The isotopic record of the Bambui Group, Brazil: Sturtian, Marinoan, and/or Early Paleozoic? - Babinski, Marly; Paula-Santos, Gustavo; Kuchenbecker, Matheus; Caetano-Filho, Sergio; Trindade, Ricardo Ivan Ferreira da; Pedrosa-Soares, Antônio Carlos (AGU Meeting of the Americas 2013, 2013)