| P number: | P527932 |
|---|---|
| Caption: | Photomicrograph of Kirkby's V Limestone. Light: PPL. Magnification: x2.5. Shore at Randerston, Fifeshire, Scotland. |
| Description: | Brownish-buff massive rock which in some bands are almost wholly composed of shells. This specimen is Calciferous Sandstone Series (Carboniferous) in age. BGS sample number SL 30. British Geological Survey Petrology Collection sample number S 34452. Photomicrograph details: Light: PPL, Magnification: x2.5. In thin section the shells are seen to be cemented by a matrix of fine granular clear carbonate in which are set numerous granules of oxidized siderite (0.01-0.02 mm), angular quartz grains (0.1-0.5 mm) and a few yellow phosphatic fossil fragments. A few small cavities are filled with kaolin. The carbonate replacing the shells is an ankerite the refractive index of which is variable being generally between 1.690 and 1.700 but as high as 1.705, and the fine-grained carbonate of the matrix is similar. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 321.77 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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