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Erosional features
- 1. Erosional Features Improvement Notes
- 2. Waterfall Headword Retreat Hydraulic Action and attrition Vertical Erosion • Landform occurs when there is a sudden change in gradient • Resistant band of rock across the top causing an overhang • Undercutting at the foot of the erosion causes the overhang to eventually collapse. Thus causing headword erosion. A gorge is left behind. • This usually occurs at the top course along a rivers long profile •
- 3. Pothole • Potholes are cylindrical holes in the river bed • They are present were there is turbulent, high velocity water. The water usually has pebbles in suspension. • The holes are drilled by vertical erosion through hydraulic action and attrition
- 4. V Shaped Valley / Interlocking Spurs
- 5. Rapids