Caracterización sísmica y sedimentológica de los depósitos transgresivos postglaciares de la plataforma continental del Golfo de Cádiz

  1. A. Carrión-Torrente 1
  2. F.J. Lobo 1
  3. A. Puga-Bernabéu 2
  4. I. Mendes 3
  5. M. García 4
  6. S. Lebreiro 5
  7. M. Luján 6
  8. L. Antón 5
  9. M.I. Reguera 5
  10. J. Cerrillo-Escoriza 1
  1. 1 Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada
  2. 2 Universidad de Granada
    info

    Universidad de Granada

    Granada, España

    ROR https://ror.org/04njjy449

  3. 3 Universidade do Algarve
    info

    Universidade do Algarve

    Faro, Portugal

    ROR https://ror.org/014g34x36

  4. 4 Instituto Español de Oceanografía
    info

    Instituto Español de Oceanografía

    Madrid, España

    ROR https://ror.org/00f3x4340

  5. 5 Instituto Geológico y Minero de España
    info

    Instituto Geológico y Minero de España

    Madrid, España

    ROR https://ror.org/04cadha73

  6. 6 Universidad de Cádiz
    info

    Universidad de Cádiz

    Cádiz, España

    ROR https://ror.org/04mxxkb11

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Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Año de publicación: 2021

Título del ejemplar: X Congreso Geológico de España

Número: 18

Páginas: 738

Tipo: Artículo

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Otras publicaciones en: Geotemas (Madrid)

Resumen

Alternating periods with different rates of sea-level rise during the last deglaciation provided ideal conditions to study the sedimentary response to abrupt shelf flooding. In this work, the analysis and interpretation of high-resolution seismic pro- files in the northern sector of the Gulf of Cadiz shelf, off the Guadiana River, combined with the sedimentological analysis of sediment cores, revealed the existence of four depositional bodies in a retrogradational stacking pattern (U2 to U5). The internal structure of each individual deposit shows two components. The lower one is generated in a coastal environment, formed by shallow-water prodeltas and occasional development of distributary channels. The upper component is generated by reworking of the original clinoforms under a marine regime. The number of deposits and their internal structure suggest that their genesis is associated with conditions of high sedimentary inputs and a relatively energetic oceanographic regime. Radiocarbon datings indicate the formation of these transgressive deposits within the 14-8 ka interval, mostly in relation to phases of enhanced sea-level rise driven by meltwater pulses.

Fuente de los datos: Dialnet