Large temperature drop across the Eocene–Oligocene transition in central North America

@article{Zanazzi2007LargeTD,
  title={Large temperature drop across the Eocene–Oligocene transition in central North America},
  author={Alessandro Zanazzi and Matthew J. Kohn and Bruce J. MacFadden and Dennis O. Terry},
  journal={Nature},
  year={2007},
  volume={445},
  pages={639-642}
}
The Eocene–Oligocene transition towards a cool climate (∼33.5 million years ago) was one of the most pronounced climate events during the Cenozoic era. The marine record of this transition has been extensively studied. However, significantly less research has focused on continental climate change at the time, yielding partly inconsistent results on the magnitude and timing of the changes. Here we use a combination of in vivo stable isotope compositions of fossil tooth enamel with diagenetic… 

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