Question: What is radiocarbon dating and potassium-argon dating?

Potassium-argon dating, method of determining the time of origin of rocks by measuring the ratio of radioactive argon to radioactive potassium in the rock. This dating method is based upon the decay of radioactive potassium-40 to radioactive argon-40 in minerals and rocks; potassium-40 also decays to calcium-40.

What is the difference between radiocarbon dating and potassium-argon dating?

By comparison, radiocarbon dates seem almost as precise as a cesium clock! Potassium-argon dating is accurate from 4.3 billion years (the age of the Earth) to about 100,000 years before the present. Eventually, potassium-argon dating may be able to provide dates as recent as 20,000 years before present.

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