| P number: | P526984 |
|---|---|
| Caption: | Photomicrograph of sandstone from Ravelston No. 2 Quarry, Corstorphine, Edinburgh, Lothian Region, Scotland |
| Description: | The image is a relatively high-power microscopic view of a thin section of sandstone, showing the various mineral components and porosity details in the rock. The specimen is of Carboniferous age. British Geological Survey Petrology Collection sample number ED 7591. The clear grains of quartz show a thin coating of black hydrocarbon. This is responsible for the black colour of the well-known 'Ravelston Black' sandstone. Some of the sandstone at the Ravelston Quarry is black in colour because of the presence of hydrocarbon which infills pore spaces and coats many of the quartz and feldspar sand grains. The hydrocarbon may have flowed into the porous sandstone as a result of heating from the nearby Corstorphine Hill igneous sill. The Ravelston Sandstone is part of the Carboniferous Lower Oil-Shale Group. It is located on the south-west side of the Granton Dome. |
| Date taken: | Sun Jun 25 00:00:00 GMT 1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Landscape |
| Size: | 342.66 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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