Distribution Pattern And Sedimentation Of The Neogene Deep Water Section In The Campos Basin, Offshore Brazil

The Campos Basin, offshore Rio de Janeiro State, was a deposition site of a thick deep-water sedimentary<br>section (maximum of 2500 meters) on the continental slope and basin during the Neogene (fig.1).<br>In Campos Basin the cycle boundaries are the key elements of sequence stratigraphy which can be identified in seismic<br>sections by conventional seismostratigraphy methods, well log correlation and biostratigraphy. Several third-order<br>unconformity events were identified in the studied interval (fig.2). Despite the good correspondence of cycle boundaries<br>with the global eustatic lowering, the sequence stratigraphy model does not explain the sequence pattern observed in<br>Campos Basin. This holds true especially with regard to the nature of deep-water wedges and some erosional<br>unconformities associated with them. These wedges consist entirely of deep-water facies with bathyal faunas, differently<br>from the conventional sequence stratigraphy model (fig.2).