TABLE OF GEOLOGICAL SYSTEMS 



These names, given by geologists to the various divisions of 

 rocks, as indicated by the fossils entombed in them, are arranged 

 in 'descending' order, the more recent formations above, the 

 more ancient below, as newer deposits necessarily lie over older 

 beds. 



CAIXOZOIC OR TERTIARY GROUP. 



Pleistocene. 

 Pliocene. 

 Miocene. 

 Eocene. 



MESOZOIC OR SECONDARY GROUP. 



( 'retaceous. 



Jurassic-. 



Triassic. 



PALAEOZOIC OR PRIMARY GROUP. 



Permian. 



Carboniferous. 



Devonian. 



Silurian. 

 Cambrian. 



