Samuel Lukens Goldberg¹, Morgan J. Schmidt¹, Eric Deal², J Taylor Perron³, Michael Heckenberger⁴, Wetherbee Bryan Dorshow⁵, Afukaka Kuikuro⁶, Paulo De Oliveira⁷ and Andre O Sawakuchi⁸, (1)Massachusetts Institute of Technology, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, (2)Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, (3)MIT---EAPS, Cambridge, MA, United States, (4)University of Florida, Anthropology, Gainesville, FL, United States, (5)Organization Not Listed, Washington, DC, United States, (6)Kuikuro Indigenous Association of the Upper Xingu (AIKAX), Ipatse, Brazil, (7)Micropaleontology Laboratory, Department of Sedimentary and Environmental Geology-GSA, Institute of Geosciences -Igc, University of São Paulo-USP, Brazil, São Paulo, Brazil, (8)University of São Paulo, Institute of Geosciences, São Paulo, Brazil