70 GEOLOGY OF IHE ISLE OF WIGHT. 



Quarry on the north Side of Grcatwood Copse. 

 Cliert, rag, and sand (top not seen) - - - . 



liaff 



Firestone -----_. 



Hag ........ 



Firestone .-.-_.. 



Rag 



Rubstone ----... 



Freestone -.---._ 

 Rag- ....... 



Inferior stone or malm . - . . . 



Rag 



Inferior stone -..__. 



3. Culver Cliff. 



In this section the layers of chert, so conspicuous near Ventnor, 

 are represented by a few lenticular masses only, or by layers of a 

 hard flinty stone. The freestone also can no longer be distin- 

 guished, and the whole group shows a loss in thickness of 1.8 feet. 



Culver Cliff. 



Ft, In. 

 Chloritic Marl (see p. 81), 

 Chert Beds r Green sand with lenticular masses of black 

 and \ chert at 9-11 feet from the top, and some 



Malm Rock. L bands of hard gre}'- stone . - - 80 



Gault - Passage Beds (see p, 64). 



Inland Sections. 



1, Along the Central Downs. 



Although numerous inland sections lay open the Upper Green- 

 sand, the whole subdivision is rarely exposed at one spot. An 

 exception occurs in the road-cutting north of Brook, where the 

 following beds are seen : — 



Road-cutting three-quarters of a mile north of Brook Church. 



Ft. In. 



{Alternations of chalk and marl (top not seen), 

 passing down - - _ - 



Rocky chalk, very impure, and with glauco- 

 nite, passing down . . - - 



rhl 'f \T 1 r ^^^^^ ^^^^ "^^t^ phosphatised Ammonites, &c. 

 yi f f. f -^ y, ' ] irregularly hardened into stone in the upper 

 ^^ "^ ■ L part .--..- 



IT \ -inf ^^Jc . ^ 1^' Y Cherty lumps in sand 



Upper IQieet 6 inches. J •' '^ 



Greensandj <( M 1 "R V f Greenish sand with great len- 



107 feet. I ■" or r. , ' -I ticular and oval masses of 



L ^^f^^*- I rock - - - 85 



Gault - Passage Beds, not clearly seen. 



The Chert Beds are seen in a by-road above Dunsbury, and 

 make a small but well-marked escarpment for about 600 yards 

 westwards. The next exposure occurs in the road from Brixton 



