Bioturbation and the upward movement of sediment particles and archaeological materials: comments on Bueno et al.

The literature on bioturbation, both from the biological and archaeological points of view, is growing steadily. Available data suggests that ants and termites are responsible for the upward movement of soil/sediment particles and archaeological materials. It is argued that this could be the most parsimonious explanation for the stratigraphic data presented by Bueno et al. (2013), given the size range of displaced materials and the environmental setting, composed of a sandy soil in a savannah region.