Results when the shafts of the Earth flip. The iron-rich outer core creates the Earth's magnetic field. This field isn't connected. In the past, the polarity of the Earth's magnetic field has converted, many times over.
Step-by-step explanation:
This was discovered in individuals of the defenses of the seashore floor at mid-ocean elevations, where matching designs of magnetic polarity were perceived on each side of the mid-ocean backbone.