Riparo Bombrini is a collapsed rockshelter within the Balzi Rossi site complex, located at the intersection of the Maritime Alps, Northern Apennines, and Ligurian Sea. This unique environmental setting served as a crucial biogeographical corridor for human mobility along the Liguro-Provençal Arc during the Paleolithic. Multidisciplinary research at Bombrini identified three archaeological layers (i.e., A2, A1, and A0) overlying a semi-sterile Mousterian level. This paper explores the internal variability of the Protoaurignacian by analyzing lithic assemblages from layers A2 and A1, as well as a previously undescribed Early Aurignacian assemblage from layer A0. An analysis of assemblage integrity, lithic technology, and raw material procurement reveals distinct mobility and land-use strategies, despite technological uniformity. Remarkably, lithic production and use in both Protoaurignacian and Early Aurignacian layers frequently involved exogenous materials sourced from distances exceeding 150 km, with some reaching up to 450 km, spanning from the Rhône Valley to the Central Apennines. Variability in the procurement distance of discarded lithics and their changing reduction intensities highlight distinct patterns of logistical and residential mobility. Comparative analysis with regional sites indicates that foragers possessed sophisticated territorial knowledge, challenging the traditional view of the Protoaurignacian as the outcome of pioneering groups entering unfamiliar landscapes.

High-resolution stratigraphic frameworks are crucial for unraveling the biocultural processes behind the dispersals of Homo sapiens across Europe. Detailed technological studies of lithic assemblages retrieved from multi-stratified sequences allow archaeologists to precisely model the chrono-cultural dynamics of the early Upper Paleolithic. However, it is of paramount importance to verify the integrity of these assemblages before building explanatory models of cultural change. In this study, multiple lines of evidence suggest that the stratigraphic sequence of Fumane Cave in northeastern Italy experienced minor post-depositional reworking, establishing it as a pivotal site for exploring the earliest stages of the Aurignacian. By conducting a systematic search for break connections between blade fragments and applying spatial analysis techniques, we identified three well-preserved areas of the excavation containing assemblages suitable for renewed archaeological investigations. Subsequent technological analyses, incorporating attribute analysis, reduction intensity, and multivariate statistics, have allowed us to discern the spatial organization of the site during the formation of the Protoaurignacian palimpsest A2–A1. Moreover, diachronic comparisons between three successive stratigraphic units prompted us to reject the hypothesis of techno-cultural continuity of the Protoaurignacian in northeastern Italy after the onset of the Heinrich Event 4. Based on the variability of the lithic and osseous artifacts, the most recent assemblage analyzed, D3b alpha, is now ascribed to the Early Aurignacian, aligning the evidence from Fumane with the current understanding of the development of the Aurignacian across Europe. Overall, this study demonstrates the high effectiveness of the break connection method when combined with detailed spatial analysis and lithic technology, providing a methodological tool particularly amenable to be applied to sites excavated in the past with varying degrees of recording accuracy.

The process by which Palaeolithic Europe was transformed from a Neanderthal-dominated region to one occupied exclusively by Homo sapiens has proven challenging to diagnose. A blurred chronology has made it difficult to determine when Neanderthals disappeared and whether modern humans overlapped with them. Italy is a crucial region because here we can identify not only Late Mousterian industries, assumed to be associated with Neanderthals, but also early Upper Palaeolithic industries linked with the appearance of early H. sapiens, such as the Uluzzian and the Aurignacian. Here, we present a chronometric dataset of 105 new determinations (74 radiocarbon and 31 luminescence ages) from four key southern Italian sites: Cavallo, Castelcivita, Cala, and Oscurusciuto. We built Bayesian-based chronometric models incorporating these results alongside the relative stratigraphic sequences at each site. The results suggest; 1) that the disappearance of Neanderthals probably pre-dated the appearance of early modern humans in the region and; 2) that there was a partial overlap in the chronology of the Uluzzian and Protoaurignacian, suggesting that these industries may have been produced by different human groups in Europe.