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volcanoes

science ch. 3

QuestionAnswer
aa cool, slow-moving type of lava
magma molten mixture of rock-forming substances
crater bowl shaped area that forms around a volcano's central vent
silica material found in magma that is formed from oxygen and silicon
pahoehoe hot, fast moving type of lava
geyser type of hot spring that erupts as a fountain of water and stream
volcano weal spot in the earths crust where magma has come to the surface
lava magma that reaches the surface
active erupting or showing signs of erupting in the near future
caldera large hole formed when volcano's magma chamber empties and collapses
extinct unlikely to erupt again
batholith mass of rock formed when magma cooled inside the crust
dike slab that forms when magma forces itself across rock layers
sill slab that forms when magma squeezes between layers of rock
lava plateau lave layers formed by highly fluid basialtic lava numerious during successive erutions
volcanoic neck a deposit of harded magma in a volcano's pipe
geothermal activity the heating of underground water by magma
shield volcano a type of volcano usually built almost entirely of fluid lava flow gently sloping
cinder cone volcano a steep conical hill of tephra that accumulates around and downwind from a volcanic vent.
composite volcano constructed from multipe eruptions sometimes recurring over hundreds of thousands of years, sometimes over a few hundred
Created by: laurenh2017
 

 



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