What is position of basalt rock
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The most common extrusive mafic igneous rocks are basalt and diabase (mafic) and spilite (Plagioclase-rich in albitization of basalt). Basalts are common aphanitic igneous extrusive rocks composed of minute grains of Plagioclase feldspar (Labradorite), Pyroxene, Olivine, Biotite, Hornblende, and less than 20% Quartz.
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