Along mid-ocean ridges C. The sea floor is spreading from the ocean ridges where new ocean crust is created and spreads outward. Science Nature Sea Floor Records Ancient Earth Subduction Zone Science Science Nature Plates move together separate and slide past each other creating regions of volcanic activity mountain building and earthquakes. . At the edges of continental shelves. Seafloor spreading is a geologic process where there is a gradual addition of new oceanic crust in the ocean floor through a volcanic activity while moving the older rocks away from the mid-oceanic ridge. The motivating force for seafloor spreading ridges is tectonic plate slab pull at subduction zones rather than magma pressure although there is typically significant magma activity at spreading ridges. Zakyiaiarvis8042 is waiting for your help. As magma starts to harden into rock iron-rich minerals solidify first. The release of molten rock throu...
