Wealden District and the Bas Boulonnais. 19 



mile from its foot. The sand emerges from beneath the chalk in the same manner by 

 Albury, Shiere and Wotton, though, as we proceed easterly, the first escarpment of 

 greensand (at the foot of which the river runs by Albury) becomes less determinate. 

 On the south of this line I could find no distinct indications of southerly dip ; on 

 the contrary, all my observations indicated a gradual rise of the beds from the foot 

 of the first to the summit of the second escarpment of greensand along Leith Hill 

 and Hurtwood Common. I therefore concluded that this was, throughout the 

 whole of the range above mentioned, an extremely well-defined line of flexure, 

 without being anticlinal. Mr. Martin regards the part of the line east of Guildford 

 as a continuation of his Pease Marsh line*. 



■ As we proceed westward of Gomshall, this line is perhaps somewhat less di- 

 stinct. Immediately south of Dorking, however, it is well marked in Berry Hill, on 

 the south side of which the Weald clay is brought to the surface, dipping rapidly to 



SECTION THROUGH DORKING. 



12 3 4 5 



5. Chalk. 



4. Gault. 



3. Lower Greensand. 



2. Weald Clay. 



1. Hastings Sand. 



the north. Still I found no indications of an anticlinal arrangement. In proceed- 

 ing across the small valley in which Berry Hill Park is situated, and thence up the 

 hill on the road to Leith Hill, we find the junction of the lower greensand and 

 Weald clay at a considerably greater elevation than at Berry Hill, From the latter 

 to the former point, the Weald clay would probably rise by its general inclination 

 in Leith Hill, which is much smaller than that with which it rises up to Berry 

 Hill. 



The continuation of this line is also recognized along the range of hill extending 

 from Park Hill, Reigate, by Bletchingley to Tilburstow Hill, south of Godalming. 

 The Weald clay appears at a considerable elevation on the south side of the latter 

 hill. If the inclination with which it rises to that point were continued south of 

 it, the width of the surface occupied by this formation would probably not exceed 

 three times its thickness. The actual width is however about four miles. There 

 must consequently be a great change of inclination immediately to the south of 



* The difference between my representation of these phaenomena and Mr. Martin's arises merely from 

 my recognizing the line of flexure as that which ought to be especially noted, rather than that which 

 he considers as marked by a small degree of anticlinal arrangement. 



d2 



