Glacial landscapes

Formation of a corrie

-snow begins to build up in a small hollow, and turns into ice

-freeze thaw weathering and plucking loosens and removes material from the back of the hollow creating a steep back wall

-rotational slip creates hollow

-moraine deepens the hollow by abrasion

-rock lip: deposition of moraine

Characteristics of a corrie

arm chair shaped hollow with steep back wall, sometimes filled with water (tarn)

Formation of a U shaped valley

abrasion and plucking

Abrasion

sandpapering effect, rocks rub and scrape against the ground breaking into pieces and become smoother

Plucking

ice freezes to the rock and tears parts of it away when it moves

Attrition

rocks collide and break into smaller pieces and become more rounded

Terminal moraine

formed at the furthest point reached by a glacier, max advance

Lateral moraine

sides of a glacier

Medial moraine

centre, form when two glaciers meet and lateral moraines combine

Ground moraine

beneath the glacier ice as it moves across the land