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Isotopic Evidence for Neogene Hominid Paleoenvironments in the Kenya Rift Valley
Abstract
Bipedality, the definitive characteristic of the earliest hominids, has been regarded as an adaptive response to a transition from forested to more-open habitats in East Africa sometime between 12 million and 5 million years ago. Analyses of the stable carbon isotopic composition (δ 13 C) of paleosol carbonate and organic matter from the Tugen Hills succession in Kenya indicate that a heterogeneous environment with a mix of C3 and C4 plants has persisted for the last 15.5 million years. Open grasslands at no time dominated this portion of the rift valley. The observed δ 13 C values offer no evidence for a shift from more-closed C3 environments to C4 grassland habitats. If hominids evolved in East Africa during the Late Miocene, they did so in an ecologically diverse setting.
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Lovejoy, C. O. (1981) · Science · doi:10.1126/science.211.4480.341 · Cited by 1,396
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Cenozoic vegetation, climate changes and hominid evolution in tropical Africa
Bonnefille, R. (2010) · Global and Planetary Change · doi:10.1016/j.gloplacha.2010.01.015 · Cited by 309
East African climate pulses and early human evolution
Maslin, M. A., Brierley, C. M., Milner, A. M., Shultz, S., Trauth, M. H., & Wilson, K. E. (2014) · Quaternary Science Reviews · doi:10.1016/j.quascirev.2014.06.012 · Cited by 278
Metadata
- Authors
- Kingston, J. D., Hill, A., & Marino, B. D.
- Venue
- Science
- Published
- 1994-05-13
- Volume
- 264
- Issue
- 5161
- Pages
- 955-959
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2000584321
- Cited by
- 256
- References
- 1
- FWCI
- 46.55
- Type
- journal article
- Language
- en
- Open access
- closed
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