| oceanic lithosphere | 1.97 | The largest examples are to be found on oceanic lithosphere marking the site of hot spots. | ||
| oceanic crust | 1.84 | As the oceanic crust dives into trenches, the continental crust collects above them. | ||
| oceanic trench | 0.46 | The second category is closely related to oceanic trenches and their associated island arcs or mountain belts. | ||
| oceanic island | 0.39 | Many oceanic islands are volcanic. | ||
| oceanic plate | 0.26 | Some of the sea-floor sediments, muds, and oozes sitting on top of the oceanic plate also get melted. |