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Table 9: Sediment descriptions for samples of boreholes

'Depth (m AOD)' is nominal, a rounded value for the middle of the sampled segment.

Borehole (and depth below datum) Depth (m AOD) Sample Type of deposit Sediment description
BH2 0.68-1.6m 13.2 2002 unknown homogeneous, dark grey-brown, crumbly, sandy clay silt, with some wood 30-40mm
BH2 2.50-2.55m 11.8 2007 unknown dark, slightly greyish-brown, crumbly, slightly structured (working just plastic), slightly sandy humic silt, with small stones (<20mm) and brick/tile
BH8 1.95-2.15m 12.3 8001 unknown mid orange-brownish grey, crumbly (working slightly plastic), slightly sandy clay silt with ?amorphous organic material and fragments of charcoal, bone, limestone or mortar and brick/tile; mottled on mm-scale with orange and grey, perhaps clasts of different sediments; some mould growth
BH8 2.15-2.28m 12.1 8002 unknown mid-dark grey, crumbly (working plastic), sandy clay with flecks of charcoal; some mm-scale light brown patches and traces of mould growth
BH8 2.45-2.70m 11.8 8004 unknown dark grey-brown, crumbly (working slightly plastic), slightly sandy humic silt with leather, well-preserved wood, bone and oyster shell; traces of mould growth
BH8 3.22-3.48m 11 8005 unknown dark grey-brown, crumbly (working slightly plastic), slightly sandy silt with wood fragments; some mould growth
BH8 3.50-3.59m 10.8 8006 unknown dark brown, crumbly, somewhat layered (working just plastic), very humic sandy silt; wood common, 2-20mm stones present; heterogeneous at cm-scale with patches of light brown fine sand and grey gritty silt
BH8 3.95-4.50m 10.1 8007 unknown essentially as 8006, with oyster shell, limestone and reddish-brown decayed wood
BH8 4.75-4.95m 9.5 8008 unknown pinkish-buff, plastic, slightly silty clay; some mould growth
BH8 4.95-5.35m 9.2 8009 unknown mid-dark grey, slightly sandy clay silt; heterogeneous: quite crumbly in places and grey soft clay in others
BH8 5.35-5.50m 8.9 8010 unknown heterogeneous: mixture of pale orange-brown crumbly (working plastic) silty clay and dark grey crumbly (more easily working plastic) gritty sandy clay silt; some mould growth
BH8 6.45-6.70m 7.7 8013 unknown very humic (with some herbaceous detritus), crumbly (working plastic) sandy 'silt'

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Last updated: Wed Mar 6 2002