Search

In southern Africa, heat treatment of silcrete is documented by ~ 164 ka and is considered an important technological innovation, allowing knappers to improve the flaking properties of rocks for lithic blank production. Previous research has explored structural, mechanical, and geochemical changes in silcrete during heat treatment, but most studies have not explored the implications of those transformations for the blanks produced. Experiments that have examined the effects of heat treatment on blank production tend to rely on replicative flintknapping, where small changes in the way a blank is removed can create “noise.” In this study, we provide quantitative data to understand the effects of silcrete source and heating temperature on blank production using a flaking machine to isolate the effects of heat treatment on blank morphology. Our results show changes in absolute blank dimensions, and in the frequency of abrupt terminations as a result of heat treatment. However, the benefits of heat treatment may only occur within a limited temperature range and are heavily source dependent. This suggests that we should reconsider broad generalizations about the role of heat treatment in lithic technology and its supposed benefits and focus more on silcrete source and source-based effects on blank production. [ABSTRACT FROM AUTHOR]

The bipolar technique has been widely used across a wide range of prehistoric contexts, from the Lower Pleistocene to the Metal Ages, and is a defining feature of the Uluzzian technocomplex, evident in the Early Upper Palaeolithic of Italy and Greece. The objective of this paper is to examine whether the use of the bipolar technique within the Uluzzian extends beyond its conventional definition as a mere technique. To address this question, we conducted goal-orientated experimental flaking, focusing on the industries found at key Uluzzian sites in Italy: Broion, La Fabbrica, and Castelcivita. A comprehensive review of archaeological and ethnographic evidence further supplemented our study on the application of the bipolar technique. While bipolar reduction typically involves less procedural control, resulting in a diverse range of blanks, our research shows that adhering to certain discernible principles can indeed exert control over specific morphological features of the resulting products. Factors such as blank selection and configuration, along with the management of volumes and edges, contribute to high productivity, the generation of elongated products, and miniaturization as distinctive characteristics. These findings collectively establish the bipolar reduction on an anvil in the Uluzzian as a systematic method of debitage. [ABSTRACT FROM AUTHOR]

Around 8200 years ago, the Storegga tsunami hit the west coast of South Norway. The physical extent of the tsunami has been well documented but the consequences of the event for contemporary societies have received little attention beyond broad generalizations and, more recently, demographic studies based on statistical modeling of radiocarbon dates. In this paper, we explore whether the different physical impacts of the Storrega tsunami could have initiated observed regional developments in lithic technology. We have analyzed lithic assemblages from 30 carefully selected Middle and Late Mesolithic sites (dated between c. 7500 and 5000 cal BC) spread across six designated "focus areas" along the coast of western South-Norway. We identified five blade production concepts in use during the Late Mesolithic and highlight potentially significant differences in their spatial and temporal distribution. Although neither the tsunami nor the environmental stresses experienced by Mesolithic communities appear to have prompted large breaks in traditional practices, we suggest that the event marks a point in time from where specific differences and modifications in lithic technology start developing at a local scale. We argue that sudden, yet transitory events such as the Storegga tsunami, may rupture the historical contingency of social networks and communication lines resulting in changing social contexts influencing material change. [ABSTRACT FROM AUTHOR]

This article presents the results of research carried out at two previously unreported Eastern Desert Atbara River project (EDAR) Middle Stone Age (MSA) sites—EDAR 134 and EDAR 155. Luminescence dating results indicate human activity in this area during the Marine Isotope Stage 5 period (MIS 5), approximately 90 kya. Discussion concerning the affiliation of both analyzed inventories will be provided, including another MSA site from the EDAR area, where an assemblage dated to MIS 6/5e does not have technological features known from other technocomplexes in the eastern Sahara region (EDAR 135). Microscopic analysis of traces of tool use for the EDAR 155 assemblage shows the high impact of post-depositional (aeolian) processes on the state of preservation of lithic material. Sites EDAR 134 and 155 provide evidence for hominin activity during the late Pleistocene within an area only episodically accessible, due to arid conditions prevailing in the Saharan deserts. [ABSTRACT FROM AUTHOR]

