1916.] 



THE DEPOSITS. 



365 



and sands in bands of various thickness, clay with rounded 

 boulders and clay without stones or even gravel. These 

 deposits are not the same everywhere but vary with the 

 district, being uniform only in their position as regards the 

 geological horizon in which they occur. Thus the coast 

 deposits immediately overlie the 25 feet beach. (See Dia- 

 gram No. 4.) They all contain the large stones described in 



Diagram No. 4. 

 Section showing the formation of the Head. 



Soil. 



Recent Cliff De- 2 

 bris. 



AfhfuJhj^Hi 



Upper Clay. 



Land Rubble. 



Lower (Boulder) 

 Clay. 



Sand. 



Raised Beach. 

 Sand. 



Rock. 



0°^ 





CD <=3 



*5> C^> 



:':\v- >;..>;• 



or <^7 



0° 

 6 



----" C->-' 





o c^> 



'■■ \y •'•.•':. 



O O • • m • 

 a o • 





Soil. 



Recent Cliffs. 



3 Upper Clay. 



Old Land Sur- 

 faces. 

 Lower Clay. 



6 Boulder Clays. 



7 Sand. 



8 Raised Beach. 



9 Rubble. 



Guernsey. Jersey. 



the last part, and (or with few exceptions) two deposits of 

 clay, one of which is usually termed a boulder clay because of 

 the association with boulders as distinct from stones derived 

 from the cliff falls, the second being termed the upper clay 

 which has a distinct appearance of a clay deposited from 

 water by settlement. 



Inland these occur on the slopes of hills, but some of the 

 layers are missing, the succession being only to be demon- 

 strated by combining a number of deposits. 



The differences are such that only by studying all the de- 

 posits together instead of separately, as is usual, their true suc- 

 cession can be made out. For instance : at Brighton the upper 



