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Bertram Borden Boltwood

(1870—1927)


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(1870–1927)

Professor of radiochemistry at Yale University, in 1907 Boltwood made early determinations of the age of the Earth using uranium:lead ratios. He was able to show a long geologic time-scale of up to 2000 Ma. See radiometric dating.

Subjects: Science and Mathematics.


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