Resumen de Reconstrucción paleoambiental de los últimos 35000 años en el Noroeste de la Península Ibérica: la Laguna de Villaseca (León)

G. Jalut, Jean-Marc Belet, Alipio J. García de Celis, José María Redondo Vega, L. Bonnet, Blas Lorenzo Valero Garcés, A. Moreno, L. Villar, Michel Fontugne, J. Dedoubat, Penélope González Sampériz, Luisa Santos-Fidalgo, Juan Ramón Vidal Romaní

• The déglaciation history o f the Bradas de Robles, Lumajo and Sosas valleys (Sil River headwaters,León province, N W Spain) was reconstructed on the basis of detailed geomorphological studies ofglacier deposits and sedimentological and palynological analyses of the Villaseca Lake sedimentsequence. The basal 14C date o f the glacial lake deposit sequence indicates that, the maximumextent of the glaciers during the last glaciation was before 35,000 years B.P. and predated the maximum advances o f the Scandinavian Ice Sheet and some Alpine glaciers. The early déglaciation alsooccurred in the Cantabrian mountains and in the Pyrenees and it suggests different regionalresponses to climatic forcing in southern Europe. Sedimentological and palinological proxies fromthe Villaseca record show a high-frequency ciclicity during the Lateglacial that could correlate withthe known millenial-scale variability described in the north Atlantic marine records.