130 



GEOLOaY OF TnE ISLE OF WIGHT. 



Lower Head on 

 Beds, 

 m h. 



t»< 



I 



L 



fSand, clay, and lij^nite; with 

 I bands full of bivalves and scat- 

 I tered univalves. Cyrena 



obovata, Cerithium ventricosum, 

 C. concavum, C. pseudo-cinctum, 

 Neritina concava, Melanopsis 

 fusiformis ... 



Cream-coloured limestone in one bed. 

 Limncea longiscaia, Planorbis euom- 

 phalus, P. lens ? This corresponds 

 Avith the limestone of How Ledge 

 Sand, clay, and lignite, with seeds. At 

 the bottom 2 feet 9 inches of strong 

 carbonaceous bands with seeds and 

 univalves. Carpolithes, Melania 



Limestone with shells (much broken) 

 ])robably brackish water ? himncBa 

 longiscata, Nematura - - - 



Green clays ; fossils few or none 



Zones of lignite and sand 



Ferruginous bands, alternating with 

 clays full of Paludina 



Pale sands with bands of lignite 



Cyrena pulchka Bed. — Green clays, 

 carbonaceous at the base. Cyrena 

 pulchra, Potamomya, Limncea 



Limestone, very shelly in the middle, 

 and divided into two beds by a clayey 

 parting. Limncea longiscata, L. cm- 

 data, Planorbis euomphalus, fragments 

 of Paludina - - . - 



<^ Green clays with purplish streaks (from 

 this clay to the base of the Headon 

 Series the beds vary very much at 

 different places; . - . 



Sandy limestone, very shelly and ferru- 

 ginous at the base. Shells crushed - 



White and yellow sand, with a car- 

 bonaceous band at the top 



*Blue clay with shells ; becomes sandy 

 below. Potamomya, Cerithium 



Sandy limestone, passing upwards into 

 sand. Planorbis euomphalus, Limncea 

 longiscata (shells much broken) 



Strong band of ironstone 2 inches to 



Cyrena cycladiformis Bed. — Sandy 

 green clays, Potamomya, Cyrena 

 cycladiformis, Cerithium elegans, C. 

 duplex .... 



White sands with harder bands - 



Green clays with a thin ferruginous 

 band 1 inch thick at the base. No 

 fossils? - - . . 



Ft. In. 



L 



Total 



fBright yellow sands, with white sand, 



Headon Hill Sands •( forming lenticular patches in yellow 



[ sand - - - - - 



10 



3 



20 



6 



5 4 



1 4 

 G 

 4 

 4 fi 



1 C 

 4 



3 

 1 (i 



6 



146 10 



11 



Another Section measured downwards from the beds marked 

 (*), nearer Alum Bay, i? slightly different. 



