Peridotite

A peridotite is a dense, coarse-grained igneous rock, consisting mostly of the minerals olivine and pyroxene. Peridotite is ultramafic, as the rock contains less than 45% silica. It is high in magnesium, reflecting the high proportions of magnesium-rich olivine, with appreciable iron. Peridotite is derived from the Earth`s mantle, either as solid....
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peridotite

An igneous rock composed primarily of the iron-magnesium silicate olivine and having a silica content of less than 40%.
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Peridotite

• (n.) An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine.
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peridotite

noun a dark coarse-grained igneous rock consisting principally of olivine
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Peridotite

Per'i·do·tite noun [ Confer French péridotite .] (Min.) An eruptive rock characterized by the presence of chrysolite (peridot). It also usually contains pyroxene, enstatite, chromite, etc. It is often altered to serpentine. » The chief diamond deposits in South Africa occur in a mo...
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peridotite

A coarse-grained mafic igneous rock composed mainly of olivine and pyroxene. Peridotite is the dominant rock of the upper part of the Earth's mantle.
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peridotite

A coarse-grained mafic igneous rock composed of olivine with accessory amounts of pyroxene and amphibole but little or no feldspar.
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peridotite

a coarse-grained, dark-coloured, heavy, intrusive igneous rock that contains at least 10 percent olivine, other iron- and magnesia-rich minerals ... [5 related articles]
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peridotite

A dark, course-grained igneous rock composed mainly of olivine with some pyroxene and hornblende but little feldspar; it alters to serpentine. Some varieties of peridotite bear chromium ore, platinum, or diamonds.
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Peridotite

A dark-colored igneous rock of coarse-grained texture, composed of olivine, pyroxene, and some other ferromagnesian minerals, but with essentially no feldspar and no quartz.
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Peridotite

A dark-colored, coarse-grained igneous rock that is made up mainly of olivine and pyroxene, with ver
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Peridotite

A dense, ultramafic and ultrabasic, coarse-grained igneous rock, consisting mostly of magnesium-rich olivine, pyroxene, and iron.
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Peridotite

A general term for intrusive ultramafic igneous rocks dominantly consisting of olivine and lacking feldspar.
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Peridotite

An intrusive igneous rock consisting mainly of olivine.
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Peridotite

Coarse grained ultramafic igneous rock composed mainly of olivine and pyroxene. The mantle is though to be composed primarily of this rock type.
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peridotite

peridotite (per"ēdō'tīt) : see olivine.
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Peridotite

Peridotite is an intrusive igneous rock thought to be one of the major components of the Earth's mantle. Peridotite is generally dark coloured and formed from dense, heavy minerals, of which more than 40 percent are olivine.
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peridotite

Rock consisting largely of the mineral olivine; pyroxene and other minerals may also be present. Peridotite is an ultramafic rock containing less than 45% silica by weight. It is believed to be one of the rock types making up the Earth's upper mantle, and is sometimes brought from the depths to the surface by major movements, or as incl...
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peridotite

[n] - a dark coarse-grained igneous rock consisting principally of olivine
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