Meteorology and Weather
Erosion and Weathering

How do freezing temperatures cause rock weathering?

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February 27, 2010 10:26PM

Frost wedging occurs when liquid water flows into rock cracks and crevices and then expands upon freezing. The wedging creates a deeper or larger crack which can then be further expanded by additional frost wedging. Additionally, the frost wedging creates additional rock surface which can then be attacked by chemical weathering, mainly by the natural acidity of rainwater.