Enregistrements malacologiques à haute résolution dans les lœss et les gleys de toundra du pléniglaciaire weichselien supérieur : premiers exemples du nord de la France

Moine, Olivier Le; Antoine, Pierre; Deschodt, Laurent; Sellier-Ségard, Nathalie

doi:10.4000/quaternaire.6042

Cited by 26 publications

(16 citation statements)

References 25 publications

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“…; Sellier & Coutard ; Feray ; Moine et al . ). Similar features have also been observed from alluvial terraces and slope formations in Brittany (Van Vliet‐Lanoë et al .…”

Section: Main Characteristics Of Observed Featuresmentioning

confidence: 97%

Distribution and chronology of Pleistocene permafrost features in France: Database and first results

Bertrán

Andrieux

Antoine

et al. 2013

Boreas

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International audienceNumerous periglacial features (polygons, nets, soil stripes, ice-wedge pseudomorphs and sand-wedge casts, involutions) have been recorded in France by examining bibliographical sources and aerial photographs. These data show that a large part of France was affected by permafrost during the Pleistocene and only the southern Aquitaine Basin and Languedoc seem to have been beyond its maximum extent. The first OSL ages obtained from the aeolian infill of wedge structures indicate that at least two phases of thermal contraction cracking occurred in southwestern France between ∼25 and 36 ka. Chronostratigraphical data from loess in northern France indicate that these episodes correspond to the formation of ice-wedge networks associated with tundra gleys. In the latter region, two additional permafrost episodes probably occurred during the Last Glacial, the older one corresponding to the end of Marine Isotope Stage (MIS) 4 around 60 ka and the more recent one to MIS 2 around 19-16 ka. Although stratigraphical data indicate that these episodes were relatively short (about one millennium), relict permafrost may have existed for longer periods in northern France

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“…; Sellier & Coutard ; Feray ; Moine et al . ). Similar features have also been observed from alluvial terraces and slope formations in Brittany (Van Vliet‐Lanoë et al .…”

Section: Main Characteristics Of Observed Featuresmentioning

confidence: 97%

Distribution and chronology of Pleistocene permafrost features in France: Database and first results

Bertrán

Andrieux

Antoine

et al. 2013

Boreas

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“…This pattern of the ECG concentration suggests that boreal and arctic brown soils result from accretionary soil processes (upbuilding soils ;Nikiforoff 1949;Almond & Tonkin 1999) associated with a low rate of aeolian sedimentation, which is contemporaneous with weathering processes. This hypothesis is also confirmed by the distribution of molluscs throughout the Middle Pleniglacial palaeosols at Nussloch (Moine et al , 2011. Indeed, most of the mollusc species found in Nussloch are surface species and do not bury more than 5 cm in depth to hibernate .…”

Section: Comparison Between Ecg Concentration Pedostratigraphy and Gmentioning

confidence: 57%

“…This hypothesis is also confirmed by the distribution of molluscs throughout the Middle Pleniglacial palaeosols at Nussloch (Moine et al . , ). Indeed, most of the mollusc species found in Nussloch are surface species and do not bury more than 5 cm in depth to hibernate (Moine et al .…”

Section: Discussionmentioning

confidence: 99%

High‐resolution quantification of earthworm calcite granules from western European loess sequences reveals stadial–interstadial climatic variability during the Last Glacial

Prud'homme

Moine

Mathieu

et al. 2018

Boreas

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High concentrations of calcite fossil granules produced by earthworms (ECG) have been identified in most of the stratigraphical units along the loess‐palaeosol reference sequence of Nussloch (Germany). They are particularly abundant in interstadial brown soils and in tundra gley horizons, the latter reflecting short‐term phases of aggradation then degradation of permafrost. These granules are characterized by a radial crystalline structure produced in the earthworms by specific bio‐mineralization processes. In our study, we used this biological indicator combined with 14C and OSL dating, and sedimentological parameters to characterize millennial‐time scale climatic variations recorded in loess sequences. The approach is based on high‐resolution counts of ECG throughout a 17‐m‐thick loess sequence (332 samples). Strong increases in granule and mollusc concentrations suggest warmer climate conditions during palaeosol formation phases, associated with increasing biodiversity, biological activity and vegetation cover. Decreased granule concentrations occur within primary loess deposits, indicating a strong correlation with palaeoenvironmental conditions and demonstrating the reliability of ECG concentration variations as a new palaeoenvironmental proxy. Finally, this pattern is also recorded in loess sequences located about 600 km westward in northern France demonstrating the large‐scale validity of this new palaeoclimatic proxy.

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“…Compared with other mollusc records from loess sequences (Moine, 2014), abundance maximums in Havrincourt and Villers-Carbonnel are typical of the BBSs and of the upper part of thick and cryoturbated TGs. Those maximums are correlated with high proportions of juveniles, suggesting higher temperatures and a lengthening of the warm season (Moine et al, 2008(Moine et al, , 2011Antoine et al, 2013). Moreover, the good correlation between strong increases in ECG abundance, mollusc abundance and organic carbon concentrations in BBS and TG layers at Havrincourt and Villers-Carbonnel suggests a clear development of the local vegetation during the formation of these horizons.…”

Section: Discussionmentioning

confidence: 81%

“…Between approximately 35 and 20 ka, these sequences exhibit cyclical alternations of loess units and tundra gley horizons reflecting the response of periglacial environments to Dansgaard-Oeschger cycles (Rousseau et al, 2002(Rousseau et al, , 2011Antoine et al, 2009b). However, because pollen is not preserved in such sediments, the impact of these climate changes on local palaeoenvironments has so far been investigated only through the analysis of terrestrial mollusc assemblages (Remy, 1969;Schiermeyer, 2002;Moine et al, 2008Moine et al, , 2011. These studies revealed that the development of tundra gley horizons is associated with humidity increases and their degradation with temperature increases.…”

Section: Introductionmentioning

confidence: 99%

Earthworm calcite granules: a new tracker of millennial‐timescale environmental changes in Last Glacial loess deposits

Prud'homme

Antoine

Moine

et al. 2015

J Quaternary Science

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Enregistrements malacologiques à haute résolution dans les lœss et les gleys de toundra du pléniglaciaire weichselien supérieur : premiers exemples du nord de la France

Cited by 26 publications

References 25 publications

Distribution and chronology of Pleistocene permafrost features in France: Database and first results

Distribution and chronology of Pleistocene permafrost features in France: Database and first results

High‐resolution quantification of earthworm calcite granules from western European loess sequences reveals stadial–interstadial climatic variability during the Last Glacial

Earthworm calcite granules: a new tracker of millennial‐timescale environmental changes in Last Glacial loess deposits

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