Climate aridity delays morphological response of Andean river valleys to tectonic uplift

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dc.contributor.authorHarries, Rebekah M.
dc.contributor.authorAron, Felipe
dc.contributor.authorKirstein, Linda A.
dc.date.accessioned2025-01-20T20:08:32Z
dc.date.available2025-01-20T20:08:32Z
dc.date.issued2023
dc.description.abstractIn the south Central Andes, a complex relationship between climate, tectonics, erosion and topography is well documented. Building on recent advances in the mechanical modelling of subduction zones, we isolate the contribution of fault motion to topography and observe how rock uplift has been recorded in river valley morphology. Rivers on the wetter, western Chilean-side of the Andean cordillera have steep and narrow valleys, in stark contrast to those draining east across the arid Argentinian cordillera, whose valleys are variably wider and less steep. The Chilean rivers have responded to fault slip along the western mountain front by incising vertically and propagating a steepening zone upstream. In Argentina, there is little evidence of channel steepening despite predictions for higher vertical rock uplift rates. We hypothesise that the aridity of the Argentinian region has limited the transport capacity of the rivers to export their sediment fill and as a result, vertical incision has been inhibited and lateral incision and valley widening favoured. The long-term climate gradient appears to have been important in modulating the morphological response of these rivers to fault slip. These factors precondition future landscape sensitivity to both tectonic and climatic change.
dc.fuente.origenWOS
dc.identifier.doi10.1016/j.geomorph.2023.108804
dc.identifier.eissn1872-695X
dc.identifier.issn0169-555X
dc.identifier.urihttps://doi.org/10.1016/j.geomorph.2023.108804
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91913
dc.identifier.wosidWOS:001037092700001
dc.language.isoen
dc.revistaGeomorphology
dc.rightsacceso restringido
dc.subjectClimate
dc.subjectTectonics
dc.subjectRiver
dc.subjectSediment
dc.subjectAndes
dc.subjectSubduction zone
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleClimate aridity delays morphological response of Andean river valleys to tectonic uplift
dc.typeartículo
dc.volumen437
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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