Abstract
Synopsis Shallow geophysical surveys undertaken within the Blane Valley, floored by Loch Lomond Stadial proglacial lake deposits, show that the Pleistocene sequence is significantly thicker than previously suspected. Seismic refraction, resistivity and gravity data demonstrate that the depth to the Upper Old Red Sandstone bedrock varies from 30–100 m, suggesting significant relief on the submerged bedrock surface. The Pleistocene sequence extends to about 80 m below Ordnance Datumn.
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