THE SOTJTHEEN POETION OF THE WEAEEEN AREA. 



647 



Although this is undoubtedly a terrace-gravel, scarcely any signs of 

 stratification are visible in this section. South of Lewes gravel 

 occurs on the summits of the two low hills, called respectively 

 Upper and Lower Rise, at an elevation of nearly 50 feet above the 

 level of the alluvium. Besides flints, some Tertiary and Wealden 

 pebbles occur here. The whole of the slope bordering the alluvium 

 between Kingston and Bodmell is covered with angular drift up to 

 the 100 feet contour, making a well-defined terrace-gravel. At Eod- 

 mell windmill there is an interesting section of this gravel resting 

 upon the Lower Chalk, into which it penetrates in deep pipes, 5 or 

 6 feet deep. The gravel here consists of angular and subangular 

 flints, apparently less angular than the watershed-gravels, with a 

 lot of small "Wealden pebbles, disseminated through a clayey loam. 

 The pipes have a well-defined coating of clay, with only a few 

 flints, between the gravel and the chalk, a phenomenon which has 

 previously been noticed in connexion with gravel-pipes in calcareous 

 rocks *. 



Crossing now to the eastern bank of the Ouse, from Beddingham 

 to West Firle, and thence to the railway at Burgh Bridge, a good 

 many flints are scattered over the surface in a thin band parallel to 

 Glynde Reach, and occupying generally the 50 feet contour ; but no 

 sections were noticed showing any depth of gravel. Between West 

 Firle and Selmeston also the fields usually have a plentiful coating 

 of angular flints, especially near Eipe Crossing and Sherrington. 



So far as the river-gravels are concerned, the Ouse north of 

 Barcombe has very few patches of any importance, although small 

 deposits occur at Isfield, Little Horsted, Buckham Hill, and Buxted 

 Park, while loams and brickearth occur near Sheffield Bridge and 

 Lindfield. On entering the Hastings-beds country flints no longer 

 occur either on the surface or in the river-gravels. 



The watershed between the Ouse and Cuckmere passes through 

 Selmestou, and on approaching the higher ground uear this place 



Fig. 8.' — Section at Selmeston Church. 



1. Lower Greensand. 2. Gravel. 



flints become more abundant, until near Selmeston church a good 

 section is seen showing 7 or 8 feet of angular gravel resting upon an 

 eroded surface of Lower Greensand. The flints here are very 



* Prestwich, Quart. Journ. Geol. Soc. vol. xi. p. 79 ; and Foster and Topley, 

 " Superficial Geology of the Medway," Quart. Journ. Geol. Soc. vol. xxi. p. 455- 



