| P number: | P527953 |
|---|---|
| Caption: | Photomicrograph of cornstone. Light: XPL. Magnification: x2.5. Craigdullyeart Limeworks, 3 miles east-north-east of New Cumnock, Ayrshire, Scotland. |
| Description: | Dull cream-coloured rock which is much fractured. This specimen is Upper Old Red Sandstone (Devonian) in age. BGS sample number SL 94. British Geological Survey Petrology Collection sample number S 34560. Photomicrograph details: Light: XPL, Magnification: x2.5. The sample is composed of a mixture of very fine-grained turbid carbonate and recrystallized granular carbonate of grain size varying from 0.03-0.3 mm. Rarely short tubules in the fine, turbid component suggest that it is partly algal in origin. In recrystallization clay material is concentrated sometimes round the periphery of relict pieces of fine-grained carbonate, sometimes interstitially between the recrystallized grains. Angular quartz and subordinate alkali-feldspar grains, up to 0.5 mm long, occur abundantly in patches; clay is present as impersistent irregular films; flakes of chlorite and grains of chert are accessory. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 374.32 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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