The age of most ancient geological formations is estimated by
-
Ra - Si method
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Potassium - argon method
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C14 method
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Uranium - lead method
D
Correct answer
Explanation
The uranium-lead radiometric dating method has a very long half-life, making it ideal for determining the age of extremely ancient geological formations, rocks, and minerals that are millions or billions of years old. Carbon-14 is used for much younger organic materials.