If we imagine the Earth’s history as a massive video file—let's call it the —scientists act as the video editors. By studying these magnetic "time stamps" in rocks, they can:
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.
Watch as landmasses move across the globe over eons.
This is the "original file," recorded when a rock first cools from lava or settles as sediment.
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