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2. Terrestrial records of deglaciation events during terminations V and IV in the central Apennines (Italy) and insights on deglacial mechanisms.

Author

Marra, F, Pereira, A, Jicha, B, Nomade, S, Biddittu, I, Florindo, F, Muttoni, G, Niespolo, EM, Renne, PR, and Scao, V

Subjects
Rivers, Ice Cover, Freezing, Italy, Sea Level Rise, Climate Action
Abstract

40Ar/39Ar geochronology constraints to aggradational phases and grain size variations show that the two large gravel beds occurring in the sedimentary filling of the Liri fluvial-lacustrine basin (central Italy) recorded the occurrence of deglaciation events synchronous within uncertainties with global meltwater pulses at ca. 450 and 350 ka. In particular, we find a precise match between the ages of gravel deposition and the occurrence of moderate sea-level rise events which anticipate those more marked during the glacial termination V and IV in the Red Sea relative sea level curve, as already verified by data from the Tiber River catchment basin. Such correspondence suggests that gravel deposition is facilitated by melting of Apennine mountain range glaciers, which provide the water transport energy and a surplus of clastic input to the rivers draining the mountain regions and flowing into the Tyrrhenian Sea. Therefore, the thick gravel beds intercalated in the sedimentary filling of the catchment basins of the major rivers in central Italy may be regarded as an equivalent proxy of large deglaciation events, similar to the ice-rafted debris in northern Atlantic. Consistent with this hypothesis, we also show the close correspondence between the occurrence of particularly mild (warmer) minima of the mean summer insolation at 65° N and these early aggradational phases, as well as with other anomalous early sea-level rises occurring c. 750 ka and 540 ka at the onset of glacial termination VIII and VI, and 40 ka at the onset of the so-called Heinrich events.

Published
2022

8. Precise dating of large flank collapses by single-grain 40Ar/39Ar on pyroclastic deposits from the example of Flores Island (Azores)

Author

Hildenbrand, A., Marques, F. O., Pereira, A., Nomade, S., and Hevia-Cruz, F.

Abstract

Large-scale flank collapses are one of the main hazards associated with the evolution of volcanic islands. Precisely dating such events is critical to evaluate the frequency of destabilization episodes and further assess the triggering mechanism(s) associated with internal and/or external factors, such as volcano dynamics, regional tectonics, and global paleoclimatic changes. Here, we constrain the age of a pumice-rich pyroclastic deposit exposed on the eastern flank of Flores Island (Azores), which we interpret as a co-blast deposit generated by a major flank collapse that destroyed the whole western flank of the former volcanic edifice. Twelve single-grain 40Ar/39Ar analyses, performed on 250–500 µm anorthoclase feldspars (mean K/Ca close to 5) with our high-sensitivity multi-collector NGX mass spectrometer, provide a robust weighted mean age of 1.32 ± 0.01 Ma for this eruption. This new age is consistent with previous K/Ar data bracketing the flank collapse between 1.30 ± 0.04 and 1.18 ± 0.09 Ma, and indicates that this event occurred at the end of the main construction phase of the volcano. The explosion produced pumice-rich layers preceded by a lahar as attested by a polygenetic mudflow deposit underlying the dated deposit. From the geochemistry of lavas erupted just before and after the collapse, we speculate upon the possible role of magmatic processes on flank destabilization. We propose a first hypothesis where differentiation in a shallow magma reservoir could have favored edifice inflation, ground shaking, and flank failure, triggering a decompression-induced violent eruption. Overall, our study shows that high-sensitivity mass spectrometers have now reached analytical performances allowing to measure precisely and accurately ages on relatively small and moderately K-rich single feldspars, which is of the utmost importance for dating heterogeneous blasts and tephra deposits that may have been induced by large-scale flank collapses during the late Quaternary. [ABSTRACT FROM AUTHOR]

Published
2024
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9. Expanded geographic distribution and dietary strategies of the earliest Oldowan hominins and Paranthropus

Author

Plummer, TW, Oliver, JS, Finestone, EM, Ditchfield, PW, Bishop, LC, Blumenthal, SA, Lemorini, C, Caricola, I, Bailey, SE, Herries, AIR, Parkinson, JA, Whitfield, E, Hertel, F, Kinyanjui, RN, Vincent, TH, Li, Y, Louys, J, Frost, SR, Braun, DR, Reeves, JS, Early, EDG, Onyango, B, Lamela-Lopez, R, Forrest, FL, He, H, Lane, TP, Frouin, M, Nomade, S, Wilson, EP, Bartilol, SK, Rotich, NK, Potts, R, 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), Paléocéanographie (PALEOCEAN), and 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)-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)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Multidisciplinary
Abstract

The oldest Oldowan tool sites, from around 2.6 million years ago, have previously been confined to Ethiopia’s Afar Triangle. We describe sites at Nyayanga, Kenya, dated to 3.032 to 2.581 million years ago and expand this distribution by over 1300 kilometers. Furthermore, we found two hippopotamid butchery sites associated with mosaic vegetation and a C4 grazer–dominated fauna. Tool flaking proficiency was comparable with that of younger Oldowan assemblages, but pounding activities were more common. Tool use-wear and bone damage indicate plant and animal tissue processing. Paranthropus sp. teeth, the first from southwestern Kenya, possessed carbon isotopic values indicative of a diet rich in C4 foods. We argue that the earliest Oldowan was more widespread than previously known, used to process diverse foods including megafauna, and associated with Paranthropus from its onset. Oldowan tools, consisting of stones with one to a few flakes removed, are the oldest widespread and temporally persistent hominin tools. The oldest of these were previously known from around 2.6 million years ago in Ethiopia, and by 2 million years ago, they were found to be quite widespread. Plummer et al. report on an older fossil site from around 3 to 2.6 million years ago in Kenya, where Oldowan tools were not only present, but were also being used to process a variety of foods, including hippopotamus. Thus, it appears that these tools were widespread much earlier than previous estimates and were widely used for food processing. Which hominins were using these tools remains uncertain, but Paranthropus fossils occur at the site. —SNV Ancient Oldowan sites from Nyayanga show evidence of hippo butchery, plant processing, and the first Paranthropus, a type of extinct hominin, from southwest Kenya.

