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Uploaded on:
05/03/2009 11:08:20
Type:
Digital Asset
File Size:
377.07 KB
Dimensions:
1001 x 715 pixels
1268 views 6 downloads
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: 01/08/1935
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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