| P number: | P527978 |
|---|---|
| Caption: | Photomicrograph of Loch Tay Limestone. Light: XPL. Magnification: x2.5. Quarry 1300 yards east by south of Ronachan House, West Loch Tarbert, Argyllshire, Scotland. |
| Description: | Sparkling grey medium-grained limestone. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 147. British Geological Survey Petrology Collection sample number S 34649. Photomicrograph details: Light: XPL, Magnification: x2.5. The sample is composed of granular calcite of varying grain up to 2 mm, with scattered small quartz and albite grains and muscovite flakes. Some less limy bands are composed of granulitic quartz and albite and irregularly prismatic crystals of clinozoisite cemented by granular calcite. The clinozoisite is charged with black powder (possibly carbon) and encloses also grains of pyrite. Pyrite occurs in large irregular grains, particularly in the quartz-feldspar bands of the rock, but is also present in small grains in the pure carbonate. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 383.34 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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