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shusha [124]
2 years ago
5

Peridotite, which is composed almost entirely of dark silicate minerals and is believed to make up much of Earth’s upper mantle,

has a composition that is _____.
granitic

ultramafic

andesitic

basaltic

Description
Biology
2 answers:
julia-pushkina [17]2 years ago
7 0

ultramafic is the answer

Scrat [10]2 years ago
7 0

The right option is; ultramafic

Peridotite is a dense, coarse-grained plutonic rock that is composed mostly of the minerals olivine and pyroxene. The composition of peridotite is ultramafic, as the rock has less than 45% silica and it has high magnesium content with significant amount of iron. Peridotite is economically valuable because it is a source rock for diamonds, and it is the major constituent of the upper part of the Earth's mantle.

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