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8 Cards in this Set
- Front
- Back
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Eras |
Major divisions of geologic time that are divided into periods and further subdivided into epochs |
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Epochs |
Divisions of periods (which are the major divisions of eras) in geologic time |
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Fluorine dating |
A relative dating method that compares the accumulation of fluorine in animal and human bones from the same site |
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Chemical dating |
Dating methods that use predictable chemical changes that occur over time |
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Biostratigraphic dating |
Draws on the first appearance of an organism in the fossil record, that organism's evolutionary development over time and the organisms extinction |
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Paleomagnetic dating |
Based on the reversals of earths magnetic field |
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Electron spin resonance dating |
Uses microwave spectroscopy to measure electrons' spins in various metald |
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Thermoluminescence dating |
A relative dating method in which the energy trapped in a material is measured when the object is heated |
