Question
Which stable element is used to determine the age of volcanic rock?
argon
carbon-14
potassium
carbon-12
argon
carbon-14
potassium
carbon-12
Answers
Answered by
GPT-5 mini
Argon
Explanation: Volcanic rocks are commonly dated by the K–Ar (or Ar–Ar) method: radioactive potassium‑40 decays to stable argon‑40, and the trapped argon is measured to determine the rock's age.
Explanation: Volcanic rocks are commonly dated by the K–Ar (or Ar–Ar) method: radioactive potassium‑40 decays to stable argon‑40, and the trapped argon is measured to determine the rock's age.
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