10Be-inferred paleo-denudation rates imply that the mid-Miocene western central Andes eroded as slowly as today.

ABSTRACT: Terrestrial cosmogenic nuclide concentrations of detrital minerals yield catchment-wide rates at which hillslopes erode. These estimates are commonly used to infer millennial scale denudation patterns and to identify the main controls on mass-balance and landscape evolution at orogenic scale. The same approach can be applied to minerals preserved in stratigraphic records of rivers, although extracting reliable paleo-denudation rates from Ma-old archives can be limited by the target nuclide's half-life and by exposure to cosmic radiations after deposition. Slowly eroding landscapes, however, are characterized by the highest cosmogenic radionuclide concentrations; a condition that potentially allows pushing the method's limits further back in time, provided that independent constraints on th

SUBMITTER: Madella A 

PROVIDER: S-EPMC5797110 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature