why do valley glaciers erode and deposit material?
Answers
Answer:
Glaciers erode the underlying rock by abrasion and plucking. Glacial melt water 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). With the weight of the ice over them, these rocks can scratch deeply into the underlying bedrock making long, parallel grooves in the bedrock, called glacial striations.
Glacial striations point the direction a glacier has gone.
Mountain glaciers leave behind unique erosion features. When a glacier cuts through a ‘V’ shaped river valley, the glacier pucks rocks from the sides and bottom. This widens the valley and steepens the walls, making a ‘U’ shaped valley
Explanation: