Am. Jour. Sci., Vol. XXXI, 



Plate VI. 



STJ3AXLGEAPHIC M.KS 



OF 



POTSDAM 



AND EELATED STEATA 



S.W. OF THE BilTINO 



POTTGHKEEPSIE, ff.Y. 

 Limestone of iineertain horizon, but either Potsdam., CaIci.fer.ous, or Trenton, 

 Potsdam mainly under drift.. ]===[ Potsdam, prominent outcrops. 

 Fassilifcrou.s Potsdam,. fiTTTi Hudson Hiver Group largely under drift 

 Hudson River Group, promin en t outcrops. Scale 1250 ft. to the inch. 



'■ Iiere; 6000 ft 



