Page:Transactions of the Geological Society, 1st series, vol. 4.djvu/307

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 * No. || || Feet.
 * align="right" valign="top" | 6. || Consolidated argillaceous rock full of oysters, with a few cyclades and cerithia || align="right" valign="bottom" | 5
 * align="right" valign="top" | 7. || Alluvium full of broken chalk flints mixt with sand || align="right" valign="bottom" | 10
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 * || || align="right" | 116
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On comparing this section with those we have given in the London Basin we shall find a correspondence very striking. (See coloured sections, Pl. 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. 3, at Newhaven, is the ash coloured sand of Woolwich in diminished thickness. 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 inclusive 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. Pl. 10.*) Here they enter the English Channel, and just touching the coast with their outlying fragments