LOWER GREENSAND. 



21 



Fitton, 1845. 

 (Atherfield.) 



XIV. Ferruginous beds of 



Blackgang Chine 

 XIII. Sands of Walpen 

 Undercliff - 

 XII. Foliated clay and sand 

 XI. Cliff-end sands 

 X. Second Gryph^ea bed - 

 IX. Walpen and Ladder 

 sands 

 VIII. Upper Crioceras group 

 VII. Walpen clay and sands 

 VI. Lower Crioceras group 



V, Scaphites group 

 IV. Lower Gryphsea bed - 

 III. The Crackers - 

 II. The Atherfield Clay - 

 I. Perna Mulleti bed 



Geological 



Survey, 1887. 



(Isle of" Wight.) 



Geological 

 Survey. 

 (S.E. England.) 



^D 



> 



Ferruginous 

 Sands. 



r Sandgate 



\Beds. 

 Hythe Beds. 



CJ 



B\ Atherfield 

 A J Clay. 



Atherfield 

 Clay. 



These divisions pass one up into the other, without any sharp 

 line of demarcation, except in the case of the Sand-rock Series 

 and the Carstone. Here the boundary is rather more sharply 

 defined, and can be followed with little difficulty through the 

 central parts of the Island. The Carstone everywhere passes up 

 into the Gault. 



In descrlblno; the Lower Greeusand it will be convenient to take 

 the localities in order from west to east as before, commencing with 

 Compton Bay. 



CoMPTON Bay. 



The base of the Lower Greensand in Compton Bay is not seen 

 in situ in consequence of a great slip of Atherfield Clay and of 

 the upper Weal den beds described on p. 8. It is not difficult, 

 however, to find among the ruins masses which show the junction 

 as clearly as if it Avere in place. The following details were noted 

 in a fallen mass : — 



Ft. In. 



Atherfield Clay 

 Perna Bed 



Wealden Shales 



■ Clay, mottled red and grey. 



{Calcareous and ferruginous 

 grit, with Modiola, &c. 

 Green sandy clay 

 - Blue paper-shale, broken up 

 into a breccia for a distance 

 of about 1 foot below the 

 base of the Lower Green- 

 sand _ - - 



-f 



