IV. Modern Age. 

 III. Tertiary Age. 



II. Secondary Age. 



I. Palaeozoic Age. 

 Metamorphic Rocks. 



TO 



Upper Tertiary Formation. 



Lower Tertiary " 



Cretaceous " 



Oolitic " 



Trias " 



Carboniferous " 



Devonian " 



Upper Silurian " 



Lower Silurian " 



TO 



