Paleomagnetism is the study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials.
Magnetic Field: The area around a magnet where its force affects other objects.
Plate Tectonics: The theory that explains how large pieces of the Earth's outermost layer, called tectonic plates, move and change shape.
Geomagnetism: The science that deals with earth's magnetic fields.