lO NEW YORK STATE MUSEUM 



Summary of classification of the New York Devonic according to John M.Clarke 



DESCENDING ORDER 



Carbonic 



Group 



"" Pennsylvanian 



lississippian 



Stage 



Olean conglomerate 

 Knapp beds 

 Oswayo beds 



( Panama conglomerate) 

 Cattaraugus beds 



incl. Wolf Creek con- 

 glomerate 



Devonic 



u I Chautauquan 



li 



a; I 

 Z I Senecan 



Erian 



Ulsterian 



Oriskanian 



I Chemung beds 



(Catskill sandstone, local 

 ( facies) 



Portage beds 



( Naples, Ithaca, Oneonta, 



Sherburne beds, local 



facies) 

 Genesee shale 

 Tully limestone 



f Moscow shale I 

 I Ludlowville shale 

 ^ Skaneateles shale j 

 I Cardiff shale 

 I Marcellus shale 



j Onondaga limestone 

 ( Schoharie grit 



\ Esopus grit 

 '( Oriskany beds 



Hamil- 

 ton 



f Port Ewen limestone 

 Tj , , I . ! Becraft limestone 



^ ) New Scotland beds 



[ Coeymans limestone 



