Volcanism is the eruption of molten rock, ash and gas onto the Earth's surface through vents where buoyant, gas-charged magma forces its way up from depth. Most of the roughly 1,350 potentially active volcanoes worldwide are concentrated along tectonic plate boundaries, especially the Pacific Ring of Fire, and take characteristic forms ranging from steep cinder cones built by explosive eruptions to broad shield volcanoes built from fluid lava flows.
Facts
Timescale
Timescale (category) Timescale (category) Timescale (category) Timescale (category) Timescale (category) Process Type TimescaleA single eruption can last days, months or years, while the growth of a volcanic edifice itself unfolds over thousands to millions of years. 1 Volcanism
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Source United States Geological Survey
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Demonstrated By
An active continental rift zone with ongoing volcanic activity along its length.
Source United States Geological Survey
Shaped
Source Cinder cone (Wikipedia)
Cotopaxi is an active stratovolcano.
Source Cotopaxi (Wikipedia)
Source Fumarole (Wikipedia)
Source Geyser (Wikipedia)
The Giant's Causeway is the result of an ancient volcanic fissure eruption, part of the North Atlantic Igneous Province.
Source Giant's Causeway (Wikipedia)
Kamchatka contains the volcanoes of Kamchatka, part of the Ring of Fire.
Source Kamchatka Peninsula (Wikipedia)
Source Lake Van (Wikipedia)
Source Volcanic plateau (Wikipedia)
Source Macaronesia (Wikipedia)
Source Mauna Kea (Wikipedia)
Source Mesoamerica (Wikipedia)
Source Mount Elbrus (Wikipedia)
Source Mount Fuji (Wikipedia)
Source Kilimanjaro (Volcano World, Oregon State University)
Source Ojos del Salado (Wikipedia)
Source Pico de Orizaba (Wikipedia)
Source Plateau (Wikipedia)
Source Seamount (Wikipedia)
Source Stratovolcano (Wikipedia)
A volcanic arc built by subduction-driven volcanism along the Pacific margin of South America.
Source United States Geological Survey
Source Deccan Plateau (Wikipedia)
Source Pacific Northwest (Wikipedia)
Source Volcanic crater (Wikipedia)
Source Volcano - Wikipedia
Sources
1. United States Geological Survey
United States Geological SurveyPlate tectonics and people, This Dynamic Earth
As with earthquakes, volcanic activity is linked to plate-tectonic processes.
- Shaped: The Andes
- Demonstrated By: The Great Rift Valley
View the Source Volcanism (Wikipedia)
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Volcanism, vulcanism, volcanicity, or volcanic activity
View the Source Kilimanjaro (Volcano World, Oregon State University)
Oregon State University, Volcano WorldShaped: Mount Kilimanjaro, Kilimanjaro pageQuote, Shaped: Mount Kilimanjaro, Kilimanjaro page
Kilimanjaro is a giant stratovolcano reaching an elevation of 19,335.6 ft. (5,895 m).
View the Source Cotopaxi (Wikipedia)
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Cotopaxi is an active stratovolcano in the Andes Mountains.
View the Source Giant's Causeway (Wikipedia)
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the result of an ancient volcanic fissure eruption, part of the North Atlantic Igneous Province.
View the Source Kamchatka Peninsula (Wikipedia)
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The Kamchatka Peninsula contains the volcanoes of Kamchatka, a UNESCO World Heritage Site, that form part of the Ring of Fire.
View the Source Mesoamerica (Wikipedia)
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There are 83 inactive and active volcanoes within the Sierra Madre range, including 11 in Mexico, 37 in Guatemala, 23 in El Salvador, 25 in Nicaragua, and 3 in northwestern Costa Rica.
View the Source Pacific Northwest (Wikipedia)
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Active volcanoes in the region include Mount Garibaldi, Mount Baker, Mount Rainier, Mount St. Helens, Mount Adams, Mount Hood, Mount Meager, Mount Jefferson, Mount Shasta, Lassen Peak and Glacier Peak.
View the Source Volcanic plateau (Wikipedia)
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A volcanic plateau is a plateau produced by volcanic activity.
View the Source Volcanic crater (Wikipedia)
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A volcanic crater is an approximately circular depression in the ground caused by volcanic activity.
View the Source Lake Van (Wikipedia)
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A volcanic eruption blocked its original outlet in prehistoric times.
View the Source Macaronesia (Wikipedia)
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Macaronesia (Portuguese: Macaronésia; Spanish: Macaronesia) is a collection of four volcanic archipelagos in the North Atlantic Ocean, off the coast of North Africa and Europe.
View the Source Cinder cone (Wikipedia)
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A cinder cone or scoria cone is a steep, conical landform of loose pyroclastic fragments, such as volcanic ash, clinkers, or scoria, that has been built around a volcanic vent.
View the Source Stratovolcano (Wikipedia)
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A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers (strata) of hardened lava and tephra.
View the Source Plateau (Wikipedia)
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Plateaus can be formed by a number of processes, including upwelling of volcanic magma, extrusion of lava, and erosion by water and glaciers.
View the Source Mount Elbrus (Wikipedia)
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It is a dormant stratovolcano rising 5,642 m (18,510 ft) above sea level, and is the highest volcano in Eurasia, as well as the tenth-most prominent peak in the world.
View the Source Seamount (Wikipedia)
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Seamounts are typically formed from extinct volcanoes that rise abruptly and are usually found rising from the seafloor to 100-4,000 m (330-13,120 ft) in height.
View the Source Guyot (Wikipedia)
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In marine geology, a guyot (), also called a tablemount, is an isolated underwater volcanic mountain (seamount) with a flat top more than 200 m (660 ft) below the surface of the sea.
View the Source Mount Fuji (Wikipedia)
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It is the highest mountain in Japan, the second-highest volcano on any Asian island (after Mount Kerinci on the Indonesian island of Sumatra), and the seventh-highest peak of an island on Earth.
View the Source Mauna Kea (Wikipedia)
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Mauna Kea (, Hawaiian: [ˈmɐwnə ˈkɛjə]; abbreviation for Mauna a Wākea, 'White Mountain') is a dormant shield volcano on the island of Hawaiʻi.
View the Source Deccan Plateau (Wikipedia)
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The Deccan Traps in the northwest were formed by multiple layers of igneous rock deposited by basaltic lava flows following a massive volcanic eruption occurred at the end of the Cretaceous period (66 mya).
View the Source Pico de Orizaba (Wikipedia)
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Citlaltépetl (from Náhuatl citlal(in) = star, and tepētl = mountain), otherwise known as Pico de Orizaba, is an active volcano and the highest volcano in North America, as well as the highest mountain in Mexico and third highest peak in North America, after Denali of the United States and Mount Logan of Canada.
View the Source Ojos del Salado (Wikipedia)
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Nevado Ojos del Salado (Spanish pronunciation: [ˈoxos ðel saˈlaðo] ) is a dormant complex volcano in the Andes on the Argentina-Chile border.
View the Source Geyser (Wikipedia)
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Generally, geyser field sites are located near active volcanic areas, and the geyser effect is due to the proximity of magma.
View the Source Atoll (Wikipedia)
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According to Charles Darwin's subsidence model, the formation of an atoll is explained by the sinking of a volcanic island around which a coral fringing reef has formed.
View the Source Volcano - Wikipedia
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A volcano is a vent or fissure in the crust of a planetary-mass object that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
View the Source Fumarole (Wikipedia)
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A fumarole (; also spelled fumerole) is a vent through the surface of Earth or another terrestrial planet from which hot volcanic gases and vapors are emitted, without any accompanying liquids or solids.
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