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quartz monzonite
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quartz monzonite

mineral
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Also known as: adamellite, quartz latite, rhyodacite
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Also called:
adamellite

quartz monzonite, intrusive igneous rock (solidified from a liquid state) that contains plagioclase feldspar, orthoclase feldspar, and quartz. It is abundant in the large batholiths (great masses of igneous rocks mostly deep below the surface) of the world’s mountain belts. Quartz monzonite differs from granodiorite by containing more alkali feldspar, usually more biotite and less hornblende, and oligoclase instead of andesine as the plagioclase mineral.