Zig-zagging short, deep runnels in limestone pavement
Unusually zig-zagging, short, deep runnels and long, deep grikes characterize the limestone pavement at Lancelot Clark Storth, adjacent to Hutton Roof, South Cumbria. Deep dissolution hollows or 'kamenitzas' are forming across the surface.
Limestone pavements were formed during the last Ice Age in the Pleistocene period when moving glaciers scoured bare the surface of the underlying limestone bedrock. The classic pattern of clints (blocks) and grikes (fissures) was produced by the erosive action of overlying soil - such as the moraine deposited by the glacier - and the rainwater that permeated it, enlarging the natural faults in the limestone rock.
Date taken: 26 September 2014.