High-precision timeline for Earth’s most severe extinction

The end-Permian mass extinction was the most severe loss of marine and terrestrial biota in the last 542 My. Understanding its cause and the controls on extinction/recovery dynamics depends on an accurate and precise age model. U-Pb zircon dates for five volcanic ash beds from the Global Stratotype Section and Point for the Permian-Triassic boundary at Meishan, China, define an age model for the extinction and allow exploration of the links between global environmental perturbation, carbon cycle disruption, mass extinction, and recovery at millennial timescales. The extinction occurred between 251.941 ± 0.037 and 251.880 ± 0.031 Mya, an interval of 60 ± 48 ka. Onset of a major reorganization of the carbon…

• NS
  National Science Foundation

  Awards: EAR-0931839, 0807475, 0931839
• NA
  National Aeronautics and Space Administration

  Award: NNA08CN84A
• NN
  National Natural Science Foundation of China

  Award: 41290260