Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1202; Westray & Stronsay Firth, Area in SqKm: 221, (09/11/2006 to 28/12/2006), Standard: IHO S44ed4 Order 1. Contract: RRS (2006 LT). FY 2006/07. Contractor: MMT.