Law of Water/alts. 



455 



Fig. 24 represents the valley of Ecclesbourn, near Hastings, in the pluvial 

 period. 



The model of Brading Gorge, in the Isle of Wight, shows that the rainfall, 

 thrown off the lofty Chalk and Upper Greensand hills near Shanklin has, in 

 comparatively recent times, cut a passage through the lower range of Chalk 



£CCC£530UBN_ CLEM. 



A.TYLOR 

 PEL 



and Upper Greensand hills near Brading. The higher elevation of the bed A 

 (Fig. 25), caused by subterranean movement, is the cause of the direction of 

 this rainfall collected into brooks from Ventnor to Brading. The same bed of 

 Lower Greensand, at Shanklin, is 250 ft. above the sea ; while near the Gorge 

 of Brading it is at the level of the sea, giving a fall of 40 ft. in the mile. The 

 level of the chalk is 500 ft. at St. Boniface's Down, near Bonchurch, and 300 ft, 



