New radiometric and geomorphologic evidences of a last glacial maximum older than 18 ka in SW European mountains: the example of Redes Natural Park (Cantabrian Mountains,NW Spain) |
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| Affiliation: | 1. Department of Geography, University of Barcelona, Spain;2. Department of Geography, University of Oviedo, Spain;3. Department of Modern History, University of Barcelona, Spain;4. Museo Nacional de Ciencias Naturales (MNCN-CSIC), Madrid, Spain;5. Department of Geography and Spatial Planning, University of Zaragoza, Spain;6. Instituto Pirenaico de Ecología (IPE-CSIC), Campus de Aula Dei, Zaragoza, Spain;7. Institute of Earth Sciences, Jaume Almera (ICTJA-CSIC), Barcelona, Spain;8. Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal;9. Group Earth System Science, Universidade de Santiago de Compostela, Spain;10. Laboratory of Physical & Forensic Anthropology, Universidad de Granada, Spain;11. Institute of History – CSIC, Spain;12. Meteorological Service of Catalonia, Spain;13. Department of Geography, University of Valladolid, Spain |
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| Abstract: | The first numerical age determinations from radiocarbon dating establish the chronology of glacial events in Redes Natural Park (Cantabrian Mountain, NW Spain). A core drilled in an ice-dammed deposit provided a minimum age of 28 990 ± 230 years BP for the maximum glacial expansion (phase I). Another core from a cirque bottom-fill provided organic sediment with 20 640 ± 300 years BP, a minimum age for the first glacial retreat (phase II). Radiometric dating of proglacial deposits interpreted as synchronous with the last glacial maximum phase in neighbouring Comella basin (Picos de Europa), yield ages of 40 480 ± 820 years BP. The chronological data presented in this work are consistent with the model of glacier evolution established in the Pyrénées, with a glacial maximum phase for the last glacial period older than 18 ka. |
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