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Uploaded on:
05/03/2009 00:56:22
Type:
Digital Asset
File Size:
431.72 KB
Dimensions:
1000 x 734 pixels
1171 views 4 downloads
P number: P204932
Old photograph number: A04989
Caption: Cottonfields Quarry, Isle of Portland, Dorset.
Description: The Isle of Portland is the source of England's pre-eminent and most easily recognisable building stone, the white oolitic limestone known as Portland Stone. Cottonfields Quarry is one of many quarries that have worked the stone for both local use and for export to other parts of the United Kingdom. The large block of limestone is from the Base Bed. This block measures 18.5 ft. x 3.5 ft. x 3 ft. and weighs about 9 tons. The stone has been split along a 'rising' or thin-bedding plane, picked out by layers of oyster shells. The limestone quarries of Portland Bill have been in operation since the Norman invasion. Most of the houses in the villages of the Isle of Portland are constructed of Portland Stone and many also still have large Purbeck Stone slates on their roofs.
Date taken: 01/04/1930
Photographer: Rhodes, J.
Copyright statement: Crown
X longitude/easting: 369500
Y latitude/northing: 72500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 431.72 KB; 1000 x 734 pixels; 85 x 62 mm (print at 300 DPI); 265 x 194 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Economic geology/ Building stones, limestone  

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