Cenozoic reactivation of the Great Glen Fault , Scotland : Additional

13 The Great Glen Fault (GGF) trends NNE-SSW across northern Scotland. According to 14 previous studies, the GGF developed as a left-lateral strike slip fault during the Caledonian 15 Orogeny (Ordovician to Early Devonian). However, it then reactivated right-laterally in the 16 Tertiary. We discuss additional evidence for this later phase. At Eathie and Shandwick, minor 17 folds and faults in fossiliferous Jurassic marine strata indicate post-depositional right-lateral 18 slip. In Jurassic shale, we have found bedding-parallel calcite veins ('beef' and 'cone-in-19 cone') that may provide evidence for overpressure development and maturation of organic 20 matter at significant depth. Thus, the Jurassic strata at Eathie and Shandwick accumulated 21 deeper offshore in the Moray Firth and were subject to Cenozoic exhumation during right-22 lateral displacement along the GGF, as suggested by previous authors. Differential sea-floor 23 spreading along the North East Atlantic ridge system generated left-lateral transpressional 24 displacements along the Faroe Fracture Zone (FFZ) from the Early Eocene to the Late 25 Oligocene (c. 47–26 Ma), a period of uplift and exhumation in Scotland. We suggest that such 26