1.2.5 Processes of glacial weathering, erosion and the characteristics and formation of associated landforms

Activity 2

Main Question

What factors affect the processes of glacial erosion?

Questions

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Study the photograph of Cwm Idwal (Resource A).Suggest what evidence is here to justify the description of Cwm Idwal as “an excellent example of a cirque”..

Use the Ordnance Survey extract ( Resource C) or on website http://www.magic.gov.uk/ to:

  1. Record the orientation of the cirques listed in Resource B.
  2. Construct a rose diagram (Resource D) to show the orientation data.
  3. Describe the pattern of cirque orientation and suggest possible climatic reasons for the pattern observed.

Suggest and justify other factors that could affect the orientation of cirques.

Use an Ordnance Survey map to note other landforms in this area which show evidence of glacial processes.