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9
at Cock Crow Hill within the Parish of Long Ditton.
The highest part of this ridge within our area is
118.6 feet.
Geology.—The greater part of the district is of
the Tertiary period embracing the Eocene strata of
London Clay. In the portion nearer the river
there are post.tertiary deposits of gravel and sand,
described in the geological survey as "Valley Brick
Earth." This extends from the line of the river up
to the railway and then stretches down the Clare.
mont Road to the Kingston Boundary Fossils
have been discovered occasionally, but not in any
quantity. In the clay there have been found round
stones or boulders with iron stained crystals and
deposits of crystalline gypsum
Number of Inhabited Houses.
At the 1921 Census the number of completed
buldings in the district containing dwellings was
4,112.
Twenty.three of these buildings were occupied
by " non.private families."
The remaining 4,089 buildings contained 4,255
structurally separate dwellings, 155 of which were
vacant (chiefly owing to the temporary absence of
the occupiers) when the Census was taken.
The remaining 4,100 structurally separate
dwellings were occupied by 4,767 private families
or separate occupiers