Supervolcanoes
- Created by: Christanina
- Created on: 17-04-17 16:43
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- Supervolcanoes
- What is a supervolcano?
- Massive Volcanoes
- Are much bigger than standard volcanoes
- devlop at hotspots or destructive margins
- Yellowstone National Park has a supervolcano
- Formation
- Magma rises up through cracks in the crust
- This forms a large magma basin
- The pressure of the magma causes a bulge which is several kilometres wide
- The bulge eventually cracks
- This creates vents for lava to escape through
- The lava escapes through the vents
- This causes Earthquakes
- It then sends up gigantic plumes of ash and rock
- As the mama at the basin empties
- The bulge is no longer supported and collapses
- This spews out more lava
- Eruption finishes
- There is a big crater
- This crater is called a caldera
- Sometimes the caldera is filled with water to make a lake
- Magma rises up through cracks in the crust
- Characteristics
- Flat
- Cover a large area
- Have a caldera instead of a crater
- Effects of an eruption
- Thousands of cubic kilometres of rock will be trhown
- A thick cloud of gas will kill anything it touches
- Ash will shoot kilometres into the air and block out almost all of daylight over continents
- Mini Ice Age will take place
- Everything within 10s of km will be destroyed
- Ash will settle on hundreds of square kilometres.
- What is a supervolcano?
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