Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1332; Shiant Islands, Area in SqKm: 854, (07/04/2011 to 16/07/2011), Standard: IHO S44ed5 Order 1a. Contract: ETV. FY 2010/11. Contractor: NetSurvey.