“exfoliation”的概念、定义、翻译、参考文献-科学参考

exfoliation

Geology and Earth Sciences

Weakening and separation of the surface layers of rock as a result of chemical or (possibly) thermal weathering, or of pressure release due to erosion. The decomposition of biotite and hydration of feldspar in granite causes swelling that may lead to failure. Expansion and rock fracturing may also result from temperature change (although this is questioned by many geologists), and sheet failure may result from the release of internal stress in massive rocks when an overburden is removed. See also thermoclastis.

Geography

The sheeting of rocks and their disintegration, thought to be due to thermal expansion, at least on small structures. Waragai (1998) Arct. Alp. Res. 30 finds that high rates of change in rock temperature may produce exfoliation sheets in periglacial environments. Le Pera and Sorriso-Valvo (2000) Geomorph. 34, 3–4 think exfoliation boulders, now found at the ground surface, may have been formed at depth.

单词	exfoliation
释义	exfoliation Geology and Earth Sciences Weakening and separation of the surface layers of rock as a result of chemical or (possibly) thermal weathering, or of pressure release due to erosion. The decomposition of biotite and hydration of feldspar in granite causes swelling that may lead to failure. Expansion and rock fracturing may also result from temperature change (although this is questioned by many geologists), and sheet failure may result from the release of internal stress in massive rocks when an overburden is removed. See also thermoclastis. Geography The sheeting of rocks and their disintegration, thought to be due to thermal expansion, at least on small structures. Waragai (1998) Arct. Alp. Res. 30 finds that high rates of change in rock temperature may produce exfoliation sheets in periglacial environments. Le Pera and Sorriso-Valvo (2000) Geomorph. 34, 3–4 think exfoliation boulders, now found at the ground surface, may have been formed at depth.
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