Volcano - Wikipedia On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater
About Volcanoes | U. S. Geological Survey - USGS. gov 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 Photograph taken during observation and gas data collection flight by AVO staff March 30, 2009
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 A volcanic eruption is an awesome display of Earth’s power
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 - Education | National Geographic Society Volcanoes often form a hill or mountain as layers of rock and ash build up from repeated eruptions Volcanoes are classified as active, dormant, or extinct Active volcanoes have a recent history of eruptions ; they are likely to erupt again
What Is a Volcano? | NASA Space Place – NASA Science for Kids Volcanoes occur when material significantly warmer than its surroundings is erupted onto the surface of a planet or moon from its interior On Earth, the erupted material can be liquid rock ("lava" when it's on the surface, "magma" when it's underground), ash, cinders, and or gas
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