Tregonning Hill. Looking N. Old china clay-pit. Part of the old china clay workings in the kaolinised granite of Tregonning Hill on or near the site of the first china clay workings in Cornwall. Steep narrow quartz and greisen veins cut the altered granite. Photo P006026 Reproduced with the permission of the British Geological Survey ©NERC. All rights Reserved
This photograph is by carnkie and was uploaded December 12th 2009. © carnkie please do not copy or distribute without prior express permission.
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