The work combines thousands of data points from tree rings, lake and ocean sediments, corals and stalagmites, among other features, and extends the time frame for radiocarbon dating back to 55,000 years ago — 5,000 years further than the last calibration update in 2013.

What is the range of carbon dating?

300 to ~ 50,000 years Through this process, radiocarbon has a half-life of 5568 years (Alves et al., 2018). 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).