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A dark coarse-grained igneous rock consisting principally of olivine
Answer for the clue "A dark coarse-grained igneous rock consisting principally of olivine ", 10 letters:
peridotite
Alternative clues for the word peridotite
Word definitions for peridotite in dictionaries
WordNet
Word definitions in WordNet
n. a dark coarse-grained igneous rock consisting principally of olivine
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Peridotite \Per"i*do*tite\, n. [Cf. F. p['e]ridotite.] (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. Note: The chief diamond ...
Wiktionary
Word definitions in Wiktionary
n. (context geology English) A rock consisting of small crystals of olivine, pyroxene and hornblende; the major constituent of the Earth's mantle.
Wikipedia
Word definitions in Wikipedia
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 ...
Usage examples of peridotite.
Like enstatite, bronzite is a constituent of many basic igneous rocks, such as norites, gabbros, and especially peridotites, and of the serpentines which have been derived from them.
We know that to a depth of about a hundred miles the mantle consists predominantly of a type of rock known as peridotite, but what fills the space beyond is uncertain.
After three days the side effects of some of the component minerals, primarily peridotite and olivine, cause violent mental aberrations and hallucinations.
Back of the gold-bearing quartz lies an enormous deposit of altered peridotite, which contains diamonds, in the search for which it evidently became necessary to extend one of the shafts to the opposite side of the mountain, possibly for purposes of ventilation.
They consisted of a mixture of iron, nickel, peridotite, magnesium, and silicates.
One of them was a small block of peridotite, polished smooth before a single diagonal was cut across its coarse crystals.