Published
2023
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16. Mediterranean tephrostratigraphy and peri-Tyrrhenian explosive activity revaluated in light of the 430-365 ka record from Fucino Basin (central Italy)

Author

Monaco L.[1], Palladino D.M.[1], Gaeta M.[1], Marra F.[2], Sottili G.[1], Leicher N.[3], Mannella G.[4], Nomade S.[5], Pereira A.[6], Regattieri E.[7], Wagner B.[3], Zanchetta G.[2, 4, 12], Albert P.G.[8], Arienzo I.[9], D'Antonio M.[10], Petrosino P.[10], Manning C.J.[11], Giaccio B.[2, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Paléocéanographie (PALEOCEAN), 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)-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), Università degli Studi di Roma 'La Sapienza' = Sapienza University [Rome] (UNIROMA), Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Roma (INGV), Istituto Nazionale di Geofisica e Vulcanologia, Universität zu Köln = University of Cologne, University of Pisa - Università di Pisa, 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), 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)-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), Géosciences Paris Saclay (GEOPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), CNR Istituto di Geoscienze e Georisorse [Pisa] (IGG-CNR), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Swansea University, Monaco, L., Palladino, D. M., Gaeta, M., Marra, F., Sottili, G., Leicher, N., Mannella, G., Nomade, S., Pereira, A., Regattieri, E., Wagner, B., Zanchetta, G., Albert, P. G., Arienzo, I., D'Antonio, M., Petrosino, P., Manning, C. J., and Giaccio, B.

Subjects
010504 meteorology & atmospheric sciences, Geochemistry, Pyroclastic rock, Peri-Tyrrhenian explosive volcanism, Volcanism, 010502 geochemistry & geophysics, 01 natural sciences, Marine Isotope Stage 11, [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology, Mediterranean tephrochronology, Tephra, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, geography, Vulcanian eruption, geography.geographical_feature_category, Volcano, 13. Climate action, [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy, General Earth and Planetary Sciences, Sedimentary rock, Geology, Volcanic ash
Abstract

International audience; Accurately reconstructing the scale and timing of dynamic processes, such as Middle-Late Pleistocene explosive volcanism and rapid climatic changes, requires rigorous and independent chronological constraints. In this framework, the study of distal volcanic ash layers, or tephra, transported and deposited over wide regions during explosive volcanic eruptions, is increasingly being recognised as a fundamental chronostratigraphic tool for addressing these challenging issues. Here we present a high-resolution distal tephra record preserved in the lacustrine sedimentary succession of the Fucino Basin, central Italy. The investigated record spans the 430-365 ka time interval, covering the entirety of Marine Isotope Stage 11 (MIS 11), and provides important insights into peri-Tyrrhenian potassic explosive volcanism from sources located in central Italy against a backdrop of Mediterranean palaeooclimate records. The succession of ash fall events of this time interval is reconstructed through a detailed lithostratigraphic, geochemical and 40Ar/39Ar geochronological characterization of the deposits preserved as discrete layers in the Fucino F4-F5 sediment core. This work is complemented by similarly detailed characterization of selected proximal pyroclastic units from the peri-Tyrrhenian potassic volcanoes. Geochemical fingerprinting of the tephra deposits by means of their major, minor and trace elements and Sr isotope composition indicates that all the thirty-two investigated ash layers derived from the peri-Tyrrhenian potassic volcanoes. The stratigraphically continuous succession of the Fucino tephra layers allowed the development of a fully independent, 40Ar/39Ar age-constrained, Bayesian age-depth model for the investigated time interval. The age-model allows us to establish modelled ages for the tephra layers within the succession that are not directly dated. The resulting dated tephra record clearly reveals a highly time resolved and previously unparalelled chronicle of explosive activity from the Vulsini, Vico, Sabatini, Colli Albani and Roccamonfina volcanic complexes. Our study provides a benchmark and valuable geochemical and geochronological dataset to be used as a reference for any future development and application of the tephrostratigraphic methods across the central Mediterranean area both during the investigated 430-365 ka time interval, and deeper in time. This contribution underlines the importance of integrating proximal and distal sedimentary records to more accurately establish long-term and comprehensive volcanic eruption records.

Published
2021
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17. Linking the Mediterranean MIS 5 tephra markers to Campi Flegrei (southern Italy) 109–92 ka explosive activity and refining the chronology of MIS 5c-d millennial-scale climate variability

Author

Monaco, L, Palladino, D, Albert, P, Arienzo, I, Conticelli, S, Di Vito, M, Fabbrizio, A, D'Antonio, M, Isaia, R, Manning, C, Nomade, S, Pereira, A, Petrosino, P, Sottili, G, Sulpizio, R, Zanchetta, G, Giaccio, B, Palladino, DM, Albert, PG, Manning, CJ, Monaco, L, Palladino, D, Albert, P, Arienzo, I, Conticelli, S, Di Vito, M, Fabbrizio, A, D'Antonio, M, Isaia, R, Manning, C, Nomade, S, Pereira, A, Petrosino, P, Sottili, G, Sulpizio, R, Zanchetta, G, Giaccio, B, Palladino, DM, Albert, PG, and Manning, CJ

Abstract

Explosive activity preceding the ~40 ka Campanian Ignimbrite (CI) eruption in the Neapolitan volcanic area, Southern Italy, has long been speculated based on the occurrences of widespread tephra layers, with a Campanian geochemical signature, such as the C-22, X-5, and X-6, preserved in Mediterranean Marine Isotope Stage (MIS) 5 sedimentary records. However, previous studies of pre-CI pyroclastic units occurring in close proximity of the Neapolitan volcanoes, including Campi Flegrei, Somma-Vesuvius, Ischia and Procida islands, did not allow a conclusive identification of the near-source equivalents of these tephra markers. Here we present a comprehensive characterization of four pyroclastic units from the Campanian Plain, comprising major and trace element glass compositions, Sr[sbnd]Nd isotopes and 40Ar/39Ar dating. Our data allowed the identification of the medial equivalents of the MIS 5 tephra markers, including the widespread C-22, X-5, and X-6 tephra, and their assignment to previously undocumented Campi Flegrei activity between 109 and 92 ka. In addition to substantially extending Campi Flegrei explosive activity deeper in time, and thus providing the basis for a revaluation of its history, our findings provide new precise radioisotopic dating to better constrain the chronology of the millennial scale climatic oscillations of the MIS 5c-d in the Mediterranean area and possibly on a larger scale.

Published
2022

18. The Fucino 250–170 ka tephra record: New insights on peri-Tyrrhenian explosive volcanism, central mediterranean tephrochronology, and timing of the MIS 8-6 climate variability

Author

Monaco, L, Leicher, N, Palladino, D, Arienzo, I, Marra, F, Petrelli, M, Nomade, S, Pereira, A, Sottili, G, Conticelli, S, D'Antonio, M, Fabbrizio, A, Jicha, B, Mannella, G, Petrosino, P, Regattieri, E, Tzedakis, P, Wagner, B, Zanchetta, G, Giaccio, B, Palladino, DM, Jicha, BR, Tzedakis, PC, Monaco, L, Leicher, N, Palladino, D, Arienzo, I, Marra, F, Petrelli, M, Nomade, S, Pereira, A, Sottili, G, Conticelli, S, D'Antonio, M, Fabbrizio, A, Jicha, B, Mannella, G, Petrosino, P, Regattieri, E, Tzedakis, P, Wagner, B, Zanchetta, G, Giaccio, B, Palladino, DM, Jicha, BR, and Tzedakis, PC

