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The Uruguayan Continental Margin is located in a strategic location of great relevance to understand the dynamics of the regional and global climate and to study the sedimentary processes. The Rio de la Plata represents the largest fluvial discharge of the Southwest Atlantic (23.000 m 3 /s of water and 57.000.000 m 3 /year of sediment for the South Atlantic Ocean). The sub-surface and deep circulation are characterized by the confluence of water masses with contrasting thermohaline characteristics that determine the formation of well-marked hydrological fronts. In the continental shelf, this characteristic is represented by the Subtropical Shelf Front, as a shallow extension of the Brazil-Malvinas Confluence that occurs in deep water off the shelf. Although the knowledge of the regional circulation is acceptable, there are significant gaps in the knowledge related to the influence of this complex hydrological system on sedimentation processes. The objective of this work is to synthesize the present knowledge about the morpho-sedimentary characteristics of the Uruguayan Continental Margin and the processes involved in its formation. It also aims to discuss some knowledge gaps that are the subject of current research in the region. The knowledge reflects the scientific-technological evolution at a global level that is translated in the increase of recent works on the continental slope. Nowadays, most of the available information is associated with the inner shelf and upper slope. Starting from the basis of the close relationship between bathymetry and sedimentological distribution it is clear that efforts should be concentrated on the better understanding of the interaction between the shelf and the slope. The scientific knowledge regarding sedimentology and geochemistry along the Uruguayan Continental Margin is still, scarce and heterogeneous. However, it indicates complexity in the sedimentary coverture present both in the continental shelf and slope. The Uruguayan Continental Margin can be considered as an in situ laboratory to improve the understanding of the influence of oceanic hydrodynamics on the margin configuration, a key point to achieve better paleoceanographic interpretations. In this sense, due to the complexity of both modern hydrology and morphological configuration of the margin, it would be interesting to understand the relative importance of the control of each environment on surface sedimentation. A better understanding of the processes that link the near bottom circulation and continental slope features is needed. At the same time, this will allow deepening a new field of research in Uruguay, considering the joint and interrelated vision between sedimentary and oceanographic processes. Resumo A Margem Continental do Uruguai esta localizada num local estrategico de grande relevância para entender a dinâmica do clima regional e global e para estudar os processos sedimentares. O Rio de la Plata representa a maior descarga fluvial do Atlântico Sudoeste (23.000 m 3 /s de agua e 57.000.000 m 3 /ano de sedimento para o Oceano Atlântico Sul). A circulacao de subsuperficie e profunda sao caracterizadas pela confluencia de massas de agua com caracteristicas termohalinas contrastantes que determinam a formacao de frentes hidrograficas bem marcadas. Na plataforma continental, essa caracteristica e representada pela Frente Subtropical da Plataforma, uma extensao rasa da Confluencia Brasil-Malvinas que ocorre em aguas profundas ao largo da plataforma. Embora seja consideravel o conhecimento da circulacao regional, existem lacunas significativas no conhecimento da influencia deste complexo sistema hidrologico nos processos de sedimentacao. O objetivo deste trabalho e sintetizar o conhecimento atual sobre as caracteristicas morfo-sedimentares da Margem Continental Uruguaia e os processos envolvidos na sua formacao. Tambem pretende discutir algumas lacunas de conhecimento que sao objeto de pesquisas atuais na regiao. O conhecimento reflete a evolucao cientifico-tecnologica a nivel global, que se traduz no aumento de trabalhos recentes na vertente continental. Atualmente, a maior parte da informacao disponivel esta associada a plataforma continental interna e ao talude continental superior. Partindo da base da estreita relacao entre a batimetria e a distribuicao sedimentologica, torna-se claro que os esforcos devem ser concentrados na melhor compreensao da interacao entre a plataforma e o talude continental. O conhecimento cientifico sobre sedimentologia e geoquimica ao longo da Margem Continental do Uruguai e ainda escasso e heterogeneo. No entanto, os dados existentes indicam que a cobertura sedimentar presente tanto na plataforma quanto no talude continental e complexa. A Margem Continental do Uruguai pode ser considerada um laboratorio in situ para melhorar a compreensao da influencia da hidrodinâmica oceânica na configuracao da margem, ponto chave para se obterem melhores interpretacoes paleoceanograficas. Nesse sentido, devido a complexidade da hidrologia moderna e da configuracao morfologica da margem, seria interessante entender a importância relativa do controle de cada ambiente sobre a sedimentacao superficial. E necessario um melhor entendimento dos processos que ligam as caracteristicas de circulacao proxima do continente a que ocorre no talude continental. Este conhecimento permitira aprofundar um novo campo de pesquisa no Uruguai, considerando a visao conjunta e inter-relacionada entre processos sedimentares e oceanograficos.

journal of sedimentary environments

GEOMORPHOLOGICAL AND SEDIMENTOLOGICAL CHARACTERIZATION OF THE URUGUAYAN CONTINENTAL MARGIN: A REVIEW AND STATE OF ART / CARACTERIZAÇÃO GEOMORFOLÓGICA E SEDIMENTOLÓGICA DA MARGEM CONTINENTAL DO URUGUAI: UMA REVISÃO E ESTADO DA ARTE