SED Solid Earth Discussions SED Solid Earth Discuss. 1869-9537 Göttingen, Germany 10.5194/se-2018-140 The building, shaping, and filling of an Upper Slope Terrace: the Rio Grande Terrace, SW Atlantic de Mahiques Michel Michaelovitch https://orcid.org/0000-0002-5249-5610 1 2 Alcántara-Carrió Javier 1 Lobo Francisco José https://orcid.org/0000-0002-3294-7202 3 Schattner Uri https://orcid.org/0000-0002-4453-4552 4 dos Santos Rosangela Felício 1 Cazzoli y Goya Samara 1 Ramos Raissa Basti 1 Natorf de Abreu José Gustavo 5 Pereira de Souza Luiz Antonio 6 Lopes Figueira Rubens Cesar https://orcid.org/0000-0001-8945-4540 1 Bícego Marcia Caruso 1 Oceanographic Institute, University of São Paulo, São Paulo, 05508-120, Brazil Institute of Energy and Environment, University of São Paulo, São Paulo, 05508-010, Brazil Instituto Andaluz de Ciencias de la Tierra, Armilla, 18100, Spain Leon H Charney School of Marine Sciences, University of Haifa, Haifa, 3498838, Israel Escola do Mar, Ciência e Tecnologia, UNIVALI, Itajaí, 88302-901, Brazil Instituto de Pesquisas Tecnológicas do Estado de São Paulo, São Paulo, 05508-901, Brazil 13 02 2019 2019 1 27 Copyright: © 2019 Michel Michaelovitch de Mahiques et al. 2019 This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/ This article is available from https://se.copernicus.org/preprints/se-2018-140/ The full text article is available as a PDF file from https://se.copernicus.org/preprints/se-2018-140/se-2018-140.pdf

<p>In this work, we analyze the origin, evolution, and recent sedimentation of the Rio Grande Terrace (RGT), the most prominent upper slope terrace of the SW Atlantic. We gathered data from deep to shallow seismic, echo-sounding and surface sediments in order to recognize the role played by the geological inheritance, the sediment origin, and the present hydrodynamics, this last one defined by the action of the high speeds of the Brazil Current.</p> <p>The RGT is here interpreted as a unique geomorphological feature, which was developed over a pre-Aptian basement high. It presents a complex modern morphology, given by the erosional action of the Brazil Current and its present surface sediments show a high complexity in terms of origin and grain size.</p>

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