| 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: | Tue Jan 01 00:00:00 GMT 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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