Deglaciation and neotectonics in SE Raasay, Scottish Inner Hebrides

Changes in the physical landscape of SE Raasay at end last Quaternary glaciation are examined. The area is marked by a major fault system defining Beinn na Leac Fault Block, and field survey shows this to comprise rollover anticline SW, with extensional movement towards NE along an oblique transfer fault, Main Fault. was reactivated after Last Glacial Maximum. Survey distinctive ridge detached scree it have involved single least 7.12 m vertical displacement, arguably greatest since before Younger Dryas Scotland. present work confirms that became during Dryas, but finds overlies lacustrine deposit 5.6 laminated sediments from lake which had begun accumulate earlier. Radiocarbon dating peat overlying gave 10 176–10 315 cal years BP, morphological stratigraphical evidence indicates drainage occurred earlier only shortly scree. Possible causes displacement briefly discussed.