There are two main types of weathering:
* Physical weathering: This involves the breakdown of rocks into smaller pieces without changing their chemical composition. Examples include:
* Frost wedging: Water freezes in cracks in rocks and expands, putting pressure on the rock and breaking it apart.
* Abrasion: Rocks are worn down by the friction of other rocks, wind, or water.
* Thermal expansion and contraction: Rocks expand when heated and contract when cooled. This repeated expansion and contraction can cause the rock to crack and break.
* Chemical weathering: This involves the breakdown of rocks by chemical reactions. Examples include:
* Oxidation: The reaction of minerals in rocks with oxygen, often forming iron oxides which are weaker than the original minerals.
* Carbonation: The reaction of carbonic acid (formed from carbon dioxide dissolved in water) with minerals in rocks, dissolving some of the minerals.
* Hydrolysis: The reaction of water with minerals in rocks, breaking down the minerals into other compounds.
The sediments produced by weathering are then transported and deposited, eventually forming sedimentary rocks.
