| P number: | P531428 |
|---|---|
| Caption: | Photomicrograph of limestone. Light: PPL. Magnification: x2.5. Quarry, Blackwoodridge Limeworks, 50 yards south of Blackwoodridge Farm, 1 mile south of Waterbeck, Dumfriesshire, Scotland. |
| Description: | A reddish, compact limestone with duller red banding, reacting freely with dilute hydrochloric acid. This specimen is Carboniferous Limestone Series in age. BGS sample number SL 264. British Geological Survey Petrology Collection sample number S 35468. Photomicrograph details: Light: PPL, Magnification: x2.5. In thin section the more crystalline part is seen to be composed of anhedral grains of calcite about 0.05-0.1 mm across, among which are preserved relics of fossil structures. The duller red portion is composed of fossil debris, including foraminifera, shell and crinoid fragments, ostracod shells, productid spines, scarce algal nodules and coral. The matrix is recrystallized to fine-grained granular calcite, and red iron ore is abundantly disseminated through it. There may be a little dolomite in the matrix, as some grains give rhomboid sections. The sample is a micrograined limestone, containing recrystallized remains of microfossils. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 328.90 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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