The Rev. W. Buckland o?i the Plastic Clay Formation. 297 



No. Feet 



6. Consolidated argillaceous rock full of oysters, with a few 



cyclades and cerithia ---------- 5 



7. Alluvium full of broken chalk flints mixt with sand - - 10 



116 



On comparing this section with those we have given in the London 

 Basin we shall find a correspondence very striking. (See coloured 

 sections, PI. 13, No. 1 & 2.) On the same chalk No. 1. is the Reading 

 Oyster bed, No. 2. which though inconsiderable in thickness seems 

 constantly to form the next stratum above the chalk, though organic 

 remains have been noticed in it only at Reading. No. S, at New- 

 haven, is the ash coloured sand of Woolwich in diminished thick- 

 ness. Nos. 4, 5, and 6, appear to be an enlarged condition of the 

 plastic clay bed No. 7 and 8 of Woolwich, and from 7 to 11 in- 

 clusive at Loam Pit Hill. 



We again observed localities of the red variety of plastic clay in 

 a small valley at the village of Binstead, three miles west of Arundel, 

 and again on the declivity of the hill by which the Binstead and 

 Chichester road descends into Arundel. 



These insulated portions of strata of the plastic clay formation 

 that have been noticed at Seaford and Newhaven, and other places 

 at the south base of the chalk hills of the South Downs of Sussex, 

 appear to be outlying fragments at the eastern extremity of the great 

 series of depositions above the chalk in the south of England, which 

 Mr. Webster describes as extending from near Dorchester by the 

 Trough of Pool and the New Forest to Portsmouth, Chichester, and 

 the flat coast on the south-east of Arundel. (See Mr. Webster's 

 Map, vol. ii. Geo. Trans. PI. 10.*) Here they enter the English 

 Channel, and just touching the coast with their outlying fragments 



