X. INTRODUCTION. 



rocks, constitute, with the overlying Silurian group, the 

 mountainous region of North Wales, Cumberland, and West- 

 moreland ; to these progressively foUow the beds belonging 

 to the Carboniferous, Oolitic, and Cretaceous groups, occu- 

 pying the central parts of England, and reposing on the 

 latter are the Tertiary series, the newest members of which 

 are found in Norfolk and Suffolk, on the eastern coast of 

 the island. 



For the convenience of arrangement, the Stratified 

 Fossiliferous Eocks have been divided into certain groups ; 

 each group being composed of many subordinate beds, 

 and characterized by a peculiarity or distinctness in their 

 Fauna or Flora from that which precedes or follows them. 

 The following scheme is a chronological arrangement of the 

 different members of this division in a descending order ; 

 as occurring in England. 



STKATIFIED FOSSILIFEROUS ROCKS. 

 Tertiaky Period. (Cainozoic Series, Fhillips.) 



Recent Group. J 



Superior Order. 

 (flonyleare^ 



Travertine, Peat. 



SheU, Marl, &c. 

 Pleistocene Group, j Marine beds. 

 (Erratic block period.) "[ Fresb-water beds. 



Pleiocene Group. 

 Miocene Group. 



Eocene Group. 



Mammaliferous Crag 



J Red Crag. 



[^ Coralline Crag. 



fFluvio-marine beds. 

 Bagsbot Sands. 

 London Clay. 

 Plastic Clay. 



