346 D emulation. 



by means of which we may attempt to calculate its 

 remoteness. 



I have gone so far into details on this subject, 

 because the ' Denudation of the Weald ' has given rise 

 to much theorising by distinguished authors, and I wish 

 to show the reasons why I think that the amphitheatre- 

 like form of the area, and the escarpment of the Chalk, 

 are not due to marine denudation or the beating of 

 sea waves. On the contrary, the outer crust of Chalk 

 that once cased the whole as the strata of the anticlinal 

 curve having been planed off, and by subsequent ele- 

 vation a tableland having been formed, the softer rocks 

 below that cropped up to the surface of this plane were 

 then attacked by running water, and worn away so as 

 to form by degrees the hills and valleys of the district, 

 including the great escarpment of the North and South 

 Downs. 



Though the Secondary and older Tertiary strata of 

 England generally lie flat or dip at low angles, yet in 



FIG. 74. 

 Section across the Isle of Wight. 



Solent. /Alum Bay 



g, Lower Greensand; c, Chalk; e, Woolwich and Beading beds, 

 London Clay and Brasklesham and Bagshot Sands, and the 

 overlying Freshwater strata e. 



one instance they have been very considerably disturbed ; 

 for on a line which runs through the Isle of Wight and 



