The impacts of lateral obliqueness and edge angle on Levallois point morphology

The study of Levallois points is important as it combines themes relating to Levallois technology in general (such as cognitive evolution, standardisation, and cultural transmission) with discussions on the specific function of stone tools (for example, the notion of points as spear tips). Many Levantine Middle Palaeolithic assemblages feature a strong focus on Levallois point production. Traditionally, this phenomenon has been studied from a typological perspective, while more recent technological approaches have added layers of understanding, such as the recognition of the frequently recurrent Levallois character of point production in the area. Likewise, use-wear and residue analyses have led to changing perceptions of the function of Levallois points. Here we explore how two quantifiable aspects of Levallois points - cross-section angles and lateral angles - relate to the morphology of Levallois points. By combining experimental knapping with an analysis of Levallois points from Yabroud I, Syria, we show that the obliqueness of lateral preparatory removals has a significant impact on the morphology of Levallois points, particularly in terms of the feature of a Concorde-shaped profile. Likewise, we show that the lateral edge angle influences the length of the points produced. Not only does this study improve of our understanding of Levallois points, but it highlights the importance of angles in studying lithic technology. We emphasize that this study aims to investigate the impact of oblique preparatory removals on the morphology of Levallois points generally, through an initial case study of one assemblage, allowing future multivariate analysis of multiple assemblages to test our hypotheses.