Potsdam Beds, a name given in North America to the uppermost division of the Cambrian or Primordial strata.
Potsdam Beds
Chambers's Encyclopaedia, Volume 8: Peasant to Eoumelia, p. 359
Source scan(s): p. 0368
Potsdam Beds, a name given in North America to the uppermost division of the Cambrian or Primordial strata.