Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1429; Dover TSS Extension Area, Area in SqKm: 118, (14/06/2014 to 29/06/2014), Standard: IHO S44ed5 Order 1a. Contract: Medium. FY 2014/15. Contractor: MMT UK.