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Uploaded on:
09/03/2009 08:06:25
Digital Asset
File Size:
241.98 KB
1000 x 688 pixels
1172 views 4 downloads
P number: P208255
Old photograph number: A08333
Caption: Collyweston Slate, just north-east of Collyweston, east of Kettering - Stamford road, Northamptonshire.
Description: The Collyweston Slate were obtained from a thin silty limestone unit at the base of the Lincolnshire Limestone Formation. The slates were worked in shallow mines in the local area and are still commonly seen on houses in Stamford and its surrounding villages. The Collyweston Slates which were worked principally in an extensive series of underground galleries. The blocks of limestone quarried were brought to the surface and laid out in fields over winter for 'frosting'. In the following summer the slates could then be riven into thin sheets and dressed into roofing slate. These slates are the only source of roofing material worked in the Lincolnshire Limestone Formation. Though widely worked in the past via a series of shallow shafts they are now, like many other Middle Jurassic stone slates in short supply.
Date taken: 01/05/1949
Photographer: Rhodes, J.
Copyright statement: Crown
X longitude/easting: 499895
Y latitude/northing: 302791
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 241.98 KB; 1000 x 688 pixels; 85 x 58 mm (print at 300 DPI); 265 x 182 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Economic geology/ Slates  


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