424 
CLARK : GLACIAL SECTIONS. 
new engine-house was erected at the Water Works. Warpy 
clays were first met, the dark clay being separated by sand so mi- 
caceous that it shone like silver ; then came a dark clay full of 
plant roots to a depth of 20 feet, whilst even to 50 feet there 
was nothing of distinctly glacial origin. One of the borings, 
beginning 20 feet above the river's summer level, gave as 
follows : — 
Feet. 
Clay, of various qualities, but always 2 feet of 
blue at the base ... ... ... ... ... 22 
Sand (varying up to 15| feet at one boring) ... 8 
Clay, free of stone 20 
Sand 11 
Loamy clay 2 
Total ... 63 
This great depth of apparently fluviatile deposit is strik- 
ing from the close proximity of true boulder clays, which rise 
to the surface about 80 yards off. At this point it will be 
noticed the Ouse bends sharply where, comparing York mole-mills 
to mountains, it meets the outlying spur of Severn's mount, cut 
by the river at Clifton Scope. 
A quarter of a mile to the north, at the Harrogate Junction, 
the railway enters a cutting 15 to 20 feet deep, where the glacial 
beds are still fairly exposed. They are sandy and gravelly, 
large boulders are scarce, but ice-scratched pebbles abound. The 
junction of the brick-clays with these beds occurs a yard or two 
S. of the signal box. It is, however, exceedingly obscure, even 
when best exposed. J ust N. of the box the brick-clays rest on 
the sandy glacial beds, which are semistratified, dipping 1 in 
8 or 9 to the S. Between the Harrogate and North line a larg'e 
space has been cleared, leaving at the end a slope 200 feet long 
and 20 feet high, facing south. The east part had the same semi- 
stratified sandy clays — rearranged glacial beds — in which, at this 
point, no scratched pebbles were found. An irregular, nearly 
