Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1163; Holm Channel, Area in SqKm: 0, (30/06/2006 to 20/06/2006), Standard: IHO S44ed4 Order 1. Contract: RRS (2006 LT). FY 2006/07. Contractor: MMT.