The Great Glen fault, for which a strike-slip displacement of about 2,000 km is proposed from paleomagnetic data by Van der Voo and Scotese, transects the metamorphic Caledonides of Scotland. Comparisons of pre-Caledonian basement complexes, folded cover successions, and late Caledonian intrusive suites occurring in the Northern and Grampian Highlands on either side of the fault reveal a close stage-by-stage correspondence in the geologic histories of these terrains. It is argued that these correspondences are incompatible with displacements of more than about 200 km on the Great Glen fault.

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