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The age of most ancient geological formations is estimated by

1. Potassium–argon method
2. Carbon-14 dating method
3. Radium-silicon method
4. Uranium-lead method

Correct answer: Uranium-lead method

Solution

The uranium-lead method is commonly used to estimate the age of ancient geological formations because it is effective for dating rocks that are billions of years old, unlike carbon-14 which is limited to younger samples.

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