4:40 DE RANGE : BOKINGS FOR WATER AND SALT IN COUNTY YORK. 
flows the surface at the rate of li minion gallons per 24 hours. The 
level does not vary, but after heavy rains the (quantity increases : — 
Ft. In. 
Ft. 
In. 
/Clay and Soil 
9 
Q 
6 
Light Compact Rock 
9 
0 
Gravel 
1 7 
U 
Hard Rock 
34 
6 
Clay 
9 
Q 
J 
Black Coloured Hard 
Sand and Gravel 
0 
9 
itOCK 
y 
0 
Marl 
1 
0 
Open Rock, with hard 
Sand and Gravel 
2 
9 
binds 
1 Q 
U 
Marl 
8 
6 
Hard Rock ... 
94 
0 
feaiid with xJoulders ... 
4 
9 
Soft or Shaly Rock . . . 
8 
0 
vjiavci ... ... 
3 
0 
Hard Rock ... 
86 
0 
Warp . . 
^ Brown Marl ... 
5 
9 
Rock, strong bind 
4 
5 
5 
3 
Close Rock, mixed with 
Shale and Sand . . . 
14 
6 
Kimmeridge Clay 
Rock 
44 
21 
3 
0 
Blue Shaly Clay 
16 
6 
Very Hard Rock 
2') 
6 
Total 439 
6 
Beneath the C/ialk ot 
Y 
)rkshire the underlying strata have 
been uplifted by a gentle anticlinal, from which the beds northwards 
and southwards, the summit of this anticlinal axis has been trun- 
cated and denuded, before the deposition of the chalk, which rests 
upon the Kimmeridge Clay at Sherburn and the Lias at Huggate, 
where the upper beds of the Lias were penetrated by a deep well. 
At Bridlington Quay occurred the following section : — 
Brown Boulder Clay . ... ... 28 ft. 
Hard Conglomerate, Flints and Chalk ... ... 15 „ 
Chalk (x) 
An artesian supply of good water was obtained, which ebbed and 
flowed with the tide. Drift. 
Professor Phillips [Geology of Yorkshire, p. 280, Part. 1] long 
since pointed out tliat glacial drift fills up an old sea- loch at the 
Vale of Pickering, and which contain a water-bearing gravel under- 
lying Boulder Clay varying from 30 to 55 feet in thickness. Many 
artesian borings have been made, the deepest being that at Yedding- 
ham, in the middle of the Vale; they vaiy from 68 to 95 feet in 
depth, and the water rises by artesian pressure from 5 to 20 feet 
above the surface of the ground. 
