Some geology additions to the Buxton collections show volcanic events in the making of the local geology and gave a great excuse (as if one was needed!) to get out and explore to see where they came from. Some of the new specimens came from Cressbrook Dale, a dramatic limestone dale near Litton dominated at the top end by the imposing Peter’s Stone. At various times there’s been volcanic activity at a number of centres in the White Peak, which include Tunstead, Matlock, Alport and Eyam Edge. Not necessarily large volcanoes, these could have been areas of vents and fissures under the shallow sea that covered the area at the time, and from which lava flowed or material was ejected to produce falls of ash. This led to layers or intrusions of lava flow and tuff inside the limestone.
In Cressbrook Dale these outcrop where the rocks have been worn away.
The picture above shows the North end of Cressbrook Dale and another feature of…
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