. Geological magazine. 132 Reports and Proceedings— The next series above is a marine series, and is some 400 or 500feet thick. The base beds are dark sands and clays, succeeded bypebble-beds and sands, then more sandy clays with pebbles, andending with a thick deposit of white sands. This marine portion ofthe series occupies the cliffs between Boscombe and High Cliff. Plain as this order of deposition appears, we have collateral proofthat this interpretation is right, for at Alum Bay there is a completesection of the whole of these beds, although somewhat thinned out,and upheaved vertically.
. Geological magazine. 132 Reports and Proceedings— The next series above is a marine series, and is some 400 or 500feet thick. The base beds are dark sands and clays, succeeded bypebble-beds and sands, then more sandy clays with pebbles, andending with a thick deposit of white sands. This marine portion ofthe series occupies the cliffs between Boscombe and High Cliff. Plain as this order of deposition appears, we have collateral proofthat this interpretation is right, for at Alum Bay there is a completesection 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 theother, and can examine them all in detail within the space of a fewhundred yards. The thick pipe-clays and quartzose grits which we find at thebottom of the series can without the slightest hesitation be referredto the result of the wearing away of granite LEAVES OF DICOTYLEDONS. Fig. 3. At Studland the grits are not so coarse, and at Alum Bay, a longway 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 Geologists Association. 133 worked at Branlcsea below the sea-level, at Parkstone, and nearBourne. At Alum Bay they are tilted up, and are full of beautifulfossil leaves. (See Woodcuts Figs. 3 and 5.) The series of beds above are of a different character, andmark a great change in the conditions of the land, from a valley iuwhich the previous beds were deposited, to a broad low-lying tractin proximity to the sea. We believe we can trace how this tractbecame gradually lowered and lowered down to the sea-level. The conclusion as to the gradual lowering of the land in thisarea is borne out by the fact that in the cliffs near Poole, which areslightly lower in position than those farther east, we get only
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