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Physical Process

Volcanism

Also Known As Vulcanism, volcanicity, or volcanic activity
Tectonics and Volcanism

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
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Millions of Years 1
Process Type
Tectonic 1
Timescale
A 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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Caused By

Source United States Geological Survey

Causes

Demonstrated By

An active continental rift zone with ongoing volcanic activity along its length.

Source United States Geological Survey

Shaped

Atoll, Landforms
Source Atoll (Wikipedia)
Cinder Cone, Landforms
Source Cinder cone (Wikipedia)
Cotopaxi, Landforms

Cotopaxi is an active stratovolcano.

Source Cotopaxi (Wikipedia)
Fumarole, Landforms
Source Fumarole (Wikipedia)
Geyser, Landforms
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)
Guyot, Landforms
Source Guyot (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)
Macaronesia, Regions
Source Macaronesia (Wikipedia)
Mauna Kea, Landforms
Source Mauna Kea (Wikipedia)
Mesoamerica, Regions
Source Mesoamerica (Wikipedia)
Source Mount Elbrus (Wikipedia)
Mount Fuji, Landforms
Source Mount Fuji (Wikipedia)
Source Kilimanjaro (Volcano World, Oregon State University)
Source Ojos del Salado (Wikipedia)
Source Pico de Orizaba (Wikipedia)
Plateau, Landforms
Source Plateau (Wikipedia)
Seamount, Landforms
Source Seamount (Wikipedia)
Source Stratovolcano (Wikipedia)
The Andes, Landforms

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 Survey
  • Plate 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)
Wikimedia FoundationLead section, opening sentence
Quote, Lead section, opening sentence
Volcanism, vulcanism, volcanicity, or volcanic activity
View the Source
Kilimanjaro (Volcano World, Oregon State University)
Oregon State University, Volcano WorldShaped: Mount Kilimanjaro, Kilimanjaro page
Quote, Shaped: Mount Kilimanjaro, Kilimanjaro page
Kilimanjaro is a giant stratovolcano reaching an elevation of 19,335.6 ft. (5,895 m).
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Cotopaxi (Wikipedia)
Wikimedia FoundationShaped: Cotopaxi, Lead section
Quote, Shaped: Cotopaxi, Lead section
Cotopaxi is an active stratovolcano in the Andes Mountains.
View the Source
Giant's Causeway (Wikipedia)
Wikimedia FoundationShaped: Giant's Causeway, Lead section
Quote, Shaped: Giant's Causeway, Lead section
the result of an ancient volcanic fissure eruption, part of the North Atlantic Igneous Province.
View the Source
Kamchatka Peninsula (Wikipedia)
Wikimedia FoundationShaped: Kamchatka Peninsula, Lead section
Quote, Shaped: Kamchatka Peninsula, Lead section
The Kamchatka Peninsula contains the volcanoes of Kamchatka, a UNESCO World Heritage Site, that form part of the Ring of Fire.
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Mesoamerica (Wikipedia)
Wikimedia FoundationShaped: Mesoamerica, Geography section, Sierra Madre volcanoes paragraph
Quote, Shaped: Mesoamerica, Geography section, Sierra Madre volcanoes paragraph
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.
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Pacific Northwest (Wikipedia)
Wikimedia FoundationShaped: The Pacific Northwest, Geology section, list of active volcanoes
Quote, Shaped: The Pacific Northwest, Geology section, list of active volcanoes
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.
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Volcanic plateau (Wikipedia)
Shaped: Lava Plateau, Lead paragraph
Quote, Shaped: Lava Plateau, Lead paragraph
A volcanic plateau is a plateau produced by volcanic activity.
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Volcanic crater (Wikipedia)
Shaped: Volcanic Crater, Lead paragraph
Quote, Shaped: Volcanic Crater, Lead paragraph
A volcanic crater is an approximately circular depression in the ground caused by volcanic activity.
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Lake Van (Wikipedia)
Wikimedia FoundationShaped: Lake Van, Lead paragraph
Quote, Shaped: Lake Van, Lead paragraph
A volcanic eruption blocked its original outlet in prehistoric times.
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Macaronesia (Wikipedia)
Wikimedia FoundationShaped: Macaronesia, Lead paragraph
Quote, Shaped: Macaronesia, Lead paragraph
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.
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Cinder cone (Wikipedia)
Shaped: Cinder Cone, Lead
Quote, Shaped: Cinder Cone, Lead
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.
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Stratovolcano (Wikipedia)
Shaped: Stratovolcano, Lead
Quote, Shaped: Stratovolcano, Lead
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.
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Plateau (Wikipedia)
Shaped: Plateau, Lead
Quote, Shaped: Plateau, Lead
Plateaus can be formed by a number of processes, including upwelling of volcanic magma, extrusion of lava, and erosion by water and glaciers.
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Mount Elbrus (Wikipedia)
Wikimedia FoundationShaped: Mount Elbrus, Lead
Quote, Shaped: Mount Elbrus, Lead
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.
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Seamount (Wikipedia)
Shaped: Seamount, Lead
Quote, Shaped: Seamount, Lead
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.
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Guyot (Wikipedia)
Shaped: Guyot, Lead
Quote, Shaped: Guyot, Lead
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.
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Mount Fuji (Wikipedia)
Wikimedia FoundationShaped: Mount Fuji, Lead
Quote, Shaped: Mount Fuji, Lead
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.
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Mauna Kea (Wikipedia)
Wikimedia FoundationShaped: Mauna Kea, Lead
Quote, Shaped: Mauna Kea, Lead
Mauna Kea (, Hawaiian: [ˈmɐwnə ˈkɛjə]; abbreviation for Mauna a Wākea, 'White Mountain') is a dormant shield volcano on the island of Hawaiʻi.
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Deccan Plateau (Wikipedia)
Shaped: The Deccan Plateau, Lead
Quote, Shaped: The Deccan Plateau, Lead
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).
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Pico de Orizaba (Wikipedia)
Wikimedia FoundationShaped: Pico de Orizaba, Lead
Quote, Shaped: Pico de Orizaba, Lead
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.
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Ojos del Salado (Wikipedia)
Wikimedia FoundationShaped: Ojos del Salado, Lead
Quote, Shaped: Ojos del Salado, Lead
Nevado Ojos del Salado (Spanish pronunciation: [ˈoxos ðel saˈlaðo] ) is a dormant complex volcano in the Andes on the Argentina-Chile border.
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Geyser (Wikipedia)
Shaped: Geyser, Lead
Quote, Shaped: Geyser, Lead
Generally, geyser field sites are located near active volcanic areas, and the geyser effect is due to the proximity of magma.
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Atoll (Wikipedia)
Shaped: Atoll, Lead
Quote, Shaped: Atoll, Lead
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.
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Volcano - Wikipedia
Shaped: Volcanic Mountain, Lead
Quote, Shaped: Volcanic Mountain, Lead
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.
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Fumarole (Wikipedia)
Shaped: Fumarole, Lead
Quote, Shaped: Fumarole, Lead
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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