Marine terrace staircases of western Iberia: Uplift rate patterns from rocky limestone coasts of central Portugal (Cape Raso-Abano beach and Cape Espichel)

• Tipo: Artigo em Revista Científica Internacional
• Data: 2025

Autores

Martins, António A. (Autor) Outra; Gouveia, Margarida P. (Autor) Outra; Gomes, António Alberto (Autor) FLUP

Revista

Título: Quaternary International

Nº de Série Art. 109657 Vol. 720

ISSN: 1040-6182

Editora: Elsevier

Indexação

Scopus

Outras Informações

DOI: 10.1016/j.quaint.2024.109657

Abstract (EN): The Western Iberian Peninsula is undergoing compressive tectonic reactivation, resulting in spatial and temporal variations of surface uplift. Uplift quantification can be undertaken in coastal settings using staircases of shore platforms developed onto rocky headlands. This study analyses two marine terrace staircases in central Portugal: Cape Raso - Abano beach and Cape Espichel. Geomorphic and stratigraphic analyses identified marine terraces/shore platforms developed below a culminant shore platform, four at Cape Raso and eleven at Cape Espichel. The terrace chronology was obtained by using ESR and pIRIR dating. Using the interactions between the elevation, age and global mean sea-level elevations, the marine terraces were correlated with Marine Isotope Stages (MIS). The shore platforms at the Cape Espichel are more elevated than the coeval references at the Cape Raso - Abano beach and this indicates differential uplift. Considering the culminant shore platform (3.7 Ma), for the Espichel W promontory the estimated long-term uplift rate is ∼0.03 m/ka, but for the Cape Raso is only ∼0.01 m/ka. Also, by using the shore platform considered as produced by the MIS 15 high stand (∼572 ka), the estimated uplift rate for the Espichel W promontory is ∼0.13 m/ka, but for the Cape Raso is ∼0.07 m/ka. The Espichel W promontory terrace staircase also allows to deduce that the estimated uplift rate was nearly constant during ∼600 ka to ∼200 ka ago (∼0.13–0.11 m/kA), but it after decreases (∼0.06–0.01 m/ka).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Notas: Neste artigo também colaboraram: Pedro P. Cunha, João Cabral, Christophe Falguères, Pierre Voinchet, Martin Stokes, Bento Caldeira, Jan-Pieter Buylaert, Andrew S. Murray, Jean-Jacques Bahain, Silvério Figueiredo

Nº de páginas: 16