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National Geologic Map Database

Geologic Unit: Chemung

Usage:

Chemung Formation (MD*,NY*,PA*,VA*,WV*)
Chemung Group (NY,WV)


Geologic age:

early Late Devonian (Frasnian)*


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

Named from exposures in valley of Chemung River and in town of Chemung, Chemung Co., central NY. Well exposed at Chemung upper narrows, about 11 mi below Elmira (Hall, 1839).


AAPG geologic province:

Appalachian basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).