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National Geologic Map Database

Geologic Unit: Genesee

Usage:

Genesee Formation (MD*,NY*,OH*,PA*,WV*)
Genesee Group (NY,PA)
Genesee Shale (VA)


Subunits:

GROUP STATUS: Geneseo Shale (NY), North Evans Limestone (NY), Penn Yan Shale (NY), Ithaca Formation (NY), Genundewa Limestone (NY), West River Shale (NY), Sherburne Formation/Siltstone (NY).
FORMATION STATUS: Geneseo Shale Member (MD*,NY*,PA*,WV*), North Evans Limestone Member (NY), Penn Yan Shale Member (NY*)/Tongue (NY), Ithaca Member (NY*), Genundewa Limestone Member (NY*), West River Shale Member (NY*,WV), Sherburne Member (NY*), Renwick Shale Member (MD*,NY*,WV*,PA*)


Geologic age:

Devonian, Middle*
Devonian, Late*


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

Named from abundant exposures along Genesee River and Valley, NY, especially in gorge of River below Portage (Vanuxem, 1942). Reference section: At Beards Creek, near Leicester, western Livingston Co. (deWitt and Colton, 1959).


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 ([ ]).