908 PROFESSOR J. PRESTWICK ON THE EVIDENCES OP A SUBMERGENCE 
The Coast Sections of France. 
The phenomena on the north coast of France are very similar to those on the south 
coast of England. The section of the Ptaised Beach and overlying Ptubble-drift (or 
head) at Sangatte on the northern slope of Cape Blanc Nez is identical with that at 
Fig. 1. —Section of the west end of Sangatte Cliff, near Calais, 
E W 
a'. Alternating irregular mas.ses, often contorted, of coarse and fine fiint-and-chalk rubble and marl, 
with layers of light coloured loam (or Loess). The top bed has lo.st much of its chalky matter, and 
passes at Sangatte into mere Hint gravel. Mammalian remains have been found at xxx, land shells 
at XX, and a palceolithic Hint implement at x (others have been picked up on the shore.) 
c. Raised beach. A portion of the beach has been caught and turned up in the rubble. At the foot of 
the old clifi’ lie large blocks of chalk. C. Chalk. 
Brighton, but the former is more accessible and better exposed. The raised beach (c), 
which rises about 10 feet above the level of the present beach, abuts, as at Brighton, 
against an old cliff. It contains very few shells, and those mostly in fragments. The 
species are the same as those commonly met with in the English raised beaches, and 
consist of*— 
Purpura, lapillus, Tellina haJthica. 
Littorina littorea. Mytilus edulis. 
,, ohusata. Cardium edule. 
Modiola modiolus. 
This beach is buried under a head consisting of chalk and flint rubble not regularly 
stratified, but spread out in irregular lenticular masses. In some of these the detritus 
is coarse and the bedding tumultuous ; in others the ddbris is fine, and even laminated 
in places. These alternations are repeated several times, but it is not possible to say 
how often, as the beds overshoot one another, and the lines of demarcation are obscure. 
The last or upper bed is, however, as at Brighton, the most massive and important, 
* M, C. Bareois, in ‘ Ann. Soc. Geol. du Nord,’ vol. 7, p. 182, 1880. 
