Question: Which dating method is used to date rocks older than 100 000 years?

Which dating method can be used to date volcanic rocks between 2 billion and 100000 years old?

Radiometric datingDating methodMaterial datedAge range datedLuminescenceTephra, loess, lake sedimentsUp to 100,000 years agoFission trackTephra10,000 to 400 million years agoPotassium-40 to argon-40Volcanic rocks20,000 to 4.5 billion years agoUranium-238 to lead-206Volcanic rocks1 million to 4.5 billion years ago1 more row•20 May 2011

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