The answer for the year of 2017 would be more than 90 million. Hope this helps.
The statement which geologists assume is true is that plates are denser than the oceanic crust.
A section of lithosphere which slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust.
Seafloor spreading is termed as the process by which molten material adds new oceanic crust to the floor of oceans. A divergent boundary is where plates move away from each other by forming rift valleys or oceanic ridges.
Surfactant
Hope this helps :)
