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Dacite Rock

Dacite ( / ˈ d eɪ s aɪ t / ) is an igneous , volcanic rock . It has an aphanitic to porphyritic texture and is intermediate in composition between andesite and rhyolite . The word dacite comes from Dacia , a province of the Roman Empire which lay between the Danube River and Carpathian Mountains (now modern Romania and Moldova ) where the rock was first described.

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