(i) Hydrolysis.
(ii) Solution.
(iii) Oxidation.
(iv) Carbonation.
(v) Hydration.
1. Oxidation- Takes place in rocks that contain iron. The iron combines with oxygen forming iron oxides. Such rocks change colour and crumble easily. Iron combines or reacts with oxygen.
2. Hydration– Certain minerals absorb water and expand.These causes internal stress in the rock and it eventually disintegrates
3. Carbonation– Rain water absorbs carbon dioxide in the air to form a weak carbonic acid.The rain water percolates through joints in the limestone rocks.The water reacts with (CaCO3) calcium carbonate in the limestone rocks to form a solution of calcium bicarbonate.The solution makes the rocks weather leading to breakage.
4. Hydrolysis- In tropical humid areas with igneous rocks that contains feldspar mineral elements e.g. Granite.Hydrogen ions in the water reacts with rock minerals break down completely to make insoluble precipitates of day, weakening and breaking the rock.
5. Solution– It occurs in rocks with minerals that are soluble in water e.g Trona.The minerals dissolves in water to form a solution.Dissolved minerals are washed away in solution making the rocks weaker eventually causing them to break up.
maurice.mutuku answered the question on June 6, 2017 at 09:01
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