(noun) A lightgrayvolcanicrock containing a mixture of plagioclase and othercrystallinemineralsinglassysilica,similarinappearance to rhyolite.
(noun) an igneous, volcanic rock characteristically light in colour with relatively high silica content
Use "dacite" in a sentence
"Basalt magma typically generates very little ash compared to other types (andesite, dacite, and rhyolite)."
"For example, volcanic eruptions range from (1) effusion of lava fountains and flows with very little ash erupted, typical of basaltic magma eruptions; to (2) extremely explosive eruptions that inject large quantities of ash high into the stratosphere, typical of rhyolite and dacite magmatic eruptions."
"An intrusive complex of dacite with sedimentary and metamorphic rocks of Palaeozoic age comprise the predominant rock forms."