Magnetostratigraphy

Magnetostratigraphy is a geological dating method that uses Earth's magnetic field recorded in rock layers to establish their age and correlate them across different locations. As molten rock cools, iron particles within it align with the Earth's magnetic field, capturing a "snapshot" of its direction at that time. By studying these magnetic signatures, scientists can create a timeline of geological events and match rock layers from various sites, helping to decipher Earth's history and track changes in the planet's magnetic field over millions of years. It is a valuable tool in paleomagnetism and stratigraphy.