Reconstrucción paleoambiental del último ciclo glacial-interglacial en la Iberia continental: la secuencia del Cañizar de Villarquemado (Teruel)

P. González-Sampériz; E. García-Prieto; J. Aranbarri; Blas Lorenzo Valero-Garcés; A. Moreno; Graciela Gil-Romera; Miguel Sevilla-Callejo; L. Santos; M. Morellón; P. Mata; Antonia Andrade; José Sebastián Carrión

doi:10.18172/cig.1999

Authors

P. González-Sampériz Instituto Pirenaico de Ecologia
E. García-Prieto Instituto Pirenaico de Ecologia
J. Aranbarri Instituto Pirenaico de Ecologia
Blas Lorenzo Valero-Garcés Instituto Pirenaico de Ecologia
A. Moreno Instituto Pirenaico de Ecologia
Graciela Gil-Romera Instituto Pirenaico de Ecologia
Miguel Sevilla-Callejo Instituto Pirenaico de Ecologia
L. Santos Universidad de A Coruña
M. Morellón Das Wasserforschungs-Institut des ETH-Bereichs
P. Mata Instituto Geologico y Minero de Espana (IGME)
Antonia Andrade Universidad de Alcalá de Henares
José Sebastián Carrión Universidad de Murcia

DOI:

https://doi.org/10.18172/cig.1999

Keywords:

hydrological variability, continentality, resilience, aridity, Eemian, Holocene, last glacial cycle,

Abstract

El Cañizar de Villarquemado sequence (North-eastern Iberian Peninsula) stands as an exceptional palaeoenvironmental record for the last 130 000 years. The preliminary multidisciplinary study carried out so far include pollen and sedimentological analyses, comprising geochemical, X ray fluorescence (XRF), mineralogical, organic and inorganic content (TOC/TIC) analyses. The chronological model has been established combining AMS 14C on the first 20 m of sediment and OSL methods on the remaining 54 m to the bottom. The sedimentary sequence is essentially formed by alternating facies of peatbogs and wetlands with those of distal alluvial fan deposits and others of carbonate lake. The results currently obtained support relatively humid conditions at El Cañizar de Villarquemado during a likely MIS6-MIS5 period, as errors linked to the age model prevent us to guarantee precisely the period boundaries. Despite indications of humidity, the regional vegetation variations during the MIS6-MIS5 period, essentially represented by Juniperus, were constrained by the intense continentality of the area, resulting in unexpected pollen assemblages for an interglacial period as the Eemian. The most arid phase of the sequence is registered during the MIS3, as shown by the available sedimentological and palynological results, while the MIS2 presents greater local and regional variability as proved by the sedimentary facies and aquatics and the other pollen spectra, respectively. The Holocene presents an abrupt onset regarding palaeohydrology while terrestrial vegetation, dominated by pine instead than Juniperus as in the sequence’s bottom, show a resilient response as these are well adapted communities to extreme continentality. The later development of both, evergreen and marcescent Quercus, together with the presence of pine woodland, indicate very different climatic conditions between the MIS5 and MIS1 interglacial periods.

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