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National Geologic Map Database

Geologic Unit: West Falls

Usage:

West Falls Formation (KY*,NY*,OH*,PA*,TN*,VA*,WV*)
West Falls Group (NY,PA)


Subunits:

Angola Shale (NY*,WV), Nunda Sandstone (NY*), West Hill (NY*), Gardeau Shale (NY*), Grimes Siltstone (NY*), Hatch Shale (NY*), and Rhinestreet Shale (NY*,KY*, OH*,PA*,TN*,VA*,WV*) Members of West Falls Formation. Angola Shale (NY), Nunda Sandstone (NY,PA), West Hill Formation (NY), Gardeau Formation (NY,PA), Grimes Siltstone (NY), Rhinestreet Formation (NY,PA), Walton Formation (NY), Moreland Shale (NY), Millport Shale (NY), Beers Hill Formation (NY), Slide Mountain Formation (NY), and Honesdale Formation (NY) of West Falls Group.


Geologic age:

Late Devonian*


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

Along Cazenovia Creek in vicinity of West Falls and East Aurora, central Erie Co., NY.


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 ([ ]).