| P number: | P521311 |
|---|---|
| Caption: | Rock specimen of ophicalcite marble. Marble quarry, Glen Tilt, Blair Atholl, Perthshire, Scotland. |
| Description: | The rock is a pale greenish-white marble with a crystalline or sugary texture. It has a randomly coloured or mottled appearance due to the presence of patchy green-coloured areas. British Geological Survey Petrology Collection sample number EMC1533. An ophicalcite is a variety of marble which contains the olivine mineral forsterite which has been altered and replaced by the mineral serpentine. They typically have a distinct greenish mottled appearance, and are much valued as decorative stones. The metasedimentary rocks of Glen Tilt belong to the Dalradian Supergroup (Precambrian). They are intruded by a Caledonian igneous suite, called the Glen Tilt Complex, which contains mainly granitic rocks with sheets and dykes of microdiorite and quartz-porphyry. |
| Date taken: | Sun Dec 01 00:00:00 GMT 2002 |
| Photographer: | McTaggart, F.I. |
| Associate: | T.S. Bain |
| Copyright statement: | NERC |
| Additional information: | EMC1533 |
| Orientation: | Portrait |
| Size: | 182.68 KB; 775 x 1000 pixels; 66 x 85 mm (print at 300 DPI); 205 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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