This is the movement of lithospheric plates on the Earth's mantle, and the formation of new crust at divergent boundaries (e.g., Mid-Atlantic Ridge) and subduction zones at convergent boundaries (e.g., Pacific Ring of Fire).
This is the movement of lithospheric plates on the Earth's mantle, and the formation of new crust at divergent boundaries (e.g., Mid-Atlantic Ridge) and subduction zones at convergent boundaries (e.g., Pacific Ring of Fire).