132 
Reports and Proceedbigs — 
The next series above is a marine series, and is some 400 or 500 
feet thick. The base beds are dark sands and clays, succeeded by 
pebble-beds and sands, then more sandy clays with pebbles, and 
ending with a thick deposit of white sands. This marine portion of 
the series occupies the cliffs between Boscombe and High Cliff. 
Plain as this Order of deposition appears, we have collateral proof 
that this interpretation is right, for at Alum Bay there is a complete 
section of the whole of these beds, although somewhat thinned out, 
and upheaved vertically. We see in succession the lower pipe-clays, 
the brilliant sands, the darker clays, sands, pebble-beds, one after the 
other, and can examine them all in detail within the space of a few 
hundred yards. 
The thick pipe-clays and quartzose grits which we find at the 
bottom of the series can without the slightest hesitation be referred 
to the result of the wearing away of granite rock. 
Fig. 3. 
At Studland the grits are not so coarse, and at Alum Bay, a long 
way east, the sands are very fine, so that any one knowing the dis- 
trict could teil which of these specimens came from either place. 
These clays extend under the surface, east ward, for they are 
