12 
Fig l. 
Epochs. 
Pliocene. 
Miocene. 
Eocene. 
„ „ ( Upper or White 
Upper Cretaceous, i Chalk. 
( Lower or Gray. 
Middlo Cretaceous (Up. Greon-sand). 
Lower Cretaceous (Low. Green sand). 
Woalden. 
npperOolito J Purbock, Portland and 
' ( Kimmoridgo Clay. 
Middle OoUteJ £ 0 ?'-;% 
I Oxford Clay. 
Lower Oolite J ? t 2" e . 8flo J, d -, Ii 
I Inferior Oolite. 
Upper Lias. 
Marlstone. 
Lower Lias, 
g Keuper. 
Muschelkalk. 
Bunter-saudstein. 
a 
B 
O f (J 
c 
Carbonif- 
erous. 
Devonian. 
Silurian. 
