114 



THE WONDERS OF GEOLOGY. Lect. I. 



similar to those made in the chalk-rock by the recent 

 pholades and mytili. 



These strata, which must have been deposited beneath 

 the waves, now constitute a line of lofty cliffs, extending for 

 miles along the sea-coast. The annexed diagram (Lign. 15) 



The Sea. 

 South. e ; — North. 



Lign.15. — Elevated strata and beach at Brighton, east of Kemp Town. 



A, Elephant bed ; B, Ancient bed of shingle; C, the Chalk; D, Terrace of Chalk 

 beneath the ancient sea-beach. 



represents a vertical section, as seen in those places where 

 the inroads of the sea have extended to the chalk strata, and 

 the face of the ancient cliff is exposed, the newer deposits 

 being shown in profile from south to north ; these consist 

 of the following : — 



1. (a), Chalk rubble, loam, &c, obscurely stratified ; this deposit, 



from its containing many teeth and bones of elephants, I 

 have named the Elephant bed ; it constitutes the upper three- 

 fourths of the cliffs. 



2. (b), Shingle, or sea beach and sand, several feet above high-water 



mark. This ancient shingle, which from the inroads of the sea 

 extends in the cliffs beyond Kemp Town but a short distance 

 inland, is constantly found beneath the loam and clay, several 

 hundred yards north of the shore, in the western part of 

 Brighton. In wells sunk in the Western road, the shingle bed 

 was reached at (lie depth of fifty-four feet. 



