Sheridan Bowman, Radiocarbon Dating: Interpreting the Past 1990 , University of California Press Further Reading:.
Another example is driftwood, which may be used as construction material.
After about 10 half-lives, the amount of radiocarbon left becomes too miniscule to measure and so this technique isn't useful for dating specimens which died more than 60,000 years ago.
It is for specimens which only date back a few thousand years.
The above calculations make several assumptions, such as that the level of 14 C in the atmosphere has remained constant over time.
But every 5,730 years, half of the carbon-14 decays.
Paris, London, New York: Delamere Publishing, 2006 , pp.
In addition, if a piece of wood is used for multiple purposes, there may be a significant delay between the felling of the tree and the final use in the context in which it is found.