Paleosol carbonates from the Omo Group: Isotopic records of local and regional environmental change in East Africa

a Department of Earth & Planetary Sciences, Johns Hopkins University, 3400 N. Charles Street, 301 Olin Hall, Baltimore MD 21218, USA b Department of Geology & Geophysics, University of Utah, 115 S. 1460 East, Room 383, Salt Lake City UT, 84112, USA c Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, D.C., 20013, USA d Department of Anthropology, University of Georgia, 265B Baldwin Hall, Jackson Street, Athens, Georgia 30602-1619, USA