
Onondaga Limestone (PA*,NY*,NJ*,MD*,VA*,WV*)
Onondaga Group (PA,OH,WV)
Type area: Onondaga Co., NY (Hall, 1839).
(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
Unit Name History:
Named (Hall, 1839).
Revised to group (Willard, 1939).
Extended into NJ (Miller, 1974).
Revised (Conkin, 1987).
Revised; Overview (Brett and Ver Straeten, 1994).
Overview (Drake and others, in press).
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Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.
"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().
Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).
U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013