The June 12, 1991 eruption column from Mount Pinatubo, Philippines, as seen from Clark Air Base. credit: Richard P. Hoblitt/USGSFrom Live Science:
The eruption of a volcano on the island nation of Iceland on Saturday is a result of the tectonic processes that have continuously shaped and re-shaped the Earth's surface for billions of years. These processes are responsible for some of the biggest, deadliest eruptions in history.
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