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Volcano - Wikipedia A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface [1]
About Volcanoes | U. S. Geological Survey - USGS. gov Molten rock below the surface of the Earth that rises in volcanic vents is known as magma, but after it erupts from a volcano it is called lava Magma is made of molten rock, crystals, and dissolved gas—imagine an unopened bottle of soda with grains of sand inside
Volcano | Definition, Types, Facts | Britannica Volcano, vent in the crust of Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases The term volcano can also refer to the landform created by the accumulation of solidified lava and volcanic debris near the vent
Volcano facts and types of volcanoes | Live Science From lava fountains to towering ash clouds, volcanoes produce some of the most dramatic geological events on the planet Volcanoes are cracks in Earth's crust that allow molten rock and hot
Volcano facts and information | National Geographic Volcanoes are Earth’s geologic architects They’ve created more than 80 percent of our planet’s surface, laying the foundation that has allowed life to thrive Their explosive force crafts
Volcanoes - National Geographic Society A volcano is an opening in a planet or moon’s crust through which molten rock, hot gases, and other materials erupt Volcanoes often form a hill or mountain as layers of rock and ash build up from repeated eruptions
Volcanoes, Craters Lava Flows (U. S. National Park Service) It’s hard not to be awed by an active volcano Molten rock—magma—making its way to the surface gives us a glimpse of the powerful forces that made Earth and continue to shape it today
How Volcanoes Work - HowStuffWorks Volcanoes are some of nature's most awe-inspiring displays, with everything from exploding mountaintops to rivers of lava Learn how all the different types of volcanoes work See more volcano pictures