132
PROCEEDINGS OF THE GEOLOGICAL SOCIETY. .Jan. 20,
side of the valley, the drift ascends in
terraces up to the flanks of the New Red
Sandstone and Permian hills which ulti-
mately bound it on each side.
In addition to the drift in the imme-
diate neighbourhood of the river, nume-
rous outlying patches occur on the high
ground, as at Ryden Hill, in the parish
of Benthall, and near the " Hill Top,"
Benthall, Broseley Churchyard, Posen-
hall, near the Deerleap, and Willey, and
near Much Wenlock on the west side of
the Severn

also in several localities on
the east side, at altitudes of from 300 to
600 feet above the Severn, and from 400
to 700 feet above the sea. Mr. C. J.
Cooper, Secretary of the Severn -Valley
Field-Club, to whom I am indebted for
much information relating to the Bridg-
north gravels, has also pointed out to me
a patch of drift at Burton, 3^- miles to
the west of Much Wenlock, and 800 feet
above the sea-level. To this I shall pre-
sently more particularly refer.
The principal mass of drift occurs at
Stre thill, a rounded hill rising, close to
the north of the entrance of Coalbrook
Dale, to an altitude of about 200 feet
above the River Severn, and 300 feet
above the sea. The section of its upper
portion has, for several years, been ex-
posed in a gravel-pit on its north-east
side, and the Coalbrook Dale Junction
Railway has recently exposed a further
section through its centre, which, toge-
ther with some less important sections
on the west side of the river, afford the
unusual opportunity of examining 200
feet of consecutive drift- strata. The
sections across the valley of the Severn
will explain the relative position of the
several masses of drift, and their relation
in position to older formations.
The base and summit of Strethill con-
sist of clear water-worn sands and
gravels, separated b3^ a bed of gravelly
clay

the first 60 feet above the river
consists of thick beds of remarkably clean
sea-sand, interstratified with water- worn
pebble-beds, which are exposed for a
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