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geography case studies > supervolcanoe > Flashcards

supervolcanoe Flashcards

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1
Q

where is magma storeed

A

magma BASIN

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2
Q

crater at the ned called

A

caldera

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3
Q

characteristics

A

flat
very wide
have a caldera
a bulge before erupting

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4
Q

how it erupts (hotspot)

A

magma rises up through cracks in crust
magma basin formed
pressure forms bulge- several Km wide
bulge cracks- vents for lava, gas and ash erupt out
as basin empties the bulge collapses- more lava thrown up
when eruption finished- caldera formed

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5
Q

effects

A 
everything within 10 miles will be completely destroyed
nuclear winter
90% killed within 1000km
contaminated water
ash covers crops- no crops
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geography case studies (13 decks)

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