| P number: | P528007 |
|---|---|
| Caption: | Photomicrograph of limestone. Light: PPL. Magnification: x2.5. 300 yards south of Loch of Burraland, Sullom, 4 miles north of Brae, North Maven, Shetland Isles, Scotland. |
| Description: | A grey, fractured, crystalline limestone. This specimen is Shetland metamorphic in age. BGS sample number SL 191. British Geological Survey Petrology Collection sample number S 34955. Photomicrograph details: Light: PPL, Magnification: x2.5. The rock is composed of strained calcite in grains 0.5-1.5 mm across, traversed by narrow shear zones in which calcite is triturated, and along which muscovite and chlorite are abundant. Yellow tourmaline occurs along thin shear-zones in good prisms which have been fractured by later movement. Oxidized pyrite occurs mainly in or near shear-lines. In summary, the sample is a coarse to medium-grained limestone with muscovite-chlorite schist folia. It has a granoblastic texture and is foliated. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 329.06 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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