| P number: | P527939 |
|---|---|
| Caption: | Photomicrograph of Grantown Limestone. Light: XPL. Magnification: x2.5. 450 yards south-east of Coldholme, Dulnain Bridge, Morayshire, Scotland. |
| Description: | Pale grey and yellowish grey banded, medium-grained crystalline limestone. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 13. British Geological Survey Petrology Collection sample number S 34499. Photomicrograph details: Light: XPL, Magnification: x2.5. The sample consists of granular calcite of varying grain size, 0.2 to 3 mm, with bands rich in granular potash-feldspar, albite and decomposed plagioclase, together with numerous rounded and prismatic grains of diopside and tremolite and flakes of brown phlogopite. Apatite and sphene are accessory. In summary, a limestone with feldspars, diopside, tremolite and phlogopite, foliated, granoblastic. In some parts plagioclase (oligoclase) is abundant, diopside forms large ragged prisms and pale brown phlogopite is an important constituent. Zoisite also is an accessory. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 349.61 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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