The age of most ancient geological formations is estimated by

A Ra - Si method
B Potassium - argon method
C C<sup>14</sup> method
D Uranium - lead method

Correct Answer: Uranium - lead method

The Uranium Lead Method, also known as the U-Pb method, is one of the most ancient and reliable radiometric dating methods. It is used to date rocks and crystals that were formed more than a billion years ago. It has a range of dating samples that are about 1billion to 4.5billion years old. It has a precision rate of 0.1−1 percent.
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A 6
B 10
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A 15
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A 3 years
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B 10
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