200 



BULLETIN OF THE NEW YORK STATE MUSEUM 



Era. 



i 



Jges. 



Epochs, 



Rocks. 









 N 

 

 Z 

 lU 

 



>- 



DC 



en 

 O 



TERRACE. 



CHAMPLAIN. 



. * - • » 



GLACIAL 







Sands and Clays. 



Boulder Clays. 









 N 

 

 CO 



IJJ 









 N 

 

 UJ 

 J 

 < 

 d 



o^S 



•< CO 



I— ZD 

 UJ o 

 a= UJ 

 O o 



C/3 



< 



59 S 



z 

 < 



z 







> 



llJ 



Q 





TERTIARY. 



Sands and Clays. 



CRETACEOUS. 



Sands and Clays. 



T 



•*" 



V 9 « O « 



TRIASSIC. 



LOWER 

 CARBONIFEROUS. 



o * • «• • 



O 4 » 



to «tf ^ 



» u 



^ _^« • 



Shales, 



Sandstones, 



and 



Conglomerates. 



* • ^ '' • •J • « /• • ♦ • . 



«• • •(••a • • ' \ * * " • 



.1 *• "L.:u.;^ 



Sandstones, 



Shales, 



and 



Conglomerates. 



CATSKILL 



■«»»»., I . 



CHEMUNG. 



ONEONTA. 



UPPER 

 HELDERBERG. 



ORISKANY. 



B >• « « •• . 



. r«^\. 



^ • «• 



fl » . 



^T^T^'-T^':^ 





W Mill III «M.^41<*«4V 



Conglomerates, 



Shales, 



and 



Sandstones. 



Shales. 



and 



Sandstones. 



Sandstones 



and 



Shales. 



Shales 



and 



Sandstones. 



Shales 



and 



Sandstones. 



Limestones. 



Sandstones. 



