Glacier erosion and transport - Glacier erosion and...

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Glacier erosion and transport Read First notes…missed 2 days 17/03/2008 21:23:00 Glaciers are the biggest components of erosion and transport Erosion = removing material Transport = moving materials How do glaciers erode? 1. Basal sliding (whole glacier is sliding over the surface) 2. Internal flow (inside of glacier 3 main processes of glacial erosion 1. Plucking – lifting of rocks from “bed” 2. Abrasion – sliding over bed smoothes the surface o Sediment within the ice is critical (or else, the ice will just melt and  nothing will happen) 3. Mass movements onto ice surface o Rockfall/rockslide Glacial erosion produces spectacular topography Cirque – steep valley created by glaciers (look at slide) Glacier transport lots of sediment In the ice and at the surface A wide range of grain sizes Moraines (lateral or medial) What do glaciers deposit material they carry?
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