stone tool
Recently Published Documents

Abstract After the Last Glacial Maximum, important yet milder climatic trends continued to characterise the Holocene. None of them was more challenging to forager groups in the central west coast of South Africa than the mid-Holocene Altithermal (8200–4200 cal BP). Hot and dry weather and 1–3 m higher sea levels were thought once to have barred local foragers from this region because of a lack of sites dating to this period. Instead, this initial scenario reflected largely a sampling problem. Steenbokfontein Cave is one of a few sites with some of the largest mid-Holocene deposits, allowing insights into forager adaptations during this period. Results show high mobility over large distances and a terrestrial diet mostly dependant on small bovids, complemented with fewer coastal resources. Stone tool kits and lithic raw materials among various sites suggest that much evidence for mid-Holocene occupation is actually found near the local riparian systems.

Abstract High-magnification use-wear analyses create datasets that enable microeconomic studies of lithic consumption and household activities that complement macroeconomic studies of lithic production and exchange to collectively improve our reconstructions of ancient economies. In recent decades, compositional and technological analyses have revealed how certain obsidian sources and lithic technologies were exploited, produced, and exchanged in Mexico's central highlands region during the Formative period (1500 b.c.–a.d. 100). This article presents use-wear analyses of 275 lithic artifacts from four sites in northern Tlaxcala—Amomoloc (900–650 b.c.), Tetel (750–500 b.c.), Las Mesitas (600–500 b.c.), and La Laguna (600–400 b.c. and 100 b.c.–a.d. 150)—to compare household activities with lithic technologies and evaluate their roles in regional economies. Blades were used for subsistence and domestic crafting; maguey fiber extraction for textile production increased over time, especially in non-elite households. The preparation and consumption of meat acquired by hunting and other methods increased slightly over time, and bipolar tools were used as kitchen utensils. Bloodletting was practiced with two variations of late-series pressure blades, but these and other tools were neither exchanged as nor used to craft prestige goods, often viewed as driving forces of Formative economies in Mesoamerica.

Our knowledge of the recolonization of north-west Europe at the end of the Last Glacial Maximum depends to a large extent on finds from Gough’s Cave (Somerset, UK). Ultra-high resolution radiocarbon determinations suggest that the cave was occupied seasonally by Magdalenian hunters for perhaps no more than two or three human generations, centred on 12,600 BP (~14,950–14,750 cal BP). They left behind a rich and diverse assemblage of Magdalenian lithic and osseous artefacts, butchered animal bones, and cannibalised human remains. The faunal assemblage from Gough’s Cave is one of the most comprehensively studied from any Magdalenian site, yet new and unexpected discoveries continue to be made. Here, we record previously unrecognized flint-knapping tools that were identified during a survey of the Gough’s Cave faunal collection at the Natural History Museum (London). We identified bones used as hammers and teeth manipulated as pressure-flakers to manufacture flint tools. Most of the pieces appear to be ad hoc (single-use?) tools, but a horse molar was almost certainly a curated object that was used over an extended period to work many stone tools. This paper explores how these knapping tools were used to support a more nuanced understanding of Magdalenian stone-tool manufacturing processes. Moreover, we provide a standard for identifying minimally-used knapping tools that will help to establish whether retouchers and other organic stone-working tools are as rare in the Magdalenian archaeological record as current studies suggest.

Early stone tools are claimed to be the earliest evidence for the cultural transmission of toolmaking techniques, and with it, cumulative culture. This claim has ostensibly been supported by experimental studies wherein modern humans learned stone tool production (knapping) in conditions that provided opportunities for cultural transmission. However, alternative hypotheses propose that individual learning was sufficient for the expression of early knapping techniques. In order to evaluate this possibility, the capacities of individuals to independently re-innovate early knapping techniques need to be determined. For this, individuals must be tested in cultural isolation, i.e., in a test condition in which knapping techniques cannot be culturally transmitted via demonstrations or reverse engineering. Here, we report on the results of this test condition with human participants (N = 28). Naïve individuals spontaneously re-innovated various early knapping techniques, resulting in products resembling the earliest core and flake technologies. These results contradict previous hypotheses and conclusions of earlier experiments that explicitly implicated cultural transmission in Oldowan stone tool production. They suggest instead that knapping techniques among pre-modern hominins could have been individually derived rather than necessitating cultural transmission.

