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oceanic crust |
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oceanic crust [‚ō·shē′an·ik ′krəst] (geology) A thick mass of igneous rock which lies under the ocean floor. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Arc magmatism is the end result of subduction of oceanic lithosphere caused by the sinking of a dense oceanic plate beneath an adjacent, less dense overriding plate (Fig. Although the detailed mechanisms are still a matter of debate, in general terms, subduction of oceanic lithosphere is caused by the sinking of a dense oceanic plate beneath an adjacent, less dense plate (Figs. Oceanic islands tend to occur at the young ends of hotspot trails because they record the passage of oceanic plates over rising convection cells (plumes) in the mantle, of the propagation of cracks in the lithosphere. |
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