A global rate of denudation from cosmogenic nuclides in the Earth’s largest rivers

Hella Wittmann , Marcus Oelze , Jerome Gaillardet , Eduardo Garzanti & Friedhelm von Blanckenburg
Cosmogenic nuclide analysis in sediment from the Earth’s largest rivers yields mean denudation rates of the sediment-producing areas that average out local variations commonly found in small rivers. Using this approach, we measured in situ cosmogenic 26Al and 10Be in sand of >50 large rivers over a range of climatic and tectonic regimes covering 32% of the Earth’s terrestrial surface. In 35% of the analyzed rivers, 26Al/10Be ratios are significantly lower than these nuclides´ surface-production-rate...
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