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Ch 18 Vocab Words

TermDefinition
volcanism describes all the processes associated with the discharge of magma, hot fluids, and gases
hot spot unusually hot regions of Earth's mantle where high-temperature plumes of magma rise to the surface
flood basalt form when lava flows out of long cracks in Earth's crust
fissure long cracks on Earth
conduit a tube like structure that allows lava to reach the surface
vent opening in Earth's crust through which lava erupts and flows out onto the surface
crater bowl-shaped depression that form around the central cent at the summit of a volcano
caldera large crater, up to 50 km in diameter, that can form when the summit or side of a volcano collapses to the magma chamber during or after eruption
shield volcano broad volcano with gently sloping sides build by nonexplosive eruptions of basaltic lava that accumulates in layers
cinder cone steep-sided, generally small volcano that is built by the accumulation of tephra around the vent
composite volcano generally cone-shaped with concave slopes; built by violent eruptions of volcanic fragments and lav that accumulate in alternating layers
Created by: selenamercado
Popular Earth Science sets

 

 



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