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  • Waterfall
    • 1. Falling water and boulders loosen and wear away the softer rock
    • 2. The hard rock above is undercut as erosion of the soft rock continues
    • 3. The hard rock collapses into the plunge pool to be broken up and washed away by the river
      • The position of the falls moves back
    • 4. Erosion continues and the waterfall slowly eats its way upstream, leaving a gorge behind


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