| P number: | P527980 |
|---|---|
| Caption: | Photomicrograph of Index Limestone. Light: PPL. Magnification: x10. Keirs Glen, just below Keirs Farm, Ayrshire, Scotland. |
| Description: | Dull grey argillaceous limestone. This specimen is Carboniferous Limestone Series in age. BGS sample number SL 150. British Geological Survey Petrology Collection sample number S 34652. Photomicrograph details: Light: PPL, Magnification: x10. Fragments of medium and small shells, a few foraminiferal and crinoidal remains are enclosed in a turbid base composed of shapeless calcite, probably with a clay admixture and numerous small rhombs of ferriferous carbonate. Locally, small aggregates of scaly kaolinite can be distinguished. Pyrite, carbonaceous and bituminous matter, and some limonite and quartz are present. The small rhombs show by their acute form and their refractive index that the mineral approaches siderite in composition (probably about 80% iron carbonate). |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 367.42 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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