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16/03/2009 11:30:18
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P number: P527736
Caption: Limestone from the Torran area, Skye, Invernessshire.
Description: Limestone from the Torran area, Skye, Invernessshire. The limestone is part of the Cambro-Ordovician outcrop of Durness Limestone, a series of dolomites, dolomitic limestones and dolomites, some of which have been contact-metamorphosed to marbles by the emplacement of the adjacent Beinn Dubhaich granite. British Geological Survey Petrology Collection sample number MC 7513. Outside the contact aureole the limestones all present a remarkably similar appearance, dull, medium or dark grey, very fine-grained rocks with, invariably, random white streaks, wisps and veins of calcite. The specific gravity of the limestones varies from 2.675 to 2.71 and is controlled by three variables, silica content, magnesia content and porosity. In thin section all specimens show a very fine-grained tessellate mosaic of calcite grains cut by numerous veins of coarser calcite.
Date taken: 25/06/1905
Photographer: Unknown
Copyright statement: Unknown
Orientation: Landscape
Size: 188.94 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI);
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