Source carbon 14 used radiocarbon dating
Radiocarbon Dating of Calcined Bones: Insights from Combustion Experiments Under Natural Conditions. Zazzo, Antoine Saliège, Jean-François Lebon, Matthieu Lepetz, Sébastien and Moreau, Christophe 2012.
Caforio, Lucia Fedi, Mariaelena Liccioli, Lucia and Salvini, Antonella 2013. C) is also known as radiocarbon, because it is the only carbon isotope that is radioactive.It is perhaps most famous for its use in radiocarbon dating of archeological artifacts ranging from mummies to cave drawings, and it plays a crucial role in studying fossil fuel carbon dioxide emissions as well.Carbon-14 dating cannot be applied to materials that have no C dates are less than that figure.It is sometimes thought possible to extend the dating range a few half-lives, so one occasionally sees dates as old as 70,000 years or more.