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Uploaded on:
13/02/2009 09:48:58
Type:
Digital Asset
File Size:
234.50 KB
Dimensions:
1001 x 668 pixels
2404 views 5 downloads
P number: P001011
Old photograph number: D03196
Caption: Eaval in North Uist viewed from near Balaglas, north end of Grimsay, Benbecula. Outer Hebrides. Dip-slope of thrust Lewisian gneiss above Outer Hebrides Thrust Zone.
Description: Eaval in North Uist viewed from near Balaglas, north end of Grimsay, Benbecula. Outer Hebrides. Dip-slope of thrust Lewisian gneiss above Outer Hebrides Thrust Zone. Eaval is noted for the development of pseudotachylite, a dense, black, flinty rock thought to have formed by the brittle fracturing of the gneiss resulting in local melting by frictional sliding and associated with the intense thrusting. Pseudotachylites typically develop in compact, relatively dry high-grade metamorphic rocks especially quartz-gneisses in areas of strong uplift, either during or subsequent to thrusting.
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: 85900
Y latitude/northing: 857700
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 234.50 KB; 1001 x 668 pixels; 85 x 57 mm (print at 300 DPI); 265 x 177 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Landscapes, Geoscience subjects/ Structural features/ Thrusting  

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