So, if you measure the amount of C14 in a dead is carbon dating inaccurate, you can figure out how long ago it stopped exchanging carbon with its atmosphere. Given relatively pristine circumstances, a radiocarbon lab can measure the amount of radiocarbon accurately in a dead organism for as long as 50, years ago; after that, there's not enough C14 left to measure. Tree Rings and Radiocarbon There is a problem, however. Carbon in the atmosphere fluctuates with the strength of earth's magnetic field and solar activity.
You have to know what the atmospheric carbon level the radiocarbon 'reservoir' was like at the time of an organism's death, in order to be able to calculate how much time has passed since the organism died. Fortunately, we do have an organic object that tracks carbon in the atmosphere on a yearly basis: tree rings. Trees maintain carbon 14 equilibrium in their growth rings — and trees produce a ring for every year they are alive.
So, in other words, we have a pretty solid way to calibrate raw radiocarbon dates for the most recent 12, years of our planet's past. Cave deposits and varves have the potential to include old soil carbon, and there are as-yet unresolved issues with fluctuating amounts of C14 in ocean corals. The latest curves were ratified at the 21st International Radiocarbon Conference in July of Lake Suigetsu, Japan Within the last few years, a new potential source for further refining radiocarbon curves is Lake Suigetsu in Japan.
Inaccuracies in radiocarbon dating
One of the most essential tools for determining an ancient object's age, carbon dating, might not be as accurate as we once thought. His technique, known as carbon dating, revolutionized the field of Earth's atmosphere is threatening to skew the accuracy of this technique for.