C 14 radiocarbon dating
Some examples of the types of material that radiocarbon can determine the ages of are wood, charcoal, marine and freshwater shell, bone and antler, and peat and organic-bearing sediments.
Age determinations can also be obtained from carbonate deposits such as calcite, dissolved carbon dioxide, and carbonates in ocean, lake, and groundwater sources.
Radiocarbon dating is considered one of science’s tried-and-true methodologies.
But could there be a forensic flaw in measuring carbon-14 dates using conventional methodology?
Could dates assigned by that method be vulnerable to faulty assumptions that render them invalid? The age assignment for certain Viking bones caused a decades-long controversy until the carbon-14 methodology used to date them was recently exposed for its flawed assumptions.
A mass burial of 250 to 300 skeletons was discovered in the Derbyshire village of Repton, England, in the 1980s.
However, at the moment of death, the amount of carbon-14 begins to decrease because it is unstable, while the amount of carbon-12 remains constant in the sample.
Therefore, unless dietary differences are adjusted for, carbon-dated skeletons of fish-eating Vikings appear to be about a hundred years or more older than they really are.
They seem to be “missing” so much of the expected carbon-14 that they are interpreted as having died centuries earlier than they actually did.
Since Nitrogen gas makes up about 78 percent of the Earth's air, by volume, a considerable amount of Carbon-14 is produced.
The carbon-14 atoms combine with oxygen to form carbon dioxide, which plants absorb naturally and incorporate into plant fibers by photosynthesis.