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Bookmark or Share- Volcanism - WikipediaVolcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface astronomical body, for example planets, moons, asteroids and comets. It is caused by the presence of a heat source inside the body.
- Volcano facts and information - National GeographicJanuary 15, 2018. • 7 min read. 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....
- Forces of Nature - National Geographic SocietyForces of Nature. What is a volcano? A volcano is an opening in the Earth's surface through which lava, volcanic ash, and gases escape. Ancient people believed that volcanoes were under the control of the gods. In fact, the word volcano comes from Vulcan, the Roman god of fire.
- Volcano | Definition, Types, & Facts | Britannicavolcano, vent in the crust of Earth or another planet or satellite, from which issue eruptions of molten rock, hot rock fragments, and hot gases. A volcanic eruption is an awesome display of Earth’s power. Yet, while eruptions are spectacular to watch, they can cause disastrous loss of life and property, especially in densely populated ...
- About Volcanoes | U.S. Geological Survey - USGS.govEducation. About Volcanoes. By Volcano Hazards Program. Volcanoes are openings, or vents where lava, tephra (small rocks), and steam erupt onto the Earth's surface. Volcanic eruptions can last days, months, or even years. What is a volcano? Redoubt volcano with minor ash eruption.
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