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epidote-amphibolite facies |
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epidote-amphibolite faciesOne of the major divisions of the mineral facies classification of metamorphic rocks, encompassing rocks that formed under moderate temperature (500–750°F, or 250–400°C) and pressure conditions. This facies grades into the greenschist facies under less intense metamorphic conditions and into the amphibolite facies with greater temperature and pressure. Typical minerals include biotite, almandine garnet, plagioclase, epidote, and amphibole. Chlorite, muscovite, staurolite, and chloritoid may also occur. epidote-amphibolite facies [¦ep·ə‚dōt am′fib·ə‚līt ‚fā·shēz] (petrology) Metamorphic rocks formed under pressures of 3000-7000 bars and temperatures of 250-450°C with conditions intermediate between those that formed greenschist and amphibolite, or with characteristics intermediate. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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