IV. Remarks on the Chalk Cliff's in the neighbourhood of Dover , and 
on the Blue Marie covering the Green Sand, near Folkstone, 
By WILLIAM PHILLIPS, Esq. f.l.s. 
MEMBER OF THE GEOLOGICAL SOCIETY. 
[Read 2d January, 1818.] 
The natural section of the chalk, presented by the cliffs extend- 
ing from Dover about eight miles eastward towards Deal, and five 
miles westward towards Folkstone, affords the opportunity for 
observing the nature of that formation, and the numerous falls on 
the shore, occasioned by accident or design, give more immediate 
access to the study of the organic remains they inclose. 
The highest point of the range is in the immediate neighbourhood 
of Folkstone, about a mile north of the town, and is, according 
to the survey published by the Board of Ordnance, 575 feet above 
the level of the sea. From the signal-house, above Folkstone, the 
depression of the cliff towards Dover, is very gentle. The hill on 
which Dover Castle stands, is, at its highest part near the Turnpike, 
390 feet high* : — and if we suppose the cliff, where the castle walls 
terminate, to be 50 feet lower, which must be near the fact, we shall 
assume it to be in that place, 340 feet high. From this place, the 
cliff, generally speaking, declines in height gradually towards Deal, 
terminating about a mile from that place, and disappearing near 
* Geological Transactions, Vol. IV. p. 437. 
