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P000156

Uploaded on:
13/02/2009 05:44:25
Type:
Digital Asset
File Size:
267.82 KB
Dimensions:
1000 x 727 pixels
2403 views 4 downloads
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: 01/01/1945
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
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