River Erosion Flashcards

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What is attrition?
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Attrition is when sediment particles knock against the bed or each other and break, becoming more rounded and smaller as you move down the river.

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What is attrition?
What is abrasion?
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Abrasion, also known as corrasion, is when boulders and stones wear away the river banks and bed. Angular rocks that have entered the channel recently are useful tools of abrasion because they are more angular. Abrasion is responsible for both lateral and vertical erosion of the river channel. 

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What is abrasion?
What is the main process of erosion in the upper course of a river?
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Hydraulic action

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What is the main process of erosion in the upper course of a river?
What is vertical erosion?
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Vertical erosion involves the wearing away and deepening of the river bed. This is mostly by hydraulic action. It is most common in the upper course of the river.

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What is vertical erosion?
Identify the four processes of erosion that occur within a river.
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Abrasion or corrasion, attrition, hydraulic action and solution or corrosion.

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Identify the four processes of erosion that occur within a river.




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