Radiocarbon dating is therefore limited to objects that are younger than 50,000 to 60,000 years or so. (Since humans have only existed in the Americas for approximately 12,000 years, this is not a serious limitation to southwest archaeology.) Radiocarbon dating is also susceptible to contamination.

Which of the following is most accurate in determining the age of a fossil?

The age of fossils is determined by figuring out the age of the rock in which the fossil is found. The most accurate method is radiometric dating .