| P number: | P528006 |
|---|---|
| Caption: | Photomicrograph of Weisdale Limestone. Light: XPL. Magnification: x2.5. Sursetter, 1.5 miles north of Voe, Shetland Isles, Scotland. |
| Description: | A moderately coarse-grained, white crystalline limestone. This specimen is Shetland metamorphic in age. BGS sample number SL 190. British Geological Survey Petrology Collection sample number S 34954. Photomicrograph details: Light: XPL, Magnification: x2.5. The sample is composed of coarsely sutured grains of calcite, about 1 mm long, which tend to be elongated in a direction of rather poor schistosity defined by a general parallel orientation of muscovite. The latter is a subordinate essential constituent forming flakes approaching, and rarely exceeding, 1 mm in length. A minor quantity of oligoclase and quartz is present, generally in association with muscovite. Prismatic zoisite, tremolite and a fibrous aggregate which develops into micaceous flakes, are minor essential constituents. Zoisite and muscovite form symplectitic intergrowths with quartz. Colourless tourmaline in small hexagonal prisms, leucoxene, pyrite and pyrrhotite are abundant; apatite, sphene and zircon are scarce accessories. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 327.18 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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