134 



GEOLOGY OF THE ISLE OF WIGHT. 



The distance com- 

 prised in the section is 

 between four and five 

 miles ; Slumklin Down 

 forms the western, and 

 Bembridge Down the 

 eastern limit. On the 

 eastern side of the bay 

 the flinty chalk has a 

 total thickness of about 

 200 feet ; the lower chalk 

 and chalk marl, 200 feet ; 

 the firestone 100 feet; 

 and the gait 50 feet. 

 The greensand beds that 

 follow, correspond with 

 those of Atherfield cliffs, 

 which we shall here- 

 after visit, and contain 

 similar fossils; the low- 

 ermost bed abounding 

 in that remarkable and 

 characteristic shell, the 

 Perm Mulleti (PL IV. 

 fig. 6). The Wealden 

 deposits occupy the mid- 

 dle of the bay ; and on 



