Adams.] 



The Upper Cretaceous. 



25 



Williston, 

 1897. 





5 



5: 



o 

 o 



o 



W 



en 



•II s-i-s ■ 



Ph HH t— < 



Pteranodon. pn 

 Niobrara. 



1*1 CO 



CD rf 



a-a 



—1 CO 



PQ 



Benton. 





Logan, 

 1897. 



3 ii 



'S 



c 

 o 

 o 



K 



Pteranodon. 

 Fort Hays. 



Blue Hill 



shales. 

 Ostrea 

 > shales. 

 Fence-post. 

 Inoceramus. 

 Flag. 

 Lincoln 



marble. 

 Bituminous. 



a .a' 

 SB-. 



© rf <X> 

 & ctf"i 



OcoJ 



Upper. Lower. 

 Benton. 



Salifer- Ferru- 



ous. ginous 



Dakota. 



Niobrara. 



Cragin, 

 1896. 



CO .2 



9 « 



O CD 



j. ~ 



H s _ 



If 11 a§ 



-v~Z h N o 



Smoky Hill chalk. 6 



Niobrara. 



[ Victoria clay 

 -j with 

 j Cannon-ball 

 td > zone. 

 a 1 Russell 

 o formation, 

 p j containing 

 Downs or 

 Fence-post 

 1 limestone. 



Dakota. 



Williston, 

 1893. 





_5 

 3: 







o 



CD 



K 



Fort Hays 

 limestone. 





Dakota. 



Niobrara. Benton. 



Hay, 

 1888. 



5 -£ 



*= a 



Norton couaty 



bods 



of doubtful 



reference. 



CD 



a 





 CO 



CD 



a 

 3 



Shale 

 with 

 concre- 

 tions. 



1 



r 



L 



Dakota. 



Niobrara. | Benton. 



St. John, 

 1882. 



— - 



- :- 

 PS* 



1g 



o'-§ 



- 





Dakota. 



K* 





Niobrara. Benton. 



Mudge, 

 1882. 



.2 a 



It 







Dakota. 



CD g 



w ^ Niobrara. 



Benton. 



Mudge, 

 1876. 



«* 



~E ^ 



*? a 



5 t: 



Nio 

 brara 



proper. 



43 CO 



Dakota. 





' 





Niobrara. 



a 







cb'O 



5?a 



Z. CD 



Pm co 



CD^ 

 C CD 



cvg 



P3£ 



mT3 



a* 3 

 cd a 





BO 



o 

 &4 



S-l 



Si . 



o 



ft 



OS 



'- . 

 oj (TO 



■s ° 



■Sfc 

 S3 



O C^ 



a © 

 PQ ^ 



o! - 

 +J r-t 

 O . 



M o 

 o3 te! 



3— iv 



