@book{68,
  author = {Gerta Keller and Thierry Adatte},
  title = {The End-Cretaceous Mass Extinction and the Chicxulub Impact in Texas},
  abstract = {<p>One of the liveliest, contentious, and long-running scientific debates began over three decades ago with the discovery of an iridium anomaly in a thin clay layer at Gubbio, Italy, that led to the hypothesis that a large impact caused the end-Cretaceous mass extinction. For many scientists the discovery of an impact crater near Chicxulub on Yucatan in 1991 all but sealed the impact-kill hypothesis as proven with the impact as sole cause for the mass extinction. Ever since that time evidence to the contrary has generally been interpreted as an impact-tsunami disbturbance. A multi-disciplinary team of reserachers has tested this assertion in new cores and a dozen outcrops along the Brazos River, Texas. In this area undisturbed sediments reveal a complete time stratigraphic sequence containing the primary impact spherule ejecta layer in late Maastrichtian claystones deposited about 200-300 thousand years before the mass extinction.\&nbsp; <a href="https://geoweb.princeton.edu/research/keller/pubs/sp100_abstracts.pdf" target="_blank">PDF</a></p>
},
  year = {2011},
  number = {SEPM Special Publication Volume 100},
  publisher = {SEPM Society for Sedimentary Geology},
  issn = {9781565763081},
  isbn = {9781565763098},
  url = {http://ebooks.geoscienceworld.org/content/the-end-cretaceous-mass-extinction-and-the-chicxulub-impact-in-texas.tab-info},
  doi = {10.2110/sepmsp.100},
  language = {eng},
}