Types of Weathering and Erosion
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- Created on: 17-04-19 14:56
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- Weathering and Erosion
- Mechanical Weathering
- Freeze-Thaw - Water freezes in cracks, heats to form water and expands.
- Salt weathering- build up of salt crystals in cracks.
- Chemical weathering
- change of chemical compostion
- Carbonation weathering- Carbon dioxide > Weak carbonic acid
- Acid will react to rock containing calcium carbonate.
- Biological weathering - Breakdown due to living things.
- Mass Movement
- Rocks and loose material down a slope.
- Coastal areas retreat.
- Rock full of water- heavier and more prone to mass movement.
- Material can be undercut.
- Slide- Straight line. Slump - Curved, rotated shift.
- Erosion
- Hydraulic action- air compressed in cracks due to wave force.
- Abrasion- particles rub against the bed wearing away small pieces.
- Solution- CO2 Chemically reacts with chalk and limestone to dissolve them.
- Attrition- particles smash into each other. Rounded edges & smaller.
- Mechanical Weathering
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