ARCHAEAN 



TRENTON LIMESTONES 



HUDSON RIVER AND UTICA BEDS 



MEDINA SANDSTONE 



CLINTON FORMATION 



NIAGARA FOR MAT I ON 



SALINA FORMATION, 



HELDERBERG LIMESTONE 



O R IS KAN Y SANDSTONE 



ONONDAGA LIMESTONE 



MARCELLUS SHALES 



HAMILTON SHALES 



ijk t j TULLV LIMESTONE 



GENESEE SHALES 



PORTAGE FORMATION 



CHEMUNG FORMATION 



CATSKII-L FORMATION. 



H WAVERLY FORMATION 



• WEILS IN WHICH ROCRSALI HAS HE. t N FOUND 



■ SALT MINES 



