﻿ks Head marl. 



Tortonian. 



Helvetian. 



River marl 

 mber. 



Grove sand 

 mDer. 

 la marl mem- 



Burdiealian. 



rapa formation. 



Aquitanian. 

 Chattian. 



Rupelian. 



■am calcareous 



larl. 



•lanna limestone. 



1 Bluff clay. 



Lattorfian 

 (Sannoisian). 



ala limestone. 



sport sand, 

 bon formation, 

 llahatta b u h r ■ 

 tone. 



tchetigbee forma- 



ion. 



shi formation. 



scahoma forma- 



ion. 



nafalia formation. 



Ludian (Pria- 



bonian). 

 Bartonian. 



Aiiversian.e 

 Lutetian. 



Ypresian.' 



Sparnacian.« 



heola formation. Thanetian.c 



carnocliee clay. 1 



lyton limestone, i Montian.c 



red to the upper Eocene and placed 



