Supervolcanoes

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What are super volcanoes?
Massive volcanoes
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Where do they develop?
Destructive margins or over parts of the mantle that are really hot (hotspots)
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For example?
Yellowstone National Park in the USA
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How do super volcanoes form-Magma rises up through cracks in the crust to form a large ____ ____ below the surface. The pressure of the magma causes ____ ____ on the surface several km wide.
Magma basin , circular bulge
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How do super volcanoes form-The bulge eventually cracks , creating ___ for lava to escape through. the lava erupts out of the vents cause ___ and sending up gigantic plumes of ___ and ___
vent , earthquakes , ash and lava
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How do super volcanoes form- As the magma basin empties, the bulge is no longer supported so it _____
collapses - spewing up more lava
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How do super volcanoes form-When the eruptions finished theres a big crater (___) left where the bulge collapses. Sometimes these get filled with water to form a large ____ (for example)
caldera , lake , Lake Toba in Indonesia
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What are the 3 characteristics of a super volcano?
Flat , cover a large area , have a caldera
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Fortunately, there are only a few super volcanoes and an eruption hasn't happened for long. When did Lake Toba erupt?
74000 years ago
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What are the two global consequences?
1)A super volcanic eruption will throw out thousands of cubic km of rock, ash, and lava 2) A thick cloud of super heated gas and ash will flow at high speed from the volcano, killing, burning and burying everything it touches.Destroy everything 10m
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What are the two global consequences?
3)Ash will shoot km into the air and block out almost all daylight over whole continents.This can trigger mini ice ages as less heat energy from the sun gets to Earth.4)The ash will also settle over hundreds of square km burying fields and biuildings
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Other cards in this set

Card 2

Front

Where do they develop?

Back

Destructive margins or over parts of the mantle that are really hot (hotspots)

Card 3

Front

For example?

Back

Preview of the front of card 3

Card 4

Front

How do super volcanoes form-Magma rises up through cracks in the crust to form a large ____ ____ below the surface. The pressure of the magma causes ____ ____ on the surface several km wide.

Back

Preview of the front of card 4

Card 5

Front

How do super volcanoes form-The bulge eventually cracks , creating ___ for lava to escape through. the lava erupts out of the vents cause ___ and sending up gigantic plumes of ___ and ___

Back

Preview of the front of card 5
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