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Physical Environments 1Loading...
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LITHOSPHEREGLACIATION
Higher
Geography
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GLACIAL LANDSCAPES
Formation of erosional and depositional features in glaciated landscapes:
1. Corrie
2. Arête
3. Pyramidal peak
4. U-shaped valley
5. Hanging valley
6. Ribbon lake
7. Drumlin
8. Esker
9. Terminal moraine
1. Corrie
2. Arête
3. Pyramidal peak
4. U-shaped valley
5. Hanging valley
6. Ribbon lake
7. Drumlin
8. Esker
9. Terminal moraine
GLACIAL FORMATION
1. I can explain how a glacier is formed:
Form in a North facing hollow as more shade (1)
When more snow falls in winter than melts in the summer (1)
Snow compresses to form neve and then glacial ice (1)
Moves downhill due to its own weight and gravity (1)
Form in a North facing hollow as more shade (1)
When more snow falls in winter than melts in the summer (1)
Snow compresses to form neve and then glacial ice (1)
Moves downhill due to its own weight and gravity (1)
Can you watch the following sections:
Neve formation 5:37 – 7:54 minutes
Neve formation 5:37 – 7:54 minutes
https://www.twigscotland.com/film/glaciers-1096/
2.39 minutes
2.39 minutes
GLACIAL PROCESSES
2. I can explain how a glacier erodes and shapes the landscape by the processes of:
1.Plucking
2.Abrasion
3.Freeze - Thaw
1.Plucking
2.Abrasion
3.Freeze - Thaw
1 – Plucking:
when ice freezes onto bedrock and rips this out (1) making the valley / corrie steeper (1).
when ice freezes onto bedrock and rips this out (1) making the valley / corrie steeper (1).
2 – Abrasion:
when angular rock embedded in the glacier grinds the bedrock (1) making it deeper (1).
when angular rock embedded in the glacier grinds the bedrock (1) making it deeper (1).
3 - Freeze – Thaw:
water in rock cracks expands when it freezes (1), repeated expansion weakens and breaks the rock (1).
water in rock cracks expands when it freezes (1), repeated expansion weakens and breaks the rock (1).
1. Corrie
Rotational sliding over deepens the central part of the hollow (1)
Friction causes ice to slow at the front edge allowing a rock lip to form (1)
Once the glacier has melted this hollow can fill with water to form a Corrie Loch or Tarn (1)
An example of this is Red Tarn in the Lake District (1)
Friction causes ice to slow at the front edge allowing a rock lip to form (1)
Once the glacier has melted this hollow can fill with water to form a Corrie Loch or Tarn (1)
An example of this is Red Tarn in the Lake District (1)