| P number: | P527961 |
|---|---|
| Caption: | Photomicrograph of Tayvallich Limestone. Light: XPL. Magnification: x2.5. Quarry east of Eurach, near Ford, Argyllshire, Scotland. |
| Description: | Dark grey, fine-grained crystalline limestone. This specimen is Dalradian Supergroup (Precambrian) in age. BGS sample number SL 127. British Geological Survey Petrology Collection sample number S 34575. Photomicrograph details: Light: XPL, Magnification: x2.5. The thin section shows irregular, diffuse relics of very fine-grained black-powdered limestone, in a recrystallized base of granular brownish calcite, among which small grains and aggregates of quartz are scattered. The form of the quartz indicates recrystallization. Black dust, graphitic or carbonaceous, and granules are distributed through the recrystallized calcite. One recrystallized oolith was observed and in one place the rock contains an indication of former oolitic structure. In summary the rock is a limestone with some quartz, with variable grain size. It is partly granoblastic. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 382.23 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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