Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.
Yes, but carbon 14 has a relatively short half life, so other radioactive elements are used to determine longer periods of time (as in this case). Other isotopes used are uranium to thorium or lead, samarium to neodymium, potassium to argon.
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