any steep-sided mound that is formed when lava reaching the Earth`s surface is so viscous that it cannot flow away readily and accumulates around ... [2 related articles]
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Volcanic dome atop Novarupta vent, Valley of Ten Thousand Smokes, Katmai National Park and Preserve, Alaska. The dome was erupted from the same vent that expelled about 15 km
3 of magma in an enormous explosive eruption in 1912. Credit: U.S. Geological Survey A rounded, st...
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A bulb-shaped solid that forms over a vent when lava so viscous that it cannot flow out of the volcanic crater cools and hardens. When a volcanic dome forms, it traps the volcano's gases beneath it. They either escape along a side vent of the volcano or build pressure that causes another eruption and shatters the volcanic dome.
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A steep-sided extrusion of very viscous lava that is squeezed from a volcanic vent without major eru
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A rounded accumulation around a volcanic vent of congealed lava too viscous to flow away quickly; hence usually rhyolite lava.
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volcanic dome A steep-sided, rounded mass of viscous lava forming a dome-shaped or bulbous mass over a volcanic vent.
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