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eclogite |
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eclogiteAny member of metamorphic rocks whose original composition is similar to that of basalt. Eclogites consist primarily of green pyroxene (omphacite) and red garnet (pyrope), with small amounts of various other minerals such as kyanite and rutile. These minerals in the eclogite are the result of reactions in originally igneous minerals having been subjected to extremely high pressures and moderate to relatively high temperatures. eclogite [′ek·lə‚jīt] (petrology) A class of metamorphic rocks distinguished by their composition, consisting essentially of omphacite and pyrope with small amounts of diopside, enstatite, olivine, kyanite, rutile, and rarely, diamond. 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 volume of stratigraphic units (Makapuu stage of Koolau, Hawaii) ascribed to eclogite melting suggests the presence of [10. Anderson at the California Institute of Technology in Pasadena contends the transition zone holds both olivine and a high concentration of eclogite -- a rock made of garnet and clinopyroxene. Davies, 1992) of subcreted mafic and ultramafic material after its partial transformation into dense, refractory eclogite. |
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