Abstract
The complete and well-studied pelagic carbonate successions from the Umbria- Marche basin (Italy) permit the study of the event-rich stratigraphic interval around the Cretaceous-Paleogene boundary (e.g., Deccan volcanism, boundary impact, Paleocene recovery, and climate). To test the robustness of various proxy records (bulk carbonate δ13C, δ18O, 87Sr/86Sr, and Ca, Fe, Sr, and Mn concentrations) inside the Umbria-Marche basin, several stratigraphically equivalent sections were investigated (Bottaccione Gorge, Contessa Highway, Fornaci East quarry, Frontale, Morello, and Petriccio core). Besides the classical Gubbio sections of Bottaccione and Contessa, the new Morello section is put forward as an alternative location for this stratigraphic interval because it is less altered by burial diagenesis. Elemental profiles (Ca, Fe, Sr, Mn) acquired by handheld X-ray fluorescence (pXRF) efficiently provide regional chemostratigraphic and paleoenvironmental information. The Deccan volcanism, the Cretaceous-Paleogene boundary, the characteristic pattern of the Sr/Ca profile across the boundary driven by the extinction and recovery of coccolithophores, and the Dan- C2 hyperthermal event are examples of such recorded paleoenvironmental events. Moreover, cyclostratigraphic analyses of proxies of detrital input (magnetic susceptibility and Fe concentrations) show the imprint in the sedimentary record of a 2.4 m.y. eccentricity minimum around 66.45-66.25 Ma, and suggest that the occurrence of the Dan-C2 hyperthermal event was astronomically paced.
Original language | English |
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Title of host publication | 250 Million Years of Earth History in Central Italy |
Subtitle of host publication | Celebrating 25 Years of the Geological Observatory of Coldigioco |
Editors | Christian Koeberl, David M. Bice |
Publisher | Geological Society of America |
Pages | 133-158 |
Number of pages | 26 |
ISBN (Electronic) | 9780813795423 |
ISBN (Print) | 9780813725420 |
DOIs | |
Publication status | Published - 2019 |
Publication series
Name | Special Paper of the Geological Society of America |
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Publisher | Geological Society of America |
Volume | 542 |
ISSN (Print) | 0072-1077 |
Bibliographical note
Funding Information:This research was supported by the Association “Le Montagne di San Francesco” in Coldigioco, Italy. Matthias Sinnesael thanks the Research Foundation of Flanders (FWO) for the awarded Ph.D. fellowship (FWOTM782). Christophe Snoeck was supported by a FWO postdoctoral fellowship. Niels J. de Winter was funded by an awarded Agentschap voor Innovatie door Wetenschap en Technologie (IWT) Ph.D. Flanders fellowship (IWT700-SB-141047). Philippe Claeys thanks the FWO-Hercules foundation for financing the X-ray fluorescence analytical platform at the Vrije Universiteit Brussel, and Vrije Uni-versiteit Brussel for strategic research funding. We thank Nicola Swinburne for the strontium isotope work, Stef Vansteenberge for constructive comments, and Jan Smit for interesting discussions. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. government.
Publisher Copyright:
© 2019 The Geological Society of America. All rights reserved.