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Volcanoes occur when one plate descends, or subducts, under another plate.

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Subduction allows water from the subducting plate to be driven upward, off the subducting plate and into the mantle wedge.

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This lowers the melting point of the mantle, and it melts to form magma.

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Magma (Characteristics, Types, Sources, and Evolution)

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This magma will rise and leak into the crust forming a volcano. This process can create a chain of volcanic islands.

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Examples of island arcs are the Japanese islands and the Aleutian islands of Alaska.

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How is a VOLCANO FORMED? 🌋 (Formation and Volcanic Eruption)

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What do you feel after knowing the process?

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What do you feel after knowing the process?

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Comment here!