USGS Visual Identifier
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Geologic Unit: Onondaga

Usage:
Onondaga Formation (VA,PA*)
Onondaga Limestone (PA*,NY*,NJ*,MD*,VA*,WV*)
Onondaga Group (PA,OH,WV)

Age:
Devonian, Early
Devonian, Middle*
Eifelian




Geologic Province:
Appalachian basin*






Areal Extent:
MD*
NJ*
NY*
OH
PA*
VA*
WV*

Type Locality:
Type area: Onondaga Co., NY (Hall, 1839).

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

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).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
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
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013