Occurs mostly at the base of a glacier and to an extent at the side. It is most effective in jointed rocks or those weakened by freeze-thaw. As the ice moves, meltwater seeps into the joints and freezes onto the rocks, which is then ripped out by the moving glacier.
At its simpliest form, this processes involves the glacier freezing onto rock outcrops, after which ice movement pulls away masses of rock. In reality, as the strength of the bedrock is greater than that of ice, it would seem that only previously loosened material can be removed. Plucking generally creates a jagged-featured landscape.
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