| P number: | P527810 |
|---|---|
| Caption: | Limestone from Askomill Quarry, Campbeltown, Argyllshire. |
| Description: | A specimen of Loch Tay Limestone, a very coarse, blackish limestone or marble. Quartz is recorded as the principal impurity, along with pyrite and graphite. BGS Sample SL 128. British Geological Survey Petrology Collection sample number MC 7586. Analysis showed: calcium carbonate 83.87 per cent, magnesium oxide 1.30 per cent, insoluble residue 14.83 per cent. Many calcite veins are present in the quarry, some stained with haematite. The limestone dips east 25 degrees north at 25 degrees to 30 degrees and is 40 to 50 feet thick. The face of the quarry was recorded in 1949 as about 50 ft. high, excluding overburden, which amounts to 10 to 15 feet of boulder clay. Near the floor of the quarry there is a sill of epidiorite, 3 to 4 feet thick. The stone was worked to produce ground limestone. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 334.53 KB; 1000 x 683 pixels; 85 x 58 mm (print at 300 DPI); 265 x 181 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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