59. Geology of Hadrian's
The geology of Hadrian's Wall falls naturally into three sectors: in the East the wall is over Upper Carboniferous Coal Measures and Millstone Grit; the Central Section is underlain by Lower Carboniferous intruded by the Great Whin Sill and in the Western sector the Wall crosses the New Red Sandstone. Glacial drift is widespread. All three sectors are described with specific sites in detail.
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