Terminology And Types:
Why are volcanoes called "active" even when there is no eruption?
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Volcanoes are referred to as active because it applies to whether or not the volcano has erupted in the past 10,000 years.
What is a subduction volcano?
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Subduction is the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate. A volcano using this subduction process occurs where two plates push together. These plates contain both oceanic and continental crust . Lithosphere descends beneath the plate next to it. This consumes the oceanic lithosphere into the earth's mantle.
What is an island chain volcano?
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An island chain volcano is a curved chain of volcanic islands by a deep oceanic trench. Island arcs form in the tectonic plates of subduction zones as the result of rising melt from the plate going down. An island arc is a kind of volcanic arc.