WESTLETON EEDS TO THOSE OF NORFOLK, ETC. 143 



The last trace of such drift I have met with on these Chalk 

 Downs was on Monument Hill above Calne, where there are a few 

 scattered pebbles of white quartz, quartzite, chert, and ironstone, 

 with subangular flints and flint-pebbles, but its exact relation is 

 uncertain. 



3. Westleton Beds 07i tlie South of the Thames. 



The Boulder-clay, it is well known, has not been found south of 

 the Thames, though some Pre-Glacial beds have a considerable 

 extension in that direction, and evidence of glacial action is not 

 wanting. Owing, however, to their isolation and want of continuity 

 the classification of these beds is attended with more uncertainty. 



Kent. — In the north-eastern corner of Sheppey the cliffs at 

 Draper's Point, there about 170 feet high, are capped by a Drift 

 distinct from that which is spread over a great part of the higher 

 ground of that island. It consists of from 15 to 20 feet of yellow 

 sands with seams of clay and patches of gravel, the bottom bed of 

 gravel being from 1 to 2 feet thick, and composed essentially of flint- 

 pebbles of various sizes, of large subangular flints much worn and 

 stained brown, numerous small flint-fragments, and some very 

 small pebbles of quartz, and at one spot I found a much worn 

 fragment of brown chert. It is not improbable that these beds 

 are of Westleton age. They are overlain by a flint-gravel in small 

 pockets. 



I know of no other bed of this character in Kent, except one 

 between Shottenden Hill and Sellings (400 feet), where there is a 

 sprinkling of Drift consisting of Tertiary pebbles and pebbles of 

 quartz. But both these cases are obscure. 



I do not refer the shingle on the top of Shooter's Hill or the 

 gravel on Swanscombe Hill to this horizon. 



Surrey and Hants. — Further westward traces of the Westleton 

 Beds become very indistinct. There are remnants of a quartz-drift 

 at Englefield Green (264 feet) and on some adjacent hills ; but it is 

 another Pre-Glacial high-level gravel-drift (see Part III.) that 

 prevails almost exclusively in this district. 



4. Possible Extension of the Westleton Shingle beyond the 

 Thames Basin into Somerset. 



Passing from the Chalk Downs to the Oolitic Hills further west- 

 ward, there is at one spot, Kingsdown near Bathford, about 550 

 feet high and 5 miles from Bath, a Drift of the Westleton 

 character. It forms only a small patch on the otherwise bare surface 

 of the Oolites, and consists of a light-brown sandy loam, with 

 slightly subangular flints, some flint-pebbles, many wiiite quartz- 

 pebbles, and an occasional pebble of sandstone and of a greenish 

 quartz *. It is covered by a brown earth with local Oolitic debris. 



* The Rev, H. Wiiiwood, F.G.S., has pince found a subangular I'raguieut of 

 Sarsen stone and a pebble of black chert or hornstone. 



