Jolley, D . W.; Gilmour, I.; Gurov, E.; Kelley, S. P. and Watson, J.
(2010).
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| DOI (Digital Object Identifier) Link: | http://dx.doi.org/doi:10.1130/G31034.1 |
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| Google Scholar: | Look up in Google Scholar |
Abstract
The end Cretaceous mass extinction has been attributed to a single asteroid impact at Chicxulub on the Yucatan peninsula, Mexico. The discovery of a second smaller crater at Boltysh in the Ukraine with a similar age has raised the possibility that a shower of asteroids or comets impacted Earth close to the K/Pg boundary. Here we present palynological and del13C evidence from crater fill sediments in the Boltysh impact crater. Our analyses demonstrate that a post-impact flora formed on the ejecta layer, was in turn devastated by the K/Pg events. The sequence of floral recovery from the K/Pg event is directly comparable with that in mid North America. We conclude that the Boltysh crater pre-dated Chicxulub by approximately 2ky - 5ky a timescale that constrains the likely origin of the bodies that formed the two known K/Pg craters.
| Item Type: | Journal Article |
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| Copyright Holders: | 2010 The Geological Society of America |
| ISSN: | 0091-7613 |
| Academic Unit/Department: | Science > Physical Sciences |
| Interdisciplinary Research Centre: | Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR) |
| Item ID: | 22382 |
| Depositing User: | Simon Kelley |
| Date Deposited: | 22 Jul 2010 14:09 |
| Last Modified: | 25 Nov 2012 03:42 |
| URI: | http://oro.open.ac.uk/id/eprint/22382 |
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