| P number: | P527955 |
|---|---|
| Caption: | Photomicrograph of Tayvallich Limestone. Light: XPL. Magnification: x2.5. Roadside quarry, 1 mile north of Kilchrenan, Argyllshire, Scotland. |
| Description: | Grey limestone, laminated lighter and darker grey. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 123. British Geological Survey Petrology Collection sample number S 34571. Photomicrograph details: Light: XPL, Magnification: x2.5. The rock is composed of calcite, subordinate quartz and micaceous carbonaceous films. The quartz is mostly in large composite grains, or aggregates of smaller grains, associated with granular calcite of about 1.0 mm grain size. The quartz and this type of calcite, which is brownish and highly cleaved, form ellipsoidal nodules, or less regular lenticular aggregates round which sweep laminae composed of more fine-grained calcite, about 0.1 mm grain size, and streaked with carbonaceous matter. Small grains of quartz also occur throughout this matrix. In summary, a coarse to fine-grained limestone with quartz, and a granoschistose and grain-foliated texture. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 376.97 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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