volcanoA volcano is a place on the Earth's surface (or any other planet's or moon's surface) where molten rock, gases and pyroclastic debris erupt through the earth's crust. Volcanoes vary quite a bit in their structure - some are cracks in the earth's crust where lava erupts, and some are domes, shields, or mountain-like structures with a crater at the summit. Some types of volcanoes include: caldera, cinder cone, hornito, lava dome, maar, mud volcano, shield volcano, spatter cone, and stratovolcano. The word volcano is from Latin; it comes from the ancient Romans god of fire and metalworking, Vulcan.
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