In a recent contribution to the Geological Society of America Bulletin, Carrapa et al. (2008) provided an interesting geochronological and thermochronological database for the Fiambalá Basin, northern end of the Sierras Pampeanas, which, together with stratigraphic, sedimentological and structural data, led them to interpret a late Miocene–Pliocene foreland reorganization from a simple scenario (e.g., DeCelles and Giles, 1996) to settings dominated by intermontane basement thrusting. They associated this reorganization with the beginning of flat subduction, which would have been coeval (according to Carrapa et al., 2008) with broken foreland stages in the Bermejo Basin (>400 km south)....
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