Geomorphology of the Eastern Algarve proximal continental margin (South Portugal, SW Iberia Peninsula): sedimentary dynamics and its relationship with the last asymmetrical eustatic cycle

  • C. Roque
  • F. J. Hernández-Molina
  • F. Lobo
  • L. Somoza
  • V. Díaz-del-Rio
  • J. T. Vázquez
  • J. Dias

Abstract

Key-words: geomorphology, proximal continental margin, Late Pleistocene-Holocene, sea-level changes, Eastern Algarve.


Four morphological categories were recognised using high resolution seismic data on the Eastern Algarve proximal continental margin (South Portugal): depositional (littoral prism, prodelta, shelf sedimentary cover and slope accumulation), erosive (palaeo-channels, submarine terraces, transgressive surface and erosive surface over the slope), gravity (slides and slumps), and neotectonic (submarine scarp). These morphologies were generated during the Late Pleistocene-Holocene, as a result of the interplay between several factors, namely, the rate of sedimentary supply, the oceanographic conditions, the neotectonic activity and the sea-level changes from the last lowstand to the present highstand related with the last eustatic cycle. The Late Quaternary sea-level changes have been the main control and modelling factor for the development of most depositional and erosional morphologies.

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Published
2011-01-28
How to Cite
ROQUE, C. et al. Geomorphology of the Eastern Algarve proximal continental margin (South Portugal, SW Iberia Peninsula): sedimentary dynamics and its relationship with the last asymmetrical eustatic cycle. Ciências da Terra / Earth Sciences Journal, [S.l.], v. 17, jan. 2011. ISSN 2183-4431. Available at: <http://cienciasdaterra.novaidfct.pt/index.php/ct-esj/article/view/263>. Date accessed: 13 june 2021.
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Articles