The causes of mechanical weathering include freezing and thawing, the release of pressure, plant growth, actions of animals, and abrasion.
What is mechanical weathering?
Mechanical weathering breaks rocks into smaller pieces. These small pieces are the same as large stones. They are just tiny! Rocks are crushed without changing their composition. Smaller pieces contain the same minerals in equal proportions. The phrase "chips from old blocks" can be used to describe mechanical weathering. The main players in mechanical weathering are water, ice and wind.
Intrusive igneous rocks form at depths of hundreds of meters to tens of kilometers. Sediments become sedimentary rocks only when they are buried in other sediments at depths of several hundred meters or more. Most metamorphic rocks form at depths of several kilometers to tens of kilometers.
Therefore, the causes of mechanical weathering include freezing and thawing, the release of pressure, plant growth, actions of animals, and abrasion.
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