Dacite igneous rock

Dacite igneous rock

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Dacite igneous rock. Dacite forms when molten volcanic lava solidifies. It consists mostly of silica (silicon dioxide) and some sodium and potassium minerals. It is fine-grained and light in colour.

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Keywords: crystal, crystals, dacite, earth science, extrusive, geological, geology, igneous, mineral, mineralogy, minerals, rock, rocks, silica, silicon dioxide, stone

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