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National Geologic Map Database

Geologic Unit: Coeymans

Usage:

Coeymans Formation of Helderberg Group (NJ*,NY*,PA*)
Coeymans Limestone of Helderberg Group (NJ*,NY*,PA*,VA*,WV*)
Coeymans Limestone Member of Helderberg Formation (MD,PA*)
Coeymans Member of Helderberg Limestone (PA*,VA)


Subunits:

(alphabetical): Dayville Member (NY)*, Deansboro Member (NY*), Depue Limestone Member (PA*,NJ*), Elbow Ridge Sandstone Member (PA), Kalkberg Member (NY), Peters Valley Member (PA*,NY*,NJ*), Ravena Member (NY), Shawnee Island Member (NJ*,PA*), Stormville Member (NJ*,PA*).


Geologic age:

early Early Devonian (Lochkovian)*


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

Exposed at Coeymans, Albany Co., NY (Clarke and Schuchert, 1899).


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 ([ ]).