erosional features
Post on 19-Jul-2015
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Erosional Features
Improvement Notes
WaterfallHeadword 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 •
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
V Shaped Valley / Interlocking Spurs
Rapids
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