English: Glacial erratic, Norber One of several hundred erratics which are spread across a low ridge at Norber, having been dumped there by a glacier which transported them from nearby Crummack Dale. This one sits nicely on a limestone plinth, and there is a theory that the erratics have protected the limestone underneath them from erosion. However there is some debate as to the natural erosion rate of the limestone compared to that which is protected.
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