bowens reaction . labeled petrology work explanation.

amphibole andesite basalt basaltic biotite bowens calcium composition continuous crystallization diagram diorite earth educational eruption example explanation feldspar felsic formation gabbro geology granite illustration infographic intermediate komatite labeled lava mafic magma mica muscovite olivine peridotite petrology plagioclase potassium pyroxene quartz reaction rhyolite rich rocks scheme science sodium structure temperature vector