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Glacial Landscapes - Coggle Diagram
Glacial Landscapes
Shaping the land.
Last Ice Age happened around 18,000yrs ago.
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Erosion
Abrasion
As the glacier moves downhill, rocks that have been frozen into the base and sides of the glacier scrape the rock beneath. The rocks scrape the bedrock like sandpaper, leaving scratches called striations behind.
Plucking
Rocks become frozen into the bottom and sides of the glacier. As the glacier moves downhill it 'plucks' the rocks frozen into the glacier from the ground.
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Weathering
Freeze - thaw Weathering
Is the main type of weathering. During the day when temperatures are higher, the snow melts and water enters cracks in the rock. When the temperature drops below 0°C the water in the crack freezes and expands by about 9%. This makes the crack larger. As this process is repeated through continual thawing and freezing the crack gets larger over time. Eventually pieces of rock break off.
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