| P number: | P527950 |
|---|---|
| Caption: | Photomicrograph of North Greens (No. 2) Limestone. Light: XPL. Magnification: x2.5. Upper Side Quarry, 100 yards south-south-west of Fountainside, 2.5 miles south-west of Temple, Midlothian, Scotland. |
| Description: | Compact, dark grey limestone. This specimen is Carboniferous Limestone Series in age. BGS sample number SL 81. British Geological Survey Petrology Collection sample number S 34555. Photomicrograph details: Light: XPL, Magnification: x2.5. Partly recrystallized fragments of thin shells, scarce foraminifera, scarce small shells filled with clear granular calcite, numerous pyrite-impregnated straight and curved fragments and very scarce polyzoan fragments are embedded in a base of very fine-grained, granular calcite and probably clay. The grain size of the base increases in places to 0.03 mm size. The rock is traversed by very thin impersistent calcite-filled fractures. A few small crystals of a yellow, highly refractive, isotropic mineral taken to be sphalerite occur in a shell and a spine. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 424.69 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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