36 



GEOLOGY OF THE ISLJE OF WIGHT. 



FerruginousSands, J 

 about 367 ft. 6ins."^. 



Atherfield Clay, , 'S g 

 83 ft. 4 ins. "^ " " JT 



Dark-green or bluish clay and sand - 

 Ferruginous pebbly band with small phos- 



])hates and pebbles of iron oxide - 

 Soft yellow sand - . . . 



Dark clayey sand - . . - 



Pebbly band, containing many rolled phos- 



phatic casts of ammonites and bivalves 

 Pale-brown ferruginous sand . - - 



Pebbly band, with small quartzites and 



numerous flakes of iron oxide 

 Pale-brown sand with flakes of iron oxide 

 Brown pebbly grit with small quartzites and 



grains and flakes of iron oxide 

 Loose pale-green sand . . - 



Greenish grit with many wavy seams of iron 

 oxide . . . . . 



Brown and green gritty sand 

 Dark-green or nearly black clayey sand 

 Brown sand with flakes and grains of iron 

 oxide . - . . - 



Greensand, with a vivid green streak ; lines of 

 clay occasionally ; a layer of broken oysters 

 9 it. from the base. Forms a smooth 

 vertical wall .... 



Brown and reddish brown sandstone with 

 grains of iron oxide very abundant about 

 20 feet from the top ; forms the cliff on 

 which RedclifF Fort stands 

 Green sandy clay with wood and a line of 

 large nodules . . - . 



Fine and very clayey sand with wood ; lines 

 of nodules in the upper part, and veins of 

 iron oxide - - . - - 



Seam of brown iron oxide - - - 



Fine grey clayey sand ... 



Band of blood-red iron oxide 

 Fine grey clayey sand .... 



Fine white clayey sand _ . . 



'Pale-blue clay with pale-blue nodules, 

 weathering brown . . . 



rCalcareous and ferruginous grit with 

 1 many fossils, 1 ft. 6 ins. to - 

 Passing down into pale-blue sandy 

 clay with fossils . - - 



Impersistent grit, with scales and 

 bones of fish and phosphatic pebbles, 

 some of which are rolled ammonites 

 and bivalves ; about 

 Pale-blue sandy clay with fossils 



Ft. In. 

 1 





< 



[_Grit, as above 



G8 



GO 



// 



3 G 



It will be observed from this section that tlie thickening of the 

 Carstone, which was noted between Compton Bay and Bluckgang, 

 and still more between Blackgang and Shanklin, is still progressing 

 in an easterly direction. The Sand-rock Series and Ferriiginoiis 

 Sands on the contrary, as previously noted, thicken in a southerly 

 direction. In the series of comparative sections forming Plate HI. 

 these differences arc clearly presented. 



