| P number: | P531431 |
|---|---|
| Caption: | Photomicrograph of Stinchar Limestone. Light: PPL. Magnification: x2.5. Kirkdominae Hill, Auchensoul Farm, 2 miles west of Barr, Ayrshire, Scotland. |
| Description: | A fine-grained compact, dark grey limestone. This specimen is Ordovician in age. BGS sample number SL 267. British Geological Survey Petrology Collection sample number S 35505. Photomicrograph details: Light: PPL, Magnification: x2.5. Microscopically the rock is a calcilutite (calcite-mudstone) recrystallized so far that the matrix is an admixture of turbid brown carbonate and clear fine-grained calcite, but without the destruction of the numerous fossil remains of Girvanella and ostracods. Scarce fragments of crinoid, polyzoan and shell, possibly brachiopod, are present. Pyrite is scattered in small grains and clots through the rock as an accessory constituent, and there are stylolitic wisps of limonitic clay. In summary the sample is a very fine-grained muddy limestone, composed of slightly recrystallized pelitomorphic calcite, scarce microdebris of fossils and numerous algal growths. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 312.17 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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