From memory, one used to be able to view very good examples of slickenside in the rock that outcropped in the side of the opencast working of Low Mine, Bonsall, Derbyshire. This mine is found on the western end of the Great Rake (also known as Bacon Rake) and is located on the footpath that goes from Bonsall Cross to Matlock Bath over the top of Masson Hill. Another mine on the Great Rake (Side Mine, Matlock Bath) situated at the eastern end of the rake also had excellent examples of slickenside, but these were underground. I remember seeing them when Derbyshire Stone was working Side mine in the mid 1950's and we were able to explore the mine.
Margaret Howard
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