GLACIAL EROSION AND TRANSPORT

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Last updated 5:17 PM on 4/22/26
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9 Terms

1
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how do glaciers erode

plucking and abrasion

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plucking

glacier flow loosens and lifts rocks from the glacier bed; meltwater penetrates the cracks and joints of bedrock beneath a glacier and freezes

3
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abrasion

acts like sandpaper smoothing and polishing the underlying rock surfaces; rock pieces frozen to the base of a glacier scour the landscape; produces striations, polish, and rock flour

4
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glacial striations

grooves in the bedrock

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glacial polish

smoothed shiny bedrock

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rock flour

pulverized rock

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glacial flow

result of internal deformation and basal sliding

8
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internal deformation

movement within the ice; when ice is over 50km thick it behaves plastically and flows

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basal sliding

ice slides over the underlying surface; often enabled by meltwater at the base acting as a lubricant enhancing sliding motion