Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1401; Approaches to the River Humber (Blocks 1 and 3), Area in SqKm: 511, (02/01/2013 to 24/05/2013), Standard: IHO S44ed5 Order 1a. Contract: Medium. FY 2012/13. Contractor: MMT/NetSurvey.