George Tilton
George Tilton (June 3, 1923 – October 12, 2010) was an American geochemist who specialized in uranium-lead geochronology. He was the first to measure a U-Pb date on zircon and was instrumental in developing analytical techniques for the measurement of U, Th, and Pb in minerals and rocks, using isotope dilution and mass spectrometry. Provided by Wikipedia-
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