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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.
Lesson Objectives. 1  Discuss the different erosional features formed by alpine glaciers. 2  Describe the processes by which glaciers change the underlying rocks. 3  Discuss the particles deposited by glaciers as they advance and recede. 4  Describe the landforms created by glacial deposits.lacial Erosion. Glaciers erode the underlying rock by abrasion and plucking. Glacial meltwater seeps into cracks of the underlying rock, the water freezes and pushes pieces of rock outward. The rock is then plucked out and carried away by the flowing ice of the moving glacier (Figure below).