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
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).