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A large cauldron-like volcanic feature, formed when a chamber full of magma empties and the ground above it collapses.
A large cauldron-like volcanic feature, formed when a chamber full of magma empties and the ground above it collapses. Caldera can be tens or hundreds of kilometres across, and sometimes form after explosive eruptions, such as that of Toba, 75,000 years ago.
Caldera can be tens or hundreds of kilometres across, and sometimes form after explosive eruptions, such as that of Toba, 75,000 years ago.