| P number: | P524219 |
|---|---|
| Caption: | Photomicrograph of brucite marble. Light: PPL, Magnification x 10. Hillside 1150 yards north-west of Ledbeg, Sutherland, Sutherland. |
| Description: | The image is a photomicrograph of a marble, dominated by large intergrown crystals of calcite which have a pale yellowish-brown appearance. The large pale-coloured patch is brucite. British Geological Survey Petrology Collection sample number S 36957. Light: PPL, Magnification x 10. Light: PPL, Magnification x 10. Brucite is a magnesium hydroxide mineral which is characteristically found in dolomitic limestones which have undergone contact metamorphism, and in serpentine. It usually occurs as broad tabular crystals, though sometimes massive or foliated. The brucite marble is formed by the contact metamorphism of the Cambro-Ordovician limestones and dolomites by the intrusion of the younger Caledonian Loch Borralan Complex, a series of mafic and ultramafic syenites. The heat from the molten rock has altered the country rock to a crystalline marble. After the carbonate minerals, calcite and dolomite, brucite is the most common mineral. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Hyslop, E.K. |
| Copyright statement: | NERC |
| Orientation: | Landscape |
| Size: | 235.84 KB; 1000 x 667 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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