Evolución ambiental holocena del estuario del Oka (reserva de la biosfera de Urdaibai, sureste del golfo de Bizkaia)respuesta al ascenso postglacial del nivel del mar

  1. Ane García-Artola 1
  2. Alejandro Cearreta 1
  3. Manuel Monge-Ganuzas
  4. B.P. Horton 2
  5. D. Nikitina 3
  1. 1 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

  2. 2 Nanyang Technological University, Singapore
  3. 3 West Chester University
    info

    West Chester University

    West Chester, Estados Unidos

    ROR https://ror.org/0053n5071

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Libro:
XV Reunión Nacional de Cuaternario Bizkaia Aretoa: Bilbao, 1-5 julio 2019. Libro de resúmenes

Editorial: Universidad del País Vasco = Euskal Herriko Unibertsitatea

ISBN: 978-84-17713-16-4

Año de publicación: 2019

Páginas: 71-74

Congreso: Reunión Nacional de Cuaternario (15. 2019. Bilbao)

Tipo: Aportación congreso

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Resumen

Fluvial paleovalleys provide critical data to study the temporal superposition of depositional environments during the Holocene postglacial sea-level rise. We study eight boreholes that reached bedrock and a short replicate extracted from the Oka Estuary (Urdaibai Biosphere Reserve, southeastern Bay of Biscay). Benthic foraminifera and grain size allowed for paleoenvironmental reconstructions and radiocarbon dates put the sediment into a temporal framework.The sedimentary infill of the estuary shows a progressive shallowing of the estuary as rates of sea-level rise decreased during the Holocene: fluvial gravels on the bottom, marine and brackish intertidal sediments in the middle, and salt-marsh sediments on top. The sequence is topped by a few meters of anthropogenic deposits

Fuente de los datos: Dialnet