Waikato university radiometric dating

It takes 5,730 years for half the carbon–14 to change to nitrogen; this is the half–life of carbon–14.

After another 5,730 years only one–quarter of the original carbon–14 will remain.

One of the most widely used is the Potassium-argon_dating (K/A) technique.

Carbon–14 moves up the food chain as animals eat plants and as predators eat other animals.The stone map inscriptions may have contaminated by foreign material from any time period in history.In addition the stone maps are not believed to be 600 years old, so they don't meed the first criteria for radiocarbon dating.This is a radiometric technique since it measures radioactive decay.Carbon–14 is an unstable isotope of normal carbon, carbon–12.

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