Waterfall

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Waterfalls

  • Soft rock erdoes quicker than hard rock because the soft rock is less resistant
  • Hydraulic action erodes the soft rock and leaves the hard rock as over hang and gets bigger
  • Hydraulic action starts to form a plunge pool
  • Gravity causes over hang to collapse into plunge pool 
  • The waterfall retreats up stream and the process continues
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Pot Holes

  • Formed in the upper course
  • Cylindarical holes drilled into the rocky bed of a river by turbulent high velocity
  • Water loaded with pebbles
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