Geomorphology and Tectono-stratigraphy of the Neogene of the northwest sector of the Vaupes-Amazonas Basin

Using geophysical methods in geosciences for surface and subsurface studies in the Amazonas can contribute to the knowledge about the geometry and tridimensional disposition of layers located some hundreds of meters in depth. An integrating surface and subsurface data cover the analysis of structures geomorphological not yet described in the area. This study's seismic sections and well logs enabled in-depth preliminary model generation. Seismic and well data permits obtaining features like faults, canyons, and folds. Other geomorphological structures include channels, bars, valleys, erosions, and thinning of layers. Geomorphologic features obtained from analysis and geometry characterization make it possible to delight and describe faults and folds' presence, also delighted canyons of different sizes and valleys from the brittle reactivation of pre-existing structures in the Precambrian basement. Features like Lateral accretion, erosion, and thinning, influenced by processes of subsidence and isostasy, were found. The sedimentary sequences established in this framework belong to deposits with ages from the Paleogene to the Recent. This evidence may be related to the evolution of Alto do Vaupes, which occurs due to faults from the Lower Paleozoic, which underwent reactivation during the Paleogene to the recent, with associated tectonostratigraphic episodes.