The formation of peak rings in large impact craters

@article{Morgan2016TheFO,
  title={The formation of peak rings in large impact craters},
  author={Joanna V. Morgan and Sean P. S. Gulick and Timothy J. Bralower and Elise Chenot and Gail L. Christeson and Philippe Claeys and Charles Cockell and Gareth S. Collins and Marco J. L. Coolen and Ludovic Ferri{\`e}re and Catalina Gebhardt and Kazuhisa Goto and Heather Jones and David A. Kring and E. Le Ber and Johanna Lofi and Xiao Long and Christopher M. Lowery and Claire L. Mellett and Rub{\'e}n Ocampo-Torres and Gordon R. Osinski and Ligia P{\'e}rez‐Cruz and Annemarie E. Pickersgill and Michael H. Poelchau and Auriol S. P. Rae and Cornelia Rasmussen and Mario Rebolledo-Vieyra and Ulrich Riller and Honami Sato and Douglas R. Schmitt and Jan Smit and Sonia M. Tikoo and Naotaka Tomioka and Jaime Urrutia‐Fucugauchi and Michael T. Whalen and Axel Wittmann and Kosei E. Yamaguchi and W. Zylberman},
  journal={Science},
  year={2016},
  volume={354},
  pages={878 - 882}
}
Drilling into Chicxulub's formation The Chicxulub impact crater, known for its link to the demise of the dinosaurs, also provides an opportunity to study rocks from a large impact structure. Large impact craters have “peak rings” that define a complex crater morphology. Morgan et al. looked at rocks from a drilling expedition through the peak rings of the Chicxulub impact crater (see the Perspective by Barton). The drill cores have features consistent with a model that postulates that a single… 

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Results from a drilling expedition into the Chicxulub crater are presented that reveal how the formation of peak rings in large impact craters occurs, and numerical simulations of the impact model the time scale of events.

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The core confirms the 'dynamic collapse' model of cosmic impacts, in which the asteroid punches a deep hole in the crust, causing the rock to flow like a liquid and spurt skyward, then falls back to Earth, splattering around in a peak ring.

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TLDR
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Large (>100 km) impact events have shaped the surfaces of terrestrial bodies in the inner Solar System. They have fundamentally altered the Earth’s geochemistry and may even have contributed to
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Geophysical data indicate that the 65.5 million years ago Chicxulub impact structure is a multi‐ring basin, with three sets of semicontinuous, arcuate ring faults and a topographic peak ring (PR).

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