56 



THE DEVONIAN AND CARBONIFEROUS. 



[BULL. 80. 



CLASSIFICATION BY EMMONS. 1842. 



f Final Report, Second District, p. 429.] 



Tabular view of the sedimentary rocks of New York. 



Taconic system. 



Champlaiu group 



New York sysjtem. < 



Ontario group 



Holder berg series 



Erie group 



Old Red system 

 New Red system 

 Tertiary 



-Taconic slate, Magnesian slate, Stockbridge 

 limestone, Granular quartz. 



-Potsdam sandstone, Calciferous sandrock, 

 Chazy and Birdseye limestone, marble 

 of Isle La Motte, Trenton limestone, 

 Utica slate, Lorraine sbales, Gray sand- 

 stone, Conglomerate. 



.Medina sandstone, Green sbales and Ooli- 

 tic iron ore, Niagara limestone, Red 

 sbale, Onondaga salt and plaster rocks, 

 Manlius water-lime. 



.Pentamerus limestone, Delthyris sbaly 

 limestone, Oriskany sandstone, Encrinal 

 limestone, Cauda-Galli grit, Scbobarie 

 grit, Helderberg limestone. 



.Marcellus and Hamilton sbales, Tully lime- 

 stone, Genesee slate, Itbaca and Che- 

 mung sbales and grits. 



.Old Red sandstone, witb its beds of Con- 

 glomerate and its greenish shales of the 

 Catskill Mountains. 



.New Red sandstone associated witb vol- 

 canic rocks and greenstone trap of the 

 Palisades. 



.Blue and yellowish clays of Champlaiu and 

 white and yellowish sand. 



1. Primary system. 



2. Taconic system. 



3. New York system < 



4. Quaternary system. 



CLASSIFICATION BY VANUXEM. 1842. 



[Final Report on the Third District, p. 13. ] 

 Classification of roclcs of New York State. 



Champlaiu division Potsdam sandstone, Calcifer- 

 ous group, Black River 

 limestone, Trenton lime- 

 stone, Utica slate, Hudson 

 River group. 



Ontario division Gray sandstone, Mediua sand- 

 stone, Oneida Conglomer- 

 ate, Clinton group, Niagara 

 group. 



Helderberg division Onondaga salt group, Water- 

 lime group, Pentamerus 

 limestone, Catskill shaly 

 limestone, Oriskany sand- 

 stone, Cauda - Galli grit, 

 Schoharie grit, Onondaga 

 limestone, Comiferous lime- 

 stone. 



Erie division Marcellus shale, Hamilton 



group, Tully limestone, 

 Genesee si ate, Portage 

 group, Ithaca group, Che- 

 mung group. 

 .Catskill group. 



