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London Gateway Compensation Site A Geoarchaeological assessment of cultural and palaeoenvironmental resources and London Gateway: Compensation Site A Archaeological Trenching

Carey, Chris and Donnelly, Mike London Gateway Compensation Site A Geoarchaeological assessment of cultural and palaeoenvironmental resources and London Gateway: Compensation Site A Archaeological Trenching. [Client Report] (Unpublished)

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Abstract

A combination of gradiometer survey, electrical resistivity survey and evaluation trenching at Compensation Site A, to the west of the main London Gateway development, has revealed evidence for regionally significant multi-period archaeological remains, adjacent to Mucking Creek, in Stanford-le-Hope, Essex. In February 2009, OA carried out a series of trench excavations in a 41.5 Ha area which is to be transformed into an inter-tidal mudflat habitat as part of the ecological mitigation for the London Gateway development. This involves reducing the ground level across the site by 500 mm and then breaching the sea wall to allow the site to flood at high tide. The significant archaeology discovered to date includes a concentration of prehistoric worked flint tools, including probable late Mesolithic or early Neolithic artefacts, a series of early Romano-British rectangular settlement enclosures and contemporary salt-making sites. Saltmaking seems to have been an important regional industry in the centuries immediately before and after the Roman conquest of Britain, from c.150BC to c.250AD. Sites of this kind, known as ‘red hills’, are a characteristic feature of the Essex coastal marshes, although only a few have been systematically excavated (Fawn et al, 1990). Medieval pottery has been recovered from the same area as the Roman finds. The post-medieval site of Stanford-le-Hope Wharf, which was active into the 20th century, lay immediately adjacent, completing the impression of persistent riverside activity at this location from at least the early Neolithic until the modern period, although this need not have been continuous. A second, less complex focus of archaeological remains, at the eastern edge of Compensation Site A appears to comprise further evidence for Romano-British salt-making, in the form of a second red hill. Extensive assessment of the geoarchaeological sequence, using a combination of techniques, has successfully characterised the depth and distribution of alluvial sediments across the site. The relationship of archaeological deposits to major palaeochannels has been partially defined, and the age of major sediment units has been estimated using stratigraphic evidence. Within this 41.5 Ha site, archaeological features appear, on present evidence, to be concentrated in areas where the gravel terrace rises to the surface in the northern half of the site, but appear sparsely distributed or absent in the southern part of the site where the alluvial deposits are deeper. As a result of the discoveries, a programme of mitigation is proposed before construction takes place, involving detailed excavation of the most significant remains, controlled archaeological stripping throughout the northern part of Site A, and monitoring during construction in the remainder of the site.

Item Type:Client Report
Subjects:Geographical Areas > English Counties > Essex
Period > UK Periods > Iron Age 800 BC - 43 AD
Period > UK Periods > Mesolithic 10,000 - 4,000 BC
Period > UK Periods > Neolithic 4000 - 2200 BC
Period > UK Periods > Roman 43 - 410 AD
ID Code:1652
Deposited By: Scott
Deposited On:22 Apr 2014 10:45
Last Modified:22 Apr 2014 10:45

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