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The Loma del Kilometro Member of the Lower Ordovician Suri Formation records arc-related shelf sedimentation in the Famatina Basin of northwest Argentina. Nine facies, grouped into three facies assemblages, are recognized. Facies assemblage 1 [massive and parallel-laminated mudstones (facies A) locally punctuated by normally graded or parallel-laminated silty sandstones (facies B] records deposition...
Thick and widespread Late Carboniferous lacustrine successions occur in the Sierra de Narvaez area, northwest Argentina. A detailed lithofacies analysis forms the basis for the definition of fourteen lithofacies clustered into three assemblages. The delta assemblage consists of channelized cobble to pebble conglomerates, quartz-rich sandstones, and carbonaceous mudstones. This assemblage is present...