Evento 8.2k en la región cantábrica a partir de indicadores marinos (isótopos de oxígeno en gasterópodos) y terrestres (polen)

• A. García-Escárzaga ^[1] ; Sara Núñez de la Fuente ^[2] ; Igor Gutiérrez-Zugasti ^[2] ; D. Cuenca-Solana ^[4] ; J. Martín-Chivelet ^[3] ; José Antonio López Sáez ; M.R. González-Morales ^[2]
  1. [1] Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Leioa, España

     
  2. [2] Universidad de Cantabria

     Universidad de Cantabria

     Santander, España

     
  3. [3] Universidad Complutense de Madrid

     Universidad Complutense de Madrid

     Madrid, España

     
  4. [4] Université Rennes

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• Localización: XV Reunión Nacional de Cuaternario Bizkaia Aretoa: Bilbao, 1-5 julio 2019. Libro de resúmenes, 2019, ISBN 978-84-17713-16-4, págs. 156-159
• Idioma: español
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• Resumen

  • The most prominent of the short climatic events occurred on the Early Holocene is the 8.2k event. However, the information about this abrupt climate change in northern Iberia is still scarce. This paper aims to improve our knowledge of climate variability in this area during the Early Holocene. To achieve this, δ18O values were obtained from subfossil shells of Phorcus lineatus (da Costa, 1778) recovered from the Mesolithic site of El Mazo (Asturias). Data from pollen and non-pollen palynomorphs obtained from the same site contributed to add details on this study. Results showed that shells from units dated to around 8.2 ka cal BP recorded slightly cooler summers than the rest of the sequence, suggesting thus that the 8.2k event had a certain impacton the oceanographic conditions in this area. The main palynological results showed that the vegetation is clearly affected by this abrupt climatic change, showing a decline in arboreal pollen because of colder and arid climate conditions