SPECIAL GEOLOGY. 



Sussex: while, to the westward of Brighton, the London 

 clay rises to the surface beyond Worthing, and forms the 



FIG. 263. Nos. 1 and 2, Palndina concinna. 3 and 4, Lymnsea pyramidalis. 

 5, Planorbis euomphalus. 



tract between the chalk-hills and the sea. The inland 

 boundary stretches by Chichester, Emsworth, and South- 

 ampton to Dorchester ; and the eocene beds extend over 

 the New Eorest, as far as Poole, being surrounded by 

 a girdle of chalk. The northern half of the Isle of 

 "Wight is composed of tertiary strata ; the island being, in 

 fact, a disrupted mass of the formations of the adjacent 

 south-east coast of England. By this disruption, the 

 strata have undergone the most singular disturbance, the 

 chalk has been lifted upright, and the tertiary beds with it. 

 These results are well displayed at Alum and Whitecliff 

 Bays, which present the phenomena of sands and clays of 

 the most varied tints, green, yellow, red, crimson, ferrugi- 

 nous, white, black, and brown, all lifted to a perpendicular 

 position, and having suffered no change, except that of 

 having been raised, with the chalk, from a horizontal to a 

 vertical plane. The beautiful and instructive sections of 

 Whitecliff and Alum Bays, which should be worked by all 

 students of tertiary geology, form the subject of an admir- 



