Professor Ian Stanistreet working at Olduvai Gorge in East Africa
Liverpool, UK - 6 October 2010: Geologists at the University of Liverpool are excavating a two-million-year-old World Heritage Site in Tanzania to understand how climate variations may have contributed to early human evolution. Olduvai Gorge is a steep-sided ravine on the edge of the Serengeti Plain, East Africa, and is home to some of the world's most important fossil hominins. Geologists are investigating the chemical composition of carbonate rocks that lie beneath the surfaces where early human fossils have been uncovered. The data will help an international team of geologists, paleoanthropologists and archaeologists understand how environmental pressures may have influenced the development of human ancestors and their use of the land. Professor Ian Stanistreet, from the School of Environmental Sciences, said: "Research findings so far suggest that environmental changes, such as very dry conditions to very wet, were more extreme and took place more frequently than previously thought. It is currently unclear how these changes might have contributed to human evolution, but evidence indicates that an ability to cope with hostile and rapidly changing environments may have characterised and shaped the development of the human race." The team is investigating elements in the mineral calcium carbonate, which were deposited in the mud and soil in and around a lake between two and 1.7 million years ago. Carbonates formed in the semi-arid environment of the Olduvai Gorge through evaporation and concentration of soil and lake water.
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