Glacial erosion

Plucking is

Plucking is

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

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

How did glaciers move

• snow builds up

• snow compacts into ice

• ice flows down mountainsides

• pressure at the bottom creates meltwater

• erode valley floor

Glacial deposition

Glaciers leaving behind glacial till as they move and melt.

Deposition features caused by glaciers

• moraines

• drumlins

• erratics

How is a corrie formed

Plucking and freeze thaw weathering

How are arêtes formed

When two corries form side by side separating two glaciers

Pyramidal peak

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

How do glaciers affect upland river valleys

V shaped valleys to U shaped volleys through plucking and abrasion

Economic activities in glaciated upland areas

• quarrying

•farming (animals)

•forestry

•tourism

Land use conflicts in glaciated upland areas

• Reservoirs

• wind turbines

• hunting

• forestry