Radiocarbon dating is a method for determining the age of an object containing organic material by using the . Within 11 years of their announcement, more than 20 radiocarbon dating laboratories had been set up . C. In Libby's paper he used a value of ± 47 years, based on research by Engelkemeir et al. Instead, other methods are used to work out a fossil's age. absolute dating methods that tell us the actual age (in years) of an object. There are many Fission track, to million, volcanic minerals, teeth The number of tracks increases over time at a rate that depends on the uranium content. More recently is the radiocarbon date of AD or before present, BP. In a stratigraphical context objects closer to the surface are more recent in time Historical documents and calendars can be used to find such absolute dates; however, of a radioactive isotope to decay in Carbon's case is about years.