Evaluating the links between South American Amerindian ontologies and the contextual study of knapped lithic technology is the main goal of this paper. To this end, we focus on a study case from eastern Catamarca province, Argentina, during the 1st millennium A.D. We identified projectile points in only one context, a rock art rock shelter (Oyola 7), while in other archaeological sites in the area, we have not recorded this type of stone tool. Drawing on ethnohistoric and ethnographic data regarding the connection between arrows and shamanic practices of illness and healing, we propose considering the agencies of these objects, as well as their intrinsic danger and their multiple possibilities of affecting beyond their traditional functional interpretation. [ABSTRACT FROM AUTHOR]

Fifty years have passed since the first systematic archaeological surveys and excavations were conducted in Lutruwita (Tasmania). Despite numerous Late Pleistocene archaeological discoveries in the southwest region, no indisputable pre‐Holocene sites have been found in eastern Tasmania. This profound difference raises questions about how Aboriginal people utilised the Lutruwita landscape; first as a projecting peninsula into the Southern Ocean and then as an island cut off by rising seas c.14000 years ago. To examine the difference between east and west further, legacy data excavated by one of us (RJ) in 1964 at the Oatlands OL1 site and stored at the Tasmanian Museum and Art Gallery (TMAG) has been analysed. The results of pXRF chemical analysis of artefact raw material, radiocarbon dating and studies of faunal remains have produced information that highlights the Holocene interaction between people in eastern Lutruwita. Despite the current lack of Late Pleistocene evidence from eastern Lutruwita, this pattern appears to be different from land use models for Late Pleistocene southwestern Lutruwita. With new information from the OL1 rock shelter site we can now contrast the Late Pleistocene hunting economics with the exceptionally well‐preserved faunal remains found in the Holocene site, OL1. [ABSTRACT FROM AUTHOR]

The bipolar technique is a flaking strategy that has been identified from 3.3 Ma until the twentieth century, with no geographical or chronological homogeneous distribution. It is represented by the intentional contact of an active percussive element against a core rested on an anvil. This tool composite has been described by some researchers as a sign of low-skill of hominins, unable to perform successfully free-hand flaking or for flaking low-quality raw materials. Based on this premise, our research focused on the following question: Are there any quantitative and qualitative differences in terms of both kinematic parameters and technical skills between knappers with different levels of expertise when flaking using the bipolar technique? To get an answer, we developed a systematic experimental program with 12 volunteer participants with different levels of expertise. Then, to assess potential quantifiable differences and to understand the mechanics of bipolar technology, we did a video motion analysis based on kinematic parameters (including position, velocity, acceleration, and kinetic energy of the hammerstone). In addition, we performed a technological analysis of the experimental lithic assemblages to assess the technological differences between knappers based on their levels of expertise. In kinematic parameters, both statistical analysis and observations from the experiment clearly show that there are differences between the levels of expertise in this technique. Intermediate knappers have been observed to apply more velocity and kinetic energy than experts and novices. Also, differences were observed in the flaking strategies. Expert knappers show a longer reduction sequence, while intermediates show shorter one. Moreover, some of the novice knappers did not even obtain a single flake. The results of our experiment stress the complexity of bipolar flaking and that previous assumptions about it might be reconsidered, especially in terms of reconsidering the negative connotations attributed to this flaking technique. [ABSTRACT FROM AUTHOR]

