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Volcanoes take many years to form, but it also depends on the type of volcano. A stratovulcano for example exists of multiple layers. This takes many years. Because of an erruption a volcano often collapses or shrinks, so then it takes many years again. A new volcano can also be formed in the crater of an old volcano. Check the link under the related links section for detailed information about volcanoes.

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12y ago

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