458 HAWKESWORTH : SOME DRIFT DEPOSITS XEAR LEEDS. 
and between the 200 and 225 feet contours, (see C on map). 
At present it shows : — 
Very coarse gravel or shingle . . 2-3 feet 
Sand . . . . . . . . . . about 15 feet 
Very coarse gravel . . . . . . 10-12 feet 
Sand . . . . . . . . . . about 1 foot 
Rough gravel, with large boulders, thickness not known. 
It may be possible before very long to obtain a view of the whole 
thickness of the deposit, and the ch.aracter of the rock floor 
upon which it is laid. A few lenticular masses of clay occur 
in the sand, at times, but, at the south end of the pit, resting 
on rough gravel, a large mass of very line stiff reddisli clay 
w^as found, 2-3 feet thick in places. It was quite free from 
grains or pebbles of harder rock, and much of it was carted 
away for the purpose of puddling the adjacent reservoir. Above 
the clay was more coarse gravel. 
About 300 yards east of the above section, tlie E. & W.Y.U. 
railway runs for some distance in a deep cutting through sand- 
stone (Thornhill Rock). (See D on map.) This is overlaid 
by 10-20 feet of sands and gravels, which, though not very 
accessible, and now somewhat obscured, seem to be quite as 
variable in texture as in the other sections. Thej^ rest ap- 
parently on a fiat surface of the sandstone, and it can be seen 
clearly how tliej^ cap the ridge dividing the Aire and RothweU 
vallej^s. Running south, across the head of a small valley or 
deprcFsion, the railway cuts through a smaller thickness of the 
gravels. 
Oulton patch. — Crossing the Rothwell valley, and passing 
through the ancient village of that name, the northern extremity 
of the Oulton patch is seen making a prominent feature in the 
landscape (Gravel Pit Wood, but no exposure now). About 
three-quarters of a mile south, near Roj'ds Green, it attains 
its greatest elevation, 275 feet, this contour being formed roughly 
by a terrace-like spread of gravel. From here the ground gradu- 
ally slopes away to the Calder valley. 
So far as can be ascertained, the only section now visible 
is in a gravel pit near the Home Farm. Oulton, just above the 
