Radiocarbon dating bone samples radiocarbon dating controversy

02 Aug

However, for the last 3,500 years, the increase in the ratio has been extremely slight.

Radiocarbon dating of vertical sequences of organic-rich layers at 714 locations worldwide has consistently shown a surprising result.

Actually, that ratio may have been quite different.

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With less carbon-12 to dilute the carbon-14 continually forming from nitrogen in the upper atmosphere, the ratio of carbon-14 to carbon-12 in the atmosphere would increase.

Plants take in carbon dioxide, incorporating in their tissues both carbon-14 (unstable) and normal carbon-12 (stable) in the same proportion as they occur in the atmosphere .

Carbon-14 then moves up the various food chains to enter animal tissueagain, in about the same ratio carbon-14 has with carbon-12 in the atmosphere.

When granite rock hardens, it freezes radioactive elements in place.

The most common radioactive element in granite is Uranium-238.