| P number: | P002393 |
|---|---|
| Old photograph number: | C02754 |
| Caption: | Am Buachaille, Staffa, Argyllshire. Tertiary lava flow with columnar jointing. |
| Description: | Am Buachaille, Staffa, Argyllshire. Tertiary lava flow with columnar jointing. Tertiary lava flow showing unusual curved prostrate columns giving the appearance of the ribs of a ship. Note that the columns in the conical feature radiate from several centres, reflecting the irregular cooling history of the flow. The columns in the left foreground are vertical and their hexagonal tops can be seen on the wave-cut platform. Columnar jointing is a characteristic feature of many minor intrusions. It is especially obvious in sills where the columns are commonly vertical. They originate by the development of a regular series of contraction joints perpendicular to the cooling surface as the rock cools from molten magma to the solid state. The columns are commonly hexagonal in pattern when viewed end-on. |
| Date taken: | Thu Jan 01 00:00:00 GMT 1920 |
| Photographer: | Manson, W. |
| Copyright statement: | Crown |
| Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
| X longitude/easting: | 132500 |
| Y latitude/northing: | 735500 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 186.21 KB; 1000 x 756 pixels; 85 x 64 mm (print at 300 DPI); 265 x 200 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images, Geoscience subjects/ Igneous features/ Lava flows |
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