The flashcards below were created by user
NelsH
on FreezingBlue Flashcards.
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volcano
place on a planet where some material from the inside of the planet makes its way through the planet's surface
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magma
fluid molten rock, part solid, part liquid, part gas
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hotspot
plume shape 500-1000 km wide between plate
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magma chamber
when the upward pressure is exceeded by the downwards pressure, magma collects in magma chambers
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plinian eruption
- -high magma viscosity
- -towering, sustained plume
- -fast flowing lava
- -very disruptive
- -lots of pyroclastic material
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hawaiian eruption
- -not very destructive
- -not much pyroclastic material
- -sluggish flow of low viscosity lava
- -can be a fire fountain
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strombolian eruption
- -not very dangerous
- -high viscosity magma
- -loud sounds
- -not very much lava
- -small eruption
- -no lava flows
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fissure eruption
- -no gas pressure
- -lava breaks through a crack and flows
- -curtain of lava spewing out
- -large flow of slow moving lava
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caldera
large crater shaped basins that form when eruptions drain a magma chamber and the volcano collapses into the empty space
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active
if the volcano erupted recently (200 years ago) then it is considered active and could explode again
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dormant
if it erupted before historic times but within 10000 years ago it is considered dormant
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extinct
if a volcano has no magma supply or it has not erupted for more than 10000 years it is considered extinct
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