Surges in glacial movement are probably related to unusually fast rates of basal sliding.

Name: Surges in glacial movement are probably related to unusually fast rates of basal sliding.
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Surges in glacial movement, where glaciers can advance several meters per day, are believed to be caused by rapid rates of basal sliding, or the movement of glaciers over their beds. This can be triggered by changes in meltwater lubrication or changes in the bedrock underneath the glacier.

Surges in Glacial Movement Are Probably Related to Unusually Fast