1. Center of Nuclear Energy in Agriculture; University of São Paulo; Av. Centenário, 303 Piracicaba SP 13400-970 Brazil
2. Department of Thematic Studies - Environmental Change; Linköping University; Linköping SE-581 83 Sweden
3. Departament of Sedimentary and Environmental Geology; Institute of Geosciences; University of São Paulo; Rua do Lago, 562 São Paulo SP 05508-080 Brazil
4. Department of Geological Sciences; University of Florida; Box 112120 Gainesville FL 32611-2120 USA
5. School of Oceanography; University of Washington; Seattle WA 98195-7940 USA