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Thursday, May 31, 2012

Supervolcanoes




The supervolcanoes eruption is estimated to have happened about 760,000 years ago, and would have covered half of North America in its ash.


Such super-eruptions can release thousands of cubic kilometres of debris - hundreds of times larger than any eruption seen in the history of humanity.


Study suggests that when these exceptionally large magma pools form they are ephemeral and cannot exist very long without erupting.