Since the early 1960s archaeologists have realised the importance of understanding the effects of natural site formation processes on archaeological sites and material. Of the many processes that exist, this study looks at sedimentation with regard to lake margins and its impact on the archaeological record. The chapters of this volume present the methodology and background to this research, as well as the results of site formation experiments and compare the effects of these processes with other agencies that have the potential to transform an archaeological site. The author's case study examines Plio-Pleistocene deposits from East and Central Africa.