Potsdam, 



Trenton. 



Hudson River. 

 Oneida. 

 [.. Niagara. 



I 



g 



L. Helderberg, 

 Oriskany. 



Corniferous. 



I, Chemung. 



Garb. Conglomerata. 



(Carboniferous 

 (.Limestone. 



Coal Formation. 

 Permian Conglomerata. 



Magnesian Limestone. 



