The old Lewisian rocks of western Scotland are known to have undergone two periods of movement, but detailed structural studies have not been made. Work reported here is a detailed investigation of an area on Clashnessie bay, northwest Scotland. The hornblende gneiss shows two major directions of fold axes, approximately at right angles, with, however, great variability in the smaller folding. Emplacement of basic dikes was followed by later movement, with development of schistosity and lineation.

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