11. A large continental block existed with oceanic crust subducting underneath it. 12. Beneath the wedge are several seismic layers within the oceanic crust . 13. They also found that the oceanic crust was much thinner than continental crust. 14. Ocean island basalts are found on islands and volcanoes located on oceanic crust . 15. Through subduction, oceanic crust and lithosphere returns to the convecting mantle. 16. The oceanic crust is moving away from the Explorer Ridge to either side. 17. The intrusions were formed when upwelling asthenosphere partially melted thick overlying oceanic crust . 18. As the oceanic crust dives into trenches, the continental crust collects above them. 19. The circulation of hydrothermal fluids through young oceanic crust causes chlorite, and serpentine, respectively. 20. The oceanic crust is moving away from the East Pacific Rise to either side.
