6d 



The horizontal range of the more important boulders is shewn 

 by Fig. II. Only a few are shewn, to prevent overcrowding 

 These few are intended rather to indicate the directions of boulder 

 dispersal than the number of each kind found. 



In the moraines and moraine-like mounds the boulders are 

 either angular or sub-angular. In the sand and gravel mounds 

 and in the Middle Sands and Gravels, they are angular, sub-angular, 

 and rounded. So are they in the Upper- and the Lower Boulder 

 Clays ; but the number of rounded boulders, which are often 

 severely glaciated, is much greater in the Lower- than in the 

 Upper clay ; and, as a rule, the boulders are larger in the Lower 

 than in the Upper clay, and there are more of them. Sometimes 

 a boulder of hard rock, rounded and glaciated, may be seen lying, 

 embedded in boulder clay, by the side of a piece of soft shale, 

 quite angular, and readily acted on by either pressure or the 

 atmosphere. 



The proportion of local- to far-travelled stones in the deposits 

 varies ; sometimes they are nearly equal in numbers, in other cases 

 the local rocks preponderate, particularly when the underlying 

 strata are of a sandy nature. Then the included stones are mostly 

 of the same kind as the rocks below, and they are nearly all 

 angular, except the few far-travelled ones which are associated with 

 them in the deposit. 



The size of the boulders included in any of the deposits varies 

 extremely — ranging from pieces of rock less than an inch in 



