Rapid age assessment of glacial landforms in the Pyrenees using Schmidt hammer exposure dating (SHED)
| Autor: | Marc Calvet, Philip D. Hughes, Magali Delmas, Raimon Pallàs, Jonny Huck, Andrew G. Stimson, Matt D. Tomkins, Jason M. Dortch |
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| Přispěvatelé: | University of Manchester [Manchester], University of Kentucky, Université de Perpignan Via Domitia (UPVD), Departament de Geodinamica i Geofısica, Facultat de Geologia, Universitat de Barcelona (UB) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
010504 meteorology & atmospheric sciences Oldest Dryas Terrestrial cosmogenic nuclide dating Glacial landform Datation des nucléides cosmogènes terrestres [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Dernier maximum glacial 01 natural sciences Arts and Humanities (miscellaneous) Younger Dryas [SDU.STU.GM]Sciences of the Universe [physics]/Earth Sciences/Geomorphology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Holocene 0105 earth and related environmental sciences Earth-Surface Processes Pyrénées geography geography.geographical_feature_category Chronologie de l'Âge de Glace Last glacial maximum Glacier Last Glacial Maximum Geomorphology 15. Life on land Schmidt hammer exposure dating Schmidt hammer 13. Climate action Glacier chronology [SDU]Sciences of the Universe [physics] [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Marteau de Schmidt General Earth and Planetary Sciences Physical geography Ice sheet Géomorphologie Geology |
| Zdroj: | Quaternary Research Quaternary Research, Elsevier, 2018, 90 (1), pp.26-37. ⟨10.1017/qua.2018.12⟩ Tomkins, M, Dortch, J, Hughes, P, Huck, J, Stimson, A, Delmas, M, Calvet, M & Pallas, R 2018, ' Rapid age assessment of glacial landforms in the Pyrenees using Schmidt Hammer exposure dating (SHED) ', Quaternary Research, vol. 90, no. 1, pp. 26-37 . https://doi.org/10.1017/qua.2018.12 |
| ISSN: | 0033-5894 1096-0287 |
| DOI: | 10.1017/qua.2018.12⟩ |
| Popis: | Schmidt hammer (SH) sampling of 54 10Be-dated granite surfaces from the Pyrenees reveals a clear relationship between exposure and weathering through time (n=52, R2=0.96, P10Be-SH calibration curve, 100 surfaces were sampled from five ice-front positions in the Têt catchment, eastern Pyrenees, with results verified against independent 10Be and 14C ages. Gaussian modelling differentiates Holocene (9.4±0.6 ka), Younger Dryas (12.6±0.9 ka), Oldest Dryas (16.1±0.5 ka), last glacial maximum (LGM; 24.8±0.9 ka) and Würmian maximum ice extent stages (MIE; 40.9±1.1 ka). These data confirm comparable glacier lengths during the LGM and MIE (~300 m difference), in contrast to evidence from the western Pyrenees (≥15 km), reflecting the relative influence of Atlantic and Mediterranean climates. Moreover, Pyrenean glaciers advanced significantly during the LGM, with a local maximum at ~25 ka, driven by growth of the Laurentide Ice Sheet, southward advection of the polar front, and a solar radiation minimum in the Northern Hemisphere. This calibration curve is available online (http://shed.earth) to enable wider application of this method throughout the Pyrenees. |
| Databáze: | OpenAIRE |
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