11. The lithosphere is subdivided into soil forming process is called the pedosphere. 12. The mantle part of the lithosphere consists largely of peridotite. 13. Similarly, Earth's lithosphere " floats " in the asthenosphere. 14. Weathering processes initiated by organisms can also free oxygen from the lithosphere . 15. The temperature underneath the orogen is much higher and weakens the lithosphere . 16. Negative buoyancy of the lower continental crust and mantle lithosphere drive delamination. 17. The space left behind by departing lithosphere is filled by upwelling asthenosphere. 18. Through subduction, oceanic crust and lithosphere returns to the convecting mantle. 19. Accretionary prism between the subducting oceanic lithosphere and the overriding continental plate. 20. Simultaneously, normal faulting throughout the protogulf further weakened the areal lithosphere .