W. WHITAKER ON SOME BORINGS IN KENT. 35 



account of the Chalk, as found in a well near hy, may be seen in 

 the Memoir on the London Basin *. 



The amount of Gault seems to be in excess of that in the borings 

 at and near Chatham. 



6. CJiartham, South of Canterhwy, Kent Asylum. 1874. 



From a tracing communicated by Mr. J. Giles. 



254 feet above the level of the Stour. 



Shaft 261 feet, with two headings of 100 feet in length, at 257 

 feet, the rest bored. 



First water-level 231 feet down. Present water-level (? October, 

 1874) 238 feet down. 



Thickness Depth 



in feet. in feet. 



(^White chalk with beds of flints 261 261 



Soft chalk with flints 51 312 



I Black sticky chalk with flints 8 320 



White chalk with few flints 53 373 



I Hard rockv chalk with veins of pyrites ... 11 384 



Hard chalk with flints 16 400 



p,, ,, , j Light-coloured chalk with few flints GO 460 



^4 It^ "^ -^^''^ ^''®^' ^^^^^ ^'^^^ ^®^^ ^^ ^^°^® ^^ ^^'^ 



' ®® ■ I Dark sticky chalk, hard in places [a spe- 



I cimen from a depth of 607 feet is clayey 



I chalk, rather dark ; another from 731 



I feet, is chalk marl, with green grains ; 



and another, from 732 feet, is the same, 



I with more green grains] 230 734 



l^ Dark sand [base of Chalk Marl] f 



Gault clay [specimens grey and calcareous ?] of 740 



Although this section, which has been in my hands for some years, 

 does not show the whole thickness of the Chalk in East Kent (not 

 beginning at the top of the formation), yet it marks the position of 

 the base. 



7. Dover. Convict Prison^ East Cliff. 1885. 



Made and communicated by Mr. R. D. Batchelor. Also from 

 information and specimens from the Home Office. 



180 feet above the level of the sea. 



Shaft 315 feet, with headings at the bottom ; the rest bored. 



Water found at 315 feet, in headings, to the extent of 18,000 

 gallons a day. 



* Geol. Survey Memoirs, vol. iv. pp. 463, 464 (1872). 



d2 



