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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
Anatomy of a Volcano - U. S. National Park Service Volcanoes are both the vents where molten rock material and volcanic gases are erupted from within Earth’s interior, and the cones and mountains built up around those vents But beyond this simple definition, volcanoes are incredibly diverse with some types being very complex
Volcanoes - National Geographic Society A volcano is an opening in a planet or moon’s crust through which molten rock and gases trapped under the surface erupt, often forming a hill or mountain
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
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