| P number: | P002394 |
|---|---|
| Old photograph number: | C02755 |
| Caption: | Island of Staffa, Argyllshire, showing columnar jointing in basalt lava. |
| Description: | Island of Staffa, Argyllshire, showing columnar jointing in basalt lava. Staffa, like Mull, is part of the Tertiary Volcanic Province and has many classic examples of columnar jointed basalt lavas. The columns in the background are slightly curved, perhaps in response to the orientation of the original cooling surfaces. Foreground columns display the typical hexagonal pattern. Part of the Tertiary Volcanic Province. 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: | 235.75 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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