deep-sea trench: Quick Facts

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Facts

Also Known As	oceanic trench

Photos

Cross-sectional diagram illustrating plate tectonics, showing oceanic and continental crust moving over the asthenosphere. It highlights divergent boundaries at oceanic ridges where crust forms, convergent boundaries at trenches with subduction zones where crust is destroyed, and a transform boundary with a fault. Features such as island arcs, rising magma, and hotspots are labeled.

Cross-sectional diagram showing three tectonic plates at ocean ridges, transform faults, and a subduction zone. The image illustrates rising magma forming rift and subduction volcanoes, convection currents in the mantle, and features such as ocean trenches, extinct and hot-spot volcanoes, and the movement of plates above a molten core and low-velocity mantle layer.

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Topics

island arc marginal trench oceanic trough Harbors and sea works iceberg ocean current coral reef oceanic ridge gulf submarine canyon bay submarine fracture zone abyssal plain

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