Glass from the Cretaceous/Tertiary boundary in Haiti

@article{Sigurdsson1991GlassFT,
  title={Glass from the Cretaceous/Tertiary boundary in Haiti},
  author={Haraldur Sigurdsson and Steven d'Hondt and Michael A. Arthur and Timothy J. Bralower and James C. Zachos and Mickey C. Van Fossen and James E. T. Channel},
  journal={Nature},
  year={1991},
  volume={349},
  pages={482-487}
}
Tektite-like glasses preserved at the Cretaceous/Tertiary boundary at Beloc in Haiti provide clear evidence of an impact event. The glass composition suggests that the impact occurred on a continental shelf region, generating a silica-rich glass with chemical composition that reflects the melting of continental crustal rocks, and a calcium-rich glass produced by the fusion of marl sediments. These findings indicate that catastrophic release to the atmosphere of 1015 moles of C02 from vaporized… CONTINUE READING