NAZEING STAGE (PLEISTOCENE) 35
In addition to organic remains the sample, after washing,
yielded fine rounded quartz sand, and some sub-angular flint
sand.
From these considerations it is clear that the deposit can be
correlated both lithologically and palaeontologically with the
"marl D" of the Nazeing Stage. It was followed by a peat,
the base of which was under water, and which included a hori-
zon in which hazel nuts were common. This appears to rep-
resent part or all of the Boreal-Atlantic series of peats which
followed the Nazeing Stage. It should be noted that this peat
is localized within the channel occupied by the marl of the
Nazeing Stage and does not spread over the whole flood plain.
Thus the evidence of the Fishers Green pit is that deposits
of the Nazeing Stage are present but that they differ from
those of the type area in two respects :—
1. The "marl D" of this area was not deposited over a wide
part of the Lea Valley in a "mere" but was formed in a
clearly localized channel.
2. There is no evidence at the time of writing of deposits of
the "M" type, cutting into or otherwise associated with
the "marl D". It may be that such deposits will be found
as work in the pit progresses eastwards.*
In January, 1957, the excavation for the new flood channel
north of Forest Road, Walthamstow, [Nat. Grid Ref.
51/355895] yielded evidence of a sequence similar to those
already discussed. Approximately a furlong to the north of the
road, and immediately east of the High Maynard reservoir the
surface of the flood plain gravel was seen to fall slightly into a
depression which crossed the working in a roughly NW-SE
direction. This "channel" may have been 150 to 200ft. wide
in its deepest part and descended to about 16.0 O.D. About a
quarter of a mile north of the road the gravel was some four
feet higher.
*Since this paper went to press evidence of such deposits
has been found in the east of the pit. Full details have yet
to be worked out.