Erosional landforms

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  • Created by: Ali Bland
  • Created on: 17-03-15 14:12
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  • Erosional Landforms
    • Corries
      • An enlarged hollow on a mountainside
      • It has a steep back wall (often with a pile of scree at its base)
      • The hollow is generally very deep and may contain a small lake called a tarn
      • The front of a corrie often has a raised rock lip which helps to explain the presence of the tarn
    • Arêtes
      • Arêtes are formed when two neighboring glaciers cut back into a mountainside – each one eroding a corrie
        • This leads to the knife edge ridges called Arêtes
    • Pyramidal Peaks
      • Formed when three of more corries erode back-to-back and the ridge becomes an isolated peak
    • Glacial Trough (U-shaped valley)
      • Formed when a glacier moves downhill through a valley and changes the shape from a V-shaped to a U-shaped valley
      • They have steep sides and a flat bottom
      • Generally straight
    • Ribbon Lake
      • A ribbon lake is a large, narrow lake occupying a U-shaped valley
      • The water is collected from melt water and rain water after the glacier has melted
      • During glaciations the glacier erodes some parts of the valley floor more than others. (Often due to different strengths of the bedrock)
    • Hanging Valley
      • A hanging valley is a smaller side valley left "hanging" above the ,aom u-shaped valley
    • Misfit Stream
      • A river that is either too large or too small to have eroded the valley m which it flows
      • They run through the middle of the glacial trough
    • Truncated Spurs
      • Rounded areas of land which have been cut off
      • They're often rounded at the top but steep at the bottom
      • They are formed when glaciers move through the main valley and cut off spurs


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