Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1352; North Minch, Area in SqKm: 904, (30/10/2011 to 05/12/2011), Standard: IHO S44ed5 Order 1a. Contract: Medium (2011). FY 2009/10. Contractor: NetSurvey.