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NGMDB

Geologic Unit: Potsdam

Usage:

Potsdam Sandstone (NY*,VT)
Potsdam Sandstone of Beekmantown Group (NY)
Potsdam Sandstone of Saratoga Springs Group (NY)
Potsdam Formation (PA)
Potsdam Supergroup (IN-subsurface)


Subunits:

FORMATION STATUS (alphabetical) --all in NY: Ausable Member, Keeseville Member, and Nicholville Member*.
SUPERGROUP STATUS --all in IN: Mount Simon Sandstone, Munising Group.


Geologic age:

Cambrian, Late*
Ordovician, Early


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

Named from Potsdam, St. Lawrence Co., NY (Emmons, 1838).


AAPG geologic province:

Adirondack uplift*
New England province
Appalachian basin
Cincinnati arch


NGMDB

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 ([ ]).

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Page Last Modified: Tue Jun 3 16:25:13 2014