| P number: | P528008 |
|---|---|
| Caption: | Photomicrograph of cementstones, Ballagan Beds. Light: PPL. Magnification: x2.5. Ballagan Burn, 530 yards north of Ballagan House, Stirlingshire, Scotland. |
| Description: | Compact grey rock, composed of a mass of rhomboid dolomite crystals, 0.005-0.02 mm across, with very little turbid matter of any kind, argillaceous or calcareous. This specimen is Calciferous Sandstone Series (Carboniferous) in age. BGS sample number SL 192. British Geological Survey Petrology Collection sample number S 34968. Photomicrograph details: Light: PPL, Magnification: x2.5. Angular grains of quartz, 0.1-0.5 mm across, are abundantly scattered through the rock along with scarce alkali-feldspar, secondary quartz-rock, chlorite and thin prisms of a mineral, occurring in cracks and in association with quartz, which is probably baryte. The thin section may contain small prisms of gypsum, but this is not proven. The rock is a very fine-grained muddy dolomite, with a uniform granular texture. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 318.49 KB; 1000 x 663 pixels; 85 x 56 mm (print at 300 DPI); 265 x 175 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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