Archaeological investigations worldwide have focused on when and how humans permanently settled in high-altitude environments. Recent evidence from Xiada Co, Qusongguo, and Dingzhonghuzhuzi in western Tibet, where lithic artifacts and radiocarbon dates with original deposits were first accessed, provides new insights into human activities in this extreme environment during the early Holocene. This paper examines the mobility and land-use patterns of foragers in western Tibet from the perspectives of lithic analysis. Assemblages from three sites suggest homogenous technologies and raw material use, as well as potential interaction network of hunter-gatherers within the plateau during the early Holocene. It further argues that the material exponents and travel cost models of site location supported permanent occupation of the western Tibetan Plateau in this period. [ABSTRACT FROM AUTHOR]

We present a series of 12 OSL/IRSL dates that revise and complete the chronology of the important Middle (MSA) and Later Stone Age (LSA) site Umbeli Belli in KwaZulu-Natal, South Africa. These dates shift the previous radiometric ages thousands of years older than earlier measurements and play a key role in revising the cultural stratigraphy of KwaZulu-Natal. We also discuss how these dates bring the chrono- and cultural stratigraphy of southern Africa into clearer focus. The Robberg sequence of Umbeli Belli is now firmly dated to 21 ± 2 ka, whereas the preceding Early LSA assemblage dates to ~32 ka, representing one of the earliest dates for this cultural expression in the broader region. The final MSA assemblages from Layer 7 to 9 now date to between 35 ka and 40 ka, overlapping more tightly with comparable assemblages from Sibhudu, Umhlatuzana and other sites. Layer 10, which was previously also assigned to the final MSA, now dates to ~47-54 ka, placing the assemblage within the temporal range of the Late MSA. The new dates provide a good explanation for the clear differences in material culture between Layer 10 and the younger layers. We also present two new ages for the deeper horizons 11b and 12 at Umbeli Belli, dating to 76 ± 9 ka and 80 ± 9 ka, respectively. [ABSTRACT FROM AUTHOR]

Copyright of Intersecciones en Antropología is the property of Universidad Nacional del Centro de la Provincia de Buenos Aires, Facultad de Ciencias Sociales and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Lithic technological organisation within the southern Africa Early Middle Stone Age (∼315,000–80,000 years ago) has seen relatively little investigation owing to the subtly of technological change, frequent use of locally derived raw materials, and the archaeological spatio-temporal discontinuity. This has resulted in relatively limited use of explanatory models for technological variability, including mobility, provisioning, tool production, and core reduction strategies. This paper uses 2952 artefacts to test the lithic technological organisation across Marine Isotope Stage 5 units of Mertenhof Rockshelter. Here we argue that the scales and concepts currently used to approach Early Middle Stone Age technology requires reconsideration. The Mertenhof sequence exhibits high proportions of non-local raw materials with their transport reflective of tactical adjustments within relatively stable mobility, provisioning, and reduction strategies. We demonstrate that Early Middle Stone Age populations maintained a diverse array of tactical solutions across these strategic domains, offering a durable and flexible strategy that would be adapted to changing contexts.

Abstract The Aurignacian is the first European technocomplex assigned to Homo sapiens recognized across a wide geographic extent. Although archaeologists have identified marked chrono-cultural shifts within the Aurignacian mostly by examining the techno-typological variations of stone and osseous tools, unraveling the underlying processes driving these changes remains a significant scientific challenge. Scholars have, for instance, hypothesized that the Campanian Ignimbrite (CI) super-eruption and the climatic deterioration associated with the onset of Heinrich Event 4 had a substantial impact on European foraging groups. The technological shift from the Protoaurignacian to the Early Aurignacian is regarded as an archaeological manifestation of adaptation to changing environments. However, some of the most crucial regions and stratigraphic sequences for testing these scenarios have been overlooked. In this study, we delve into the high-resolution stratigraphic sequence of Grotta di Castelcivita in southern Italy. Here, the Uluzzian is followed by three Aurignacian layers, sealed by the eruptive units of the CI. Employing a comprehensive range of quantitative methods—encompassing attribute analysis, 3D model analysis, and geometric morphometrics—we demonstrate that the key technological feature commonly associated with the Early Aurignacian developed well before the deposition of the CI tephra. Our study provides thus the first direct evidence that the volcanic super-eruption played no role in this cultural process. Furthermore, we show that local paleo-environmental proxies do not correlate with the identified patterns of cultural continuity and discontinuity. Consequently, we propose alternative research paths to explore the role of demography and regional trajectories in the development of the Upper Paleolithic.

