| P number: | P206657 |
|---|---|
| Old photograph number: | A06728 |
| Caption: | Low Lord and Hunter Levels, Burlington Quarries, Kirkby in Furness, Lancashire. Looking south-west. |
| Description: | The metamorphic blue-grey slates of Kirby Moor have been worked for roofing slate since Roman times. The best quality slate occurs where the cleavage is perpendicular to bedding. The long history of quarrying has meant that the deep slate quarries posed many problems of access for the slate workers. The difficulties of raising the large blocks from the deeper working levels to the the surface where the slate could be processed into thin roofing slates was overcome using a series of inline horse drawn railway tracks and water balance lifting devices. The slate is used both for roofing and as decorative cladding. The slates were formed during the Early Devonian when a slaty cleavage was imposed on the Ordovician and Silurian rocks of the area. The best quality slate with the most even and regular cleavage was formed from the lithologically uniform mudstone successions. |
| Date taken: | Thu Aug 01 00:00:00 BST 1935 |
| Photographer: | Rhodes, J. |
| Copyright statement: | Crown |
| X longitude/easting: | 322500 |
| Y latitude/northing: | 482500 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 377.07 KB; 1001 x 715 pixels; 85 x 61 mm (print at 300 DPI); 265 x 189 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images, Geoscience subjects/ Economic geology/ Slates |
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