| P number: | P527925 |
|---|---|
| Caption: | Photomicrograph of Loch Tay Limestone. Light: XPL. Magnification: x2.5. East face, Dunbeag, Killin, Perthshire, Scotland. |
| Description: | Grey crystalline limestone. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 3. British Geological Survey Petrology Collection sample number S 34429. Photomicrograph details: Light: XPL, Magnification: x2.5. The rock is composed of grains of closely twinned calcite, 2 to 0.5 mm grain size, subordinate quartz and alkali-feldspars in nests with which graphite is associated. Zoisite is present locally, yellowish mica and a serpentinous mineral are accessory. One large grain 1 mm across, of alkali-feldspar occurs in the thin section and there is some pyrite and a little limonite. The sample can be summarised as a limestone with quartz, albite, muscovite and zoisite. It is medium-grained and heteroblastic. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 325.54 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 |
Loading...
Loading...
Reviews
There is currently no feedback