Dating Techniques

Dating Techniques - Dating Techniques Chapter 9 in textbook...

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Dating Techniques Chapter 9 in textbook
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Provenience Estimation of fossil age Techniques fall under 3 main categories: Relative dating – use stratigraphy Calibrated relative dating – compares relative date to absolute time scale Chronometric (Absolute) dating – absolute clock giving age in an estimate of years before present
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Relative Dating Techniques Lithostratigraphy Strata analyzed for their formation, stratigraphic relationships, and relative time relationships based on their lithologic (rock) properties Figure 9.6
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Tephrostatigraphy Form of Lithostratigraphy Identification of volcanic ash using chemical fingerprint Biostratigraphy Using biological organisms to correlate age between sites and thus give an age to a layer Chemical techniques Analysis of fluorine, uranium, and nitrogen content of the fossils themselves. • Bones will take up fluorine and other chemicals from the soil • Measure this amount and get an estimate of how long it has been buried Can vary across sites, but useful within them.
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Dating Techniques - Dating Techniques Chapter 9 in textbook...

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