Earthquake Glossary - oceanic spreading ridge

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  • oceanic spreading ridge

    An oceanic spreading ridge is the fracture zone along the ocean bottom where molten mantle material comes to the surface, thus creating new crust. This fracture can be seen beneath the ocean as a line of ridges that form as molten rock reaches the ocean bottom and solidifies.


    oceanic spreading ridge

    (Image from "This Dynamic Earth: The Story of Plate Tectonics")