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Eduction (geology) : ウィキペディア英語版 | Eduction (geology)
In geology, eduction is a process in which the Earth crust spreads sideways, exposing deep-seated rocks. It is prominent in middle layers of the Himalayas, where gravity pushes the mountains down. Together with a high grade of erosion, this activity brings deep rocks to the surface, many from more than a depth of 100 km. The unusually fast elevation preserves rare metastable minerals, e.g. diamonds and coesite.〔(The Tibetan Plateau ) By Andrew Alden, About.com. Retrieved on April 12, 2009〕 ==See also==
*Desert pavement, describing other forms of surface rock formation.
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