Rafter carbon dating

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This carbon dioxide becomes incorporated in plants through the process of photosynthesis, and into animals via the food chain.

If you look at sediment building up over time, you know that the sediment at the bottom is going to be older than the sediment at the top, so any environmental changes that have occurred at the top of a core are younger than what has happened at the bottom of the core.The New Zealand Radiocarbon Database contains radiocarbon determinations and associated information for almost 3000 dates obtained from archaeological sites in this country over the past 40 years.Included are radiocarbon results from 7 laboratories, which are listed in the table below.This process of radioactive decay is the basis for the radiocarbon dating method.The 14C atoms rapidly oxidize, and become carbon dioxide (CO2).

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