198 GEOLOGY OF THE ISLE OF WIGHT. 



Series, there is nothing characteristic among its fossils. Another 

 section of the beds beneath the gravel was exposed in the new- 

 well at the West Cowes waterworks, which apparently penetrated 

 about 30 feet of Hamstead Beds, including a shaly carbonaceous 

 clay like the Black Band ; but unfortunately few samples were 

 preserved from the upper part of this well. 



Descending towards the Medina Ave find another Brickyard at 

 Werror. In this the junction of the Hamstead and Bembridge 

 Beds is apparently shov/n. Above a black seam were found 

 Melanin turritisslma, M. Forbesii, Melanopsis, Paludina lenta. 

 Fish bones, and Folliculites thalictroides with other seeds, but the 

 strata are so weathered that it is not easy to obtain details of the 

 section, and it is possible that this black seam may be somewhat 

 higher than the Black Band. 



Beyond this point the base o£ the Hamstead Series sinks 

 beneath the sea level, and a boring (B.H. 97) a few hundred 

 yards farther south showed carbonaceous clays full of Nematura 

 pupa, Falndina, and Melanopsis, probably the Ncvxaturapupa bed. 



At the West Medina Cement Works the Nematura pupa bed 

 re-appears at the sea-level near Dickson's Copse, but in the pit 

 close to the Kilns it is nearly 10 feet lower. A good section may 

 be seen at the latter place ; and by means of boring (B.H. 93) 

 it was carried 10 feet below the bottom of the pit and 8 feet 

 below high-water level. It shows: — 



Feet. 



Blue and yellow clay, with faint red mottling in the upper part ; no 

 moUusca observed. Turtle bones. (Seen in the pit) - - 25 



Soft greenish clay (in B. H.) - - - " . " ^ 



Soft light-blue and yellow loams, with sand partings and selenite. 

 Decayed Gyrena at 6 feet ; Entomostraca from 7 to 7^ feet - 7 



Lead -coloured, dark-grey, or black laminated clay, full of shells 

 between \\\ and 12^ 'feet. Nematura pupa, Hydrobia Chasteli, 

 Neritina tristis, Melania muricata, Cyrena semistriata • - 2\ 



Green loam, with sandy partings . - - - - J 



38 



The carbonaceous clays were at first taken to represent the 

 Black Band, but there is now little doubt that they are really 20 or 

 30 feet higher in the series. 



South of Medina Cottage clays with Melania muricata and 

 Melanopsis carinata are seen at several places in the river bank. 

 They are the beds immediately above the lowei Nematura bed, 

 for a boring (B.H. 95) at the western end of \\\e Mill Pond 

 shows the succession : — 



Soil - - - - - 



Free-cutting loam, with much selenite . - - - 



Darker blue stiff clays. Melania muricata, Melanopsis subulata, 



Paludina ...---- 



Seam of black clay ...... 



Green and blue clay, with sandy partings and some carbonaceous 



matter. Nematura pupa, inflated var. at 11 feet 

 Blacker shaly clay ...... 



Green clay, with sand partings . - - - . 



16 



