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 …
Volcano | Definition, Types, & Facts | Britannica
Sep 29, 2025 · Strictly speaking, the term volcano means the vent from which magma and other substances erupt to the surface, but it can also refer to the landform created by the …
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.
Anatomy of a Volcano - U.S. National Park Service
Jul 5, 2023 · Volcanic edifice - A mountain or cone that is the main portion of a volcano. It results from the accumulation of lava, tephra, pyroclastic flows, lahars, and/or other volcanic deposits …
Volcanoes and Volcanic Eruptions - Facts and Information
Articles, facts, information and photos for volcanoes and volcanic activity. | Geology.com
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 and Your Safety | Volcanoes | CDC
Apr 22, 2024 · Know how to prepare for and protect yourself during and after volcanic eruptions.
When Volcanoes Erupt - Smithsonian National Museum of Natural …
Aug 1, 2025 · Learn about volcanic eruptions and the science of volcanoes. Get details on Smithsonian research into what volcanoes reveal about Earth’s interior.
Volcano facts and types of volcanoes | Live Science
Feb 25, 2025 · Volcanic "bombs" are chunks of semimolten lava that fly out of a volcano and solidify as they land. They're often flung miles from the volcanic crater.
VOLCANIC Definition & Meaning - Merriam-Webster
The meaning of VOLCANIC is of, relating to, or produced by a volcano. How to use volcanic in a sentence.