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Instructional Video
Khan Academy: Measuring Age on Earth: Potassium Argon (K Ar) Dating Instructional Video
Khan Academy

Khan Academy: Measuring Age on Earth: Potassium Argon (K Ar) Dating

9th - 10th
Video lecture explores how K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between. [10:35]
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