Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1335; East Coast of Unst, Area in SqKm: 133, (05/03/2010 to 22/04/2010), Standard: IHO S44ed5 Order 1a. Contract: RRS (2006 LT). FY 2009/10. Contractor: MMT.