Influence of low amplitude/high frequency relative sea-level changes in a wave-dominated estuary (Miocene), São Luis Basin, northern Brazil

2000 ◽  
Vol 133 (3-4) ◽  
pp. 295-324 ◽  
Author(s):  
D de Fátima Rossetti
Keyword(s):  
Sea Level ◽  
High Frequency ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Northern Brazil ◽  
Low Amplitude

A Model of Holocene Mangrove Development and Relative Sea-level Changes on the Bragança Peninsula (Northern Brazil)

2005 ◽  
Vol 13 (4) ◽  
pp. 433-443 ◽  
Author(s):  
Marcelo C. L. Cohen ◽  
Pedro W. M. Souza Filho ◽  
Rubén J. Lara ◽  
Hermann Behling ◽  
Rodolfo J. Angulo
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Northern Brazil ◽  
Mangrove Development

scholarly journals Holocene sea-level history along eastern-southeastern Brazil

2003 ◽  
Vol 26 ◽  
pp. 13-24
Author(s):  
Louis Martin
Keyword(s):  
Sea Level ◽  
High Frequency ◽  
Isotopic Fractionation ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
Supporting Evidence ◽  
Sea Level Changes ◽  
Relative Sea Level ◽  
Level Curves ◽  
High Frequency Oscillations

Relative sea-level curves have been delineated for several sectors of the Brazilian coast. In order to have homogeneous and consistent curves, very short segments of the coastline with the same framework are considered. To minimize systematic errors tied to the particular nature of an indicator, we use the maximum number of different indicators available from former positions of relative sea level. These sea-level curves show that, during the last 7000 years, the central Brazilian coast has been subjected to a submergence phase which lasted until 5100 14C yr BP (5600 cal yr BP), followed by a drop in sea level. This drop in sea level was not continuous but was interrupted by two high-frequency oscillations. The Salvador curve, the most detailed, can be used as a reference for the central portion of the Brazilian coastline. It is now presented with corrections for isotopic fractionation and reservoir effects as well as calibrations for astronomical ages. Additional supporting evidence for the existence of high-frequency oscillations is provided. They are of the same magnitude as is predicted for the future under greenhouse conditions. These data will help us to understand how the coastal systems will respond to these sea-level changes.

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