The time required for a typical atom in the oceanic plate to complete the plate tectonic cycle is about in excess of two hundred fifty million years in which this is required for it to developed and to be fully complete for it to fully finish the plate tectonic cycle.
The answer is external stimulus
Continental drift is destroying the Earth's crust. Because the continents are slowly moving the earth's crust is stating to crack or create volcano's.
When a human dies, his corpses gets decomposed by decomposing bacteria. What's produced by the decomposing bacteria is the "fertilizer" for plants.
