Discover times when the North and South poles actually swapped places.
This is the "original file," recorded when a rock first cools from lava or settles as sediment. Nrmgzmp4
Natural Remanent Magnetization is the permanent magnetism locked into rocks when they first form. Just like an MP4 file captures light and sound, NRM captures the at a specific moment in geological history. Discover times when the North and South poles