The work of a river: Erosion Flashcards

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1
Q

What is erosion?

A

When the river removes material from the banks and bed of the river channel

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2
Q

Corrasion/abrasion

A

When smaller material carried in suspension rubs against the banks of the river

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3
Q

Where is corrasion more likely

A

In lowland areas as by this time the material will be broken down small enough to be carried in suspension

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4
Q

Attrition

A

When boulders and other material transported along the river bed collide and break up into smaller pieces

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5
Q

When is attrition more likely?

A

When the river is still flowing in highland areas

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6
Q

What is solution/corrosion

A

When acids in the river dissolve rocks, such as limestone, which form the banks and bed

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7
Q

Hydraulic action

A

When the sheer force of the river dislodges particles from the river’s banks and bed

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8
Q

Where does vertical erosion happen?

A

Upper course

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9
Q

Where does lateral erosion happen?

A

Middle course

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10
Q

What is headward erosion?

A

The backward cutting of a waterfall

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