Granite batholith radiometric dating


29-Sep-2019 22:43

Second, the rock or mineral must not lose or gain either potassium or argon from the time of its formation to the time of analysis.By many experiments over the past three decades, geologists have learned which types of rocks and minerals meet these requirements and which do not.Radiometric dating is based on the decay of long-lived radioactive isotopes that occur naturally in rocks and minerals.

James Joly calculated that the Earth’s age was 89 million years on the basis of the time required for salt to accumulate in the oceans.My purpose here is not to review and discuss all of the dating methods in use.



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