| P number: | P524251 |
|---|---|
| Caption: | Photomicrograph of grit. Light: PPL, Magnification x 2. West of Round Hill, south-west of Penpoint, near Thornhill, Dumfriesshire. |
| Description: | The image shows part of a thin section of a grit from the Southern Uplands. It is composed of a mixture of mineral grains and rock fragments of different sizes, suspended within a fine grained muddy matrix. British Geological Survey Petrology Collection sample number S 94029. Light: PPL, Magnification x 2. Light: PPL, Magnification x 2. The rock consists of a number of different types of grains. The abundant small angular white grains are mainly quartz and feldspar, whilst the large partially rounded brownish-grey grains are lithic fragments. Lithic fragments are derived from other rocks have been eroded. This specimen is part of the Gala Group, a series of medium to thick-bedded turbidites of quartzite and pyroxenous sandstones and coarse-grained greywackes and conglomerates.This specimen was found within the Moniave Shear Zone. The rocks form thinning and fining-upward cycles and would have formed in a mid-fan channelled environment. The rock is Silurian in age. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Hyslop, E.K. |
| Copyright statement: | NERC |
| X longitude/easting: | 283150 |
| Y latitude/northing: | 593170 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 234.19 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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