Outcrop exposures of the Potsdam Sandstone occur throughout the Saint Lawrence lowlands , western Lake Champlain Valley , and northern Mohawk Valley .
In New York state , the Potsdam is found primarily north and west of the Adirondack Mountains .
Outcrop exposures of the Potsdam   occur throughout the Saint Lawrence lowlands , western Lake Champlain Valley , and northern Mohawk Valley .
In New York state , the Potsdam is found primarily north and west of the Adirondack Mountains .