Erosional landforms
Erosional landforms formed by glaciers
- Created by: emily_w
- Created on: 07-05-14 16:18
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- Erosional Landforms
- Arete
- two glaciers erode the rock between them, forming a steep, narrow ridge
- separates 2 U-shaped valleys
- Image
- Pyramidal peak
- glaciers are not often found alone
- can be 3 on one mountain
- glaciers erode backwards into each other
- rock between each glacier is an arete
- forms a pyramidal peak
- The Matterhorn, Switzerland
- glaciers are not often found alone
- U-shaped valley/glacial trough
- powerful glaciers can erode whole valleys
- U-shaped valleys have steep sides and a flat floor
- plucking takes place on the sides, making them steep
- abrasion happens on valley floor, making it flat
- Corrie
- less erosion at snout of glacier, moraine deposited
- rock scooped out through rotational erosion
- at the start of a glacial period, snow collects in a shallow dip in the mountainside
- forms a small corrie glacier
- creates raised lip of rock
- rock scooped out through rotational erosion
- rock scooped out through rotational erosion
- at the start of a glacial period, snow collects in a shallow dip in the mountainside
- forms a small corrie glacier
- lip traps meltwater when glacier melts, forming corrie lake
- less erosion at snout of glacier, moraine deposited
- creates raised lip of rock
- can also be called a tarn, cirque or cwm
- less erosion at snout of glacier, moraine deposited
- corrie lakes are very deep and have a steep back wall
- corrie in the Lake District
- less erosion at snout of glacier, moraine deposited
- Truncated spurs
- valleys have interlocking spurs before the glacier
- rivers cannot erode hard rock, so they wind around it to form interlocking spurs
- glaciers can erode hard and soft rock
- after erosion, interlocking spurs are left truncated
- truncated spurs
- Hanging valley
- Big rivers have tributaries
- glaciers make the valley deeper and wider, leaving tributaries hanging
- waterfalls created after glacier melts
- Hanging valley in Yosemite national park
- Ribbon lakes
- glaciers find it difficult to erode soft rock but can easily erode hard rock
- rock basin formed when soft rock eroded
- water trapped in rock basin when glacier melts
- if moraine is deposited, it will help dam the lake
- ribbon lake
- Arete
- Image
- Corrie
- lip traps meltwater when glacier melts, forming corrie lake
- can also be called a tarn, cirque or cwm
- corrie lakes are very deep and have a steep back wall
- corrie in the Lake District
- lip traps meltwater when glacier melts, forming corrie lake
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