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A glacier erodes by the following processes:
- Plucking: the physical plucking of rocks from the rock face beneath it by freezing around it, then moving forwards, pulling it with it.
- Abrasion: the scraping of a rock entrained within the glacier against the rock face
- Removal: rocks can be entrained within the glacier, at the sides, in the middle or at the bottom and are transported by the processes listed below
Do not confuse the following with erosion:
- Rotational slip: related to erosion closely. This is where the corrie glacier rotates round in the hollow, carving it out, but the actual erosion is done by the processes above
- Glacial movement: a glacier moves by four processes: rotational slip, basal slippage, internal deformation and due to gravity. This is not the physical erosion of the rock, but just the way in which the glacier moves.
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How does a glacier affects the land?
A glacier can completely reshape the land. As it is made of very heavy ice, this ice can erode surfaces from the debris and rocks that it carries and the amount of pressure it places on the surface beneath it during its movement.
What process Do glacier erode the land?
When a glacier melts, it deposits the sediment it eroded from the land, creating various landforms.
What are two processes by which glacier erode the land?
Plucking and Abrasion.
What determines the rivers ability to erode the land beneath it?
Type of land surface, speed and volume of water.
How can a iceberg create weathering?
As an iceberg - or glacier - moves across land, it will scrape against it, causing it to weather/erode the land.
How is a glacire formed?
glacier are river of ice which to erode the land scape by bulldozing soil and stones to expose the solid rock below.
What two forms of water that can erode the earth?
glacier and moraine
How can glaciers erode rocks?
The glacier can carry rocks. The moving of the glacier.
Abrasion and plucking involves what part of glacier?
The base of the glacier, where it is in contact with the rocks beneath it.
Why is freeze thaw weathering absoloutely vital if a glacier is going to be able to erode its valley?
Its to do with how it is able to form the glacier. There is a cylce where the ice can only cycle round and round if freeze thaw weathering is taking place, meaning that a glacier can erode its valley. The process of freeze thaw weathering erodes the valley.
How do glaciers move boulders?
As a glacier or ice sheet moves, it can erode bedrock. The ice can then pick up, or entrain, the eroded rock. As the ice flows, it transports the bedrock debris in the direction of flow.
What are 2 ways glaciers erode the land?
The two processes are abrasion and plucking.What processes lead to glacial erosion? Describe them.The two main processes that lead to glacial erosion are plucking and abrasion. Plucking is the process by which a glacier picks off rocks as it blocks over the land. The rock fragments freeze to the bottom of the glacier, gouging and scratching the bedrock as the glacier advances in the process of abrasion.