Abstract

The Fucino Basin, central Italy, with its long and continuous history of Quaternary sediment accumulation, is one of the richest Mediterranean Middle Pleistocene tephra records. Here, we present a new detailed investigation of tephra layers (tephras) of the 250–170 thousand years before present (ka) interval, corresponding to the entire Marine Isotope Stage (MIS) 7 and parts of the MIS 8 and MIS 6. The investigated tephras have been characterised in terms of major, minor and trace elements, Sr–Nd isotopic compositions and 40Ar/39Ar ages. For correlation purposes, glass compositions and several new 40Ar/39Ar ages of selected proximal pyroclastic units spanning the same temporal interval from Vulsini (Latera Volcanic Complex), Sabatini, and Vico volcanic systems, central Italy, were measured. The late MIS 8-early MIS 6 Fucino tephras were backtracked to their corresponding volcanic sources, which include the Vulsini, Vico, Sabatini, Roccamonfina, Ischia and Campi Flegrei volcanic systems. While some of these tephras have been correlated to specific eruption units, other layers are currently not documented or described in near-vent sections, thus highlighting previously unrecognised events generated by these volcanic systems. Furthermore, the new high precision 40Ar/39Ar ages provide improved temporal constraints for Fucino making it one of the most detailed and chronologically best constrained tephra records for central Mediterranean MIS 7 tephrochronology. The Fucino record thus provides new integrative information for reconstructing the explosive history of Italian volcanoes during the investigated time interval. Furthermore, the geochronological constraints provide the basis for future paleoclimatic investigations at local and regional scale.

Published
2022

21. Interpreting and reporting 40Ar/39Ar geochronologic data

Author

Schaen, AJ, Jicha, BR, Hodges, K, Vermeesch, P, Stelten, ME, Mercer, CM, Phillips, D, Rivera, TA, Jourdan, F, Matchan, EL, Hemming, SR, Morgan, LE, Kelley, SP, Cassata, WS, Heizler, MT, Vasconcelos, PM, Benowitz, JA, Koppers, AAP, Mark, DF, Niespolo, EM, Sprain, CJ, Hames, WE, Kuiper, KF, Turrin, BD, Renne, PR, Ross, J, Nomade, S, Guillou, H, Webb, LE, Cohen, BA, Calvert, AT, Joyce, N, Ganerod, M, Wijbrans, J, Ishizuka, O, He, H, Ramirez, A, Pfander, JA, Lopez-Martinez, M, Qiu, H, Singer, BS, Schaen, AJ, Jicha, BR, Hodges, K, Vermeesch, P, Stelten, ME, Mercer, CM, Phillips, D, Rivera, TA, Jourdan, F, Matchan, EL, Hemming, SR, Morgan, LE, Kelley, SP, Cassata, WS, Heizler, MT, Vasconcelos, PM, Benowitz, JA, Koppers, AAP, Mark, DF, Niespolo, EM, Sprain, CJ, Hames, WE, Kuiper, KF, Turrin, BD, Renne, PR, Ross, J, Nomade, S, Guillou, H, Webb, LE, Cohen, BA, Calvert, AT, Joyce, N, Ganerod, M, Wijbrans, J, Ishizuka, O, He, H, Ramirez, A, Pfander, JA, Lopez-Martinez, M, Qiu, H, and Singer, BS

Abstract

The 40Ar/39Ar dating method is among the most versatile of geochronometers, having the potential to date a broad variety of K-bearing materials spanning from the time of Earth’s formation into the historical realm. Measurements using modern noble-gas mass spectrometers are now producing 40Ar/39Ar dates with analytical uncertainties of ∼0.1%, thereby providing precise time constraints for a wide range of geologic and extraterrestrial processes. Analyses of increasingly smaller subsamples have revealed age dispersion in many materials, including some minerals used as neutron fluence monitors. Accordingly, interpretive strategies are evolving to address observed dispersion in dates from a single sample. Moreover, inferring a geologically meaningful “age” from a measured “date” or set of dates is dependent on the geological problem being addressed and the salient assumptions associated with each set of data. We highlight requirements for collateral information that will better constrain the interpretation of 40Ar/39Ar data sets, including those associated with single-crystal fusion analyses, incremental heating experiments, and in situ analyses of microsampled domains. To ensure the utility and viability of published results, we emphasize previous recommendations for reporting 40Ar/39Ar data and the related essential metadata, with the amendment that data conform to evolving standards of being findable, accessible, interoperable, and reusable (FAIR) by both humans and computers. Our examples provide guidance for the presentation and interpretation of 40Ar/39Ar dates to maximize their interdisciplinary usage, reproducibility, and longevity.

Published
2021

22. Chronostratigraphy, depositional patterns and climatic imprints in Lake Acigol (SW Anatolia) during the Quaternary

Author

Demory, F., Rambeau, C., Lebatard, A.-E., Perrin, M., Blawal, S., Andrieu-Ponel, V., Rochette, P., Alçiçek, Hülya, Boulbes, N., Bourlès, D., Helvaci, C., Petschick, R., Mayda, S., Moigne, A.-M., Nomade, S., Ponel, P., Vialet, A., Alçiçek, Mehmet Cihat, Aumaître, G., Keddadouche, K., ASTER Team, Ege Üniversitesi, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Albert-Ludwigs-Universität Freiburg, Laboratoire Image, Ville, Environnement (LIVE), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Pamukkale University, Department of Geology, Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Dokuz Eylül University Department of Geology, J.W. Goethe Universität, Institut für Geowissenschaften, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany, Ege University, Department of Biology, Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Paléocéanographie (PALEOCEAN), 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)-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), ECCOREV Research Federation, projet EPICA, ANR-11-LABX-0061,OTMed,Objectif Terre : Bassin Méditerranéen(2011), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), 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), 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)-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), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Sedimentology, Albert-Ludwigs-Universität Freiburg, Centre Européen de Recherches Préhistoriques de Tautavel, Museum National d’Histoire Naturelle – UMR 7194, CNRS – Université de Perpignan Via Domitia, Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), and ANR: 11-LABX-0061,Labex OT- Med,ANR-11-LABEX-0061

Subjects
Paleomagnetism, paleoenvironment, reconstruction, 010504 meteorology & atmospheric sciences, Evaporite, Turkey, Stratigraphy, chronostratigraphy, 010502 geochemistry & geophysics, 01 natural sciences, Quaternary, Sedimentary depositional environment, Paleontology, paleoclimate, Earth and Planetary Sciences (miscellaneous), Chronostratigraphy, Paleoenvironmental reconstructions, Tephra, depositional environment, 0105 earth and related environmental sciences, lacustrine deposit, paleomagnetism, Geology, Quaternary paleoclimatic records, Lake sediment, 13. Climate action, Facies, [SDE]Environmental Sciences, Sedimentary rock, Paleomagnetic dating
Abstract

