Uploaded on:
26/12/2012 09:57:05
Digital Asset
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255.07 KB
784 x 999 pixels
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P number: P804147
Caption: Grey Lake Quarry, Camelford. North Cornwall, April 12th 1914.
Description: This rock is a grey porphyritic quartz felsite being coarse grained in the centre with large phenocrysts of pink and yellowish orthoclase feldspar crystals but at its contact with the granite or sediment it is a very fine grained crypto crystalline rock which shows flow lines and spherulites. [Person].
Copyright statement: NERC
Additional information: From the Geologists' Association Carreck Archive. The Reader Geological Photographs. Long excursions 1914. Part 1.
Orientation: Portrait
Size: 255.07 KB; 784 x 999 pixels; 66 x 85 mm (print at 300 DPI); 207 x 264 mm (screen at 96 DPI);
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Categories: Special collections/ Geologists' Association 'Carreck Archive'/ T W Reader geological photographs, long excursions 1914. Part 1  


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