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並前往https://www.amnh.org/learn-teach/curriculum-collections/earth-inside-and-out/zircon-chronology-dating-the-oldest-material-on-earth

Zircon Chronology: Dating the Oldest Material on Earth | AMNH

The mineral zircon serves as a tiny time capsule, recording geologic events. The oldest discovered grains are almost as old as the Earth itself!

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