97 



A Column of the Silurian Rocks of the State of New 

 York, from E. Conrad's Report of 1841. 



TABLE III. 



1st 



or Upper Series. 





Known Fossils. 





'i 



Crustacea, 



\ 





Oneonta Group, 



Testacea, 



of Trilobites, 5 species. | 





Cazenovia Group, 



Bivalves, 



of Avicula, 3 " 





Tully Limestone, 





of Nuculites, 5 " I 







. 



of Cypricardia, 10 " 





Sherburne Group, 



Univalves, 



of Bellerophon, 1 '' ) 





Shales near Apulia, 



Radiaria, 



Euryale Annulatum, (De Kay,) 





Black Slate, 



Polyparia, 



none. S 





J 



Marine Plants, (none mentioned.) S 



2nd 



or Middle Series. 





Known Fossils. 





Onondaga Limestone, 



Crustacea, 



Trilobites, 15 species. 





Comiferous " 



Crinoidea, 







Grit Slate, (of Eaton,) 



Testacea, 







Fucoidal Sandstone, 



Bivalves, 



Strophomena, 6 " j 





Oriskany Sandstone, 





Delthyris or Spirifev, 5 " 

 Atrypa, 5 " J 





Crinoidal Sandstone, 



• 

 Univalves, 



Pentamerus, 1 " 





Limestone and Shale, 





14 " 







Radiaria, 



none. i 





Pentamerus Galeatus Limestone, 



Echinodermata, 













Hydraulic Limestone, 



Polyparia, 



Coralline, 10 " 





Gypseous Shale, 











Marine Plants, 





Rochester Shale, 





Fucoides, Caudagalli 1 " ( 



3d or Lower Series. 





Known Fossils. 



: 





Crustacea, 



J 



; 



Pentamerus OblongusLimestone, 



Testacea, 



Trilobites, 9 species. 





Iron Ore and Green Slate, 



Bivalves, 



Strophomena, 7 " 



; 



Red Sandstone, 





Orthis, 4 " 

 Pentamerus, 1 " 





Salmon River Shales, 



Univalves, 



Bellerophon, 2 " s 



| 



Trenton Limestone, 





Trachus, 1 " 

 Phragmolites, 1 " 



1 



Breccia, 



Radiaria, 



Cyrtolites, 1 '' | 



; 



Sparry Limestone, 



Crinoidea, 



1 " 



\ 



Calciferous Sandstone, 



Polyparia, 



3 " 



i 



Potsdam Sandstone, 





Coralline, 4 " 



; 





Marine Plants, \ 

 o u 



| 







Fuciodes Demissus. 



'/ 







" Harlani. 



\ 



J 





Dictuolites Beckii. 5 



13 



