﻿280 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



[Mar. 6, 



4. Ashclown Sand. — The Ashdown Sand, too, is the same as be- 

 fore. It still is rocky at or near the top ; that is to say, thick-bedded 

 sandstone or rock-sand is found not many feet below the base of the 

 Wadhurst Clay ; for the rest, it is such that one cannot distinguish 

 it from the Tunbridge "Wells Sand. I have not seen any great thick- 

 ness of it. The bottom has not been reached. 



5. Hastings Sand around Hastings and Battle. — These three beds, 

 then — two of sand with one of clay between them — spread over a 

 considerable area, without undergoing any great change ; and beyond 

 this part, where I have myself examined them, Mr. Charles Gould, 

 who was then on the Geological Survey, made out at the same time 

 their succession about Hastings and Battle and further to the north- 

 west ; and he has described them in his notes in much the same terms 

 that I have used for them, though it would seem that the clay in 

 the middle (the Wadhurst Clay) is there of a less thickness, and has 

 a greater admixture of loam and sand, than in the more northerly 

 part. Mr. Gould and myself, though the districts we were upon 

 were quite separated, worked up to and identified a section in an 

 intermediate spot, so as to be sure of the true relation of the beds in 

 the two districts. Quite lately I have been in the very easterly 

 part, at Eye and thereabouts, and have found similar strata with the 

 same general character, and which may therefore be considered to 

 belong to all the Hastings Sand that is east of Tunbridge Wells. 



IV. Westward of the Meridian of Tunbridge Wells. 



1. Weald Clay. — Next in course we will follow the strata west- 

 ward from our first starting-point. The Weald Clay, as a whole, 

 continues the same. A sandy bed of no great thickness occurs near 

 the bottom, which appears to be a continuation of the one I men- 

 tioned before : it may be traced pretty distinctly as far as Ling- 

 field ; and so may the horizon below it, which I fix on for the top of 

 the Hastings Sand ; but west of Lingfield, for a length of about eight 

 miles, neither line is so definite. There is a good deal of loam in 

 the bottom part of the Weald Clay, and what clay there is is mostly 

 sandy clay : the fine I have taken for the boundary is where this 

 doubtful stuff ends and the purer sand begins. It must be remem- 

 bered that it is within quite narrow limits that its right position is 

 doubtful. Beyond Three Bridges Station the change from clay to 

 sand becomes more marked again, and keeps so till near Horsham, 

 where there is some difficulty in pointing out the exact boundary. 

 It is clear, though, that the sand does not extend more than a mile 

 beyond that town, but, dipping gently westward, disappears beneath 

 the Weald Clay, the boundary-line changing its direction and trend- 

 ing to the south-east. 



'2. Tunbridge Wells Sand, Upper and Lower, with the intermediate 

 Grinstead Clay. — Of the Tunbridge Wells Sand, we will first speak 

 of the upper half. The bed of rock-sand at the top of it continues 

 for some miles ; it forms a fine line of rocks at Bedleaf, Penshurst, 



