| P number: | P527946 |
|---|---|
| Caption: | Photomicrograph of North Greens (No. 2) Limestone. Light: XPL. Magnification: x2.5. Quarry 160 yards north-west of Northfield, Cousland Lime Workings, 2.5 miles east-north-east of Dalkeith, Midlothian, Scotland. |
| Description: | A grey and brownish, earthy limestone. This specimen is Carboniferous Limestone Series in age. BGS sample number SL 57. British Geological Survey Petrology Collection sample number S 34539. Photomicrograph details: Light: XPL, Magnification: x2.5. The thin section shows almost equal proportions of brown argillaceous and calcareous material, among which thin rectangular sections (possibly pieces of thin-walled shells) are prominent. Remains of crinoids, polyzoa, shells and spines can be recognized but for the most part the calcareous material is small platy debris. Angular grains of quartz and shreds of muscovite and bleached biotite are common throughout the rock. The rock is a calcareous shale, containing animal remains mainly in the form of angular, little-worn debris. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 451.40 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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