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The top documents tagged [zircon crystal]
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zircon crystal
Geophysics 23 (2) Geochronology Introduction to Geophysics and Planetary Physics.
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Precambrian Era By Erich Hartman. When It Occurred The Precambrian Era occurred from 4.6 billion years ago to 544 million years ago. It was the first.
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Absolute Age Dating
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The Coyote Chronicle
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