Our detailed comparative analyses investigate all aspects and phases of the chaînes opératoires. at Melka Kunture, in the Ethiopian highlands, and in a specific period of time: between ~1.5 Ma, when some of the earliest Acheulean complexes appeared, and 1.0-0.85 Ma, when LCTs productions became intensive and widespread. The aim of this paper is to evaluate the techno-economic similarities and differences among LPA productions in a specific micro-regional and environmental context, i.e. But was the East African LPA really uniform as regards all components involved in lithic productions? Their degree of refinement has been used, in turn, as a parameter for evaluating Acheulean development and variability. The criterion for grouping together different lithic assemblages scattered over space and time is the presence of large cutting tools (LCTs), more than of any other component. Furthermore, the emergence and development of Acheulean technology are seen as linked to the emergence and evolution of Homo ergaster/erectus. The most comprehensive sequences are found in East Africa, where, in large-scale syntheses, the Lower Pleistocene Acheulean (LPA) has often been considered a uniform cultural entity. The Acheulean is the longest-lasting human cultural record, spanning approximately 1.5 Ma and three continents.
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