File:The Quarterly journal of the Geological Society of London (12961265145).jpg

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PKOCEEDIKGS OF THE GEOLOGICAL SOCIETY.
deposit is met with, the position of which, however, is essentially
different from that found at Broomhill. From a careful survey which
Plan of Gravel Hill, Brandon.
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+ Gravel-pits. — Height 90-62 feet, from A to B, taken from the level of the
river. Distance from the river 78 chains.
I have lately made it is found to be 91 feet above the river, and very
nearly a mile distant from it at the nearest point ; it comprises an
area of from thirty to forty acres, occupying the summit of a hill
overlooking an extensive sandy plain, which at a short distance
merges in the great level of the fens. The bed of gravel here is
usually not more than 10 feet in thickness, and often less, resting im-
mediately upon the chalk ; and, as at Broomhill, the implements are
usually found at the bottom of it, and occasionally they lie upon the
chalk. As regards its composition, however, no less than its position,
this gravel differs greatly from that found at Brandon; the nodules
of flint are not so large, there is very httle of the broken chalk, and
the mass of the overlying sand is much less.
By far the larger proportion (perhaps three-fourths of the whole
mass of gravel) consists of rounded quartzites, and a few jasper-
pebbles, while at Broomhill the proportion of these is hardly a
thirtieth part of the whole. In some spots, indeed, these pebbles
form a compact mass with hardly a single flint ; and under one
of these, at a depth of 6 feet, I procured a very well-shaped implement.
The implements here are not generally stained of so deep a colour as
those at Broomhill; and while many of them are of very coarse
workmanship, and much worn and broken, others are of excellent
forms, and as sharp and fresh as when flrst made,
LaJcenheath. — The next deposit which I have examined is at Laken-
heath, Suffolk, distant three miles from the left bank of the river.
It is found on some high ground known as the Broom, between
Lakenheath and Eriswell, and is at about the same height above the
river, and of the same character as that at Gravel Hill, from which it
is separated only by a shallow valley. These hills are only two