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Reports and Proceedings — 



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. 



LEAVES OF DICOTYLEDONS. 



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 tell which of these specimens came from either place. 



These clays extend under the surface, eastward, for they are 



