Glacial Pothole Landscape
Reference work entry
Meltwater can percolate into a glacier along crevasses, and when it reaches the bedrock, a layer of pressurised water can form and flow at a maximum speed of 200 km per hour along the contact between the glacier and the rock. The pressurised water washes the rock and forms a vortex loaded with gravel, which swirls and abrades the bedrock. The abrasive action creates deep holes, which are called glacial potholes because they look like rice-grinding mortars (Fig. 12).
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