Processes

• Freeze-thaw weathering

  • water collects in the rock
  • The water freezes and expands by 9% weakening the rock
  • Overtime this repeats and fragments of rock break off
• Abrasion - rocks frozen to the glacier scrape and scour away at the valley floor and sides
• Plucking - When the glacier freezes onto a loose piece of rock and then pulls it away as it moves