240 THE WONDERS OF GEOLOGY. Lect. III. 



oyster-bed, where pebbles enter into the composition of the 

 concreted masses, closely resembles the Bromley conglo- 

 merate (p. 230). I have collected a few teeth of sharks, 

 but no other vestiges of fishes have been observed. At 

 Chimting Castle, near Seaford, on the eastern escarp- 

 ment of the valley of the Ouse, olive-green sand, and a 

 ferruginous conglomerate of chalk-flints, lie upon the chalk ; 

 proving the further eastward extension of the tertiary beds 

 along the Sussex coast.* 



To the west of Brighton, the London clay is perceived 

 near Worthing, emerging from beneath the alluvium which, 

 as we have already seen, contains remains of elephants. 

 At Bognor, an arenaceous limestone, full of the usual 

 shells of the London clay,f constitutes a group of low 

 rocks, which in another century will probably have entirely 

 disappeared. The beauty and variety of the shells, parti- 

 cularly of the nautili, and of the perforated fossil wood, 

 render these organic remains objects of considerable interest. 



In the blue clay at Bracklesham Bay, on the western 

 coast of Sussex, and at Stubbington, fossil shells may be 

 obtained at low-water in profusion ; j and Hordwell and 

 Barton Cliffs, in Hampshire, § have long been celebrated 

 for similar fossils; shells from these localities are to be 

 found in almost every collection of organic remains. 



28. Fresh-water tertiary strata of the Isle of 

 Wight. — The peculiarity of the Isle of Wight eocene 

 strata as compared with those of London, consists in the 



* Geology of the South-East of England, p. 62. 



f Fossils of the South Downs, p. 271. 



t Bracklesham Bay, on the western coast of Sussex, is bounded by 

 a low cliff composed of blue clay, and green sand, full of fossil 

 shells, fishes' teeth, and other remains. For a particular account of 

 this productive tertiary locality, see " Excursion to Bracklesham Bay" 

 in my Medals of Creation, vol. ii. p. 902. 



§ These cliffs are fully described in my Geology of the Isle of Wight, 

 chap. v. p. 164. 



