This sampling survey has been carried out by Institute of Geological Sciences now British Geological Survey (BGS) and George Wimpey and Co Ltd for BGS, the survey took place from June to September 1969 in the Sea of Hebrides, Clyde, Irish Sea, North Channel and Tay-Forth areas on board the MV Maria W. The purpose was to collect data as part of UK regional mapping programme. Sample data were collected using dredge; gravity corer; rock drill; vibrocorer; beach sampling; diver; photograph and Shipek grab. Most of these data are archived by BGS. Reference to part of the survey contained in IGS report 73/14.