| P number: | P553014 |
|---|---|
| Caption: | Limestone, Sandend Group. Glenisla Quarry, Keith. Banff. |
| Description: | Grey foliated crystalline limestone of medium grain. The twinned interlocking calcite grains of which the rock is composed are elongated in the plane of foliation and reach 4 mm in length. Quartz is present as a subordinate mineral and forms grains, often with crystal faces, usually about 0.3 mm but up to 0.5 mm across. The content of quartz is about 5-7 per cent, but is variable. Opaque black and yellow granular matter is also present and is certainly in part pyrite, but perhaps includes graphite. Muscovite and phlogopite are accessory; alkali-feldspar scarce. Limestone with quartz and micas, coarse-grained, granoschistose. SL0238. Britrocks S35271. Magnification x40. Light PPL. |
| Date taken: | Wed Jan 21 00:00:00 GMT 2004 |
| Photographer: | Sutherland, A. |
| Copyright statement: | NERC |
| Additional information: | Description from: Limestones of Scotland: chemical analyses and petrography. Edinburgh : HMSO, 1956. |
| Orientation: | Landscape |
| Size: | 278.22 KB; 1000 x 750 pixels; 85 x 64 mm (print at 300 DPI); 265 x 198 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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