Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1424; DWR North Hinder to DWR Off Brown Ridge, Area in SqKm: 570, (17/03/2014 to 17/04/2014), Standard: IHO S44ed5 Order 1a. Contract: Medium. FY 2013/14. Contractor: MMT UK.