| P number: | P528031 |
|---|---|
| Caption: | Photomicrograph of limestone. Light: PPL. Magnification: x2.5. Glenlia Quarry, near Foyers, Invernessshire, Scotland. |
| Description: | A dull, compact limestone with varying shades of grey, greenish and pinkish-mottle. This specimen is Lower Cambrian Fucoid Beds in age. BGS sample number SL 241. British Geological Survey Petrology Collection sample number S 35274. Photomicrograph details: Light: PPL, Magnification: x2.5. The rock is composed essentially of calcite, talc-silicates, mica and feldspar, with accessory sphene. The calcite is in grains up to 0.5 mm across. The talc-silicates include zoisite, epidote, pyroxene, pale green tremolite, the total and relative abundance of which vary from place to place in the sample. The feldspar is chiefly potash-feldspar and shows microcline twinning occasionally. Some albite is also present. The mica is a brown phlogopite. In summary the sample is a limestone with feldspathic calcsilicate folia. It has a foliated, granoschistose texture. |
| Date taken: | 25/06/1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 308.35 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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