Old Drift Mine Entrance | I have been meaning to explore ...
Dec 24, 2011· I have been meaning to explore this place for quite a while and get a few pictures..... The Sandwith Anhydrite Mine (28999) formed an important, if physically separate, element of the Marchon Site from the 1950s to the 1980s, providing the raw material for the anhydrite process of manufacturing sulphuric acid and cement. The mine worked anhydrite beds in the Permian marls beneath the St .