Austwick boulders erosion erratic geographical geological glacial glacial-effects glacial-debris gritstone limestone

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Photo credit: © John Cleare / Alamy / Afripics
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Keywords: austwick, boulders, dales, england, erosion, erratic, geographical, geological, glacial, glacial-debris, glacial-effects, glacial-erratic, gritstone, ice-age, landform, limestone, norber-erratics, pennines, rock-feature, yorkshire