| P number: | P524316 |
|---|---|
| Caption: | Photomicrograph of metasandstone. Light: PPL, Magnification x 2. 100 m. 273 degrees from mast above Lime Craig Quarry, Aberfoyle, Perthshire. |
| Description: | The image is a photomicrograph of a thin section of fine-grained metamorphosed sandstone. British Geological Survey Petrology Collection sample number S 98583. Light: PPL, Magnification x 2. Light: PPL, Magnification x 2. The rock consists of abundant small grains of bright quartz and feldspar, which are cemented within a brown-coloured matrix of mica and iron oxide. The metamorphic grade of this rock is very low, and it retains most of the features of the original sedimentary sandstone. The only obvious changes are the loss of porosity (as seen by the fact it is a highly compacted rock) and the presence of micas in the matrix. The specimen is from the Highland Border Complex. The complex comprises a group of highly varied lithologies: igneous and meta-igneous rocks, terrigenous mudstones, black shales, quartz arenites and minor limestones. The rocks occur as a series of generally fault-bounded slivers ranging from a few metres to several kilometres in size along the Highland Boundary Fault Zone between Stonehaven and Arran. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Hyslop, E.K. |
| Copyright statement: | NERC |
| X longitude/easting: | 253380 |
| Y latitude/northing: | 701870 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 305.23 KB; 1000 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: | Unsorted Images |
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