Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse

A. Bornemann; R. Norris; O. Friedrich; Britta Beckmann; S. Schouten; J. S. Damsté; J. Vogel; P. Hofmann; T. Wagner

DOI:10.1126/science.1148777

Corpus ID: 206509273

Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse

@article{Bornemann2008IsotopicEF,
  title={Isotopic Evidence for Glaciation During the Cretaceous Supergreenhouse},
  author={A. Bornemann and R. Norris and O. Friedrich and Britta Beckmann and S. Schouten and J. S. Damsté and J. Vogel and P. Hofmann and T. Wagner},
  journal={Science},
  year={2008},
  volume={319},
  pages={189 - 192}
}

A. Bornemann, R. Norris, +6 authors T. Wagner

Published 2008

Medicine, Geology

Science

The Turonian (93.5 to 89.3 million years ago) was one of the warmest periods of the Phanerozoic eon, with tropical sea surface temperatures over 35°C. High-amplitude sea-level changes and positive δ18O excursions in marine limestones suggest that glaciation events may have punctuated this episode of extreme warmth. New δ18O data from the tropical Atlantic show synchronous shifts ∼91.2 million years ago for both the surface and deep ocean that are consistent with an approximately 200,000-year… CONTINUE READING

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