Marine geophysical data from the cruise. The Amazon Cone is a deep-sea fan system that developed on a continental margin, North East Brazil and French Guiana, approximately 90-100 Myr following a rifting event. Gravityand flexure modelling suggest that the Cone sediments have loaded the margin almost to the limits of its strength. The investigators propose to carry out the first seismic refraction experiment to determine the structure of the crust and mantle that has been deformed by the Cone load. The experiment will provide new constraints on the structure, the nature of the ocean-continental boundary, the thermal and mechanical properties, and the resource potential of deep-water continental margins. Latitude Longitude and Value for underway geophysical data ( bathymetry magnetics (total field) and Free air gravity anomaly)