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Because the half-life of carbon-14 is 5,700 years, it is only reliable for dating objects up to about 60,000 years old. However, the principle of carbon-14 dating applies to other isotopes as well. Potassium-40 is another radioactive element naturally found in your body and has a half-life of billion years. Other useful radioisotopes for radioactive dating include Uranium -235 (half-life = 704 million years), Uranium -238 (half-life = billion years), Thorium-232 (half-life = 14 billion years) and Rubidium-87 (half-life = 49 billion years).

Carbon-14 dating is a way of determining the age of certain archeological artifacts of a biological origin up to about 50,000 years old. It is used in dating things such as bone, cloth, wood and plant fibers that were created in the relatively recent past by human activities.

UGA’s Jennifer Birch and Cornell University’s Sturt Manning are investigators for a National Science Foundation grant, “Establishing a High-Resolution Framework for Age Determination.” A team including graduate assistant Megan Anne Conger works to date Northern Iroquoian sites…


Environmental dating sites

Environmental dating sites