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Erosion (Meanders and Ox-Bow Lakes (How Ox-Bow Lakes Form, Water flows…
Erosion
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Erosion and Deposition
Weathering is the breakdown of rock into small particles by physical, chemical and biological processes.
Erosion involves the removal of weathered material by the action of rivers,waves,wind and moving ice.These are called agents of erosion
Deposition is the laying down of solid material in the form of sediment such as mud and sand on a river bed or on the sea floor. Deposition is carried out by the agents of erosion and follows the erosion of the land and the movement of the resulting material
Wave-cut Platforms
- Wave erosion is greatest where waves break at the base of a cliff --> undercutting.
- This is where a wave-cut notch forms.
- Wave action happens between foreshore (low water level) and back-shore (high water level) = wave attack zone
- Continuous undercutting = cliff
- Cliff eventually collapses = cliff retreat
- Gentle, sloping platform left behind = wave cut platform
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Waterfalls and Rapids
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-When a layer of hard rock lies across a rivers course, the softer rocks down stream are eroded away quicker than the hard rock.
FloodPlain
Its formed by both erosion and deposition.
It's a wide flat area and land surrounding the river.
During a flooding, as the river spills onto the surrounding land, the water speed is reduced.
This result in a lost of energy which causes deposition of large quantities of sediment.
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The Difference between Weathering, Erosion and Deposition
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