A 601 m long sedimentary sequence was drilled in Lake Acigöl, located in the lakes region of SW Anatolia, near the Denizli travertine from which the oldest hominin of Turkey was unearthed. Among all dating methods applied to the sedimentary sequence, paleomagnetism, through the recognition of geomagnetic chrons, was the most successful and led to a quasi linear age model, with the 601 m long sedimentary record covering the last 2.3 Ma. An attempt to use the atmospherically deposited 10Be as a dating method was not very successful but provides interesting clues on this new method. Long-term lake level changes are depicted through lithological variations, in particular the carbonates and evaporites abundance. This change could be influenced by both long term cooling during the last 2 Ma and tectonic activity, which may in particular be responsible for a maximum water depth at around 1.8 Ma. Despite active tectonic influence, the sedimentary facies description and the magnetic susceptibility record (cleaned from tephra intervals) show that climate fluctuations (i.e., glacial-interglacial alternations) are likely recorded in the sedimentary succession, with warm periods marked by enhanced carbonate precipitation and cold and dry periods characterized by more detrital input linked to reduced vegetation cover and consequently more erosion in the catchment area. Preliminary pollen data, used to interpret magnetic susceptibility fluctuations, show that an average dry and open landscape prevailed around Acigöl lake during the whole record. © 2019, 114Y723 Agricultural Marketing Service, AMS Agence Nationale de la Recherche, ANR Aligarh Muslim University, AMU Centre National de la Recherche Scientifique, CNRS, This research was funded by TUBITAK-CNRS bilateral cooperation with the grant number of 114Y723 during 2015–2017. The funds by 1) the ECCOREV Research Federation (OSU PYTHEAS, CNRS, AMU) for the project “ACIGOL”, 2) the Labex OT-MED (OSU PYTHEAS, CNRS, AMU) for the project BILAT, 3) and the projet EPICA (INSU 2018; Programme Tellus-INTERVIE) were received during 2017–2018. We thank the Wissenschaftliche Gesellschaft Freiburg im Breisgau for additional funding. We acknowledge the ALKIM Company for permitting us access and sampling to the core with special gratitude to Mr Hüseyin Ünlü (MSc) who was the director of ALKIM Company in Acigöl during the sampling and Mr. Mahmut Eser (MSc), the manager of the exploitation and Mr. Ünal Arık, present director of the company. The ASTER AMS national facility (CEREGE, Aix en Provence) is supported by the program INSU/CNRS INTERVIE, the ANR through the “Projets thématiques d'excellence” program for the “Equipements d'excellence” ASTER-CEREGE action and IRD. We thank S. Choy and L. Gacem for their help in the 9 Be measurements using the AAS of the LN2C (CEREGE). The data are archived at https://dx.doi.org/10.1594/PANGAEA.907658 . Appendix A, This research was funded by TUBITAK-CNRS bilateral cooperation with the grant number of 114Y723 during 2015?2017. The funds by 1) the ECCOREV Research Federation (OSU PYTHEAS, CNRS, AMU) for the project ?ACIGOL?, 2) the Labex OT-MED (OSU PYTHEAS, CNRS, AMU) for the project BILAT, 3) and the projet EPICA (INSU 2018; Programme Tellus-INTERVIE) were received during 2017?2018. We thank the Wissenschaftliche Gesellschaft Freiburg im Breisgau for additional funding. We acknowledge the ALKIM Company for permitting us access and sampling to the core with special gratitude to Mr H?seyin ?nl? (MSc) who was the director of ALKIM Company in Acig?l during the sampling and Mr. Mahmut Eser (MSc), the manager of the exploitation and Mr. ?nal Ar?k, present director of the company. The ASTER AMS national facility (CEREGE, Aix en Provence) is supported by the program INSU/CNRS INTERVIE, the ANR through the ?Projets th?matiques d'excellence? program for the ?Equipements d'excellence? ASTER-CEREGE action and IRD. We thank S. Choy and L. Gacem for their help in the 9Be measurements using the AAS of the LN2C (CEREGE). The data are archived at https://dx.doi.org/10.1594/PANGAEA.907658.

Published
2020
Full Text
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23. Le lac de barrage volcanique de la Loire à Rieutord (Ardèche): intérêt paléoenvironnemental, téphro-stratigraphique et archéologique, une chronologie en question

Author

Miras, Y., Nomade, S., Guillou, H., Miallier, D., Pilleyre, T., Jouannic, G., Moska, P., Tudika, K., Goslar, T., Raynal, J.P., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2020

24. When did this happen? Late volcanic activity in Eastern Velay and Vivarais (France) revisited

Author

Defive, E., Miallier, D., Pilleyre, T., Nomade, S., Guillou, H., Moska, P., Tudyka, K., Chapron, E., Miras, Y., Queffelec, A., Jouannic, G., Cortial, C., Goslar, T., Raynal, J.P., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2020

25. Pleistocene tephrostratigraphy and palaeoclimatology in the central Mediterranean region: ongoing research in Fucino Basin (central Apennines, Italy)

Author

Mannella, G., Giaccio, B., Leicher, N., Monaco, L., Nomade, S., Pereira, A., Regattieri, E., Wagner, B., Zanchetta, G., Gaet, a. M., Marra, F., Palladino, D. M., Scheidt, S., Sottili, G, Wonik, T., Wulf, S., Zeeden, C., Ariztegui, D., Cavinato, G. P., Dean, J. R., Florindo, F., Leng, M., Macrì, P., Niespolo, E. M., Renne, P., Rolf, C., Sadori, L., Thomas, C., and Tzedakis, P. C.

Published
2020

27. Acigol (SW Anatolia) during the Quaternary

Author

Demory, F, Rambeau, C, Lebatard, AE, Perrin, M, Blawal, S, Andrieu-Ponel, V, Rochette, P, Alcicek, H, Boulbes, N, Bourles, D, Helvaci, C, Petschick, R, Mayda, S, Moigne, AM, Nomade, S, Ponel, P, Vialet, A, and Alcicek, MC

Subjects
Lake sediment, Turkey, Paleomagnetic dating, Quaternary paleoclimatic, records, Paleoenvironmental reconstructions
Abstract

