44 
Mr. William Phillips on the 
ing, and it prevails along the summit of the blue marie from that 
point to Folkstone. 
Along the summit of the cliff between the signal-house and Dover* 
and indeed wherever any considerable opening appears in the chalk* 
deep indentations or gullies are visible in it, which are filled with 
clay, and which have, as it appears to me with great probability, been 
attributed to the action of water on its surface.* Even when these 
appear beneath the sand, they are commonly filled with clay, occa- 
sionally inclosing flints, the surfaces of which are ochreous. They 
are not, however, usually imbedded promiscuously in the clay, but 
are more commonly arranged close to the chalk, forming a thin bed 
in the form of the hollow which once existed in it. This arrange- 
ment is visible in almost every instance. One of these gullies, 
which appears on the side of the road, about half way between the 
signal-house and the turn of the Dover road towards Folkstone* 
deserves mention. The road is cut through it to the depth of about 
fourteen feet : the fissure holding the clay is visible to that depth, 
but is deeper, and it is about four feet wide. A few feet from the 
summit, it narrows so as to appear little more than a string of clay 
for about a foot, when it begins to open again, but not in a line with 
the upper part ; and the lines of connexion between the upper and 
lower parts are contorted and curved* 
There is one circumstance regarding the upper part of the cliffs 
that merits notice. Every where along them, and even in the 
openings beneath the surface inland, except where the chalk with 
numerous flints prevails, the chalk appears in small angular masses, 
from an inch or two to a few inches in length and breadth, and this 
appearance holds for a few feet under the surface \ near to which, it 
* Geological Transactions, Vol. I, page 176. 
