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National Geologic Map Database

Geologic Unit: Canajoharie

Usage:

Canajoharie Shale of Trenton Group (NY*-local)
Canajoharie Formation of Trenton Group (NY-local)
Recognized locally in Mohawk River Valley area. Rocks included in Utica Shale by some geologists. See also Utica.


Subunits:

(alphabetical) --all in NY: Chuctenunda Member, Fort Plain Member, Gansevoort Member, Minaville Member, Morphy Member, Sprakers Shale Member.


Geologic age:

Middle Ordovician*


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

Type section [composite?]: along Canajoharie Creek and along Flat Creek south of Sprakers, Montgomery Co., east-central NY (Kay, 1937).


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 ([ ]).