The Aurignacian is the first European technocomplex assigned to Homo sapiens recognized across a wide geographic extent. Although archaeologists have identified marked chrono-cultural shifts within the Aurignacian mostly by examining the techno-typological variations of stone and osseous tools, unraveling the underlying processes driving these changes remains a significant scientific challenge. Scholars have, for instance, hypothesized that the Campanian Ignimbrite (CI) super-eruption and the climatic deterioration associated with the onset of Heinrich Event 4 had a substantial impact on European foraging groups. The technological shift from the Protoaurignacian to the Early Aurignacian is regarded as an archaeological manifestation of adaptation to changing environments. However, some of the most crucial regions and stratigraphic sequences for testing these scenarios have been overlooked. In this study, we delve into the high-resolution stratigraphic sequence of Grotta di Castelcivita in southern Italy. Here, the Uluzzian is followed by three Aurignacian layers, sealed by the eruptive units of the CI. Employing a comprehensive range of quantitative methods—encompassing attribute analysis, 3D model analysis, and geometric morphometrics—we demonstrate that the key technological feature commonly associated with the Early Aurignacian developed well before the deposition of the CI tephra. Our study provides thus the first direct evidence that the volcanic super-eruption played no role in this cultural process. Furthermore, we show that local paleo-environmental proxies do not correlate with the identified patterns of cultural continuity and discontinuity. Consequently, we propose alternative research paths to explore the role of demography and regional trajectories in the development of the Upper Paleolithic. [ABSTRACT FROM AUTHOR]

We describe an analysis of the flaked stone tools recovered from households in the Postclassic central Mexican city of Calixtlahuaca (a.d. 1130–1530). Most artifacts are obsidian and represent the blade-core technology, but biface and bipolar artifacts are also represented. Even though household residents were involved in limited biface and bipolar reduction, it appears that the city did not have any resident blade producers. This finding is at odds with the views of many archaeologists, who tend to associate craft production with the emergence of complex Mesoamerican urban centers. We examine the technologies from temporally distinct Calixtlahuacan household assemblages. We discuss why the quantity and quality artifacts associated with blade production are not consistent with resident blade making in the city. Finally, we examine four models for blade provisioning: (1) whole-blade trade, (2) processed-blade trade, (3) long-distance itinerant craftsmen, and (4) local, hinterland-based craftsmen. Evaluating how the Calixtlahuacans got their flaked stone tools has important implications for the comparative understanding of the organization and scale of economic provisioning systems in Postclassic central Mexico. This analysis supports new inferences about the nature of commercial networks that supplied the Toluca Valley prior to the arrival of the Spanish in the sixteenth century. [ABSTRACT FROM AUTHOR]

The Mumba rockshelter, located in the northwest of Lake Eyasi is key to understanding the Stone Age in East Africa. The stratigraphy of the site spans the last 130 ka BP and comprises levels from the Middle Stone Age, the Later Stone Age, the Pastoral Neolithic, and the Iron Age. In terms of the Middle Stone Age (MSA), Mumba has helped to define two lithic industries: Sanzako (130 ka BP) and Kisele (90–50 Ka BP) that characterize this techno-complex in northern Tanzania. The Sanzako industry was defined based on level VI-B at Mumba, which was excavated in 1938 by Köhl-Larssen. Here we present the study of the lithic assemblage excavated by Mehlman between 1977 and 1981. Mehlman subdivided this unit into three sublevels (Lower, Middle, and Upper), all of which remained unanalyzed and therefore, unpublished. The main features of the lithic assemblages found in the three sublevels are the presence of discoid, Levallois, and bipolar knapping methods. Additionally, the retouched tools are mainly sidescrapers, denticulates, and notches. This recent research enables us to understand the Sanzako industry in more detail, as well as its nature within the chronocultural framework of the MSA in northern Tanzania. [ABSTRACT FROM AUTHOR]

