Discriminant trace-element geochemistry has been used to match early amphibolite suites in the Caledonide nappes lying below and above the Sgurr Beag Slide, a major low-angle dislocation in northwest Scotland. This method may be attempted in any structurally complex area in which other, more conventional methods of correlation cannot be used, and in this study in Scotland it reveals that a westward movement of the overriding nappe on the major Sgurr Beag Slide exceeded 140 km.

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