A 601 m long sedimentary sequence was drilled in Lake Acigol, located in the lakes region of SW Anatolia, near the Denizli travertine from which the oldest hominin of Turkey was unearthed. Among all dating methods applied to the sedimentary sequence, paleomagnetism, through the recognition of geomagnetic chrons, was the most successful and led to a quasi linear age model, with the 601 m long sedimentary record covering the last 2.3 Ma. An attempt to use the atmospherically deposited Be-10 as a dating method was not very successful but provides interesting clues on this new method. Long-term lake level changes are depicted through lithological variations, in particular the carbonates and evaporites abundance. This change could be influenced by both long term cooling during the last 2 Ma and tectonic activity, which may in particular be responsible for a maximum water depth at around 1.8 Ma. Despite active tectonic influence, the sedimentary facies description and the magnetic susceptibility record (cleaned from tephra intervals) show that climate fluctuations (i.e., glacial-interglacial alternations) are likely recorded in the sedimentary succession, with warm periods marked by enhanced carbonate precipitation and cold and dry periods characterized by more detrital input linked to reduced vegetation cover and consequently more erosion in the catchment area. Preliminary pollen data, used to interpret magnetic susceptibility fluctuations, show that an average dry and open landscape prevailed around Acigol lake during the whole record. C1 [Demory, Francois; Lebatard, Anne-Elisabeth; Perrin, Mireille; Rochette, Pierre; Bourles, Didier] Aix Marseille Univ, CNRS, IRD, INRA,Coll France,CEREGE, Aix En Provence, France. [Rambeau, Claire; Blawal, Syed] Albert Ludwigs Univ Freiburg, Sedimentol, Friedrichstr 39, D-79098 Freiburg, Germany. [Andrieu-Ponel, Valerie] Avignon Univ, Inst Mediterranien Biodiversite & Ecol Marine & C, AMU, CNRS,IRD,OSU Inst Pytheas,Technopole Environm Arb, BP 80, F-13545 Aix En Provence 4, France. [Alcicek, Hillya] Pamukkale Univ, Dept Geol, TR-20070 Denizli, Turkey. [Moigne, Anne-Marie; Vialet, Amelie] Univ Perpignan, Ctr Europeen Rech Prehist Tautavel, Museum Natl Hist Nat, UMR 7194,CNRS, Via Domitia,Ave Leon Jean Gregory, F-66720 Tautavel, France. [Helvaci, Cahit] Dokuz Eylul Univ, Dept Geol, TR-35160 Izmir, Turkey. [Petschick, Rainer] Goethe Univ Frankfurt, Inst Geowissensch, Altenhoferallee 1, D-60438 Frankfurt, Germany. [Mayda, Serdar] Ege Univ, Dept Biol, TR-35100 Izmir, Turkey. [Nomade, Sebastien] IPSL CEA CNRS UVSQ, Lab Sci Climat & Environm, Domaine CNRS Bat 12,Ave Terrasse, F-91198 Gif Sur Yvette, France. [Rambeau, Claire] Univ Strasbourg, CNRS, ENGEES, LIVE, 3 Rue Argonne, F-67083 Strasbourg, France.

Published
2020

30. Ecosystems changes in a context of hominins presence in the SW of Turkey. First results

Author

Andrieu-Ponel, Valérie, Rochette, P., Vialet, A., Rambeau, C, Alçiçek, H, Boulbes, N., Demory, F., Helvaci, C, Lebatard, Ae, Mayda, S, Michaud, H., Moigne, Am, Perrin, Mireille, Ponel, P., Nomade, S., Alçiçek, Cm, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Archéologie des Sociétés Méditerranéennes (ASM), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Avignon Université (AU), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD), Université Paul-Valéry - Montpellier 3 (UM3)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Paul-Valéry - Montpellier 3 (UM3), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paul-Valéry - Montpellier 3 (UM3)-Ministère de la Culture et de la Communication (MCC), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Université de Perpignan Via Domitia (UPVD), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Paul-Valéry - Montpellier 3 (UPVM)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), and 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)

Subjects
[SDE]Environmental Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

31. Construction of a Tephra-Based Multi-Archive Coherent Chronological Framework 1 for the Last2 Deglaciation in the Mediterranean Region

Author

Bazin, L., Lemieux-Dudon, B., Siani, G., Govin, A., Landais, A., Genty, D., Michel, E., Nomade, S., Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Climat et Magnétisme (CLIMAG), 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)-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), Centro Euro-Mediterranea sui Cambiamenti Climatici, Bologna BO, Italy, Géosciences Paris Saclay (GEOPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Glaces et Continents, Climats et Isotopes Stables (GLACCIOS), Paléocéanographie (PALEOCEAN), 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), 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)-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), Géosciences Paris Sud (GEOPS), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDE]Environmental Sciences
Abstract

International audience; Proxy records from different climate archives such as ice cores, speleothems or sediment cores are essential to define the sequence of events over to the last deglaciation. However, multi-archive comparison and compilation of data, necessary to assess the robustness of climate models, are rapidly limited by inconsistencies between archives' chronology. Here we present the development and validation of the Datice chronological integration tool for the construction of multi-archive coherent chronologies. This chronology building tool, first developed to date ice cores only, can now integrate deposition-like archives such as sediment cores and speleothems, independently or coherently. The robustness of this dating method resides in its capacity to build coherent chronologies for multiple archives with a proper calculation of chronological uncertainties. Using this tool, we were able to construct a coherent chronology for the last deglaciation in the Mediterranean region based on volcanic tephra layers correlation in terrestrial and marine sediment cores. We confirm the synchronicity, within chronological errors, of the sequence of events characterizing the last deglaciation between Greenland and the Mediterranean region, independently of any climatic alignment assumptions. Using this chronological framework, we however highlight some regional expression of this transition period in term of vegetation cover over the Mediterranean region.

Published
2019
Full Text
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32. Presence of cereals in lacustrine sediments from 2.3 Ma in the SW of Anatolia

Author

Andrieu-Ponel, V, Rochette, P., Demory, F., Alcicek, H, Boulbes, N., Bourles, D., Helvaci, C, Lebatard, AE, Mayda, S, Moigne, AM, Nomade, S., Perrin, M., Ponel, P., Rambeau, C, Vialet, A., Cihat Alçiçek, MC, Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA), Archéologie des Sociétés Méditerranéennes (ASM), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre National de la Recherche Scientifique (CNRS)-Ministère de la Culture (MC), Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Collège de France (CdF)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Université Paul-Valéry - Montpellier 3 (UM3)-Ministère de la Culture et de la Communication (MCC)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Université de Perpignan Via Domitia (UPVD), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), 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), and Centre National de la Recherche Scientifique (CNRS)-Université Paul-Valéry - Montpellier 3 (UM3)-Ministère de la Culture et de la Communication (MCC)

Subjects
[SDE]Environmental Sciences, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2019

33. Mediterranean winter rainfall in phase with African monsoons during the past 1.36 million years

Author

Wagner, B. Vogel, H. Francke, A. Friedrich, T. Donders, T. Lacey, J.H. Leng, M.J. Regattieri, E. Sadori, L. Wilke, T. Zanchetta, G. Albrecht, C. Bertini, A. Combourieu-Nebout, N. Cvetkoska, A. Giaccio, B. Grazhdani, A. Hauffe, T. Holtvoeth, J. Joannin, S. Jovanovska, E. Just, J. Kouli, K. Kousis, I. Koutsodendris, A. Krastel, S. Lagos, M. Leicher, N. Levkov, Z. Lindhorst, K. Masi, A. Melles, M. Mercuri, A.M. Nomade, S. Nowaczyk, N. Panagiotopoulos, K. Peyron, O. Reed, J.M. Sagnotti, L. Sinopoli, G. Stelbrink, B. Sulpizio, R. Timmermann, A. Tofilovska, S. Torri, P. Wagner-Cremer, F. Wonik, T. Zhang, X.

