GEOLOGY OF ERIE COUNTY 



Carbonic System 



[ Chemung 



Devonic System 



Portage 



Genesee 



Beds 



Tully 



Horn 



Hamilton 

 Beds 



Marcellus 

 Beds 



Wicoy shale 

 Laona sandstone 

 Gardeau shale 

 Dunkirk shale 

 Hanover shale 

 Angola shale 

 Rhinestreet shale 

 Cashaqua shale 

 Middlesex shale 



West River shale 

 Genundewa limestone 

 Genesee shale 



Pyrite layer 



Moscow shale 

 Tichenor limestone 

 Ludlowville shale 

 Skaneateles shale 



Cardiff shale 

 Stafford limestone 

 Marcellus shale 



Onondaga Onondaga limestone 



Beds 



Sil 



uric 



System \ Salina Beds \ Bertie hmest ° [e 



Cobleskill limestone 

 Bertie limestoce 

 Camillus shale 



