| P number: | P000773 |
|---|---|
| Old photograph number: | D02218 |
| Caption: | Oblique aerial view of The Great Face, the south end of the island of Staffa. Argyll and Bute. The Boat Cave is on the left and Fingal's Cave on the right. Massive, straight, well-formed columnar jointing in the Tertiary volcanic lava flow. |
| Description: | Oblique aerial view of The Great Face, the south end of the island of Staffa. Argyll and Bute. The Boat Cave is on the left and Fingal's Cave on the right. Massive, straight, well-formed columnar jointing in the Tertiary volcanic lava flow. The classic type of columnar jointing consists of a close-packed series of hexagonal 'prisms' lying perpendicular, in this case, to the base of the lava flow. Columnar jointing is formed by contraction during the cooling of the lava when a pattern of tensional forces acting towards a number of centres is set up. These forces tend to pull open a series of joints which ideally assume a hexagonal pattern. |
| Date taken: | Sat Jan 01 00:00:00 GMT 1977 |
| Photographer: | Christie, A. |
| Copyright statement: | NERC |
| Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
| X longitude/easting: | 133500 |
| Y latitude/northing: | 735500 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Portrait |
| Size: | 291.24 KB; 987 x 1000 pixels; 84 x 85 mm (print at 300 DPI); 261 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Best of BGS Images/ Landscapes, Geoscience subjects/ Named locality, Geoscience subjects/ Structural geology/ Jointing |
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