| P number: | P001722 |
|---|---|
| Old photograph number: | B00250 |
| Caption: | A little east of Kildonan Castle, south-east coast of Arran, Buteshire. Side of Palaeocene dolerite dyke cutting Triassic sandstone, showing ends of columns at right-angles to planes of cooling. |
| Description: | A little east of Kildonan Castle, south-east coast of Arran, Buteshire. Side of Palaeocene dolerite dyke cutting Triassic sandstone, showing ends of columns at right-angles to planes of cooling. Dykes form when magma is intruded up subvertical fissures. In Arran, most are associated with the volcanic episode which produced the central and northern volcanic centres. After intrusion, cooling was most rapid at the margins, and cracks developed preferentially at right-angles to the contacts. Hence roughly polygonal cracks separate roughly horizontal columns, in contrast to sills and lava flows where the columns are vertical. |
| 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: | 203700 |
| Y latitude/northing: | 621000 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 192.47 KB; 1000 x 766 pixels; 85 x 65 mm (print at 300 DPI); 265 x 203 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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