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- Lithic bipolar methods as an adaptive strategy through space and timePublication . Horta, Pedro; Bicho, Nuno; Cascalheira, JoãoThe use of bipolar (on anvil) methods for resource exploitation has been identified in the archaeological record from the late Pliocene through to the Holocene. During all phases of human evolution, bipolar knapping and wedging were applied by different hominin species in a wide range of ecological settings. Studies on lithic bipolar methods have mainly focused on understanding the functional aspects of this technology. This paper explores the variability of the application of these methods during the Paleolithic on a macro scale. Through the meta-analysis of published data from 167 sites, it is posited that the use of bipolar methods may have had a significant impact on hominin expansion, adaptation, and survival strategies. Furthermore, the recurrent use of bipolar methods is not only an indicator of its success as an adaptive strategy, but also of how hominins were able to evaluate different types of efficiency through time.
- Curated character of the initial upper palaeolithic lithic artefact assemblages in Bacho Kiro Cave (Bulgaria)Publication . Tsanova, Tsenka; Delvigne, Vincent; Sirakova, Svoboda; Anastasova, Elka; Krumov, Ivaylo; Horta, Pedro; Marreiros, João; Nacheva, Elena; Rezek, Zeljko; Hublin, Jean-Jacques; Sirakov, Nikolay; Michael D. PetragliaThe dispersal of Homo sapiens across Eurasia during MIS 3 in the Late Pleistocene is marked by technological shifts and other behavioral changes, known in the archaeological record under the term of Initial Upper Paleolithic (IUP). Bacho Kiro Cave in north Bulgaria, re-excavated by us from 2015 to 2021, is one of the reference sites for this phenomenon. The newly excavated lithic assemblages dated by radiocarbon between 45,040 and 43,280 cal BP and attributed to Homo sapiens encompass more than two thousand lithic artifacts. The lithics, primarily from Layer N1-I, exist amid diverse fauna remains, human fossils, pierced animal teeth pendants, and sediment with high organic content. This article focuses on the technological aspects of the IUP lithics, covering raw material origin and use-life, blank production, on-site knapping activities, re-flaking of lithic implements, and the state of retouched lithic components. We apply petrography for the identification of silicites and other used stones. We employ cha & icirc;ne op & eacute;ratoire and reduction sequence approaches to profile the lithics techno-typologically and explore the lithic economy, particularly blade production methods, knapping techniques, and artifact curation. Raw material analysis reveals Lower Cretaceous flints from Ludogorie and Upper Cretaceous flints from the Danube region, up to 190 km and 130 km, respectively, from Bacho Kiro Cave, indicating long-distance mobility and finished products transport. Imported lithic implements, were a result of unidirectional and bidirectional non-Levallois laminar technology, likely of volumetric concept. Systematic on-anvil techniques (bipolar knapping) and tool segmentation indicate re-flaking and reshaping of lithic implements, reflecting on-site curation and multifaceted lithic economy. A limited comparison with other IUP sites reveals certain shared features and also regional variations. Bacho Kiro Cave significantly contributes to understanding the technological and behavioral evolution of early Homo sapiens in western Eurasia.