| P number: | P527935 |
|---|---|
| Caption: | Photomicrograph of dolomite. Light: XPL. Magnification: x2.5. Carnbee Dean, 2.5 miles north-north-west of Pittenweem, Fifeshire, Scotland. |
| Description: | Dark grey dolomitized encrinital limestone. This specimen is Calciferous Sandstone Series (Carboniferous) in age. BGS sample number SL 33. British Geological Survey Petrology Collection sample number S 34456. Photomicrograph details: Light: XPL, Magnification: x2.5. The sample consists of a mass of fragments of crinoid, some shells and scarce foraminifera replaced by granular dolomite in a base of finely granular dolomite and clay among which deeply yellow stained grains of sideritic carbonate are distributed. The dolomite replacing the fossil fragments is ferriferous with a variable content of ferrodolomite of about 20 per cent estimated from the refractive index, 1.700 and slightly less. Quartz in small angular grains, 0.05 mm, and pyrite in clusters of granules are common throughout the fine-grained matrix. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 331.83 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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