Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1297; Western Approaches to the Small Isles (Pt1 and 2), Area in SqKm: 1395, (23/06/2009 to 17/07/2012), Standard: IHO S44ed5 Order 1a. Contract: ETV. FY 2009/10. Contractor: NetSurvey.