8 Mr. Hopkins on the Structure of the 



stratum, and belonging to Dr. Mantell's Ashburnham beds. The fault is pro- 

 bably several hundred feet. The valley along which it appears to run is marked 

 in the Ordnance Map by the course of a rivulet south-east and south of the village 

 of Hallington. 



Another great fault is also exhibited by the cutting of the same road at its 

 entrance into the western extremity of Hastings. Dark, shaly, argillaceous beds 

 there abut directly against the massive beds of white sandstone. The direction 

 of the fault is very nearly perpendicular to the Hastings line. I could find no 

 distinct evidence of it at other points more remote from the coast, though I think it 

 probable, from external indications, that it is continued across the central ridge, 

 on the east of the village of Ore. 



Wadhurst and Hawkshurst Line. — About seven miles north of the westerly por- 

 tion of the Brightling line is a range of hill, distinctly marked on the Ordnance 

 Map, passing through Wadhurst. About three-quarters of a mile north of Wad- 

 hurst, I observed a rapid dip to the north. At Best Beech Hill the beds are much 

 disturbed, and somewhat irregularly ; and a little north of Mark Cross (near the 

 western extremity of the ridge), in a large quarry near the road to Tunbridge Wells, 

 the dip is observed to be rapid and to the north. At Mark Cross and south of it the 

 dip is very small, but tends towards the south. Likewise in a large pit on the great 

 road near to and south of Wadhurst, the dip, though not large, is distinctly to the 

 south. These observations prove the existence of an anticlinal line along the ridge 

 above mentioned. Its continuation to Hawkshurst is distinctly proved by obser- 

 vations immediately on the north and south of the line, the dip being generally 

 from 5° to 10°*. I was unable to trace it with any distinctness farther than Mea- 

 grane Hill. The hills of Sandhurst and Bonhurst appear to have been the result 

 of surrounding denudation rather than of elevation. 



About three miles to the north-east of these latter places is a range of hill 

 through Rolvenden and Bennenden, which does not appear however to be con- 

 nected with any continuous line of curvature of the strata. On the contrary, in 

 returning from Bennenden to Hawkshurst I obtained a series of observations which 

 gave the dip uniformly east of north, proving the continuity of the nearly north- 

 easterly dip as far as the axis of the Bennenden range. From Rolvenden to Ben- 

 nenden I could find no evidence of any sensible inclination of the beds. This 

 range does not in fact form a very decided feature, and is probably due to denu- 

 dation, 



* The dips on the north of the line were clearly observed on the road from Ticehurst to Newhenden, 

 near Flimuell; also about Hawkshurst. To the N.E. of Ticehurst near Pillory Farm, and in some large 

 quarries near Piles He^th (Ordnance Map) and Bedgbury Park, the dip was nearly 20°. The position 

 of this line is determined very accurately. 



