268 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 22, 



tish. earthwork, or rather by what remains of it, as about half has 

 been lost from the gradual wearing backward of the cliflF. When 

 this work was made, the ground must have reached much further 

 south than now, in the form shown by the dotted line in fig. 2, as 

 such works are always on hills. 



The fort was far from finished when I saw it ; but the unfinished 

 western ditch gave some sections of gravel and loam above and 

 sometimes wedged into the clays of the Woolwich Beds, as in figs. 

 3 «fe 4, which represent part of the same pipe (fig. 3 the western side, 

 and fig. 4 the eastern). 



3. General RemarTcs. 



The Dieppe section seems to show a sort of passage from the 

 Oldhaven Sand up into the London Clay, layers of sand occurring 

 in the latter. There is also sand in the same position at New- 

 haven, where, however, the Oldhaven Beds are not present. 



The sections show the extent of the same beds (insignificant as 

 they are in thickness), or of like conditions, in the Lower London 

 Tertiaries, — the Oldhaven Sand of Dieppe (3) being just like that of 

 East Kent*, the shelly clays of the Woolwich Beds both at Dieppe 

 and Newhaven (5) being the same as those of West Kent (with estua- 

 rine shells)t, the thin bed of lignite, peaty clay, or firm sand that 

 occurs throughout Kent occurring also in the sections above de- 

 scribed (6), and the lowest sand at both (8) seeming to be the same 

 as that which forms the whole of the Woolwich Beds in East Kent, 

 and occurs in West Kent also J. 



The mottled plastic clays are absent ; and the bottom-bed (9) con- 

 sists of flints partly rolled, as is elsewhere the case where it rests 

 on the chalk — and not of flint-pebbles, as where it rests on the 

 Thanet Beds. 



DiSCITSSIOK'. 



The Chairman (Prof. Morris), in inviting discussion, called at- 

 tention to the existence of Tertiary beds of similar character near 

 Epemay and Rheims, and in other parts of France. 



Mr. Evans remarked on the bearing which this extension of soft, 

 yielding strata had on the excavation of the Channel. The dis- 

 turbances in the sands and clays might be due to the springs having 

 formerly, owing to the distance of the sea and the river- valley not 

 having been excavated, stood at a higher level, and having thus 

 softened or washed away the bed beneath the gravels. 



Mr. Pattison mentioned that in all the combes along the French 

 coast towards Treport there were traces of soft Tertiary beds and 

 blocks of sandstone. 



Mr. Whitaker, in reply to a question from the Chairman, stated 

 that, to the best of his belief, the sandstones at Dieppe were not 

 calciferous. The sands were above the Woolwich beds, and there- 

 fore not Thanet sands. 



* Quart. Journ. Geol. Soc. vol. xxii. p. 410 (bed 3). 



+ Mr. Prestwich has given a list of the fossils found at Newhaven. 



J Quart. Journ. Geol. Soc. vol. xxii. p. 409 (bed 2). 



