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| can be accurate to within or better (This technique is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better. WAD Alexander Demidov) | |||
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| can be accurate to within or better (This technique is our only means of giving rocks greater than about 50 million years old an absolute age, and can be accurate to within 0.5% or better. WAD Alexander Demidov) | |||