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Erosion by Glaciers. Like flowing water, flowing ice erodes the land and deposits the material elsewhere. Glaciers cause erosion in two main ways: plucking and abrasion. Plucking is the process by which rocks and other sediments are picked up by a glacier. They freeze to the bottom of the glacier and are carried away by the flowing ice.
Weathering is the process that breaks rocks down into smaller pieces. Weathering can be caused by: wind, rain, ice, running water, plant roots, chemicals, freezing and thawing. Erosion is the movement of rock pieces from place to place. Erosion can be caused by: wind, rain, running water, waves, gravity, and moving ice.