Sub aerial processes
- Created by: emilyidek
- Created on: 29-05-18 16:58
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- Sub-aerial processes
- Mechanical weathering
- Freeze-thaw weathering - Where water enters cracks, freezes, leading to expansion of cracks
- Temperature changes - The repeated expansion and contraction of rocks wears the rock away
- Biological weathering
- Animal related: Animals can burrow into rocks (especially soft rocks)
- Plant related: Seaweed help prise away rocks and some algae secret chemicals
- Chemical weathering
- Solution - Where acidic water leads to the breakdown of carbon-based rocks
- Oxidation - Where hydroxides/oxides are formed, and lead to the wearing away of the rock
- Hydrolysis -Where mildly acidic water reacts with rocks to create salts which degrades the rock
- Carbonation - Where CO2 dissolves into seawater and reacts with CaCO3 to create calcium bicarbonate which dissolves easily
- Mass movement
- Landslides - Occur on soft cliffs where there is a failure
- Rockfalls - caused by undercut of the sea
- Mudflows - Where soil becomes saturated with rainwater and can become fluid and move downhill
- Rotational slip - Where soft material overlies resistant material and collapses
- Mechanical weathering
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