400 WALTON : SOME NEW SECTIONS IN THE HESSLE GRAVELS. 
are at the bottom of a well twenty feet deep, are respectively one 
hundred and twelve and one hundred and fifteen feet deep, and are 
entirely in Chalk, and supply about seventy thousand gallons of 
water per hour. It must be remembered that about thirty feet of 
sand, gravel and clay have been removed in making this cutting. A 
considerable thickness of sand can be seen in the cutting at the 
present time. 
The new sections in the gravels are situated between Southfield 
and the Ferriby Road, and bounded on the west by Wold Field Lane. 
The sections are artificial ones, and have been dug for the purpose of 
getting sand and gravel. The largest of them is in the field just 
north of the houses in Southfield, and, together with several trial 
pits, forms an almost continuous section along the line marked AB on 
the map ; reaching from the seventy-five feet contour at the east end 
to a height of about ninety feet above sea-level, in a direction from 
W.S.W. to E.N.E., another large pit is situated on the north side of 
the field adjoining, and just south of the corner of the Town's Pit on 
the Ferriby Road. The southern of these pits, the largest, is an 
oblong excavation measuring one hundred and fifteen feet by seventy 
feet, and is dug out to a depth of twenty-five to thirty feet. At the 
eastern end a bore was made for another twelve or thirteen feet, 
without reaching the solid Chalk. This gives a proved thickness of 
at least thirty-seven feet for the gravels, not taking into account the 
boulder clay covering it. The northern pit measures ninety-six by 
sixty-three feet, and is dug to a depth of about twenty feet. These 
pits exhibit a general succession of sand and gravel roughly strati- 
fied, the sand being the lowest, the whole being overlaid by boulder 
clay. The lines of gravel, etc., can be traced easily along the whole 
length of the pit. The west end of the large pit shows the following 
section : — Feet. 
Boulder Clay ... .. ... ... 4 
Sand with only a little Gravel ... ... 12 
Gravel and Sand mixed ... ... ... 7 
23 
This section shows a large preponderance of sand over the 
gravel. These sands dip in the direction of N. 55° E., at a consider- 
