Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1430; Western Approach to the Dover TSS, Area in SqKm: 704, (09/12/2013 to 01/03/2014), Standard: IHO S44ed5 Order 1a. Contract: Medium. FY 2013/14. Contractor: MMT UK.