Essex Well-Sections. 
159 
Thickness. Depth. 
[Gault.] Chalk [? whitish calcareous clay] 
4| feet. [Specimens of Gault clay from 
950 feet clown. At the bottom some 
pieces of phosphatic nodules, such as about 
occur at the base of the Gault] . 172 ? ... 1100 
An account from Mr. T. Tilley, who bored the lowest part 
of the well, is as follows:— 
Thickness. Depth. 
To bottom of grey chalk. 894 ... 894 
(Green sand and brown 
loam. 8 ... 902 
Green sand . 8 ... 910 
[Upper 
qo lf l ’ I Grey chalk [? calcareous 
‘J sandstone] . 4 
j,Green sand . 10 
r Grey chalk [? calcareous 
[Gault.] 
whitish clay] . 31 
Gault (not bottomed). 
914 
924 
955 
This boring, one of the deepest in the London Basin, is 
the second in Essex that, after passing through the Tertiary 
beds, has pierced the Chalk, the Upper Greensand, and tbe 
Gault, the other being at Harwich. See ‘ The Geology of 
the Eastern end of Essex (Walton Naze and Harwich).’ 
Maldon. — Warren’s Foundry, near the Railway Station. 
Information from Mr. Hatley (to Mr. Dalton). 
Gravel . 21 
London Clay . 130 
To sand. 151 
Maldon (Heybridge). — Bentail’s Nut and Bolt Factory. 
1872. 
Information got by Mr. W. H. Dalton from Mr. Barham, 
well-sinker, and from specimens. 
Shaft, 75 feet; the rest bored. 
Maiden spring 90 feet down. 
Thickness. 
[Valley] gravel. 9 
Clay . 105 
Sandstone. over 1 
[Basement- 
bed] 
[London Clay.] - 
Sand [I saw broken 
shells in some of 
this] . 
11 
Depth. 
... 9 
... 114 
... 115 
126 
2 [Some of this sand may belong to the Beading Beds. The shells 
were decidedly from tl:e “ basement-bed.”] 
