Waterfall

• 1. The river flows over hard and soft rock. When river gets to the soft rock it will erode through the process, differential erosion.
  2. Next the water goes off the edge and creates a plunge pool. This is formed by hydraulic action and abrasion.
  3. The turbulence of the water undercuts the softer rock so it creates a cave behind the waterfall.
  4. Overtime, this keeps happening and retreats upstream. This then forms a gorge, which is a long narrow channel where a waterfall has eroded.
• Differential erosion - used to describe erosion that is occurring at different rates, this is often caused by either geology or available energy