Abstract Robust capuchin monkeys (Sapajus) are known for accessing mechanically challenging food. Although presenting morphological adaptations to do so, several populations go beyond the body limitations, using tools, mainly stone tools, to expand their food range. Those populations are diverse, some using stones more widely than others. We know stone tool size correlates with the target's resistance within some populations, but we have no detailed comparisons between populations so far. This study described and compared general environmental data, food’s physical properties, and stone tools features on three populations of bearded capuchin monkeys (Sapajus libidinosus), including a new site. The differences we observed regarding stone tool use between the new site (CVNP) and the previously studied ones could be partially explained by ecological factors, such as the raw material and resource availability. However, other differences appear to be more related to behavioral traditions, such as the processing of Hymenaea at CVNP, where the monkeys use bigger stones than other populations to process the same kind of food, which present similar physical properties between sites. Possible cultural differences need to be compared within a larger number of areas to better understand capuchin monkey behavioral variability.

AbstractDebates and doubt around the interpretation of use-wear on stone tools called for the development of quantitative analysis of surfaces to complement the qualitative description of traces. Recently, a growing number of studies showed that prehistoric activities can be discriminated thanks to quantitative characterization of stone tools surface alteration due to use. However, stone tool surfaces are microscopically very heterogeneous and the calculated parameters may highly vary depending on the areas selected for measurement. Indeed, it may be impacted by the effects from the raw material topography and not from the altered zones only, if non-altered part of the surface is included in the measurement. We propose here to discuss this issue and present a workflow involving the use of masks to separate worn and unworn parts of the surface. Our results show that this step of extraction, together with suitable filtering, could have a high impact on the optimization of the detection and thus characterization of use traces. This represents the basis for future automatic routines allowing the detection, extraction and characterization of wear on stone tools.

In this glossary, we aim to initiate a synthesis and standardisation of analytical terms for early wood technologies from stone-tool using cultures. This glossary and code relies upon ongoing research and experience of the authors, alongside recent publications that also undertake systematic analyses and descriptions of wood technologies and traces from stone-tool using cultures. While it forms the foundation for our ongoing analysis and documentation of the wet and conserved woods from the Pleistocene site of Schöningen (Germany), we hope it may also provide a means for collaboration and communication with those working on wood from other Pleistocene and Holocene sites.

В ходе археологических исследований кургана № 2 из группы из двух курганов у с. Льговского (Республика Крым) было исследовано 22 погребения эпохи бронзы - раннего железного века. В одном из погребений эпохи бронзы был обнаружен скелет молодого мужчины, на черепе которого были зафиксированы следы трепанации. В статье представлены результаты ее комплексного исследования. Данная трепанация отличается крупным размером и сохранением тонкой нижней пластинки кортикального слоя кости на большей части поверхности места операционного вмешательства. Преобладающей техникой выполнения операции было скобление каменным орудием. Трасологический анализ выявил комплекс следов, оставленных по меньшей мере двумя инструментами с различным рабочим лезвием. Выдвигается предположение о лечебной цели проведения манипуляции. The archaeological excavations of kurgan 2 from the group of two kurgans near the L'govskoye village (Republic of Crimea) examined 21 burials dating to the Bronze Age - Early Iron Age. One of the Bronze Age burials yielded a skeleton of a young man with traces of trepanation on the skull. The paper reports on the results of its comprehensive research. This trepanation is noted for its large size and preservation of a thin lower plate of the bone cortical layer on a large surgically treated region. Scraping with a stone tool was a prevailing method of surgical procedures. The trace wear analysis revealed a series of traces left by at least two tools with different cutting edges. The paper also suggests that this surgical intervention was performed for treatment purposes.

The Early Stone Age record preserves a rich behavioural signature of hominin stone tool making and use. The role of percussive technology in the daily subsistence strategies of our earliest ancestors has seen renewed focus recently. Studies of modern primate tool use highlight the diverse range of behaviours potentially associated with percussive technology. This has prompted significant methodological developments to characterize the associated damage marks (use-wear) on hammerstones and anvils. Little focus has, however, been paid to identifying whether these techniques can successfully differentiate between the damage patterns produced by specific and differing percussive behaviours. Here, we present a novel workflow drawing on the strengths of visual identification and three-dimensional (3D) surface quantification of use-wear. We apply this methodology firstly to characterize macaque percussive use-wear and test the efficacy of 3D surface quantification techniques in differentiating between percussive damage and natural surface topography. Secondly, we use this method to differentiate between use-wear associated with various wild macaque percussive behaviours. By combining analyst-directed, 3D surface analysis and use-wear dimensional analysis, we show that macaque percussive behaviours create specific diagnostic signatures and highlight a means of quantifiably recording such behavioural signatures in both primate and hominin contexts.