88 



A CENTURY OF SCIENCE 



Tertiary system j 



Upper Secondary 

 system 



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

 according to W. W. Mather 1842. 



f Alluvial division. 

 Quaternary system < Quaternary division. 



L Drift division. 



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. "1 XT -o -, 



The Palisades New Bed system 



Eed Sandstone f of Emmons and 



division. J HalL 



Coal system of Mather, and Carboniferous system of Hall. 

 Old Bed 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. 



f Chemung, Portage or Nunda (divided 



Erie division }? to Cashaqua, Gardeau, Portage), 



[Devonian] Genesee Tully, Hamilton (divided 



into Ludlowville, Encrmal, Moscow), 

 t and Marcellus. 



f Corniferous, Onondaga, Schoharie, Cau- 

 J da-galli, Oriskany, Upper Pentame- 

 I rus, Encrinal, Delthyris, Pentamerus, 

 L Waterlime, Onondaga salt group. 



j Niagara, Clinton, and Medina. 



f Oneida or Shawangunk, Grey sandstone, 

 Hudson Biver group, Utica, Trenton, 

 < Black Biver including Birdseye and 

 Chazy, Calciferous sandrock, and 

 Potsdam. 



Helderberg series 

 [Devonian- 

 Silurian] 



Ontario division 

 [Silurian] 



Champlain division 

 [ Silurian-Ordovi- 

 cian-Upper 

 Cambrian] 



According to Emmons 1842, Mather 1843, Vanuxem 1842, 



Hall 1843. 





Gl *anular quartz Stockbridge limestone, 

 Lower Cambrian] Magnesian slate, and Taconic slate. 



Primary or Hypo- 

 gene system 



Metamorphic and Primary rocks. 



