Interacción entre depósitos aluviales y costeros en la Formación Furnas. Devónico en la Cuenca del Paraná, Brasil

The depositional environment of Upper Silurian-Lower Devonian strata along the eastern margen of the Paraná Basin, Brazil, is reconstructed. Sedimentological analyses are based on a detailed study of two basal sections of the Furnas Formation in Paraná State. Sedimentation was initiated as an alluvial braided system, as evindenced mainly by ridge and bar facies. This evolved into a deltaic complex including mounth bar facies. The alluvial facies grades also laterally into a coastal marine deposits along a sinous shoreline