Sam Bowring

Sam Bowring specialized in high-precision uranium-lead (U-Pb) geochronology using zircon crystals. His laboratory work at MIT established exact absolute time constraints for major evolutionary and geological events deep in the Earth's history.

Bowring utilized U-Pb zircon dating to determine that the Permian-Triassic extinction event occurred incredibly rapidly, likely over a span of just tens of thousands of years. His precise geochronology proved that this catastrophic extinction, which occurred roughly 252 million years ago, was much faster than previously thought.

Bowring was a long-time professor of geology at the Massachusetts Institute of Technology (MIT). At his MIT lab, he and his team pioneered new methods in high-precision isotope geology to map the deep-time evolution of the Earth's crust.

While he studied ancient crusts globally, Bowring was particularly famous for his fieldwork on the 1.5-billion-year-old Belt Supergroup in the northwestern United States. His research heavily focused on unraveling the tectonic history of Precambrian rocks across North America.