Geographical Occurrence
Rocks assigned to the Millstone Grit Group occur over a wide area of Northern England where they are a hugely important landscape-forming element of the rock succession. They also occur in parts of northeast Wales. The group comprises a succession of sandstones, mudstones and siltstones, the specifics of the sequence varying from one area to another. They give rise both to a number of ‘edges’ and a series of high plateaux throughout the region, many of which are of considerable cultural significance.
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