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15 Cards in this Set
- Front
- Back
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formation... stage 1
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Magma rises up the cracks in the crust to just below the surface of the earth
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formation... stage 2
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a bulge forms from pressure of the magma
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how wide is the bulge?
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several kilometres wide
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formation... stage 3
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bulge eventually cracks and vents from for lava to escape
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formation... stage 4
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earthquake and plumes of ash and lava erupt into the atmosphere
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formation... stage 5
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magma basin empties and unsupported bulge collapses in
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formation... stage 6
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eruption finishes and left with a caldera
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what can these calderas become and give an example
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a lake, like lake toba
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name 3 characteristics of a volcano
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flat, cover a large area, have a caldera
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what/when was the last eruption?
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Lake Toba 74000 years ago
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compare how much ash, rock and lava a supervolcano will produce compared to a normal one
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1000s of cubic kilometres vs. a couple of cubic kilometres
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everything within ______ will be completely destroyed (killing, burning, burying) by....
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10 miles
by pyroclastic flows |
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how far will ash travel into the air?
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kilometers
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what will this cause?
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light to be blocked out for days - mini ice age
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compare how much area would be covered in ash from a super volcano and a normal volcano
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100s of square kilometres
couple of square kilometres |
