Erosional Processes Flashcards

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1
Q

Processes

A

Abrasion
Glacial Plucking
Meltwater Erosion

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2
Q

What does plucking consist of?

A

Glacial joints widened by erosion
Loose material entrained

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3
Q

What are the primary influences on plucking?

A

Geology
Ice pressure
Meltwater

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4
Q

Plucking influences - Geology
Ice Pressure
Meltwater

A

G - Resistance, joints/faults, permeability
IP - Basal pressure causes basal melting + entrainment
M - Pressure of stoss side reduces frictional resistance that
holds rock in place

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5
Q

What is abrasion?

A

Erosion by individual stones/clasts
Results in rock fragmentation + surface scarring

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6
Q

What are the primary influences on abrasion?

A

Clasts - Quantity, sharpness, hardness
Lithology - Jointing + overall hardness

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