question archive The half-life of a sample of potassium-40 (40K) is approximately 13 billion years Potassium-40 decays into argon-40 (40Ar) Some rocks containing potassium-40 have been here since the earth formed and have been accumulating argon-40 to the present day When rocks are super-heated by volcanic action, all the40Ar escapes the rock How would geologists use potassium-argon dating to determine how long ago a volcanic eruption occurred?
The half-life of a sample of potassium-40 (40K) is approximately 13 billion years Potassium-40 decays into argon-40 (40Ar) Some rocks containing potassium-40 have been here since the earth formed and have been accumulating argon-40 to the present day When rocks are super-heated by volcanic action, all the40Ar escapes the rock How would geologists use potassium-argon dating to determine how long ago a volcanic eruption occurred?
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The half-life of a sample of potassium-40 (40K) is approximately 13 billion years Potassium-40 decays into argon-40 (40Ar) Some rocks containing potassium-40 have been here since the earth formed and have been accumulating argon-40 to the present day When rocks are super-heated by volcanic action, all the40Ar escapes the rock How would geologists use potassium-argon dating to determine how long ago a volcanic eruption occurred?