Abstract

Mediterranean climates are characterized by strong seasonal contrasts between dry summers and wet winters. Changes in winter rainfall are critical for regional socioeconomic development, but are difficult to simulate accurately1 and reconstruct on Quaternary timescales. This is partly because regional hydroclimate records that cover multiple glacial–interglacial cycles2,3 with different orbital geometries, global ice volume and atmospheric greenhouse gas concentrations are scarce. Moreover, the underlying mechanisms of change and their persistence remain unexplored. Here we show that, over the past 1.36 million years, wet winters in the northcentral Mediterranean tend to occur with high contrasts in local, seasonal insolation and a vigorous African summer monsoon. Our proxy time series from Lake Ohrid on the Balkan Peninsula, together with a 784,000-year transient climate model hindcast, suggest that increased sea surface temperatures amplify local cyclone development and refuel North Atlantic low-pressure systems that enter the Mediterranean during phases of low continental ice volume and high concentrations of atmospheric greenhouse gases. A comparison with modern reanalysis data shows that current drivers of the amount of rainfall in the Mediterranean share some similarities to those that drive the reconstructed increases in precipitation. Our data cover multiple insolation maxima and are therefore an important benchmark for testing climate model performance. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.

Published
2019

34. Frequency and dynamics of millenial-scale variability during Marine Isotope Stage 19: Insights from the Sulmona basin (central Italy)

Author

Regattieri E.[1, Giaccio B.[3], Mannella G.[1], Zanchetta G.[1], Nomade S.[4], Tognarelli A.[1], Perchiazzi N.[1], Vogel H.[5], Boschi C.[2], Drysdale R.[6, Wagner B.[8+, Gemelli M.[1], and Tzedakis P. [9]

Subjects
central Italy, interglacial variability, lacustrine succession, stable isotope geochemistry, MIS 19
Abstract

Among past interglacial periods, Marine Isotope Stage (MIS) 19 is particularly interesting because its orbital geometry is very similar to that of the present interglacial. Here we present a high-resolution (sub-centennial) multiproxy record covering the ca. 790-770 ka interval, i.e. the interglacial MIS 19c and the ensuing glacial inception of MIS 19b, from a lacustrine sediment sequence retrieved from the Sulmona Basin (central Italy). The record has an independent chronology based on radiometric dating of six volcanic ash layers, and the resulting age model has a mean associated uncertainty of ±2.6 kyr. Variations in sediment geochemistry and mineralogy are interpreted in terms of past hydrological and temperature changes. Several millennial and sub-millennial events of reduced precipitation are well expressed. Comparisons with continental and marine records from the mid-latitude and sub-polar North Atlantic suggest a broad spatial expression for the observed events. Events occurring within the interglacial are not clearly associated with changes in marine proxies in the Iberian Margin, although similarities with the record from the sub-polar North Atlantic can be recognized and tentatively linked to changes in local hydrography having a downstream effect amplified by changes in atmospheric circulation. During the glacial inception, changes in the Sulmona record are coherent with changes in North Atlantic records, with drier events likely associated with meltwater-induced intervals of AMOC weakening. An event at ca. 785.6 ka may also reflect oceanic changes caused by freshwater discharges from residual ice-sheets and an outburst flood, similar to the 8.2 ka event in the Holocene.

Published
2019

35. Pantasma: Evidence for a Pleistocene circa 14 km diameter impact crater in Nicaragua

Author

Rochette, P., Alac, R., Beck, P., Brocard, G., Cavosie, Aaron, Debaille, V., Devouard, B., Jourdan, F., Mougel, B., Moustard, F., Moynier, F., Nomade, S., Osinski, G., Cornec, J., Rochette, P., Alac, R., Beck, P., Brocard, G., Cavosie, Aaron, Debaille, V., Devouard, B., Jourdan, F., Mougel, B., Moustard, F., Moynier, F., Nomade, S., Osinski, G., and Cornec, J.

Abstract

The circa 14 km diameter Pantasma circular structure in Oligocene volcanic rocks in Nicaragua is here studied for the first time to understand its origin. Geomorphology, field mapping, and petrographic and geochemical investigations all are consistent with an impact origin for the Pantasma structure. Observations supporting an impact origin include outward‐dipping volcanic flows, the presence of former melt‐bearing polymict breccia, impact glass (with lechatelierite and low H2O, <300 ppm), and also a possible ejecta layer containing Paleozoic rocks which originated from hundreds of meters below the surface. Diagnostic evidence for impact is provided by detection in impact glass of the former presence of reidite in granular zircon as well as coesite, and extraterrestrial ε54Cr value in polymict breccia. Two 40Ar/39Ar plateau ages with a combined weighted mean age of 815 ± 11 ka (2 σ; P = 0.17) were obtained on impact glass. This age is consistent with geomorphological data and erosion modeling, which all suggest a rather young crater. Pantasma is only the fourth exposed crater >10 km found in the Americas south of N30 latitude, and provides further evidence that a significant number of impact craters may remain to be discovered in Central and South America.

Published
2019

36. Palaeoenvironmental and palaeohydrological variability of mountain areas in the central Mediterranean region: A 190 ka-long chronicle from the independently dated Fucino palaeolake record (central Italy)

Author

Mannella, G., Giaccio, B., Zanchetta, G., Regattieri, E., Niespolo, E. M., Pereira, A., Renne, P. R., Nomade, S., Leicher, N., Perchiazzi, N., Wagner, B., Mannella, G., Giaccio, B., Zanchetta, G., Regattieri, E., Niespolo, E. M., Pereira, A., Renne, P. R., Nomade, S., Leicher, N., Perchiazzi, N., and Wagner, B.

