Enregistrement des événements remarquables de la limite Crétacé–Tertiaire dans la coupe d'Ellès (Tunisie)
| Autor: | Narjess Karoui-Yaakoub, Robert Rocchia, Dalila Zaghbib-Turki, Habib Belayouni, Eric Robin |
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| Přispěvatelé: | Université de Tunis, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) |
| Jazyk: | francouzština |
| Rok vydání: | 2000 |
| Předmět: |
Extinction event
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere 010506 paleontology biology Ocean Engineering Biozone 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Foraminifera Paleontology Stratotype Organic component Shocked quartz [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Ecology Evolution Behavior and Systematics Geology ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science, 2000, 331 (2), pp.141-149. ⟨10.1016/S1251-8050(00)01390-2⟩ Comptes Rendus de l'Académie des Sciences-Series IIA-Earth and Planetary Science, Elsevier, 2000, 331 (2), pp.141-149. ⟨10.1016/S1251-8050(00)01390-2⟩ |
| ISSN: | 1778-4107 |
| DOI: | 10.1016/S1251-8050(00)01390-2⟩ |
| Popis: | The review of the Cretaceous–Paleogene interval deposits of the Elles section based on a detailed sampling gives a good characterization of the K/T boundary and reconstitution of the geological events underlining this boundary. Thus, the discovery of a thin Ir-rich layer, with Ni and Cr-rich spinel and shocked quartz is a well preserved record of the known cosmic event that occurred at that time. This sudden event is also corroborated by the quantitative and qualitative organic components distribution along the K/T interval. Added to some other long-term events (e.g. climatic, eustatic), it generated a mass extinction, at the K/T boundary, of specialists among the Globotruncanids and Heterohelicids planktic foraminifera species. Following this biological crisis, the biotic turnover into the Danian is slow. The underlining of all the Cretaceous–Tertiary interval biozones attests that the Elles section is complete. If compared to the K/T stratotype and El Kef II sections, the Elles section is found to display a better exposure of the K/T interval and shows more expanded zones and subzones. Such characteristics promote the Elles section to be considered as a parastratotype. |
| Databáze: | OpenAIRE |
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