Handbook of Paleontology 



317 



to what extent can not be determined. Thus we see that 

 during early Silurian the sea claimed only central and 

 western New York, but in the late Silurian practically all 

 the State south and west of the Adirondacks was under 

 water. A maximum of between 2600 and 3000 feet of 

 deposits was laid down in New York State in Silurian 

 times, the greatest thickness represented by shales and 

 sandstones. The classification of the New York forma- 

 tions follows, the dashes indicating missing beds in the 

 various sections. 



Western 

 Cayugan 



(Upper) 



Cobleskill dol. 



(Akron) 

 Salina beds 



Bertie w.l. 



Camillus sh. 



Syracuse salt 



Vernon sh. 



Pittsford sh. 



Niagaran 



(Middle) 

 Lockport dol. (incl. 



Guelph dol.) 

 Clinton beds 



Rochester sh. 



Irondequoit l.s. 



Reynales l.s. 



Maplewood sh. 

 Thorold s.s. 



Medinan 



(Lower) 

 Upper Medina beds 

 c Red sh. and s.s. 



< Whirlpool s.s. 

 Queenston sh. 



SILURIAN SYSTEM 





West Central 



Central 



Cayugan 



Cayugan 



(Upper) 



(Upper) 



Manlius l.s. 



Manlius l.s. 



Rondout w.l. 



Rondout w.l. 



Cobleskill dol. 



Cobleskill dol. 



(Akron) 





Salina beds 



Salina beds 



Bertie w.l. 



Bertie w.l. 



Camillus sh. 



Camillus sh. 



Syracuse salt 



Syracuse salt 



Vernon sh. 



Vernon sh. 



Pittsford sh. 



Pittsford sh. 



Niagaran 



Niagaran 



(Middle) 



(Middle) 



Lockport dol. (incl. 



Lockport dol. (incl. 



Guelph dol.) 



Guelph dol.) 



Clinton beds 



Clinton beds 



Rochester sh. 



Rochester sh. 



Irondequoit l.s. 



Shales 



Williamson sh. 



Williamson sh. 



(Wolcott ore) 





Wolcott l.s. 



Wolcott l.s. 



Sodus sh. 



Sodus sh. ? 



(Sterling Sta. ore) 





Bear Creek sh. 



Bear Creek sh. 



Reynales l.s. 



Reynales l.s. 



(Furnaceville ore) 

 Maplewood sh. 





Maplewood sh. 



Thorold s.s. 



Oneida cgl. 



Medinan 



Medinan 



(Lower) 



(Lower) 



Queenston sh. 





