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The Geology of the Blue John Cavern, home of the Famous Blue John Fluorite - Mini Me Geology Blog
The Blue John Cavern is located in the Peak District in England near the town of Castleton, Derbyshire. The area of the cavern is formed within limestone strata that deposited in deep ocean waters millions of years ago. Layers of shale and some gritstone, a type of coarse sandstone common in this area, covered the limestone.
Tracy Diane Jones