The Sao Sebastiao Island, located in the Bight of Sao Paulo, southeastern Brazil, holds a kilometric scale deposit whose distribution, internal structure and age are still unknown. Due to its geographical position, it is believed that the deposit genesis is the result of the combined influence of the Brazil Current to the north, and the sediment plume derived from the La Plata River to the south of the island. Geophysical and sediment data were collected in the region between 2013 and 2015 in order to study the genesis and evolution of the sedimentary wedge off Sao Sebastiao Island. The available data will be complemented with additional sedimentological data to be collected in 2015. The available seismic data indicates that the sedimentary wedge extends along the shelf for approximately 32 km, oriented SW-NE and exhibiting an average sediment thickness that varies from 12 to 20 m.
