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Etude de l'évolution morphologique des lignes de côte et des cordons littoraux du Brésil par rapport au variations du niveau marin au cours du Quaternaire
The central part of the Brazilian coast experienced considerable relative sea-level fluctuations during the Quaternary. It has been possible to identify three high marine levels. The last two, during which the sea-level was at a maxium 8 + or - 2 m (123,000 yr BP) and 4.8 + or - 0.5 m (5,100 yr BP) above the current level, have left substantial records, whose identification was possible due to numerous absolute datings. This sea-level history had a profound effect on the evolution of sedimentary plains. Wave energy, tidal range and river loads, for example, have been considered as the most important factors in the classical models of coastal sedimentation. However, the role played by relative sea-level changes has been not much considered. Probably, this is due to the fact that the models have been proposed by authors from the northern...
L'étude géologique et sédimentologique des dépôts quaternaires côtiers de l'Etat d'Alagoas permet de tracer l'évolution paléogéographique des côtes et de la ligne de rivage de cette région.
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