Essex Well-Sections. 
155 
[London Clay, 
4f ft.] 
[Reading Beds, 
64i ft., 
the bottom 
4f ft. may be 
Thanet Beds.] 
Thickness. 
[ Sand and loam . 2 
j Brown clay . 1 ... 
[Blue clay. If ... 
'Light [-coloured] sand ...... 3f ... 
Coloured [mottled] clay ... 7 ... 
Light [-coloured] sand . 5 ... 
Grey sand, with w T ater . f ... 
Light [-coloured] sand. 4 ... 
Grey sand, with water . 5* ... 
Blue clay. If ... 
Green sand . 4f ... 
Blue clay . If ... 
- Hard grey sand . f ... 
Hard green sand. 2 ... 
Blue clay. * ... 
Hard green sand. 
Blue clay. 16 
Brown loamy clay. 6f 
Dark loamy sand . f 
Dark grey sand, with water 21 
Blue sandy clay . 
Flints. 
To Chalk. 
H 
Depth. 
14 
15 
16f 
20 * 
274 
82* 
33 
37 
424 
43f 
48 
494 
50 
52 
52* 
54 
70 
76f 
77f 
80 
80* 
81* 
Perhaps the top bed of sand may be the basement-bed of 
the London Clay. 
Dunton. — S.E. of Brentwood; Mr. Willoughby's. 
Dr. J. Mitchell’s MSS., vol. iii., p. 76. 
100 feet dug ; bored 344 feet. 
Water rose within 77 feet of the surface ; contains sulphate 
of magnesia. 
[London Clay.] 
Yellow clay . 
Blue clay, with selenite, pyrites, 
and wood . 
25 
319 
To “water-rock” 
354 
Epping Waterworks. —Section noted in Geological Survey 
Memoirs , vol. iv., p. 434. 
Another account, communicated by Messrs. Easton and 
Anderson, from particulars got from Messrs. Buss and Minns, 
is as follows :— 
Shaft 225 feet; the rest bored. 
Water-level 210 feet down. 
