RStone · Population interconnectivity and technological trajectories in southern Africa during the MIS3 through replicable lithic analysis

Our species emerged from gene flow between structured populations across various regions of Africa. This process entailed intermitted events of coalescence and fragmentation, visible in late Pleistocene archaeological records through changing patterns of lithic technological similarity. In this framework, the MIS3 (59–28 ka) is a particularly intriguing period because archaeologists working in southern Africa have hypothesized that the marked regional variance in lithic technology is ascribable to cultural fragmentation and reduced information exchange among dispersed populations. However, it may also stem from the lack of a replicable system for recording and statistically analyzing lithic traits. The RStone project seeks to address this research challenge by pursuing three primary objectives. Firstly, it will develop a standardized method for recording lithic traits through comprehensive replicability experiments. Secondly, it will utilize this established recording system to collect novel lithic data from seven well-dated MIS3 stratigraphic sequences across Malawi, Mozambique, Namibia, and South Africa. Finally, it will conduct a quantitative inter-site comparison to explore techno-typological similarities and differences and determine whether the observed variance follows a pattern of isolation by distance or if other factors, such as geological constraints, played a role in shaping the way in which human foragers produced stone tools. This research will yield valuable open-source tools implemented in the R programming language and high-resolution datasets. In line with open science practices, RStone will prioritize the transfer and sharing of these resources, with a particular focus on engaging young African researchers. The extensive collaboration network will ensure a robust dissemination of results while positioning the fellow as a key figure in exploring the intricate interplay between human cultural diversity and population dynamics during the Pleistocene.