W. WHITAKER-HERTS WELL-SECTION'S. 
179 
Waltham: Cross.— Theobald’s Square. Sunk and communicated 
by Mr. Gr. Ingold. Shaft 22 feet, the rest bored. Water, 
from the Chalk, rose to a height of 13 feet below the surface. 
Made earth 
[Valley Drift] 
[London Clay, 
35 feet] 
[Reading Beds 
61 £ feet] 
( Brown clay [brick-earth] . 
( Gravel, with much water . 
| Black [ F dark bluish-grey] clay 
\ [Basement-bed]Dark green clay with shells 
r Red and brown clay . 
Black and grey sandy clay . 
Grey sand. * . 
Light-green sand. 
Greenish-grey sand . 
’ ^ Green clay 
Grey sand. 
Black clay. 
Black clay with pebbles..- 
Dark sandy clay. 
I Layer of green-coated flints . 
Ft. Ins, 
7 0 
8 0 
11 0 
32 0 
3 0 
4 0 
1 6 
18 6 
3 0 
8 0 
1 0 
8 0 
2 0 
1 6 
14 0 
Chalk with flints 
To Chalk 122 6 
. 53 6 
176 0 
Ware.— For the New River Company. J. Barrow, Proo. S. Wales 
Inst. Png.,Yol. si, no. 7, p. 322, pis. 50, 51 ; and R. Etheridge, 
Pop. Sci. Rev., n.s., vol. iii, p. 279. Shaft 34 feet, the rest 
bored. 
Surface earth, and gravel and sand 
PLoiv f Soft chalk ..... . 
Chalk 1 Chalk Marl* . 
Upper Greensand * . 
Gault ..... . .. 
Lower Greensand [P May he base of Gault] 
Wenlock Shale [with calcareous layers, lenticular?, and fossili- 
ferous], dipping 40° southwards ? . 35 0 
831 6 
Ware.-— Little Eanhams Hall Farm, on the northern slope of valley, 
a mile south of Thundridge Church. 1878. About 197 feet 
above Ordnance Datum. Tube-well. Communicated by Mr. 
R. Gr. Austin, of Hertford. Water, from the Chalk, rose to 
about 72 feet from the surface. 
Ft. Ins. 
? Soil ..... 3 6 
Boulder clay with chalk particles . 28 6 
( Brown sand, with had water, which rose 
[Glacial Drift] < to the surface. 1 0 
I Hard clay and pebbles [? Boulder Clay] 12 6 
' Yellow gravel, coarse and loamy . 14 6 
To Chalk [carried over ] 60 0 
* Too great a thickness is here given to the Chalk Marl and to the Upper 
Greensand, under the former of which must he included some of the overlying 
Lower Chalk, whilst the latter in all likelihood is in great part Chalk Marl. 
Ft. Ins. 
14 0 
416 0 
128 0 
77 0 
160 0 
1 6 