Abstract

Proxy records of past climate change spanning beyond the radiocarbon range commonly derive their chronologies from orbital tuning strategies, thus bounding our spatio-temporal reconstructions to a priori assumptions that can not be directly tested. Here we present a tephrochronologically constrained framework of past environmental and climatic changes in the central Mediterranean region during the last ca. 190 ka. Our research is based on a high-resolution, multi-proxy study of a sedimentary record (cores F1-F3) retrieved from the Fucino Basin lacustrine succession, central Italy, in 2015. We update the existing tephrostratigraphic framework of the F1-F3 record with the finding of the widespread Campanian lgnimbrite tephra marker layer and produce a robust and independent chronology based on new and published Ar-40/Ar-39 and C-14 dating of 17 tephra layers. Observed palaeoenvironmental changes are tracked in other lacustrine, marine and speleothem records across the Mediterranean and North Atlantic regions via tephrostratigraphic correlations and chronological matching providing a robust assessment of age uncertainties. Results show a complex interplay between local environmental changes and broadscale climatic processes highlighting a strong orbital forcing on glacial-interglacial changes. Along with these major changes we detect prominent millennial-scale variability. During times of intermediate global ice volumes, Mediterranean mountain ecosystems oscillated around an interglacial state suggesting that climatic shifts, although large, did not exceed the local environmental tolerance-resilience threshold. Conversely, during periods of large global ice volume, we observe subdued millennial-scale variability with ecosystems operating in a strictly ruled glacial environment. (C) 2019 Elsevier Ltd. All rights reserved.

Published
2019

37. Method IFG group et Project 16060 (INQUA HabCom)

Author

Moncel, M-H., Biddittu, I., Manzi, G., Saracino, B., Pereira, A., Nomade, S., Bahain, J-J., Voinchet, P., Falguères, C., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

38. The Palaeolithic record of Greece: A synthesis of the evidence and a research agenda for the future

Author

Tourloukis, Vangelis, Harvati, Katerina, Moncel, M-H., Pleurdeau, D., Pinhasi, R., Yeshurun, R., Agapishvili, T., Chevalier, T., LEBOURDONNEC, F-X., Poupeau, G., Nomade, S., Jennings, R., Higham, T., TUSHUBRAMISVILI, N., Lordkipanidze, D., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
010506 paleontology, geography.geographical_feature_category, 060102 archaeology, Pleistocene, [SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, Archaeological record, Subsistence agriculture, 06 humanities and the arts, 01 natural sciences, Archaeology, Geography, Lithic technology, Human evolution, Refugium (population biology), Peninsula, 0601 history and archaeology, Glacial period, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Earth-Surface Processes
Abstract

The Palaeolithic record of Greece remains highly fragmented and discontinuous in both space and time. Nevertheless, new surveys and excavations, along with the revisiting of known sites or old collections, and the conduction of lithic and faunal laboratory analyses, have altogether enriched the Greek Palaeolithic dataset with important new evidence and novel interpretations. The goal of this paper is threefold: 1) to critically review the most important aspects of the Greek Pleistocene archaeological record, from the Lower to the Upper Palaeolithic; 2) to provide a synthesis of current knowledge about the Palaeolithic of Greece and in the framework of broader discussions in human evolution research; and 3) to put in prospect the Greek record by addressing a research agenda for the future. The review of the evidence shows that Palaeolithic research in Greece has expanded its focus not only geographically but also temporally: it now includes investigations at previously under-studied areas, such as the insular settings of the Aegean and Ionian Seas, as well as formerly overlooked targets, such as Lower Palaeolithic open-air sites. The synthesis and discussion which follows offers a state-of-the-art perspective on how the primary Palaeolithic data can be assessed within local or regional geomorphic, paleoenvironmental and chronological contexts; here, our focus is on spatio-temporal discontinuities, trends in subsistence strategies and lithic technology, as well as potentially emerging biogeographical patterns. Finally, we highlight the complex topography and mosaic landscapes of the Greek peninsula in order to address two major themes for a future research agenda: the potential role of Greece as a glacial refugium, and how the Greek record could contribute to our knowledge of early hominin mobility patterns.

Published
2018
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39. A review of the geologic sections and the faunal assemblages of Aurelian Mammal Age of Latium (Italy) in the light of a new chronostratigraphic framework

Author

Marra, F., Nomade, S., Pereira, A., Petronio, C., Salari, L., Sottili, G., Bahain, J. J., Boschian, G., Di Stefano, G., Falguères, C., Florindo, F., Gaeta, M., Giaccio, B., Masotta, M., Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), 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), Paléocéanographie (PALEOCEAN), 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)-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), Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Scienze Archeologiche, University of Pisa - Università di Pisa, Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Bologna (INGV), Istituto Nazionale di Geofisica e Vulcanologia, 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 ) -Université Paris-Saclay-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire Lasers, Plasmas et Procédés photoniques ( LP3 ), Centre National de la Recherche Scientifique ( CNRS ) -Aix Marseille Université ( AMU ), Département de Préhistoire, Università di Pisa, Istituto Nazionale di Geofisica e Vulcanologia [Bologna] ( INGV ), 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), and 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)-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)

Subjects
[ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere, 010506 paleontology, Archeology, Middle Pleistocene, Pleistocene, Evolution, Context (language use), Biostratigraphy, 010502 geochemistry & geophysics, 01 natural sciences, Paleontology, Behavior and Systematics, Peninsula, Aggradational successions, [ SDU.ENVI ] Sciences of the Universe [physics]/Continental interfaces, environment, Chronostratigraphy, Tephrostratigraphy, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Ecology, Evolution, Behavior and Systematics, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, geography, Global and Planetary Change, geography.geographical_feature_category, Ecology, Archeology (arts and humanities), Aurelian Mammal Age, Geology, 15. Life on land, Latium, Mammal, Sedimentary rock
Abstract

The Aurelian Mammal Age for peninsular Italy was introduced on the basis of faunal assemblages mainly recovered at sites along the Via Aurelia west of Rome. These sites exposed a set of sedimentary deposits currently attributed to the Aurelia and to the Vitinia Formations correlated with MIS 9 and MIS 7, respectively. In the present paper we reconstruct the geologic-stratigraphic setting in the western sector of Rome within the wider context of glacio-eustatically controlled, geochronologically constrained aggradational successions defined for this region. We present a chronostratigraphic study based on dedicated field surveys, that, combined with five new 40Ar/39Ar ages and eighteen trace-element and EMP glass analyses of volcanic products, allow us to revise age and correlation with the Marine Isotopic Stages for 10 sites out of 12 previously attributed to the Aurelia Formation and the Torre in Pietra Faunal Unit. In particular, we demonstrate a MIS 13/MIS 11 age for several sections along the Via Aurelia between Malagrotta and Castel di Guido. Based on this new geochronological framework, the first occurrences of Canis lupus and Vulpes vulpes in Italy are antedated to MIS 11, within the Fontana Ranuccio Faunal Unit of the Galerian Mammal Age, consistent with the wider European context. This contribution is intended as the groundwork for a revision of the Middle Pleistocene Mammal Ages of the Italian peninsula, according to the improved chronostratigraphy of the geologic sections hosting the faunal assemblages.

