Buried land surface
David Evans
Historic Environment Record Officer
Planning and Environment
Planning, Transportation & Strategic
Environment
The Council Offices,
Thornbury
BS35 9BP
Phone: 01454 863649
fax:
01454 864473
From:
Sent: 24 September 2010 13:37
To: [log in to unmask]
Subject: Palaeoenvironmental
Deposits
Dear
All,
A
good Friday afternoon question for you all:
I
am amending a record for a site which is just a sequence of deposits containing
plant macro/micro fossils.
i.e. The upper four metres of the silica sand are oxidised
to a red colour, below they are white. This colour change is post depositional.
Bedding within the sand indicate that the water bearing the sand ran
consistently south. The sand contains frequent local concentrations of coal and
black shale and very occasional gravel patches and degraded shell fragments.
Within the white sand are layers of organic mud. Towards the base of the
observed sections these were only 20-200mm bands of sand mixed with organic
mud. The thickest (400mm) were located at the top of the section. Trunks of
birch and conifers were scattered throughout the mud layers. The stump of a
spruce (Picea) was found upright on the uppermost bed and was radiocarbon dated
to 53,000 years BP. The succession of deposits suggests the infilling by mud
and sand of shallow pools within the silica sand.
Any
suggestions as to Monument Type?
Best
wishes
Rob
Rob Edwards
Historic Environment Records Officer,
Archaeology Planning Advisory Service
Tel: 01244 973667
Location: Backford Hall, Backford,
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