Paleo-magnetism

Paleomagnetism is the study of Earth's ancient magnetic field preserved in rocks. When volcanic rocks or sediments form, magnetic minerals within them align with Earth's current magnetic field, effectively recording its direction and strength at that time. By examining these magnetic signatures in rocks of different ages, scientists can understand how Earth's magnetic field has changed over millions of years. This information helps reconstruct past movements of continents and the history of Earth's magnetic poles, providing insights into plate tectonics and the dynamic nature of our planet's interior.