| P number: | P527976 |
|---|---|
| Caption: | Photomicrograph of metamorphic limestone. Light: XPL. Magnification: x2.5. Old quarry 550 yards south-east of Strichen station, Aberdeenshire, Scotland. |
| Description: | Grey, compact granulite with thin dull white limestone laminae. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 145. British Geological Survey Petrology Collection sample number S 34647. Photomicrograph details: Light: XPL, Magnification: x2.5. The rock contains quartz and potash feldspar with alternate laminae rich in pale green tremolite and/or pyroxene. Biotite is abundant in ragged poikiloblastic plates in a few laminae. Sphene is usually an abundant accessory. Calcite is present both in quartz-feldspar laminae and in those rich in hornblende, but is confined to thin bands in the rock. Iron ore in irregular grains and aggregates is an abundant accessory. The rock is a calcareous quartz-feldspar granulite with talc-silicates, and a foliated texture. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 387.51 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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