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- W3172311312 abstract "<p>The topography, climate, and geology of the central Patagonian Andes provide an auspicious natural laboratory to track long-term rates of erosion in a dynamic mountainous landscape. Herein, we report a mountain-scale record of erosion rates in the central Patagonian Andes from >10 million years (Ma) ago to present, which covers the transition from a fluvial to alpine glaciated landscape. Apatite (U-Th)/He ages of 72 granitic cobbles from alpine glacial deposits show slow erosion before ~6 Ma ago, followed by a two- to three-fold increase in the spatially averaged erosion rate of the source region after the onset of alpine glaciations and a 15-fold increase in the top 25% of the distribution. This transition is followed by a pronounced decrease in erosion rates over the past ~3 Ma. We ascribe the pulse of fast erosion to local deepening and widening of valleys, which are characteristic features of alpine glaciated landscapes. The subsequent decline in local erosion rates may represent a return toward a balance between rock uplift and erosion.</p>" @default.
- W3172311312 created "2021-06-22" @default.
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- W3172311312 date "2021-03-03" @default.
- W3172311312 modified "2023-09-26" @default.
- W3172311312 title "An auspicious landscape: Quantifying transient glacial incision in the Patagonian Andes from ~6 Ma to present" @default.
- W3172311312 doi "https://doi.org/10.5194/egusphere-egu21-3278" @default.
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