The present study, based on the detailed mapping of minor structures, confirms the original interpretation of Bailey (1910,, 1934) concerning the Dalradian rocks of the Ballachulish district. The rocks are only affected by two deformation phases of any importance. These are correlated with the D1 and D3 phases in the regional deformation history established by Treagus (1974). The structures formed in response to these phases correspond to the primary and secondary structures of Bailey (1910), respectively. The D1 structures comprise the Fort William Slide, the Appin Syncline, the Tom Meadhoin Anticline, the Ballachulish Slide and the Ballachulish Syncline, arranged in order of structural succession. The slides are lags associated with zones of intense D1 deformation. The Stob Ban Synform is a D3 fold which separates downward-facing D1 structures to the SE from upward-facing D1 structures to the NW.

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