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National Geologic Map Database

Geologic Unit: Port Ewen

Usage:

Port Ewen Formation of Helderberg Group (NY*)
Port Ewen Limestone of Helderberg Group (NY*,PA*,VA,WV)
Port Ewen Shale of Helderberg Group (NJ*,NY,PA*)


Subunits:

(alphabetical) --all in NY: East Kingston Member, Lake Katrine Member.


Geologic age:

Early Devonian*


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

Named from exposures in vicinity of Port Ewen, Ulster Co., NY (Clarke, 1903).


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 ([ ]).