| P number: | P000156 |
|---|---|
| Old photograph number: | C03796 |
| Caption: | Sgurr Coire nan Gobhar, Loch Nevis, Knoydart. Inverness-shire. Opencast mica workings. No. 3 Working, Upper Bench. Showing highly inclined bands of mica-bearing pegmatite (white) and schist (grey). |
| Description: | Sgurr Coire nan Gobhar, Loch Nevis, Knoydart. Inverness-shire. Opencast mica workings. No. 3 Working, Upper Bench. Showing highly inclined bands of mica-bearing pegmatite (white) and schist (grey). The deposit was the most extensive and valuable source of mica in the western Highlands. The quartz-rich pegmatite contained books of white mica (muscovite) up to 18 inches to two feet in diameter. Muscovite, the commonest variety of the mica group is a potassium aluminium silicate that at this location forms large crystals that split freely and yield extremely thin, uniform plates and films. |
| Date taken: | Mon Jan 01 00:00:00 BST 1945 |
| Photographer: | Fisher, W.D. |
| Copyright statement: | Crown |
| Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
| X longitude/easting: | 179500 |
| Y latitude/northing: | 796500 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 267.82 KB; 1000 x 727 pixels; 85 x 62 mm (print at 300 DPI); 265 x 192 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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