WEALDEN BEDS. 11 



Ft. In. 



Grey sandy clay - - - - - -7 



Ditto with much lignite (seen in Brook Point) - 6 



Current-bedded white sandstone, with much pyrites in the 



upper part (forms the foot of Brook Point) - -5 0+ 



The " Pine-raft"; numerous trunks embedded in sandstone. 



Variegated marls, seen in the fore-shore. 



Brook to Atherfield. 



We will now return to Sedmore Point, where we commenced 

 the description of the series, and follow the coast eastwards. It 

 will be remembered that the above beds described again come 

 into view, but with a gentle and nearly uniform dip, at first a 

 little north of enst, subsequently a little south of east. 



The sandstone with 1^ feet of conglomerate at its base, which 

 first appears half way up the cliff at Sedmore Poiut, thickens 

 eastwards and runs for a distance of nearly a mile, before ifc 

 finally descends to the beach 500 yards west of Chilton Chine. 

 There also it presents at its base H-2 feet of a gravel, composed 

 of pebbles of sandstone with many small bones, thouo-h this 

 conglomeratic band does not continue through the whole distance. 

 Below this sandstone lie deep-red marls, and above it come red and 

 green marls as at Sedmore Point. The latter may be well seen in 

 Chilton Chine. They contain lenticular harder bands with potato- 

 shaped calcareous concretions, and a little lignite. Another bed of 

 sandstone comes in at the top of the cliff 250 yards east of the 

 Chine, and descends to the beach about midway between Chilton 

 and Grange Cliines. This bed likewise has a gravelly con- 

 glomerate, about 6 inches thick, at its base. It contains quartz 

 pebbles, small bones, and rounded pieces of wood similar to those 

 composing the " pine-raft." It is much current-bedded, and of 

 variable thickness, reaching sometimes as much as seven feet. 



Near Chilton Chine the vertebral centrum of Eucamerotus, 

 Hulke {Ornithojnis, Seeley), which has been described by Mr. 

 Hulke,"^ was found, but from which bed is not known. Mantell 

 records that bones were collected in 1829 near Bull-face Ledge 

 also.t 



Grange Chine has been excavated in deep-red and green marls, 

 the green beds containing much lignite. On the east side and 

 near the top of the chine a conspicuous black band two feet 

 thick contains abundance of lignite, many fragments of bones, 

 and Unio valdejisis in some brown irony concretions. The bed 

 descends to the beach 200 yards west of Ship Ledge, and the 

 cliffs above it consist of red and green marls with several bands 

 of hard sandstone, liable to rapid variations in thickness. 



It may be observed here that the whole of the Wealden strata 

 of the Isle of Wight are extremely irregular, and that the thick 

 beds of sandstone which form conspicuous objects in the cliffs 



* Quart. Journ, Geol. Soc, vol. xxxv. p. 752. 1879. 



t Geological Excursions round the Isle ofWight. 3rd Ed., p. 226. 



