Arquitetura deposicional e dinâmica evolutiva de cordões litorâneos sob influência de delta, Espírito Santo (ES), Brasil

Abstract

Ridges are morphological features that frequently occur in coastal regions of prograding characteristic. These features are common along the deltaic lowland of Doce River (Espirito Santo, Brazil) however there are a lack of research works over their genesis and evolutive dynamics. The studies performed within Doce River’s region discuss its deltaic system hence its ridges are generically described though satellite images together with sedimentary and chronologic punctual data, which is inapplicable for a continuous lateral investigation of its subsurface. The GPR (Ground Penetrating Radar) application in coastal zones aiming the investigation of quaternary sedimentation has been widely explored due to the vertical subcentimetric resolution of this electromagnetic geophysical method. Therefore, to fulfill the lack of knowledge over Doce River’s deltaic lowland, the stratigraphic architecture of its complex ridges was investigated through the analysis and interpretation of GPR sections correlated to geochronologic and sedimentary unprecedented data acquired through the thematic project 2011/00995-7 sponsored by FAPESP and data available in the literature. As a result, sedimentary aspects and processes related to the ridges’ genesis and evolutive dynamics according to relative sea level variations (NRM) and climate changes.