| P number: | P527948 |
|---|---|
| Caption: | Photomicrograph of cornstone. Light: XPL. Magnification: x2.5. Old lime kiln at base of cliff, 400 yards north-north-east of Seagreens, East Mathers, Kincardineshire, Scotland. |
| Description: | Purplish-grey, compact limestone with veins of clear calcite. This specimen is Upper Old Red Sandstone (Devonian) in age. BGS sample number SL 24. British Geological Survey Petrology Collection sample number S 34545. Photomicrograph details: Light: XPL, Magnification: x2.5. The rock contains granular calcite, and has the patchy distribution of fine, medium and coarse grains typical of cornstones, suggesting the original rock was of fine texture, 0.005 mm grain, with coarser material recrystallized or depositing in drying cracks. Relics of the original very fine semi-opaque carbonate-rock show pellet-structure and, rarely, a cellular structure which may indicate algal growths. The thin section is crossed by large prominent veins containing relatively coarse-grained calcite. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 381.74 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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