| P number: | P526990 |
|---|---|
| Caption: | Photomicrograph of sandstone from Cullalo Quarry, Aberdour, Fifeshire, Scotland |
| Description: | The image is part of a thin section taken using a relatively high-power lens in order to show the various mineral components and porosity details in the rock. The specimen is of Carboniferous age. British Geological Survey Petrology Collection sample number N 4176. The sandstone is dominated by clear grains of quartz and feldspar, with rare small specks of black carbonaceous debris. The presence of blue dyed resin in the thin section highlights the porosity. Cullalo sandstone was used to repair the High Kirk of St. Giles in Edinburgh between 1829 and 1833, where the greater part of the building (with the exception of the Medieval Tower and the 19th century additions) was encased in the stone. The fine-grained sandstone is mostly polished or lightly tooled and has a greyish colour and is slightly micaceous. A few stones exhibit cross-bedding, and on the whole the stone has weathered well, with only a few, rare ironstone concretions which are weathering out. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 360.96 KB; 1000 x 667 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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