Sea-Floor Spreading

5 terms by pengslya

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mid-ocean ridge

an undersea mountain chain where new ocean floor is produced; a divergent plate boundary

sonar

a device that determines the distance of an object under water by recording echoes of sound waves

sea-floor spreading

the process by which molten material adds new oceanic crust to the ocean floor

deep-ocean trench

A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.

subduction

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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