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Arêtes
By Shamiso Hatchard
What is an Arête?
An arête is a thin, knife-like, ridge of rock.
How are arêtes formed?
They are usually formed when two glaciers erode
  parallel U-shaped valleys. The arête is the ridge
  separating the two valleys.
They can also be formed when two corries
  (cirques) erode towards each other.
The edge is then sharpened by freeze-thaw
  weathering, and the slopes on either side are
  steepened by plucking.
Arêtes Around the World
      Clouds Rest is a mountain in
        Yosemite Village in
        California, USA.



      Striding Edge is part of the
        Helvellyn mountain in the Lake
        District in England.
Arêtes Around the World (cont)..
             The Sawtooth is joins onto
               the Mount Bierstadt in
               Colorado, USA.



             The Garden Wall is in the
               Glacier National Park in
               Montana, USA.
QUESTIONS!
1. What is an arête?

2. Name 2 famous arêtes around the world.

3. Describe one way an arête can be formed.

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Arêtes

  • 2. What is an Arête? An arête is a thin, knife-like, ridge of rock.
  • 3. How are arêtes formed? They are usually formed when two glaciers erode parallel U-shaped valleys. The arête is the ridge separating the two valleys. They can also be formed when two corries (cirques) erode towards each other. The edge is then sharpened by freeze-thaw weathering, and the slopes on either side are steepened by plucking.
  • 4. Arêtes Around the World Clouds Rest is a mountain in Yosemite Village in California, USA. Striding Edge is part of the Helvellyn mountain in the Lake District in England.
  • 5. Arêtes Around the World (cont).. The Sawtooth is joins onto the Mount Bierstadt in Colorado, USA. The Garden Wall is in the Glacier National Park in Montana, USA.
  • 6. QUESTIONS! 1. What is an arête? 2. Name 2 famous arêtes around the world. 3. Describe one way an arête can be formed.