Published
2018
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40. Workshop MIS 13-11: a major transformation in the European Lower Palaeolithic?Regional trends in lithic technology and human settlements during the Acheulean: the case study of the Ceprano basin

Author

Moncel, M-H., Biddittu, I., Manzi, G., Saracino, B., Pereira, A., Nomade, S., Bahain, J-J., Voinchet, P., Falguères, C., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

41. Earliest known hominin activity in the Philippines by 709 thousand years ago

Author

Ingicco, T. Van Den Bergh, G.D. Jago-On, C. Bahain, J.-J. Chacón, M.G. Amano, N. Forestier, H. King, C. Manalo, K. Nomade, S. Pereira, A. Reyes, M.C. Sémah, A.-M. Shao, Q. Voinchet, P. Falguères, C. Albers, P.C.H. Lising, M. Lyras, G. Yurnaldi, D. Rochette, P. Bautista, A. De Vos, J.

Abstract

Over 60 years ago, stone tools and remains of megafauna were discovered on the Southeast Asian islands of Flores, Sulawesi and Luzon, and a Middle Pleistocene colonization by Homo erectus was initially proposed to have occurred on these islands 1-4 . However, until the discovery of Homo floresiensis in 2003, claims of the presence of archaic hominins on Wallacean islands were hypothetical owing to the absence of in situ fossils and/or stone artefacts that were excavated from well-documented stratigraphic contexts, or because secure numerical dating methods of these sites were lacking. As a consequence, these claims were generally treated with scepticism 5 . Here we describe the results of recent excavations at Kalinga in the Cagayan Valley of northern Luzon in the Philippines that have yielded 57 stone tools associated with an almost-complete disarticulated skeleton of Rhinoceros philippinensis, which shows clear signs of butchery, together with other fossil fauna remains attributed to stegodon, Philippine brown deer, freshwater turtle and monitor lizard. All finds originate from a clay-rich bone bed that was dated to between 777 and 631 thousand years ago using electron-spin resonance methods that were applied to tooth enamel and fluvial quartz. This evidence pushes back the proven period of colonization 6 of the Philippines by hundreds of thousands of years, and furthermore suggests that early overseas dispersal in Island South East Asia by premodern hominins took place several times during the Early and Middle Pleistocene stages 1-4 . The Philippines therefore may have had a central role in southward movements into Wallacea, not only of Pleistocene megafauna 7, but also of archaic hominins. © 2018 Macmillan Publishers Ltd., part of Springer Nature.

Published
2018

42. Rapport de prospection inventaire : Causse et terrasses alluviales du volcanisme des Baumes

Author

Ivorra (Dir.), J., Guillou, H., Mathias, C., Nomade, S., Scao, V., Voinchet, P., Histoire naturelle de l'Homme préhistorique (HNHP), Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), and HNHP

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory
Published
2018

43. A review in the light of a new chronostratigraphic framework for the geologic sections and the faunal assemblages of Aurelian Mammal Age of Latium (Italy)

Author

Marra, F., Pereira, A., NOMADE, S.., Petronio, C., Salari, L., Sottili, G., Bahain, J.-J., Boschian, G., Di Stefano, G., FALGUÉRES, C., Florindo, F., Gaeta, M., Giaccio, B., Masotta, M., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

44. Integrated geochronology of Acheulian sites from the southern Latium (central Italy): Insights on human-environment interaction and the technological innovations during the MIS 11-MIS 10 period

Author

Pereira, A., Nomade, S., Moncel, M.H., Voinchet, P., Bahain, J.J., Biddittu, I., FALGUERES, C., Giaccio, B., Manzi, G., Parenti, F., Scardia, G., Scao, V., Sottili, G., Histoire naturelle de l'Homme préhistorique (HNHP), and Muséum national d'Histoire naturelle (MNHN)-Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SHS.ARCHEO]Humanities and Social Sciences/Archaeology and Prehistory, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2018

47. Palaeoenvironmental and palaeohydrological variability of mountain areas in the central Mediterranean region: A 190 ka-long chronicle from the independently dated Fucino palaeolake record (central Italy)

Author

Mannella, G., primary, Giaccio, B., additional, Zanchetta, G., additional, Regattieri, E., additional, Niespolo, E.M., additional, Pereira, A., additional, Renne, P.R., additional, Nomade, S., additional, Leicher, N., additional, Perchiazzi, N., additional, and Wagner, B., additional

Published
2019
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48. Pantasma: Evidence for a Pleistocene circa 14 km diameter impact crater in Nicaragua

Author

Rochette, P., primary, Alaç, R., additional, Beck, P., additional, Brocard, G., additional, Cavosie, A. J., additional, Debaille, V., additional, Devouard, B., additional, Jourdan, F., additional, Mougel, B., additional, Moustard, F., additional, Moynier, F., additional, Nomade, S., additional, Osinski, G. R., additional, Reynard, B., additional, and Cornec, J., additional

Published
2019
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50. Duration and dynamics of the best orbital analogue to the present interglacial

Author

Giaccio B.[1], Regattieri E.[1, 2, Zanchetta G.[1, Nomade S.[4], Renne P.R.[5, Sprain C.J.[5, Drysdale R.N.[7, Tzedakis P.C.[9], Messina P.[1], Scardia G.[1, 10], Sposato A.[1], Bassinot F.[4], National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), 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), Paléocéanographie (PALEOCEAN), 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)-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), Berkeley Geochronology Center (BGC), University of Melbourne, Department of Geography, University College of London [London] (UCL), Consiglio Nazionale delle Ricerche [Roma] (CNR), 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), and 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)-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)

Subjects
Geochemistry & Geophysics, [SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, Marine isotope stage, Holocene, Ar/Ar geochronology, glacial inception, Geology, Vegetation, MIS19, Holocene, Isotopes of oxygen, Paleontology, Past orbital analogues to the present interglacial, 13. Climate action, duration of the Holocene, Interglacial, Earth Sciences, Flandrian interglacial, Glacial period, MIS19, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, ComputingMilieux_MISCELLANEOUS, Chronology
Abstract

Past orbital analogues to the current interglacial, such as Marine Isotope Stage 19c (MIS 19c, ca. 800 ka), can provide reliable reference intervals for evaluating the timing and the duration of the Holocene and factors inherent in its climatic progression. Here we present the first high-resolution paleoclimatic record for MIS 19 anchored to a high-precision 40Ar/39Ar chronology, thus fully independent of any a priori assumptions on the orbital mechanisms underlying the climatic changes. It is based on the oxygen isotope compositions of Italian lake sediments showing orbital- to millennial-scale hydrological variability over the Mediterranean between 810 and 750 ka. Our record indicates that the MIS 19c interglacial lasted 10.8 ± 3.7 k.y., comparable to the time elapsed since the onset of the Holocene, and that the orbital configuration at the time of the following glacial inception was very similar to the present one. By analogy, the current interglacial should be close to its end. However, greenhouse gas concentrations at the time of the MIS 19 glacial inception were significantly lower than those of the late Holocene, suggesting that the current interglacial could have already been prolonged by the progressive increase of the greenhouse gases since 8-6 ka, possibly due to early anthropogenic disturbance of vegetation.

Published
2015
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