4 GEOLOGY OF TUE WARREN. 



of our land reared one of their largest temples. All the chalk ranges 

 of England commence at Salisbury Plain, radiating from it to the 

 north-oast, east, south-east, and south-west. What we see here is the 

 termination of the east range, known generally as the North Downs, 

 forming the Northern boundary of tho Weald of Kent. The precipitous 

 and abrupt appearance of the clifis will cause any thoughtful mind to 

 ask the question — Did the range ever extend farther seaward than it 

 does now? As the cliffs appear to be continually undergoing degrada- 

 tion, there are certainly grounds for supposing that it did. Cast your 

 eyes across towards France, and when the atmosphere is in a favour- 

 able condition you will behold a similar termination of chalk liills on 

 the opposite coast, just as abrupt, just as steep. The geologist will 

 tell you that in ages gone by the cliffs of Albion were united with 

 those of Gaul, that our country was not then an island, but a portion 

 of some large continent ; and that the separation has been effected by 

 a gradual sinking of the land, and the incessant dashing of the ocean 

 waves on a barrier too feeble to resist their mighty influence. The 

 increased shallowness of the water in the line between these cliffs, 

 compared with that of the sea on either side of it, supports this view, 

 as does also the fact that the other formations found here beneath the 

 chalk occur there in the same order. This hypothesis accounts at 

 once for the mode in which our present island became populated with 

 its various wild inhabitants, as well as with the lions, elephants, mon- 

 keys, hysenas, &c., the remains of which are disinterred by the 

 geologist. They crossed over, not by water, but by the land that ia 

 now submerged. 



The Chalk is the uppermost of the secondary series of rocks, and is 

 a very extensive deposit, being found not only in England but in various 

 parts of Europe between us and the Black Sea. It is formed chiefly 

 of the remains of shell fish and microscopic animals, being found to 

 consist of carbonate of lime ; and was evidently deposited in a tranquil 

 deep sea, far from land, as the nature of the animal remains testifies. 

 The climate, too, was a much more equable one then than it is at pre- 

 sent, and much warmer ; very few vegetable remains of any kind are 

 found in it. The fossils found in it in this locality are abundant, but I 

 have not as yet worked them much ; here we may get, however, 

 numerous Terebratulce, Sea Eggs of several kinds, AnancJiytes, Mi- 

 craster, and Cida/ris, with their detached spines, and any quantity of 

 shells and fragments of Inocerami; the last-named, together with 

 Rhynchonellce, are very abundant in the detached blocks at the foot 

 of the cliffs near the Coast-guard Houses. 



Besides the Chalk, we have here the Upper Greensand, Gault, and 

 Lower Greensand. The strata, as you would observe better in going 

 along the Lower Sandgate Koad, are not horizontal, but inclined at a 

 small angle and dip to the east, cropping up, you will notice, from 

 beneath the superincumbent formations as you go westward. Very 

 litLle, indeed, of the Ux)per Greensand is to be seen ; there are a few 



