216 



PROCEEDOrGS OF TKE GEOLOGICAL SOCIETY. 



underlying chalk-rubble and gravel, has been traced near the present 

 shore by Mr. Dixon ; but further inland the drift hides the substrata, 

 untn the chalk-hills rise bare from beneath it. The same features 

 prevail yet further westward, but with a greater width of the old 

 sea-ground. Mr. Dixon gives sections at Lancing, Sompting, and 

 Broadwater, proving the existence at these points of the same sand 

 and shingle, with sea-shells, under subangular drift, at a distance of 

 1 to 1| mile inland, and near to the base of the chalk-hills. 



Between Broadwater and Arundel, I was unable to find any clear 

 section of this deposit, although there are, I consider, traces of it 

 to be seen in the presence of rounded shingle at slight elevations 

 to the E. and S.E. of Arundel, and at a distance of three to four 

 miles from the sea. In proceeding westward from Arundel this 

 sea -bed becomes, owing to the greater height and more broken 

 nature of the ground, much more distinct, and can be followed, with 

 little difficulty and with but slight breaks, to beyond Chichester. 

 The first place where I found it exposed was in a pit in the wood on 

 the north side of the high-road from Arundel, and exactly two miles 

 due west from Arundel Castle. It there puts on the form of a bed 

 of sand about 6 to 8 feet thick, and is overlaid by subangular 

 flint-gravel. This sand contains no fossils, and is so much like some 

 Tertiary sands that it might almost pass for them. It contains, 

 however, thin patches of worn shingle, and a few rolled beach-formed 

 pebbles, which afforded some slight grounds for separating them from 

 the Eocene mottled clays on which they repose. The ground con- 

 tinues to rise gently, and on the brow of the hill looking down into 



Fig. 1. — Section of the Sand-pit north of Avisford Bridge. 

 s. ___— _ . . _ N. 





feet. feet. 



a. Brick-earth, forming the core of gravel-furrow or pipe 10 by 8 



a'. Dark ferruginous sandy clay, full of large angular flints ... 5 to 6 



c. Worn and partly-rounded flint-sMngle in dark clay 3to4 



c'. Fine sand, with a few thin seams of shingle, and some 



rough flint-pebbles 16 



the pleasant wooded dell which runs at right angles to the road at 



