Le dernier interglaciaire et le cycle climatique würmien dans le Sud-Ouest et le Massif Central Français

Abstract

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The four seasons of reindeer: Non-migrating reindeer in the Dordogne region (France) between 30 and 18 k? Data from the Middle and Upper Magdalenian at La Madeleine and methods of seasonality determination

“…We should note that the existence of diverse environments, suggested by overly dispersed studies (e.g. Campy et al, 1994;Laville et al, 1983Laville et al, , 1986Antoine et al, 2016;Moine, 2014), had little effect on reindeer populations between 30 and 12 ka in the Mammoth Steppe biome. In effect, even if reindeer were sometimes less often hunted than other large herbivores (e.g.…”

Last glacial fluctuations in the southwestern Massif Central, Aubrac (France): First direct chronology from cosmogenic 10Be and 26Al exposure dating

“…A cold culminationis recorded and primarily associated to the beginning of the MIS 2 (Laville et al, 1986), and then correlated to approximately 25 ka (Van Vliet-Lanoë et al, 1991). Dating of the infilling of thermal contraction cracks in discontinuous permafrost in the Aquitaine basin resulted in ages between 27 and 25.5 ka BP and suggests a climatic downturn at the beginning of MIS 2 (Bertran et al, 2014).…”

“…In the western Massif Central, a successive and gradual climatic deterioration with increasingly colder temperatures started with the onset of MIS 2 (Laville et al, 1986) at ~29 ka (Lisiecki and Raymo, 2005).…”

“…Previous reconstruction of the late Pleistocene glaciation of the Massif Central was based on morphostratigraphic evidence and relative correlations with local and regional paleoenvironmental proxies (Goër de Hervé, 1972;Poizat and Rousset, 1975;Veyret, 1978;Valadas, 1984;Etlicher, 1986;Ancrenaz et al, 2020). Indirect paleoenvironmental proxies, such as pollen sequences (Etlicher et al, 1987;Reille and Beaulieu, 1988;Ponel and Russell Coope, 1990;Vergne, 1991;Gandouin et al, 2016;Ponel et al, 2016) or sedimentological stratigraphies (Valadas, 1984;Laville et al, 1986;Van Vliet-Lanoë et al, 1991), are available and provide indirect chronological boundaries for glacier fluctuations. However, resulting chronologies differ for the various glaciated areas of the Massif Central (cf.…”

“…Hence, without direct dating of glacial deposits, important uncertainties and inconsistencies remain, especially concerning the timing of both the LLGM and full deglaciation. During the last glacial cycle, two periods, locally named the Early and Late Pleniglacial (sensu Laville et al, 1986;Van Vliet-Lanoë et al, 1991), that correlate with Marine Isotopic Stage 4 (MIS 4; 71−57 ka; Lisiecki and Raymo, 2005) and MIS 2 (29−11.7 ka;Lisiecki and Raymo, 2005), respectively, were recognised as two major phases of glacier growth in the Massif Central (Etlicher and Goër de Hervé, 1988;Defive et al, 2019). In general, in the literature and according to the considered glaciated area, the LLGM is attributed to one of these two periods.…”