| P number: | P519731 |
|---|---|
| Caption: | Specimen of metamorphosed dolerite from Kilmartin Quarry, Argyllshire, Scotland |
| Description: | The sample is a small highly-polished block of epidiorite which has been used as a decorative cladding. The specimen is of Precambrian, Dalradian age. British Geological Survey Petrology Collection sample number EMC 5703. The name epidiorite is used for a metamorphic rock with a granular texture that has been derived from the alteration of a basic igneous rock but has the minerals of a diorite, in particular amphibole and an intermediate plagioclase feldspar. Epidiorites that have been deformed or metamorphosed under a stress field can develop a metamorphic fabric, where the constituent minerals are aligned in one direction. Such a rock is known as an amphibolite, or hornblende schist. Epidiorites and hornblende schists are common throughout the ancient Dalradian rocks of the Scottish Grampian Highlands. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Bain, T.S. |
| Copyright statement: | NERC |
| Orientation: | Portrait |
| Size: | 117.39 KB; 802 x 1000 pixels; 68 x 85 mm (print at 300 DPI); 212 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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