Rhyolite Specimen, Rhyolite Specimen is aphanitic felsic rock, formed during eruptions of thick, viscous magma, Each

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For use in density comparison with other igneous rocksCorrelates well to Next Generation Science Standards Evidence StatementsHigh silica content makes it difficult for this rock to erupt, leading to explosive eruptions that emit ash and dust into atmosphereEvolved chemistry makes it lightweight relative to other igneous rocks, good identifier during classification exercise