Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1304; St Kilda to the Flannan Islands, Area in SqKm: 1380, (14/05/2010 to 16/07/2010), Standard: IHO S44ed5 Order 1a. Contract: Medium (LT). FY 2009/10. Contractor: Gardline.