TABULAR VIEW 



OF THE 



SEDIMENTARY ROCKS OF NEW-YORK. 



TACONIC SYSTEM,. . Taconic slate, Magnesian slate, Stockbridge limestone. Granular quartz. 



NEW-YORK SYSTEM,. 



Champlain Group,.- 



Ontario Group, . 



Helderberg Series,- 



Potsdam sandstone, Calciferous sandrock, 

 Chazy and Birdseyc limestone. Marble 

 of Isle La Motte, Trenton limestone, 

 Utica slate, Loraine shales, Grey sand- 

 stone, Conglomerate. 



Medina sandstone. Green shales and Ooli- 

 tic iron ore, Niagara limestone, Red 

 shale, Onondaga salt and plaster rocks, 

 Manlius water-lime. 



Pentamerus limestone, Delthyris shaly 

 limestone, Oriskany sandstone, Encrinal 

 limestone, Cauda-galli grit, Schoharie 

 grit, Helderberg limestone. 



Marcellus and Hamilton shales, TuUy 

 limestone, Genesee slate, Ithaca and 

 Chemung shales and grits. 



Erie Group, 



OLD RED SYSTEM,..^ 



NEW RED SYSTEM, 



TERTIARY, Blue and yellowish clays of Champlain, and white and yellowish sand 



Old Red sandstone, with its beds of conglomerate, and its greenish 

 shales of the Catskill mountains. 



New Red sandstone, associated with volcanic rocks or greenstone trap of 

 the Palisades. 



Geol. 2d DisT. 



55 



