| P number: | P001721 |
|---|---|
| Old photograph number: | B00248 |
| Caption: | Porta Leacach, south-east coast of Arran, Buteshire. Tertiary basalt dyke (0.6 m. broad) cutting Triassic sandstones. |
| Description: | Porta Leacach, south-east coast of Arran, Buteshire. Tertiary basalt dyke (0.6 m. broad) cutting Triassic sandstones. Pale, subhorizontally-bedded sandstone dips gently seaward. Joints are spaced c. 2 metres apart. The dyke (dark) is relatively fine-grained, because it is narrow, and therefore cooled quickly. Here its hardness is compensated by its relatively close (0.15 m.) jointing, and it does not stand proud of the sandstone. Most of the large loose blocks are dolerite, either from dykes or from the Dippin sill. |
| Date taken: | Fri Jan 01 00:00:00 GMT 1897 |
| Photographer: | Lunn, R. |
| Copyright statement: | Crown |
| Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
| X longitude/easting: | 204200 |
| Y latitude/northing: | 621400 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Portrait |
| Size: | 252.08 KB; 764 x 1000 pixels; 65 x 85 mm (print at 300 DPI); 202 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images, Geoscience subjects/ Igneous features/ Dykes |
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