Institution: | 1. School of Geographical Sciences, University of Bristol, , Bristol BS8 1SS, UK;2. Bristol Isotope Group, University of Bristol, , UK;3. Institute of Geology and Palaeontology, University of Innsbruck, , Innrain 52, 6020 Innsbruck, Austria;4. Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), , Burgos, Spain |