| P number: | P552549 |
|---|---|
| Caption: | Coccolite marble. Quarry 92 yards east 31 degrees south of Balephetrish Tiree. Argyll. |
| Description: | An elongated mass of marble, 200 ft. by 50 ft., enclosed on three sides by black hornblende-augite-gneiss; fourth side passes under drift. S 31697. Pink marble speckled with green clots. The section shows an aggregation of very fine-grained calcite in which numerous lens-shaped relics of larger grains are arranged parallel in shear-schistosity. Rounded crystals of pale green pyroxene, micacized scapolite, a negative alkali-feldspar and large grains of calcite form xenolith-like aggregates. Sphene, apatite and limonitic aggregate are accessory constituents which occur both as isolated grains in the calcite matrix and in association with the pyroxene clusters. Limestone with calcsilicates, micrograined, pseudoporphyroblastic, granoschistose, sheared. GS0001. Britrocks S31697(a). Magnification x40. Light XPL. |
| 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. Duplicate Slide Rename to P101042. |
| Orientation: | Landscape |
| Size: | 365.30 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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