Cretaceous and Older Rocks in East Kent. 



547 



quartz-veined rocks ringed round by Mesozoic formations. A little 

 consideration will now show that such a seeming absence of Mesozoic 

 debris need occasion no surprise. That the river must have flowed 

 over bare Palaeozoic rocks during by far the greater part of its course 

 is quite obvious, for this area of bare Palaeozoic extended (in 

 Wealden times) as far to the south-west as Walmestone and Deal, 

 and the river did not arrive at the neighbouring Mesozoic area until 

 it had attained its lower reaches. Nevertheless this apparent 

 absence of Mesozoic material from the Wealden sediments can be 



Srodmarsh 

 absenT 



Isojaaehyle -System 

 Wealden . EasC KenT . 



By H.A.BAKER,B.Sc,F.£.S. 



Fig. 2. 



only a seeming one. Mesozoic debris must be there, but its presence is 

 doubtless masked by the preponderance of the ancient quartzose rocks. 

 The river must have possessed greater velocity during the earlier 

 part of "Wealden times, in view of the steady movement of sub- 

 mergence which was taking place, and from the character of the 

 Blastings Beds in East Kent it can be seen that the abrading and 

 transporting power of the stream in this area must have been con- 

 siderable, only the coarser portion of its burden having been deposited 



