314 



GEOLOGY OF THE ISLE OF WIGHT. 



Osborne 

 Beds 103^ feet, 



Upper Headon 



Beds 



53h feet. 



Middle 

 Headon 



Beds 

 116 feet. 



f Red and green mottled clays 

 I Blue shell marl - . - 



I Green clay . - . 



<( Do. rather sandy - 

 Stone, and a little water - 

 Dark green and brown mottled clay 

 L Stone .... 

 'Mottled clay, with veins of sand 

 and a little water 

 Stone and a little water - 

 •^ Blue clay 



Stone and a little water 

 Blue clay (fragments of shell at 

 320 feet) 



(Sand with shells and water 

 (pumping from this spring dried 

 the well at Woodvale) - 

 Green sandy clay and blue clay, full 

 of Cyrena obovata and Melania 

 muricata at 331 feet ; green and 

 carbonaceous at 341 ; at 365 

 blue and very shelly, with 

 Cytherea incrassata, Cyrena, 

 sp., Natica lahellatu, Nematura 

 parvula, Buccinum lahiatum, 

 Fish otolith (Venus Bed); 

 at 375 green clay with Natica, 

 Cerithium &c. ; at 385 blue 

 shelly clay ; at 400 hard clay ; 

 at 414 green sandy clay full of 

 fossils (the following species 

 <;' were found in the spoil heap, 

 but the exact depth to which 

 they belong is uncertain, but lies 

 betwcHb 114 and 420 feet— 

 Ostrea ventilabrum, Cardita sim- 

 plex, Cytherea incrassata, Cyrena 

 obovata C. deperdita, Corbula 

 cuspidata, C. pisum, Gancellaria 

 elnngata, Buccinum labiatum, 

 Voluta geminata, Pleurotoma 

 plebia, Rostellaria, sp., Cer- 

 ithium elegans, Natica labellata, 

 Bulla, sp. (Brockenhurst 

 Bed?) 

 Grey shelly sand, Natica, Pleuro- 

 I toma, Nematura parvula, Plan- 

 1 orbis, Cyrena, Potamomya 

 LClay . . - . 



92 



14 

 3 



Ft. In. 



200 



230 



251 



251 6 



252 6 



266 6 



267 6 



288 6 



289 6 



292 6 



293 



321 



328 



420 



434 

 437 



An Analysis by Professor J. Attfield, F.R.S. (November 1887) of the 

 spring at 320 feet gave the following results :— 



Total suspended solid matter, dried at 250° F. - 

 Total dissolved solid matter, dried at 250° F. 



Ammonia " " " a\ " 



(Equal to ammonia per million TOO). 



Albumenoid organic matter, yielding 10 per cent, 

 of nitrogen - " •" o" 



(Equal to ammonia per million, 0-02). 



Jsitrites ---""" 



Grains per Gallon. 



None after subsidence. 



17-00 



0-07 



0-01 



None. 



