In the given figure, location A is an oceanic-oceanic divergent plate boundary, where two oceanic plates are moving in the opposite direction. This plate motion takes place due to the occurrence of convection current in the mantle. This results in the formation of a mid-oceanic ridge where the magma comes out to the bottom of the seafloor and eventually adds new materials to the crust. This type of plate boundary is associated with deep-focus earthquakes.
For example, The opposite movement of the North American plate and Eurasian plate resulted in the formation of the Mid-Atlantic Ridge.
