MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY MIKKEL JUUL JENSEN / SCIENCE PHOTO LIBRARY
Earth's volcanoes. Map of the Earth showing the location of volcanoes (orange). Volcanoes form where a tectonic plate is being destroyed under another one (seen around the Pacific Ocean) as the molten rock rises to the surface. Volcanoes can also form at isolated hotspots, such as Hawaii (centre left).
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