BUFFALO SOCIETY OF NATURAL SCIENCES 



The Devonic System in New York State with Special Reference to the Formations in 

 the Vicinity of Buffalo* 



FORMATIONS NEAR BUFFALO 



Chautauquan 



o 



Senecan 



/Chemung 



^ 



[Catskill = local facies] 



Portage 



Genesee 



TuUy 



Wiscoy shale 

 Laona sandstone 

 Gardeau shale 

 Dunkirk shale 

 Hanover shale 

 Angola shale 

 Rhinestreet shale 

 Cashaqua shale 

 Middlesex shale 



'West River shale 

 Genundewa limestone 



i (Styliola) 

 Conodont bed 

 Genesee shale 



Pyrite layer 



Erian 



Ulsterian 



Hamilton 



Marcellus 



r Onondaga 

 I Schoharie grit 



("Moscow shale 

 J Tichenor limestone 

 I LudlowviUe shale 

 [Skaneateles shale 



(Cardiff shale 

 Stafford limestone 

 MarceUus shale 



Onondaga limestone 



Oriskanian 



Helderbergian 



'Esopus grit 

 Oriskany beds 



"Port Ewen limestone 

 Becraft limestone 

 New Scotland beds 

 Coeymans limestone 



*The classification into groups and stages is that of Clarke aad Sctiuchert ("The nomencla- 

 ture of the New Yorlj. series of geological formations:" Science, n.s., x, S74-87S, iSgg), with some 

 modifications introduced later by Director J. M. Clarice in the bulletins and memoirs of the New 

 York State Museum. 



The formation, names are those used in a recent paper on the geology of Erie County by Fred- 

 erick Houghton (Bull. Buffalo Soc. Nat. Sci., xi, i-g2, 1914). 



