90 GEOLOGICAL NOTES IN THE NEIGHBOURHOOD OF ONGAR.
At Stondon Massey there are very fine sections in gravel10
between Stondon Hall and the church. The gravel coats the hill
and is very thick, and consists largely of flint pebbles. There is also
a large proportion of subangular flints, and of small quartz pebbles,
half or one inch in length. Glacial erratics in the shape of quartzites
and quartz pebbles are common, and many are of large size. At the
lower end of the pits there was in 1890 a section 14 feet deep, showing
gravel with irregular sandy and clayey patches in places.
The gravel pit marked on the Geological Map, near Paslow Hall
Farm gave the following section :
1. Mottled red and blue clay with small stones, and here
and there irregular patches of small gravel=Boulder-
Clay.
2. Gravel of subangular flints, flint pebbles, black unworn
flints, quartz blocks up to 43/4 inches in length,
quartzites up to 61/2 inches in length=Glacial Gravel.
The gravel here is remarkably like that in the pit at Chiver's
Paun Manor House and at Stondon Massey already alluded to, that
is one reason why I believe they are all Glacial Gravel.
The Cripsey Brook has, as will be seen from the map, cut
through the Boulder-Clay and exposed the underlying Glacial
Gravel. I noted a series of sections along it, of which the following
are the details :—
Gravel Pit, five furlongs W. of Little Laver Church, 217
feet O.D. Three feet of gravel shown, composed of
flint pebbles, subangular flints, and quartz pebbles,
with many pebbles of quartzite. This gravel
is of the character of Glacial Gravel, the pit is
just below, east of, the patch of gravel which is
mapped Glacial Gravel in sheet 1, and Plateau
Gravel in sheet 47.
Moreton, three furlongs N. W. of the Church, small gravel
working by the roadside. 200 feet O.D. Gravel six
feet thick, composed of quartz, quartzite, flint
pebbles, and sub-angular flints. Mapped Glacial
Gravel.
Shelley, Gravel Pit north of Shelley Bridge. 175 feet
O.D.11
1. Earthy Bed with many stones.
10 Whitaker, op. cit., p. 314.—Professor Dawkins' and Mr, Bennett's notes.
11 Whitaker, op. cit. p. 314.—Professor Dawkins' notes.