Chalk Cliff's near Dover \ 
41 
There is no doubt that this deposit is altogether analogous to 
that underlying the chalk at Mailing in Kent, in Cambridgeshire, 
and Oxfordshire, and in the latter counties provincially termed 
gault . In the collection of the Society specimens of the beds and 
of the fossils of Folkstone and Cambridgeshire are arranged together 
as being identical. 
ALLUVIUM. 
The summit of the chalk cliff near the signal-house is covered by 
a sand of a bright red colour of various shades, and from 10 to 20, 
and even in some places, 30 feet in thickness. Here and there it 
is intermixed with clay, when the red colour which it assumes in 
its purer state is less brilliant. Here and there also small glistening 
particles are scattered through the sand, having all the appearance 
of being scales of mica that have suffered by removal from their 
original situation, the edges being ill-defined and even ragged. 
Masses of sandstone, consisting of minute, rounded, and transpa- 
rent particles of siliceous matter, agglutinated by an ochreous ce- 
ment of a deep brown colour, lie in the sand, but in one place only, 
which is very near the signal-house, with any appearance of 
stratification ; but even in this instance, it is too obscure for deter- 
mination. 
The sand continues of the varying thickness above mentioned, 
for at least half the way to Dover ; after which it sensibly decreases, 
and is nearly lost before we arrive at Shakspeare’s Cliff, except that 
occasionally the thin alluvium lying on that part of the cliff is 
somewhat coloured by it. The whole surface of the country, for 
a considerable distance north and north-west of the signal-house, 
Vol. V. f 
