| P number: | P527927 |
|---|---|
| Caption: | Photomicrograph of Charlestown Main Limestone. Light: XPL. Magnification: x2.5. Chapel Quarry, about 2 miles north-west of Kirkcaldy, Fifeshire, Scotland. |
| Description: | Dark grey limestone mottled with white powdery material. This specimen is Carboniferous Limestone Series in age. BGS sample number SL 10. British Geological Survey Petrology Collection sample number S 34444. Photomicrograph details: Light: XPL, Magnification: x2.5. The rock is composed of granular carbonate, 0.1 mm grain size, with debris of shells and crinoids. Nests of more coarsely granular carbonate have a dusky brown appearance. The carbonate is all calcite. Some bands of the rock are rich in tiny grains, giving square and six-sided sections, of garnet (grossular) and also in poorly shaped crystals of datolite. The largest garnet grains are about 0.08 mm across. Part of the rock is more shaly, enclosing crinoid remains. This portion is brown and opaque, but near the edge of the slide it shows fibres and a multitude of minute grains and prisms with high extinction angle. Pectolite has been observed as the main constituent of two very thin sinuous and impersistent veins in one of which the pectolite is locally replaced by apophyllite. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 417.18 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 |
Loading...
Loading...
Reviews
There is currently no feedback