Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1413; DWR Via DR1 - DR1 to DR2, Area in SqKm: 418, (10/02/2013 to 21/03/2013), Standard: IHO S44ed5 Order 1a. Contract: Medium (2011). FY 2012/13. Contractor: MMT UK.