Multidisciplinary study of the quaternary deposits of the Vila Nova de Gaia, NW Portugal, and its climate significance

  1. Helena Ribeiro 1
  2. A. Pinto de Jesus 1
  3. J. Sanjurjo 2
  4. I. Abreu 1
  5. J. R. Vidal Romani 2
  6. F. Noronha 1
  1. 1 Universidade Do Porto
    info

    Universidade Do Porto

    Oporto, Portugal

    ROR https://ror.org/043pwc612

  2. 2 Universidade da Coruña
    info

    Universidade da Coruña

    La Coruña, España

    ROR https://ror.org/01qckj285

Revista:
Journal of iberian geology: an international publication of earth sciences

ISSN: 1886-7995,  1698-6180

Año de publicación: 2019

Volumen: 45

Número: 4

Páginas: 553-563

Tipo: Artículo

DOI: 10.1007/S41513-019-00109-9 DIALNET GOOGLE SCHOLAR

Otras publicaciones en: Journal of iberian geology: an international publication of earth sciences

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Resumen

Palynological, geochronological, and sedimentological analyses were conducted on samples from diferent depositional units of well-preserved marine, fuvial and palustrine sedimentary deposits from Vila Nova de Gaia located at the northwestern Portuguese coast. The studied deposits occur on two terraces: Terrace A—Lavadores (18 m to 33 m) and Terrace B—Canidelo (50 m). Chronological and sedimentological features allowed to date the deposits to the Upper Pleistocene until the last glacial period, being observed an evolution from a depositional setting in a marine intertidal zone, passing to a fuvial environment and ending in a palustrine/lagunar environment with possible periglacial infuence. Pollen assemblages collected in the fuvial sedimentary horizons also suggested changes in the environmental conditions. A pollen content with good representation of arboreal species (Quercus, Pinus, Castanea, Fraxinus, Salix, Betula and Corylus), changed to a vegetation environment dominated by non-arboreal species, such as Poaceae, Plantago and Asteraceae. The top horizons, corresponding to a palustrine/lagunar environment, presented a pollen profle completely dominated by non-arboreal species, with minimal tree representation (Prunus, Quercus, Pinus and Castanea) which, combined with sedimentological characteristics may point to a more dry and cold climate than nowadays.

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