From Glossary of Meteorology


The reduction of stone to small particles through any natural action such as frost action (crevices formed through alternate freezing and thawing); biochemical action of plants, trees, and organisms growing in rocks; wind corrosion (a natural phenomenon akin to sand blasting); ocean wave action; glacial scouring; and tectonic action (the shearing and jointing of rocks caused by stresses in the earth's crust).

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