the London and Hampshire Basins. 475 



ance. This arrangement in relation to tlie long and important 

 flexure of Greenhurst on one side^ and of the anticlinals of the 

 Vale of Wardour and Portsdown on the other, appears to corre- 

 spond with that intercurrency, or digitation of fissures, which 

 Mr. Hopkins seems to consider an essential part of his system*. 



J have previously spoken of the same arrangement on the 

 north side of the great anticlinal, in the decline respectively of 

 the Peasemarsh line, or more properly of the Froyle and Pop- 

 ham-beacon line, and that of Pewsey, in the Basingstoke country. 



Lacerated Escarpments. — Although minor indications of this 

 phsenomenon, familiar to the practised eye, occasionally peep 

 out, it is not often that we can get behind the mass of debris 

 with which the basset edges of stony strata are encumbered. I 

 have spoken of the entrance to a quarry of the upper green sand- 

 stone at Ray Common near Reigate, exhibiting unequivocal 

 marks of the original violence. That quarry is now in disuse, 

 but an open one is being worked a little to the east of the same 

 place, on the outskirts of which obscure indications of contor- 

 tion and displacement are visible ; such as to show, that if a 

 clean section could be obtained, transversely to *the plane of 

 stratification, from the chalk above to the gault beneath, a good 

 specimen of lacerated escarpment would be brought into view. 

 There is at this point a very remarkably prominent terrace of 

 the stratum in question, illustrative of the projection given to 

 such indurated layers at the angles of cross fracture, the trans- 

 verse valley of Smitham-bottom running out southward here by 

 Merstham and Redhillf. 



Denudation and Diluvium. — It has been suggested to me that 

 so remarkable a feature as the bare sand-rocks about Tunbridge 

 Wells ought to be noticed in any disquisition on the Weald- 

 area, however summary. No one can look at these rocks, or 

 walk over those of Bridge Park, without being struck with their 

 singular position and prominence, not in any way accountable 

 but on the supposition of the violent abrasion of diluvial flood. 

 It is well known that similar appearances are to be found all the 

 world over, where layers of durable and destructible materials 

 alternate with each other. And no one can view the wilds of 

 Henley Heath and Bexley Hill, and the head of HartingcombeJ 

 (covered as they are with boulder stones, and other signs of the 



t This upper greensand platform is also noticed by Mr. Prestwich,— 

 "Water-b.earing Strata," &c., p. 80. 

 X West Sussex. 



