The overlapping nature of the tree records means this is the most accurate record we have. There will of course be several possible calendar years within the expected range, which is why radiocarbon dates come with a variation such as +/- 25 years for example (11).
What is the range for radiocarbon dating?
~ 300 to ~ 50,000 years Because of this relatively short half-life, radiocarbon dating has a useable range of ~ 300 to ~ 50,000 years (Briner, 2011; Guilderson et al., 2005).
How are radiocarbon dates expressed?
Radiocarbon dating works by comparing the three different isotopes of carbon. The total mass of the isotope is indicated by the numerical superscript. While the lighter isotopes 12C and 13C are stable, the heaviest isotope 14C (radiocarbon) is radioactive. This means its nucleus is so large that it is unstable.
What are the benefits of relative dating?
Dating rocks using relative dating allows a geologist to reconstruct a series of events cheaply, often very quickly, and can be used out in the field on a rocky outcrop. Relative dating also can be used on many different types of rocks, where absolute dating is restricted to certain minerals or materials.
Radiocarbon dating is used to find the age of once-living materials between 100 and 50,000 years old. This range is especially useful for determining ages of human fossils and habitation sites (Figure below). Only carbon-14 is radioactive; it has a half-life of 5,730 years.