476 On the Anticlinal Line of the London and Hampshire Basins, 



catastrophe we contemplate, only skimmed over by a scanty 

 herbage), or walk round the slopes of Hind Head, and look down 

 into the combs and gullies below, without having his mind filled 

 with images of the mighty flux and reflux, that not very long 

 ago (speaking in geological epoch) scooped out these valleys and 

 modeled the picturesque and remarkable scene before him. 



I have not time to do more than notice the account of Mr. 

 Mackie's bone-bed at Folkstone, in the last Number of the 

 Journal of the Geological Society. It is a specimen, and within 

 the range, of my subcretaceous zone of drift, into which a few 

 pebbles of the lowest tertiary have strayed. Much loam and brick 

 earth seem to enter into the composition of this bed, and make 

 it, as in the bottom of the Peasemarsh gravel, more than usually 

 preservative of diluvial bones. 



The same Number of the Journal contains Mr. PrestwicVs 

 description of, and speculation on, the cliff's and diluvial beds of 

 Sangatte. That deposits of this sort on the chalk confines of 

 the Boulogne denudation should correspond with those we find 

 at Dover, Foljcstone and Brighton, on the flanks of the Weald, 

 on this side of the Channel, is only just what might be expected. 

 It is probable that an examination of the French coast, south 

 and west of the Somme, where the chalk sinks again under the 

 tertiary beds, would aff'ord the same intermixture of drift and 

 the same transition from the angular and fractured flint of the 

 '' cretaceous " into the pebbly, sandy and loamy debris of the 

 '^ tertiary drift zone '' of the foregoing memoir. It cannot have 

 escaped Mr. Prestwich's notice, that his ancient chalk cliff* of the 

 pre-eocene, or earliest tertiaiy shingle-bed at Sangatte, exactly 

 corresponds with the sectional view given by Dr. Mantell in his 

 Geology of the S.E. of England, of the ancient cliff" and beach, 

 with the superincumbent mingled drift materials in the cliff's 

 between Kemp-town and Rottingdean; — all of which appearances 

 are there still visible. 



I have spoken cursorily of the diluvial deposits of the London 

 basin and the eastern counties, the rolled clays and the heteroge- 

 neous admixtures of the Cromer Cliff's, and other phajnomena 

 indicative of the marginal relations of the massif of trans- 

 ported materials at the bottom of the German Ocean. It is not 

 necessary to be reminded of the mammalian bones which are 

 occasionally fished up at Harwich, and along all that line of 

 coast, to be assured of the identity of the several bone-beds of 

 Brighton, Folkstone, Cromer, the chesil-bed of Portland*, the 

 elephant-bed at Peppering near Arundel f, the gravel-pits near 



* Vide Dr. Buckland and Sir H. de la Beche, loc. cit. 

 t ManteU's Geol. of S.E. of England. 



