Back to Search
Start Over
Sea-level rise and sediment budget controlling the evolution of a transgressive barrier in southern Brazil
- Source :
-
Journal of South American Earth Sciences . Mar2013, Vol. 42, p27-38. 12p. - Publication Year :
- 2013
-
Abstract
- Abstract: This paper presents an evolutionary model for a coastal barrier in the southernmost coastal sector of Brazil during the Holocene. The dataset is based on 15–20 m drill cores and ground-penetrating radar (GPR) records. The model barrier evolution has two main steps. The first step is the transgression of the barrier controlled by sea-level rise during the Postglacial Marine Transgression, which ended at approximately 6–5 cal ka. Radiocarbon dating indicates that the coastal plain began to be flooded by lagoonal waters between ∼10 and 6.7 cal ka. The second step comprises a barrier transgression controlled by a negative sediment budget of the beach system during the last 6–5 cal ka in a period of an overall slow sea-level fall of approximately 2 m. During the second step, the transgressive barrier migrated because of coastal erosion (the negative sediment budget) and the landward transference of sand by wind and lagoonal delta washout. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 08959811
- Volume :
- 42
- Database :
- Academic Search Index
- Journal :
- Journal of South American Earth Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 85279993
- Full Text :
- https://doi.org/10.1016/j.jsames.2012.07.002