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| The undersea mountain chain where new ocean floor is produced; a divergent plate boundery. |
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| A system that determines the distance of an object under water by recording echoes of sound waves; gets its name from sound navigation and ranging. |
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Definition
| A system that determines the distance of an object under water by recording echoes of sound waves; gets its name from sound navigation and ranging. |
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Definition
| The process by which molten material adds new oceanic crust to the ocean floor. |
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| A deep valley along the ocean floor through which oceanic crust slowly sinks towards the mantle. |
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Definition
| The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary. |
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