402 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 5, 



flint, and it makes the top of the slope, or lower part of the cliif, a good 

 example of the form called " wall above slope " by Mr. Buskin *. 



Prom the western side of Freshwater Bay a good view may be 

 had of the cUiFs to the east, showing all the beds from the Chalk- 

 with-flints down to the Wealden. The diagram, fig. 2, is from a 

 rough sketch taken from the foot of the cliff. 



Fig. 2. — View of the Cliff's eastward of Freshwater Bay. 



a. Chalk with flints. e. Gault. 



h. Chalk without flints, bedded. f. Lower Greensand. 



c. Chalk-marl, more thinly bedded. r. Chalk Downs. 



d. Upper Greensand. 



In the higher part of a the bands of flints are frequent and 

 regular, but towards the bottom they are less common and less con- 

 tinuous, and the chalk has a somewhat nodular look ; at the bottom 

 there is a layer of yellowish nodules, which I have been led to think 

 is the representative of the bed, more distinct elsewhere, which I 

 have named " Chalk- rock " f. The nodules are, like those of that 

 bed, of irregular shapes and sometimes green-coated, and they occur 

 here and in other places in the island (hereinafter noticed) in the 

 same position as the Chalk-rock, that is, at the junction of the Chalk- 

 with-flints and the Chalk- without-flints. In this section that junc- 

 tion is hard to get at on the top of the cliff, but the nodules may be 

 seen in fallen blocks at the foot. The hard Chalk-marl, and the 

 still harder Upper Greensand, stretch out as a foreshore for some 

 way westward of their outcrop in the chff, their even bedding being 

 clearly shown by close parallel ridges. 



A chalk-pit at the south-eastern corner of Shalcombe Down gives 

 the following section ; — 



Chalk, much split up by weathering. 



Line of blackish clay. 



Hard and more massive chalk, 7 or 8 feet. 



Hard cream-coloured bed, 8 or 10 inches. This I take to be 

 the Chalk -rock ; green-coated nodules occur at the top, which 

 is well marked, whilst it passes down into 



Chalk, without flints, but with two layers of soft grey marl. 

 A like section is shown by the pit, marked on the Geological Sur- 

 vey Map, on the southern side of Mottestone Down and due north of 

 the village : — 



Chalk, split up or weathered to a rough surface. 



* ' Modern Painters,' vol. iv. p. 151. 



t Quart. Joiu^n. Geol. Soc. vol. xvii. p. 166. 



I 



