The composition of the magma determines the minerals that form in an igneous rock.

Name: The composition of the magma determines the minerals that form in an igneous rock.
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The composition of the magma determines the types of minerals that crystallize and form in an igneous rock. For example, a magma rich in silica will produce minerals like quartz and feldspar, whereas a magma rich in iron and magnesium will produce minerals like olivine and pyroxene.

The Composition of the Magma Determines the Minerals That Form