The growth of East Africa's high topography during the past 30 million years cannot be explained by typical mountain-building processes. Numerical modelling shows that much of this topography formed in response to upwelling in the underlying mantle.
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Pik, R. East Africa on the rise. Nature Geosci 4, 660–661 (2011). https://doi.org/10.1038/ngeo1274
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DOI: https://doi.org/10.1038/ngeo1274
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