Abstract
A Very few dykes of the "greenstone type " are to be seen in the lower gneiss.There are some localities at which the gueiss seems itself to have furnished the material of the dyke, if not to pass into it by insensible gradation.One is a dyke seen in the vicinity of Badnaternag, on the north shore of Loch Assynt. Here the dyke runs along the strike of the rock.

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