| P number: | P527943 |
|---|---|
| Caption: | Photomicrograph of limestone, Sandend Group. Light: PPL. Magnification: x2.5. Quarry, Rinaitin, Glen Rinnes, Banffshire, Scotland. |
| Description: | Banded pale and dark grey, crystalline limestone with micaceous films. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 75. British Geological Survey Petrology Collection sample number S 34515. Photomicrograph details: Light: PPL, Magnification: x2.5. The rock is composed of elongated grains of calcite, up to 3 mm in length, showing a close, curved twinning and traversed by fracture veins in which both calcite and dolomite are present. Quartz is accessory as small grains enclosed in calcite. In the darker bands the calcite grains are enveloped by black graphitic and pyritous dust. Micas, partly chloritized, are present but scarce. In summary a dolomitic limestone, with some quartz. It is granoschistose and sheared. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 318.47 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