Geologic cross-section showing the Pacific Plate (right) subducting beneath the Philippine Plate (left) at the Mariana Trench.  This causes melting that feeds magma to the volcanoes of the Mariana arc.  Image credit: Figure modified from Hussong and Fryer, 1981.

Geologic cross-section showing the Pacific Plate (right) subducting beneath the Philippine Plate (left) at the Mariana Trench. This causes melting that feeds magma to the volcanoes of the Mariana arc. Figure modified from Hussong and Fryer, 1981.

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Related Links

Seamounts of the Mariana Arc

Submarine Ring of Fire 2014 - Ironman: Background Resources

Submarine Ring of Fire 2014 - Ironman