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Dome

A steep-sided mass of viscous (doughy) lava extruded from a volcanic vent, often circular in plan view and spiny, rounded, or flat on top. Its surface is often rough and blocky as a result of fragmentation of the cooler, outer crust during growth of the dome. Domes are formed by andesite, dacite, and rhyolite lavas.

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  • Part of Speech: noun
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  • Industry/Domain: Earth science
  • Category: Geology
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