| P number: | P007087 |
|---|---|
| Old photograph number: | L01456 |
| Caption: | Penrhyn Quarry, Bethesda. Looking ENE. |
| Description: | Penrhyn Quarry, Bethesda. Looking ENE. Pre-Caledonian dolerite dyke. Probably of Upper Ordovician age, dykes of this type were strongly deformed during the Caledonian orogeny leading to the development of pinch and swell structures and quartz filled tension gashes which are here well illustrated. This example trends approximately perpendicular to the cleavage in the slates and locally jointing parallel to dyke margins is strongly developed. |
| Date taken: | Wed May 01 00:00:00 BST 1974 |
| Photographer: | Thornton, K.E. |
| Copyright statement: | NERC |
| Acknowledgment: | This image was digitized with grant-in-aid from JIDI the JISC Image Digitization Initiative |
| X longitude/easting: | 262240 |
| Y latitude/northing: | 364800 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Portrait |
| Size: | 374.54 KB; 787 x 1000 pixels; 67 x 85 mm (print at 300 DPI); 208 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Best of BGS Images/ Geological structures |
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