melanocratic rock
mineralogy
Quick Summary
Melanocratic refers to igneous rocks that are predominantly composed of dark-colored minerals. These dark minerals, such as pyroxene, amphibole, and olivine, are rich in magnesium and iron, giving the rock its characteristic dark hue. This is in contrast to leucocratic rocks, which are characterized by light-colored minerals. The term "melanocratic" is used to describe the mineralogical composition of igneous rocks, with a higher proportion of mafic minerals.1234
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