At Mid-Ocean Ridges.
antartica
New sea floor is being created at mid oceanic ridges.
Sea floor spreading causes this. As the floor spreads apart new magma is being pushed up through the ridge from the mantle through convection currents. It's like a recycling system.
the ridges
It was created on the sea floor.
Seafloor Spreading created by harry hess
Mid-oceanic ridges are created where sea floor spreading takes place. These are called divergent boundaries and mark places where new sea floor is being created. They are tectonically active regions and can be characterized by undersea vents where magma comes up and cools quickly because of its contact with very cold water.
the divergent plate boundary is the one that is sea floor created
sea-floor spreading
Seafloor Spreading created by harry hess
the magnetic pattern on the sea floor
No. While new sea floor is being made in one place, at other places it is being destroyed, the diameter of the earth therefore remains constant overall.