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G. Several phenocrysts of magnetite are shown in this photomicrograph. Two of these abut against a phenocryst of pyroxene. The lower one of these is euhedral in shape; all other magnetite phenocrysts in the photo are subhedral or anhedral. The mineral assemblage is magmatic. The field of view is about 1.3 x 2 mm. Reflected light. DDH 458-151.8.
