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granulite facies |
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granulite faciesOne of the major divisions of the mineral facies classification of metamorphic rocks, encompassing rocks that formed under intense temperature-pressure conditions (higher than 950°F, or 500°C). The minerals found in the rocks of granulite facies include hornblende, pyroxene, biotite, garnet, calcium plagioclase, and quartz or olivine. See also amphibolite facies. granulite facies [′gran·yə‚līt ′fā·shēz] (petrology) A group of gneissic rocks characterized by a granoblastic fabric and formed by regional dynamothermal metamorphism at temperatures above 650°C and pressures of 3000-12,000 bars. 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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The supracrustal rocks are generally metamorphosed to amphibolite facies, less commonly to granulite facies, and rarely to greenschist facies. The 2004 summer program consisted of helicopter supported prospecting and stream sediment reconnaissance over thirty-four priority satellite generated spectral targets within granulite facies metamorphic terrain, east of Nettling Lake, Baffin island. nbsp;and a few sentences later is expected to know about granulite facies. |
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