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Multi-proxy record of the Chicxulub impact at the Cretaceous-Paleogene boundary from Gorgonilla Island, Colombia

2018; Geological Society of America; Volume: 46; Issue: 6 Linguagem: Inglês

10.1130/g40224.1

1943-2682

Paul R. Renne, Ignacio Arenillas, José Antonio Arz, Vivi Vajda, Vicente Gilabert, Hermann D. Bermúdez,

Geological and Tectonic Studies in Latin America

Research Article| April 26, 2018 Multi-proxy record of the Chicxulub impact at the Cretaceous-Paleogene boundary from Gorgonilla Island, Colombia Paul R. Renne; Paul R. Renne 1Berkeley Geochronology Center, Berkeley, California 94709, USA2Department of Earth and Planetary Science, University of California, Berkeley, California 94709, USA Search for other works by this author on: GSW Google Scholar Ignacio Arenillas; Ignacio Arenillas 3Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, E-50009 Zaragoza, Spain Search for other works by this author on: GSW Google Scholar José A. Arz; José A. Arz 3Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, E-50009 Zaragoza, Spain Search for other works by this author on: GSW Google Scholar Vivi Vajda; Vivi Vajda 4Swedish Museum of Natural History, Department of Palaeobiology, SE-104 05 Stockholm, Sweden Search for other works by this author on: GSW Google Scholar Vicente Gilabert; Vicente Gilabert 3Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, E-50009 Zaragoza, Spain Search for other works by this author on: GSW Google Scholar Hermann D. Bermúdez Hermann D. Bermúdez 5Grupo de Investigación Paleoexplorer, St. George, Vermont 05495, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Paul R. Renne 1Berkeley Geochronology Center, Berkeley, California 94709, USA2Department of Earth and Planetary Science, University of California, Berkeley, California 94709, USA Ignacio Arenillas 3Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, E-50009 Zaragoza, Spain José A. Arz 3Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, E-50009 Zaragoza, Spain Vivi Vajda 4Swedish Museum of Natural History, Department of Palaeobiology, SE-104 05 Stockholm, Sweden Vicente Gilabert 3Departamento de Ciencias de la Tierra, and Instituto Universitario de Investigación en Ciencias Ambientales de Aragón, Universidad de Zaragoza, E-50009 Zaragoza, Spain Hermann D. Bermúdez 5Grupo de Investigación Paleoexplorer, St. George, Vermont 05495, USA Publisher: Geological Society of America Received: 01 Mar 2018 Revision Received: 10 Apr 2018 Accepted: 13 Apr 2018 First Online: 26 Apr 2018 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2018 Geological Society of America Geology (2018) 46 (6): 547–550. https://doi.org/10.1130/G40224.1 Article history Received: 01 Mar 2018 Revision Received: 10 Apr 2018 Accepted: 13 Apr 2018 First Online: 26 Apr 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Paul R. Renne, Ignacio Arenillas, José A. Arz, Vivi Vajda, Vicente Gilabert, Hermann D. Bermúdez; Multi-proxy record of the Chicxulub impact at the Cretaceous-Paleogene boundary from Gorgonilla Island, Colombia. Geology 2018;; 46 (6): 547–550. doi: https://doi.org/10.1130/G40224.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A 40 m stratigraphic section at Gorgonilla Island, Colombia, provides a unique deep-marine, low-latitude, Southern Hemisphere record of events related to the end-Cretaceous Chicxulub impact and the global Cretaceous/Paleogene boundary (KPB). The KPB is marked by a 20-mm-thick, densely packed spherule bed as defined by planktic foraminifera, in contrast to complex relationships found in high-energy, impact-proximal sites in the Gulf of Mexico and Caribbean basins. The absence of basal Danian foraminiferal Zone P0 may indicate a possible hiatus of <10 ka immediately above the spherule bed, but is most probably an artifact of deposition below the calcite compensation depth as suggested by the nearly complete absence of calcareous fossils for 20 m below the Zone Pα. A weighted mean 40Ar/39Ar age of 66.051 ± 0.031 Ma for 25 fresh glassy spherules unequivocally establishes both their derivation from Chicxulub, and the association between the impact and the KPB. The spherule bed, and Maastrichtian strata below it, display soft-sediment deformation features consistent with strong seismic motion, suggesting that seismic activity in the immediate aftermath of the Chicxulub impact continued for weeks. We discovered a fern-spike immediately above the spherule bed, representing the first record of this pioneer vegetation from the South American continent, and from a low-latitude (tropical) environment. 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