peridotite

/ˈpɛɹ.ɪ.dəˌtaɪt/

noun

(geology) A rock consisting of small crystals of olivine, pyroxene and hornblende; the major constituent of the Earth's mantle.

Peridotite is a type of igneous rock that is rich in olivine.

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意味（1）

(geology) A rock consisting of small crystals of olivine, pyroxene and hornblende; the major constituent of the Earth's mantle.

Varieties of peridotite are distinguished by their mineral composition; for example, dunite is a peridotite which is virtually all olivine, and a dense, dark green in colour.

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peridotite

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