| P number: | P528015 |
|---|---|
| Caption: | Photomicrograph of Main Limestone. Light: PPL. Magnification: x2.5. Old quarry 300 yards north-west of Crosshouse Farm, 1.5 miles south of Hairmyres station, Lanarkshire, Scotland. |
| Description: | A compact, dull brownish-grey limestone showing scattered small crinoid columnals. This specimen is Carboniferous Limestone Series in age. BGS sample number SL 223. British Geological Survey Petrology Collection sample number S 35081. Photomicrograph details: Light: PPL, Magnification: x2.5. The thin section shows large and small debris of shells and crinoids, with many spines, scattered foraminifera and ostracods, scarce polyzoa and phosphatic fossil fragments. This is contained within a matrix of pelitomorphic calcite which is recrystallized to granular calcite of grain size usually about 0.02 mm but varying up to about 0.15 mm in places. Recrystallization has nearly obliterated many small organisms in the matrix and has affected some of the crinoid columnals. The section also contains one fragment of kaolin-filled cavernous limonite and two nodules of semi-opaque marl which may be faecal in origin. There is a considerable dissemination of ferruginous clay in the matrix and this is locally concentrated in thin black stylolitic films. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 356.77 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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