Vitrophyre
Vitrophyre is a volcanic rock with larger crystals (phenocrysts) embedded in a glassy groundmass.[1]
Volcanic rock is formed when molten rock (magma), which is produced by a volcano, has cooled and solidified (crystallized). Groundmass of rock is the fine-grained mass of material in which larger grains or crystals are embedded.
References
- ↑ "Vitrophyre definition from the Dictionary of Geology". Retrieved 2010-05-17..
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