An Early Jurassic age for the Puchezh‐Katunki impact structure (Russia) based on 40 Ar/ 39 Ar data and palynology

@article{HolmAlwmark2019AnEJ,
  title={An Early Jurassic age for the Puchezh‐Katunki impact structure (Russia) based on
 40
 Ar/
 39
 Ar data and palynology},
  author={Sanna Holm‐Alwmark and Carl Alwmark and Ludovic Ferri{\`e}re and Sofie Lindstr{\"o}m and Matthias M. M. Meier and Anders Scherst{\'e}n and Maria Herrmann and Victor L. Masaitis and Mikhail S. Mashchak and M. V. Naumov and Fred Jourdan},
  journal={Meteoritics \& Planetary Science},
  year={2019}
}
The Puchezh-Katunki impact structure, 40–80 km in diameter, located ~400 km northeast of Moscow (Russia), has a poorly constrained age between ~164 and 203 Ma (most commonly quoted as 167 ± 3 Ma). Due to its relatively large size, the Puchezh-Katunki structure has been a prime candidate for discussions on the link between hypervelocity impacts and extinction events. Here, we present new 40Ar/39Ar data from step-heating analysis of five impact melt rock samples that allow us to significantly… 
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