o 



H 

 < 

 § 



1 

 to' 



Msestrichtian (Danian), Faxo 

 chalk, Calcaire pisolitique. 



Senonian (White Chalk). 



Turonian (Chalk marl and 

 chloritic marl), Hippuritic 

 limestone. 



""Cenomanian (Upper Green- 

 sand). 



Gault, — Albian, Aptian, Ur- 

 gonian. 



Neocomian (Lower Green- 

 sand), Upper Neocomian 

 of d'Orbigny. 



Wealden. — Weald Clay, Has- 

 tings Sands, Pan fie Id 

 series, L. Neocomian of 

 d'Orbigny. 



V > V 



CO 



O 





Cretaceous. 



(Upper.) 



(Middle.) 

 (Lower.) 





•Bxxn'^xv'j 



■ Sn 090^:^9 J Q 



i 



CO 

 O 



1 



m 



o 



S J 

 .2 f> 



c3 O 



Cretaceous. 

 (Green sand of 

 New Jersey.) 



CO 



g 



o 



it Lignite. 



tern U. S. \E astern U, S, 



lills Group. Ripley. 



"Ft. Pierre. Rotten 



Limestone. 

 Niobrara. 



^ Ft. Benton 



a Group. Eutaw. 



c<r 



■ Westerr 

 Laramie or Grej 

 Port Union. 

 Judith River. 



CO HH O 



g X -dnojo -^ 



