110 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



These fossils are, however, very rare : I have not found them else- 

 where on this side of Canterbury. 



On Shottenden Hill, three miles S. of Boughton, is an outlier of the 

 Lower Tertiaries capping the chalk, and singular in that it exhibits 

 the only instance in this district of the occurrence of the shingle-beds 

 of the Basement-bed of the London clay, forming a mass as distinct 

 as that on Blackheath, and from 30 to 40 feet thick. 



Another interesting phsenomenon is also met with at this place : 

 beneath the shingle are the light-coloured quartzose pebbly sands of 

 the Woolwich group, and in the upper part of this bed are occasional 

 small masses of a soft concreted sandstone, the upper surface of 

 which is often full of the holes of a boring mollusk, apparently a 

 Lithodomiis. I have found no other traces of organic remains in 

 these beds. 



The next clear section, or rather series of sections, is at the \allage 

 of St. Stephen's, one mile N.W. of Canterbury. In one pit, the 

 London clay reposing upon the Basement-bed, and in another the 

 latter on the faint-green sands of the Woolwich group, may be seen. 

 But the most complete section occurs at the entrance to the tunnel on 

 the Whitstable Railway, where the sequence of the Lower Tertiaries 

 from the London clay to the Thanet Sands is well exposed. 



Fig. 12. — Section on the Whitstable Railway, near Canterbury. 

 (PI. L Diag. A, Loc. sect. 42.) 



3. London clay. 



I. Basemeut-bed (light sands with large 



blocks of pebbly ironstone*). 

 11. Woolwich series (light-coloured sands 

 mixed with some green sand and a 

 few pebbles). 

 III. Thanet Sands. 



III. 



The fossils in the " Basement-bed" " i." are numerous ; but none 

 occur in the pebbly sands "ii." : traces of sponge-like ferruginous 

 concretions are, however, common. Both are about 20 feet thick. 



The most important section, however, in this district is on the coast 

 between Heme Bay and the Reculvers. Here, in addition to the large 

 surface exposed, the beds are more fossiliferous than usual. The 

 following is a description of the cliff immechately east of Bishopstone 

 ravine (see Journ. Geol. Soc. vol. viii. p. 239. pi. 15). 



* Tliese blocks of ironstone extend to Boughton, from which locality the or- 

 ganic remains enumerated in my paper in tlie Journ. Geol. Soc. vol. vi. p. 264, 

 were obtained. This bed has since been found to be sufficiently rich in iron to 

 be profitably worked, and it is now, I understand, quarried and sent to the Staf- 

 fordshire furnaces. 



