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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/30474

Title: Bottom-Water Conditions in a Marine Basin after the Cretaceous–Paleogene Impact Event: Timing the Recovery of Oxygen Levels and Productivity
Authors: Sosa-Montes de Oca, Claudia
Martínez-Ruiz, Francisca
Rodríguez-Tovar, Francisco J.
Issue Date: Dec-2013
Abstract: An ultra-high-resolution analysis of major and trace element contents from the Cretaceous–Paleogene boundary interval in the Caravaca section, southeast Spain, reveals a quick recovery of depositional conditions after the impact event. Enrichment/depletion profiles of redox sensitive elements indicate significant geochemical anomalies just within the boundary ejecta layer, supporting an instantaneous recovery –some 102 years– of pre-impact conditions in terms of oxygenation. Geochemical redox proxies point to oxygen levels comparable to those at the end of the Cretaceous shortly after impact, which is further evidenced by the contemporary macrobenthic colonization of opportunistic tracemakers. Recovery of the oxygen conditions was therefore several orders shorter than traditional proposals (104–105 years), suggesting a probable rapid recovery of deep-sea ecosystems at bottom and in intermediate waters.
Sponsorship: This research was supported by Projects CGL2009-07603, CGL2008-03007, CGL2012-33281 and CGL2012-32659 (Secretaría de Estado de I+D+I, Spain), Projects RNM-3715 and RNM 05212, and Research Groups RNM-178 and 0179 (Junta de Andalucía).
Publisher: Public Library of Science (PLOS)
Keywords: Cretaceous period
Marine geology
Species extinction
Trace elements
URI: http://hdl.handle.net/10481/30474
ISSN: 1932-6203
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Sosa-Montes de Oca, C.; Martínez-Ruiz, F.; Rodríguez-Tovar, F.J. Bottom-Water Conditions in a Marine Basin after the Cretaceous–Paleogene Impact Event: Timing the Recovery of Oxygen Levels and Productivity. Plos One, 8(12): e82242 (2013). [http://hdl.handle.net/10481/30474]
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