Glacial erosion

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Plucking is

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11 Terms

1

Plucking is

Meltwater in the glacier freezes onto rocks and as the ice moves forwards it plucks or pulls out large pieces of rocks

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2

Glacial Abrasion is

When rock is frozen to the base the back of glacier scrapes at the bedrock and act like sandpaper which erodes the bedrock

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3

How did glaciers move

• snow builds up

• snow compacts into ice

• ice flows down mountainsides

• pressure at the bottom creates meltwater

• erode valley floor

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4

Glacial deposition

Glaciers leaving behind glacial till as they move and melt.

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5

Deposition features caused by glaciers

• moraines

• drumlins

• erratics

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6

How is a corrie formed

Plucking and freeze thaw weathering

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7

How are arêtes formed

When two corries form side by side separating two glaciers

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8

Pyramidal peak

Three or more corries form in hollows on all sides of a mountain

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9

How do glaciers affect upland river valleys

V shaped valleys to U shaped volleys through plucking and abrasion

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10

Economic activities in glaciated upland areas

• quarrying

•farming (animals)

•forestry

•tourism

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11

Land use conflicts in glaciated upland areas

• Reservoirs

• wind turbines

• hunting

• forestry

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