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| Seven miles north of Pickering, the A169 passes close by a bowl shaped depression, 100 metres deep and over half a mile across. This is the Hole of Horcum, where the slopes of a glacial gorge through the Tabular Hills (along the valley floor) have been eroded by the action of springs and their streams. Because there is hard sandstone and limestone on the upper slope, it is characteristically steep, with softer rock below eroding with a shallow slope. |