| P number: | P001754 |
|---|---|
| Old photograph number: | B00484 |
| Caption: | Traprain Law (from the north), East Lothian. A phonolite laccolith of Visean (Lower Carboniferous) age. |
| Description: | Traprain Law (from the north), East Lothian. A phonolite laccolith of Visean (Lower Carboniferous) age. This prominent hill with its iron-age fort is made of phonolite, similar to that of North Berwick Law (photos B00491, B00493). However, it is believed not to be a volcanic vent but a laccolith, intruded roughly parallel to the bedding of the enclosing Ballagan Formation (Inverclyde Group, Tournaisian) siltstones, sandstones and cementstones. The laccolith is about 1.2 km. long by 0.6 km. wide, and elongated in an east-north-east direction. Glacial erosion has produced a significant crag-and-tail topography. Smaller intrusions of phonolite, possibly feeders, occur nearby. The low hills to the left are made of lavas of the Garleton Hills Volcanic Formation. |
| Date taken: | Fri Jan 01 00:00:00 GMT 1892 |
| 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: | 358200 |
| Y latitude/northing: | 674600 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 202.13 KB; 1000 x 737 pixels; 85 x 62 mm (print at 300 DPI); 265 x 195 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images, Geoscience subjects/ Igneous features/ Bosses and laccoliths |
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