A porphyritic rock (with large crystals in a fine-grained matrix) that contains augite as a prominent phenocryst mineral.
From augite combined with 'porphyre' (from Greek 'porphyra' meaning 'purple stone'). The compound term describes the textural and mineralogical characteristics of the rock—augite crystals visible in a finer groundmass.
Augitophyre shows you a story of cooling—the large augite crystals cooled slowly underground, then the rock was pushed up and cooled quickly, creating two different crystal sizes!
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