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how do volcanoes formed? what are its two main processes​

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Jemkudanviz

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These active volcanoes were formed by the subduction of oceanic plates under continental plates. In a subduction zone, an oceanic plate submerges into the mantle under a continental plate. The friction created by the plates' movement creates magma. When this magma reaches the earth's surface, a volcano is formed.

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TiffanyXenon07viz

Answer:

Volcanoes develop when an oceanic plate descends beneath another oceanic plate or an oceanic plate descends beneath a continental plate. Subduction is the name for this method, which results in different types of volcanoes depending on the environment: Subduction between the oceans (island arc).

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