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Evidence for stone-tool-assisted consumption of animal tissues before 3.39 million years ago at Dikika, Ethiopia
The discovery of stone-tool-inflicted marks on bones found during recent survey work in Dikika, Ethiopia, extends by approximately 800,000 years the antiquity of stone tools and ofStone- tool-assisted consumption of ungulates by hominins and can now be attributed to Australopithecus afarensis.
Woody cover and hominin environments in the past 6 million years
It is shown that the fraction of woody cover in tropical ecosystems can be quantified using stable carbon isotopes in soils, and 13C/12C ratio data point to the prevalence of open environments at the majority of hominin fossil sites in eastern Africa over the past 6 million years.
A juvenile early hominin skeleton from Dikika, Ethiopia
The foot and other evidence from the lower limb provide clear evidence for bipedal locomotion, but the gorilla-like scapula and long and curved manual phalanges raise new questions about the importance of arboreal behaviour in the A. afarensis locomotor repertoire.
The Pyrogenic Carbon Cycle
Pyrogenic carbon (PyC; includes soot, char, black carbon, and biochar) is produced by the incomplete combustion of organic matter accompanying biomass burning and fossil fuel consumption. PyC is…
Influence of Plio-Pleistocene aridification on human evolution: evidence from paleosols of the Turkana Basin, Kenya.
- J. Wynn
- Environmental Science, GeographyAmerican journal of physical anthropology
- 1 February 2004
The hypothesis that hominins evolved in savanna mosaics that changed through time, and suggest that the evolution of bovids and hom inins was driven by shifts in climatic instability and habitat variability, both diachronic and synchronic, is supported.
Stable carbon isotope depth profiles and soil organic carbon dynamics in the lower Mississippi Basin
Carbon isotope fractionation during decomposition of organic matter in soils and paleosols: Implications for paleoecological interpretations of paleosols
- J. Wynn
- Environmental Science, Geography
- 8 August 2007
Isotopic evidence of early hominin diets
- M. Sponheimer, Z. Alemseged, J. Wynn
- Environmental Science, GeographyProceedings of the National Academy of Sciences
- 3 June 2013
There is a trend toward greater consumption of 13C-enriched foods in early hominins over time, although this trend varies by region, and hominin carbon isotope ratios also increase with postcanine tooth area and mandibular cross-sectional area, which could indicate that these foods played a role in the evolution of australopith masticatory robusticity.
Paleosols, stable carbon isotopes, and paleoenvironmental interpretation of Kanapoi, Northern Kenya.
- J. Wynn
- Environmental Science, GeographyJournal of human evolution
- 1 October 2000
Synthesis of paleoenvironmental indicators of A. anamensis at Kanapoi and Allia Bay, Kenya suggests that as early as 4 Ma hominids thrived in varied ecosystems.
The Pleistocene fauna (other than Primates) from Asbole, lower Awash Valley, Ethiopia, and its environmental and biochronological implications