| P number: | P527984 |
|---|---|
| Caption: | Photomicrograph of Durness Limestone. Light: PPL. Magnification: x2.5. Field about 350 yards south-south-west of Sarsgrum, about 50 yards east of the road, Sutherland, Scotland. |
| Description: | Crystalline dolomite of grain size varying from 0.2-0.6 mm and of a slightly brown colour in transmitted light. This specimen is Cambro-Ordovician in age. BGS sample number SL 176. British Geological Survey Petrology Collection sample number S 34838. Photomicrograph details: Light: PPL, Magnification: x2.5. The grains are interlocking and mostly of irregular shape but a proportion of them show rhomboid outlines. Ferruginous clay locally forms impersistent, intergranular films. The thin section includes parts with grain size of about 0.1 mm, irregularly and transitionally mixed with coarser-grained dolomite of about 0.4 mm grain size. Ferruginous material is present in very small quantity as short films and intergranular pellicles. Recrystallization to coarse grain size has taken place along sharp-walled channels separating portions in which recrystallization to smaller grain size has occurred. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 272.44 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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