mid-ocean ridge mid-ocean ridgeunderwater mountain chain where new ocean crust is created. Related Articles: How is sound used to study the Earth’s history?HurricanesHydrothermal ventsHow is sound used to study undersea earthquakes?How is sound used to study underwater volcanoes?Ocean ObservatoriesAlternative Meanings: Mid-ocean ridgeunderwater mountain chain where new ocean crust is created. Chris Knowlton2017-02-26T20:10:12-05:00