Walkers pass over the limestone pavement at Ing Scar near Malham in the Yorkshire Dales National Park, on 12th April 2017, in Malham, Yorkshire, England. A limestone pavement is a natural karst landform consisting of a flat, incised surface of exposed limestone that resembles an artificial pavement. The term is mainly used in the UK where many of these landforms have developed distinctive surface patterning resembling paving blocks.
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