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Why does deep ocean trench occur?

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Anonymous

9y ago
Updated: 3/16/2022

At deep-ocean trenches, subduction allows part of the ocean floor to sink back into the mantle. The ocean floor does not just keep spreading. Instead, it sinks beneath deep underwater canyons called deep-ocean trenches. Where there are trenches, subduction takes place.

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Ardella Ernser

Lvl 13
3y ago

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Is a valley under the ocean a deep ocean trench?

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