Papers by Thibault Roattino
HAL (Le Centre pour la Communication Scientifique Directe), Jan 20, 2023
Dessin à la pierre noire sur papier crème d'après une photo de Jan Erik Waider par Omméthée. 9 RE... more Dessin à la pierre noire sur papier crème d'après une photo de Jan Erik Waider par Omméthée. 9 REMERCIEMENTS Depuis un petit évènement banal rangé dans les souvenirs de mon enfance, la passion de comprendre le monde ne m'a pas quitté et ne me quittera probablement jamais. La science est ainsi naturellement devenue un but et m'a placé sur une route en direction d'une thèse. Conscient que cette route est plutôt un chemin éprouvant et glissant, ma famille était là pour m'encourager. Mes premières expériences au sein de différents laboratoires de recherche auprès de chercheurs ont été une première prise de conscience de ce qu'est le monde scientifique. Je pense ainsi à
HAL (Le Centre pour la Communication Scientifique Directe), 2018
Le Centre pour la Communication Scientifique Directe - HAL - Diderot, Nov 1, 2021
Geology, 2021
Paleoglacier reconstructions in the northern and southern forelands of the European Alps indicate... more Paleoglacier reconstructions in the northern and southern forelands of the European Alps indicate a synchronous Late Pleistocene glacial maximum during Marine Isotope Stage (MIS) 2, in phase with global ice volume records. However, strong controversy remains for the western foreland, where scarce and indirect dating as well as modeling studies suggest glacial maxima out of phase with the rest of the Alps. New luminescence dating brings the first direct Late Pleistocene glacial chronology for the western Alpine foreland and reveals two major glacier advances of similar maximum extent, at ca. 75–60 and ca. 40–30 ka, coinciding with MIS 4 and late MIS 3. We propose that asynchrony in glacial maxima between the western and the northern and southern Alpine forelands results from a progressive spatial reorganization of the atmospheric circulation over the North Atlantic in response to Northern Hemisphere ice-sheet fluctuations. While such a feedback mechanism has emerged from general circ...
Quaternary Research
The extent of glaciers in the western French Alps foreland during the last glacial maximum (LGM, ... more The extent of glaciers in the western French Alps foreland during the last glacial maximum (LGM, 26.5–19 ka) has not yet been determined, so understanding glacial paleogeography during the LGM remains an open question. This study focuses on the glacial chronology in the western French Alps piedmont using 10Be surface exposure ages on nine glacial boulders and 12 erratic boulders. Results indicate an LGM glacier advance between ca. 24 and 21 ka. During the late LGM, a smaller glacier readvance or stabilization phase occurred at ca. 19 ka, which was followed by a withdrawal phase between ca. 19 and 16.5 ka. Our outcomes show that the LGM extent in the western French Alps was similar or slightly less extensive than the pre-LGM ice extents during the last glacial. Such paleogeography has also been suggested in the western Italian Alps, which share the same accumulation zone with the western French Alps glaciers. The LGM dynamic of the western French Alps foreland glaciers highlighted by...
BSGF - Earth Sciences Bulletin
Previous studies in the foreland of the French Western Alps, based on the analysis of geomorpholo... more Previous studies in the foreland of the French Western Alps, based on the analysis of geomorphological criteria for the internal moraine complex, show several stages of retreat or stagnation of the Lyonnais ice lobe during marine isotopic stages 4 and 2. Based on chronological data of the literature, the age of the Würmian maximum extension of the Lyon ice lobe must have occurred during MIS 4 but this result is still debated. At the Last Glacial Maximum, in the western part of the Lyonnais ice lobe, glaciofluvial corridors were active during flash floods draining glacial meltwater. Today, these corridors are dead valleys and display a series of terraces. In this paper, we analyse the sedimentary geometries and dynamics of three glaciofluvial corridors (Moidieu, Septeme and Heyrieux) located at the front of the internal moraine complex of the Lyonnais ice lobe. Upstream, the Moidieu corridor splits into three branches called North Moidieu, Central Moidieu and South Moidieu. Glacioflu...
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Papers by Thibault Roattino