Absolute AgeDating

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Absolute Age-Dating

• Methods include
• 1. radiometric dating
• 2. fission-track dating
• 3. dendrochronology
• 4. varve chronology
• 5. lichenometry

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Radiometric Dating

• Measures geologic time

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• Alpha decay of hydrogen to helium 3

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• Alpha decay

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• Positron decay of carbon

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• Electron capture of berylium

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• Gamma decay

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• Fission tracks in mineral