Glacial erosional landforms

9 landforms

arete

pyramidal peak

corrie

tarn lake

glacial trough/ u shaped valley

hanging valley

truncated spur

rouche montenee

fjord

what do aretes look like and how are they formed

sharp narrow ridge

glacial erosion from both sides

critical analysis aretes and corries

last a long time- formed by erosion but unaffected by it once formed

what does a pyramidal peak look like and how is it formed

steep pyramidal peak

backwards erosion of Corrie glaciers on 3 or more sides

what does a Corrie look like

armchair shaped hollow with steep sides

how is a Corrie formed

nivation deepens hollow in side of a valley

snow collects in hollow and weight compresses to form ice

hollow deepened and widened through plucking and abrasion

rotational flow due to bowl shape

overdeepening leads to armchair shape and rock lip formed

what does a tarn lake look like

small lake occupying hollow

what does a glacial trough look like and how is it formed

U- shaped valley

erosion of strongly channeled ice

hanging valley characteristics and formation

tributary valley whose mouth ends abruptly part way up the side of a main valley

Inc glacial down cutting of main valley

hanging valley critical analysis

last a long time but can be eroded by waterfalls

truncated spur characteristic and formation

ridge that descends towards valley floor from high elevation that eroded at base by glacier width

rouche moutonee characteristic and formation

rocky hillock with gentle, smooth up valley facing slope resulting from glacial abrasion and steep, rough down valley facing slope from plucking

what is the up valley facing slope called

stass

what is the down valley facing slope called

lee

fjord characteristics and formation

long narrow arm of sea formed from glacial erosion

• glacial period lowers sea levels

• rock eroded below current sea levels

• interglacial= sea level Inc so lower part of glacier submerged under water

where can landforms be found in the world x6

Lake District

Switzerland

NZ

Wales

Scotland

Greenland

what can be found in Switzerland

pyramidal peak- matterhorn

glacial trough- Lautterbrunnen

rouche mouoenees- Bernese Alp

what can be found in NZ

hanging valley- Mitre Peak

what can be found in Wales

corrie- snowdonia

what can be found in scotland

truncated spur- devils point

what can be found in greenland

fjord- Josef fjord