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Plio-Pleistocene East African Pulsed Climate Variability and Its Influence on Early Human Evolution

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The First Humans – Origin and Early Evolution of the Genus Homo

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Long-term climate change seems to be modulated primarily by tectonic changes at both the global and local scale (Maslin et al., 2001). Late Cenozoic global cooling has been ascribed to both the uplift of Tibet (Ruddiman and Raymo, 1988), and the closure of the Panama Isthmus (Haug and Tiedemann, 1998), although the exact role of atmospheric carbon dioxide is still unclear (Sundquist and Visser, 2004). In East Africa, long-term climate change is also controlled by local tectonics, especially the dynamic development of the branching East African Rift System (Sepulchre et al., 2006). Early hominin evolution in East Africa thus occurs at the same time as both long-term global cooling and extensive local tectonic changes. There is a compelling need to understand how these two environmental factors interact at the local scale and affect fl ora and fauna living in the East African Rift. The geologic record of the last 5 million years demonstrates that both local and global infl uences can lead to extremely rapid environmental change (Maslin and Christensen, 2007).

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Maslin, M.A., Trauth, M.H. (2009). Plio-Pleistocene East African Pulsed Climate Variability and Its Influence on Early Human Evolution. In: Grine, F.E., Fleagle, J.G., Leakey, R.E. (eds) The First Humans – Origin and Early Evolution of the Genus Homo. Vertebrate Paleobiology and Paleoanthropology. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-9980-9_13

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