| P number: | P526996 |
|---|---|
| Caption: | Photomicrograph of sandstone from Craigleith Quarry, Edinburgh, Lothian Region, 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 ED 7581. The sandstone is dominated by clear grains of quartz, and is a relatively 'clean' sand with very few other mineral components. The presence of blue dyed resin in the thin section highlights the porosity. In 1835 an improved access road to Craigleith Quarry enabled 60 carts to each make an average of five journeys per day into the city. Soon a railway was constructed from the floor of the quarry up the bank. Two horses were used to lift 120 tones of quarry waste out each day, but the operation only required the power of six men to draw up and empty the wagon at the top. During the First World War the deserted quarry was chosen as a suitable remote site on which to manufacture TNT. Previously manufactured at the Lothian Chemical Company, it was deemed unsafe to prepare high explosives in a populated area -Craigleith presented itself as the ideal site. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 359.73 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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