| P number: | P527949 |
|---|---|
| Caption: | Photomicrograph of nodular cornstone. Light: XPL. Magnification: x2.5. Old quarry 400 yards west-south-west of Huntley Hill, 2.5 miles north-east of Brechin, Angus, Scotland. |
| Description: | Dark grey-brown compact limestone composed of finely-divided turbid calcite, recrystallized along desiccation cracks to a coarser grain size. This specimen is Lower Old Red Sandstone (Devonian) in age. BGS sample number SL 27. British Geological Survey Petrology Collection sample number S 34548. Photomicrograph details: Light: XPL, Magnification: x2.5. The sample contains angular grains of quartz and subordinate plagioclase, felsite with microporphyritic quartz, chert and feldspathic siltstone are abundant and range from 1 mm downwards in length. Long slivers of muscovite, biotite, oxidized biotite and chlorite are present. Garnet and staurolite are scarce accessories. In summary the rock is an arenaceous, micrograined limestone, with small impurities scattered throughout. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 349.24 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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