Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1339; Thames Estuary and Dover Strait RRS (Pt 2), Area in SqKm: 88; Thames Estuary and Dover Strait RRS (DS), Area in SqKm: 8; Thames Estuary and Dover Strait RRS (Pt 1), Area in SqKm: 32, (22/07/2010 to 02/08/2010), Standard: IHO S44ed5 Order 1a. Contract: RRS (2006 LT). FY 2010/11. Contractor: MMT.