Quaternary glaciations in the eastern pyrenees (ARIÈGE): Historiographical approach, New paleogeographical and chronological data. Delmas, M., Calvet, M., Gunnell, Y., Braucher, R., & Bourlès, D. Quaternaire, 23(1):61--85, 2012. ![Quaternary glaciations in the eastern pyrenees (ARIÈGE): Historiographical approach, New paleogeographical and chronological data [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper abstract bibtex This study examines the evidence for Pleistocene glacier extent in the north-central Pyrenees from three perspectives: the history of scientific ideas, the evolution of geomorphological research methods, and recent progress in the reconstruction of Pyre-nean palaeoenvironments. From Albrecht Penck (1883) to Francois Taillefer (1985) we first provide an overview of one century of field investigations into the glacial palaeogeography of the Ariege catchment. We show how the initial adoption of Penck and Bruckner's Alpine model involving multiple glaciations was soon replaced by a rival monoglacialist theory, which has cast a lasting shadow over attempts at producing an objective chronology of Pleistocene glaciations. Our focus on research methods emphasizes the great importance of geomorphological mapping. This is because the synoptic examination of landform assemblages assists in establishing a relative chronology of ice movement across each part of the landscape, and dictates the sampling strategy required for direct radiometric dating of landform sequences. Based on these methods it has been possible to reconstruct past Pyrenean environments in more detail than previously achieved. Six stades of Wiirmian and earlier glaciations have now been established based on a population of 37 in si/u-produced 10 Be nuclide samples collected from the extent ice-marginal landforms generated by the Ariege outlet glacier and its tributaries. Partly based on sharp contrasts in glacial sediment weathering intensities, results reveal that a ante-MIS 5e valley glacier extended beyond the outermost Wiirmian terminal moraine. The age of the Wiirmian maximum ice extent is shown to correlate with Marine Isotope Stage 4 (MIS 4), and the ice front underwent fluctuations of several kilometres during MIS 3. The Global LGM is recorded as the last substantial glacier readvance although the ice front did not quite reach its MIS 4 maximum. Rapid meltback ensued, with glacier fronts during the Oldest Dryas occurring in the upper valleys of both Ariege River and Sue, a tributary of the Vicdessos River.
@article{delmas_quaternary_2012,
title = {Quaternary glaciations in the eastern pyrenees ({ARIÈGE}): {Historiographical} approach, {New} paleogeographical and chronological data},
volume = {23},
shorttitle = {Les glaciations quaternaires dans les pyrénées ariégeoises: {Approche} historiographique, {Données} paléogéographiques et chronologiques nouvelles},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84859589182&partnerID=40&md5=169c8ce1b8368d990a9673b5267740c3},
abstract = {This study examines the evidence for Pleistocene glacier extent in the north-central Pyrenees from three perspectives: the history of scientific ideas, the evolution of geomorphological research methods, and recent progress in the reconstruction of Pyre-nean palaeoenvironments. From Albrecht Penck (1883) to Francois Taillefer (1985) we first provide an overview of one century of field investigations into the glacial palaeogeography of the Ariege catchment. We show how the initial adoption of Penck and Bruckner's Alpine model involving multiple glaciations was soon replaced by a rival monoglacialist theory, which has cast a lasting shadow over attempts at producing an objective chronology of Pleistocene glaciations. Our focus on research methods emphasizes the great importance of geomorphological mapping. This is because the synoptic examination of landform assemblages assists in establishing a relative chronology of ice movement across each part of the landscape, and dictates the sampling strategy required for direct radiometric dating of landform sequences. Based on these methods it has been possible to reconstruct past Pyrenean environments in more detail than previously achieved. Six stades of Wiirmian and earlier glaciations have now been established based on a population of 37 in si/u-produced 10 Be nuclide samples collected from the extent ice-marginal landforms generated by the Ariege outlet glacier and its tributaries. Partly based on sharp contrasts in glacial sediment weathering intensities, results reveal that a ante-MIS 5e valley glacier extended beyond the outermost Wiirmian terminal moraine. The age of the Wiirmian maximum ice extent is shown to correlate with Marine Isotope Stage 4 (MIS 4), and the ice front underwent fluctuations of several kilometres during MIS 3. The Global LGM is recorded as the last substantial glacier readvance although the ice front did not quite reach its MIS 4 maximum. Rapid meltback ensued, with glacier fronts during the Oldest Dryas occurring in the upper valleys of both Ariege River and Sue, a tributary of the Vicdessos River.},
number = {1},
journal = {Quaternaire},
author = {Delmas, M. and Calvet, M. and Gunnell, Y. and Braucher, R. and Bourlès, D.},
year = {2012},
keywords = {10 Be dating, Chronostratigraphy, Global LGM, Lateglacial, Morphostratigraphy, Pyrenees, Quaternary, Wiirmian maximum ice extent, chronology, geomorphology, glaciation, ice margin, paleoenvironment, paleogeography, pyrene, radiometric method, tributary},
pages = {61--85}
}
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