Earthwatcher's photos with the keyword: geo:lon=-1.787963

This photo shows part of the modern open quarrying for fluorite and barytes along the line of Dirtlow Rake near Castleton, on the site of the former Hollandtwine Mine. This is a rather special place. On the far north-west wall, the quarrying has cut a perfect cross section through a cave system. There are vertical vein cavities with horizontal fluting. The photo shows a portion of one of these. The vein cavities are associated with a meandering horizontal passage about 20 m below the original ground level. This passage must have been a phreatic tube at one time - entirely below the water table. The scalloping seen in the supplementary photos is a typical solution feature seen in these sort of tubes. This quarry has enabled us to see karst (solution) and periglacial features that would normally only be accesible to cavers. I would hope that some of this quarry face would be preserved, but my understanding is that the whole lot will be backfilled and grassed over, so we will end up with a tidy, bland, green grassy area which tells us nothing at all. :-( But I suppose it will keep the planning authorites happy.