Charles Schuchert — Historical Geology, 1818-1918. 71 



The Geological Column of the New York Geologists of 1842-1843, 

 according to W. W. Mather 1842. 



f Alluvial division. 

 Quaternary system ■< Quaternary division. 



I Drift division. 



Tertiary system 



These strata are included in the next 

 lower division. 



Upper Secondary 

 system 



1 



Long Island division. Equals the Ter- 

 tiary and Cretaceous marls, sands, 

 and clays of the coastal plain of New 

 Jersey. 



New Red system 

 > of Emmons and 

 Hall. 



Trappean division 



The Palisades 

 Red Sandstone 

 division. 



Coal system of Mather, and Carboniferous system of Hall. 

 Old Red system of Catskill Mountains of Emmons; Catskill 

 division of Mather and Hall ; and Catskill group of Yanuxem. 



According to Hall 1843, and essentially Yanuxem 1842. 



" Chemung, Portage or Nunda (divided 

 into Cashaqua, Gardeau, Portage), 

 Genesee, Tully, Hamilton (divided 

 into Ludlowville, Encrinal, Moscow), 

 and Marcellus. 



Erie division 

 [ Devonian j 



Helderberg series 

 [Devonian- 

 Silurian] 



Ontario division 

 [Silurian] 



Champlain division 

 [ Silurian-Ordovi- 

 cian-Upper 

 Cambrian] 



Corniferous, Onondaga, Schoharie, Cau- 

 da-galli, Oriskany, Upper Pentame- 

 rus, Encrinal, Delthyris, Pentamerus, 

 Waterlime, Onondaga salt group. 



Niagara, Clinton, and Medina. 



Oneida or Shawangunk, Grey sandstone, 

 Hudson River group, Utica, Trenton, 

 Black River including Birdseye and 

 Chazy, Calciferous sandrock, and 

 Potsdam. 



According- to Emmons 1842, Mather 1843, Yanuxem 1842, 



Hall 1843. 



Taconic system 

 [Ordovician and 

 Lower Cambrian] 



Primary or Hypo- 

 gene system 



Granular quartz, Stockbridge limestone, 

 Magnesian slate, and Taconic slate. 



Met amorphic and Primary rocks. 



