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Uploaded on:
13/02/2009 09:46:52
Type:
Digital Asset
File Size:
246.93 KB
Dimensions:
1001 x 667 pixels
4110 views 5 downloads
P number: P001006
Old photograph number: D03191
Caption: Roadside (A 867) west of Loch Maddy, looking south-east. North Uist, Outer Hebrides. Lewisian scenery. Flat peat-covered central North Uist with upstanding hills - North Lee and South Lee of Lewisian above Outer Hebrides Thrust Zone.
Description: Roadside (A 867) west of Loch Maddy, looking south-east. North Uist, Outer Hebrides. Lewisian scenery. Flat peat-covered central North Uist with upstanding hills - North Lee and South Lee of Lewisian above Outer Hebrides Thrust Zone. The Lees are formed of pseudotachylite which has welded together the otherwise broken and friable gneiss of the thrust zone making the rock more resistant to weathering and giving rise to the prominent hills. The pseudotachylite is a dense, black, flinty rock thought to have formed by the brittle fracturing of the gneiss resulting in local melting by frictional sliding. The hot molten material is injected into the adjacent gneiss to form an intricate vein network of black glass.
Date taken: 01/01/1980
Photographer: Pulsford, J.M.
Copyright statement: NERC
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 87800
Y latitude/northing: 867800
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 246.93 KB; 1001 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: Best of BGS Images/ Landscapes, Geoscience subjects/ General views  

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