Abstract

Tom Krogh revolutionized the field of precise U–Pb geochronology through a series of ground-breaking technical advances in the 1970s and 1980s that changed our investigative approach to understanding geologic processes. Earth scientists around the world have used his dating methods for more than 30 years to produce high-precision ages that have advanced our knowledge of Earth’s evolution through time. Tom applied these techniques to investigate the formation of ancient crust in the Superior and Grenville provinces, and other orogens, and the timing of terrestrial impacts. His legacy is built upon these scientific contributions, the many people he trained and inspired, and the global distribution of laboratories that use his methods.

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