so 



SOME ESSEX WELL-SECTIONS. 



Dovercourt. — Waterzvorks, Upper Dovercourt. 1882. 



Made and communicated by Messrs. Tilley. 



Thickness. 



Well, and biick-bottom (3 feet) — 



1 Sand and cla\' 7 



[London Clay.] \ Hard stone i. early i\ 



Clay S 



Plastic claj' 32 



[Reading Beds, 

 43^ feet.] 



[? Upper and iVIid- 

 dle Chalk.] 



Sand and water i 



Mottled clay o\er 9^ 



Green sand and flints i 



Chalk, with flints at 183, 203^, 



2I3J, 222^, 233, 249, 269}, 284^, 



315, 332^, 348I, 358i 364,3671, 

 over 419, 439| and at the base ... 352J 

 Hard chalk 62 



Depth, 

 30 

 37 

 39? 

 44i 

 76I 

 774 

 87 



440i 



Eastwood. — Southend Ji^afenvorks, N. IV. of Colemaiis Farm. 

 1890. 



Made and communicated by Messrs. Docwra. 



45 1 feet above Ordnance Datum. 



Cylinders and shaft 247 feet, the rest bored. 



Water-level, 9th August, 1889, 100 feet down ; 25th January, 

 1890, 66 feet 8 inches. 



Thickness. Depth. 



ft. in. ft. in. 



Soil 09... o 9 



fMixed clay, with an inch of fine 



I sand at the base 12 3 ... 13 o 



I Brick-earth, the bottom 3 inches 



[River Drift.] -^ mixed 12 9 ... 25 9 



I Gravel and sand 7 6 ... H 3 



I Sharp sand 5 8 ... 38 11 



l^White sand 3 7 ... 42 6 



[London Cla}', I London Clay 233 6 ... 271 o 



239^ feet.] I Sandy clay 6 o ... 282 o 



r Pebbles and pyrites i o ... 283 o 



f Blackheath Dead sand ,.. 10 o ... 293 o 



Beds, 18 feet.] i^^^'^'"^"^''"^'^ ^ ° - '94 o 



' ^ I Dark sand 4 g ... 298 9 



l^ Pebbles and sand I 3 ... 300 o 



[Hard dark sand 33 i ... 333 i 



I Green sand 25 2 ... 358 3 



[Woolwich and I Blue clay 23 o ... 381 3 



Thanet Beds, ■{ Dark sand 18 ... 399 3 



say 128 feet.] I Dark clay 27 8 ... 426 11 



I Chalk flints [partly belontr to 



!^ Thanet Beds] i (> ... 42S 5 



