| P number: | P524317 |
|---|---|
| Caption: | Photomicrograph of metasandstone. Light: XPL, Magnification x 2. 100 m. 273 degrees from mast above Lime Craig Quarry, Aberfoyle, Perthshire. |
| Description: | The image shows a photomicrograph of a thin section under crossed-polarized light. It is a metamorphosed sandstone, composed primarily of abundant small grains of quartz and feldspar within a micaceous and iron-rich matrix. British Geological Survey Petrology Collection sample number S 98583. Light: XPL, Magnification x 2. Light: XPL, Magnification x 2. The presence of relatively coarse-grained micas in the matrix suggests that these have grown during low-grade metamorphism. Rocks of the Highland Border Complex from which this specimen is derived range in age from the Lower Cambrian to the Ordovician. The rocks themselves are a distinctive mix of igneous, meta-igneous and sedimentary rocks quite distinctive from the main Dalradian succession. They were originally referred to as the Highland Border Series in 1901 by George Barrow. Their stratigraphy, structure, metamorphism and tectonic setting have been in constant scientific debate ever since. |
| 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: | 290.76 KB; 1000 x 671 pixels; 85 x 57 mm (print at 300 DPI); 265 x 178 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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