Department of Environmental Conservation

D E C banner

Wiscoy Falls and Wiscoy Formation

Wiscoy Falls - Climbing ripples (also festoon ripples) in the Wiscoy Formation

Wiscoy Falls - Wiscoy Formation
Located in Allegany County

Image courtesy of Gerald Smith

Type: Creek side.

Features: Numerous sedimentary structures including: grooves, striations, load casts,
climbing ripples, calcareous concretions and Cruziana and Skolithos ichnofacies.

Feature Type: Type Section.

Reference: NYS Geological Association Field Trip Guidebook, 71st Annual Meeting 1999;
Structure and Upper Devonian Stratigraphy in the Appalachian Plateau of Allegany County,
New York State, Including the Clarendon-Linden Fault System.
For online reference please visit -

Quadrangle: Portageville.

Reason for Designation: The Wiscoy Formation marks the top of the West Falls Group & this locality
contains the contact between the Wiscoy/Dunkirk formations West Falls/Canadaway groups that coincides
with the Frasnian/Famennian boundary & the mass extinction event that occurs at that boundary. The large,
well exposed surfaces are excellent for studying many different aspects of the depositional environment of the
Late Devonian up to the 5th largest mass-extinction in Earth's history.