On certain Granophyres, modified by the Incorporation of Gabbro–Fragments, in Strath Skye

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Abstract
The district of Strath in Skye, which has so often formed the subject of geological description, has been assigned to me to be mapped in detail for the Geological Survey; and while engaged in this duty, during the past summer and a portion of the autumn, I had occasion to study the complex series of eruptive rocks which extends from Loch Slapin on the west to the Sound of Scalpay and Broadford Bay on the east. Among the features of interest connected with these igneous rocks, special importance attaches to their relations one to another, and this subject has received due attention. The full details will be fitly deferred until the appearance of the official Memoirs; but, with the sanction of the Director-General, I now present to the Society the following brief account of certain minor intrusions of granophyre illustrating a peculiarity which, I believe, has not yet received notice. The granophyres of Skye have been described, as a whole, by Maccullocch, Oeynhausen and von Dechen, J.D. Forbes, Sir Archibald Geiki, Prof. Judd. Despite mineralogical and textural variations, these rocks have a general community of characters, which they share also with rocks of various ages in other regions. The examples to be described, however, present quite exceptional features, which seem to be worthy of examination. They form five distinct intrusions lyinh north and west of Loch Kilchrist and 2 or 3 miles south–west of Broadford (see Map). At this locality occurs a large tract of massive volcanic agglomerate, which has

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