88 



A CENTUEY OF SCIENCE 



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

 according to W. W. Mather 1842. 



C Alluvial division. 



Quaternary system -< Quaternary division. 

 Drift division. 



Tertiary system 



Upper Secondary 

 system 



These strata are included in the next 

 lower division. 



Long Island division. Equals the Ter- 

 tiary and Cretaceous marls, sands, 

 and clays of the coastal plain of New 

 Jersey. 



Trappean division. 

 The Palisades 



Red Sandstone 



division. 



New Eed system 

 of Emmons and 

 Hall. 



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 Vanuxem. 



According to Hall 1843, and essentially Vanuxem 1842. 



C Chemung, Portage or Nunda (divided 

 into Cashaqua, Gardeau, Portage), 



rn -\ Genesee, Tully, Hamilton (divided 



into Ludlowville, Encrinal, Moscow), 

 [_ and Marcellus. 



Erie division 



Helderberg series 

 [Devonian- 

 Silurian] 



Ontario division 

 [Silurian] 



Champlain division 

 [ Silurian-Ordovi- 

 cian-Upper 

 Cambrian] 



C Corniferous, Onondaga, Schoharie, Cau- 

 J da-galli, Oriskany, Upper Pentame- 

 1 rus, Encrinal, Delthyris, Pentamerus, 



t. "Waterlime, Onondaga salt group. 



] Niagara, Clinton, and Medina. 



C Oneida or Shawangunk, Grey sandstone, 



Hudson River group, Utica, Trenton, 



< Black River including Birdseye and 



Chazy, Calciferous sandrock, and 



1 Potsdam. 



According to Emmons 1842, Mather 1843, Vanuxem 1842, 



Hall 1843. 



Taconic system 

 [Ordovician and 

 Lower Cambrian] 



Primary or Hypo- 

 gene system 



Granular quartz, Stockbridge limestone, 

 Magnesian slate, and Taconic slate. 



Metamorphic and Primary rocks. 



