Late Neogene Erosion of the Alps: A Climate Driver?

Computer Science

Scientific paper

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Scientific paper

As with many mountain belts globally, the Alps have seen a large increase in sediment yield in the late Neogene. The hypothesis that this increase results from climate-change impacts on erosion rate over the past ˜5 Ma is testable, given the extensive work completed in the Alps. Sediment budgets, thermochronology-based cooling rates, and estimates of modern rock uplift and erosion in the Western Alps are reviewed to search for correlation in space and time that might fingerprint climatic events. Major increases in sediment yield are apparent starting in the late Messinian (5.5 Mya) and accelerating toward the present day; this suggests the occurrence of a series of climatic changes that increased erosion rates, even as tectonic processes appear to have slowed or stopped. At present, tight correlations in time are difficult to establish and there remain open questions about the role of tectonics in the coupled system.

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