Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1370; Approaches to Sound of Jura, Area in SqKm: 789, (28/10/2012 to 19/08/2013), Standard: IHO S44ed5 Order 1a. Contract: Medium. FY 2012/13. Contractor: NetSurvey.