Major changes in lithic technologies are often explained by either migration or crisis. Here we argue that continuity and minor adjustments in lithic production can tell equally dramatic tales of altered social situations. We base our interpretations on identified lithic blade production concepts and raw materials at 30 sites dating 7500–5000BC, i.e. from before and after the massive Storegga tsunami hit the coast of western South-Norway around 6150BC. Regional continuation, but also local variations in lithic production are interpreted inspired by a machine-oriented ontological framework. The tsunami disrupts the environment, society and its lithic traditions are affected. Although no immediate major breaks are observed, sometime after the tsunami, societies or lithic production as ‘machines’ in separate regions had begun to hum to different tunes. We suggest that variation in tsunami impact had created differing local social contexts which in turn pushed the lithic traditions down diverging paths. [ABSTRACT FROM AUTHOR]

Copyright of Revista del Museo de Antropología is the property of Museo de Antropologia - IDACOR and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The pressure knapping technique develops circa 25,000 cal BP in Northeast Asia and excels at producing highly standardized microblades. Microblade pressure knapping spreads throughout most of Northeast Asia up to the Russian Arctic, and Alaska, in areas where the human presence was unknown. Swan Point CZ4b is the earliest uncontested evidence of human occupation of Alaska, at around 14,000 cal BP. It yields a pressure microblade component produced with the Yubetsu method, which is widespread in Northeast Asia during the Late Glacial period. Through the techno-functional analysis of 634 lithic pieces from this site, this study seeks to identify the techno-economical purposes for which the Yubetsu method was implemented. Data show that the microblade production system is related to an economy based on the planning of future needs, which is visible through blanks standardization, their overproduction, their functional versatility, and the segmentation of part of the chaîne opératoire. This expresses the efficiency and economic value of the microblade production system. The flexible use of pressure microblades identified at Swan Point CZ4b is also found in Japan, Korea, Kamchatka, and the North Baikal region, suggesting that their modes of use accompany the spread of early microblade pressure knapping over an immense territory across Beringia. [ABSTRACT FROM AUTHOR]

A growing number of authors have discussed the role of climate change in periods of important biological and cultural transition along the hominin lineage. This paper establishes a biocultural framework elucidating human behavioural adaptations during the African Early and Middle Stone Age, centred on three crucial dimensions of hunter-gatherer adaptation: mobility, social network dynamics, and technology. We contend that landscape properties, specifically resource diversity and seasonal to inter-annual resource variability, can be used to model the specific responses of hominin groups to climate change over time, based on their awareness of these properties. Specifically, we focus on hominin technological generalisation and specialisation, meaning the extent to which there is a high degree of specificity (or fit) between final tool form and the task(s) in which the tool is deployed.In this regard, we argue that the archaeological record reveals punctuated and discontinuous specialisation during certain phases of the Early Stone Age driven by landscape predictability. These periods encourage the expression of relevant innovations and stepwise increases in technological complexity. While some of them become lost to demographic or cultural stochasticity, others end up forming the basis for a standardisation of generalised forms within the context of unexpected climatic deterioration. This is highlighted by the late Acheulean: following a period of greater generalisation in the late Early Pleistocene correlating with repeated and severe orbitally-forced periods of aridity, smaller biface forms become more common (or absent) and regional experimentation with prepared-core technology in Eastern Africa takes place in the context of a return to more humid and stable climatic conditions. The onset of more arid and variable climates associated with the emergence of the Middle Stone Age led to the continental expansion of the prepared-core technological substrate underpinning generalised assemblages. The cycle continues in the Middle Stone Age with a return to climatic stability in the Late Pleistocene and subsequent regional diversification of this techno-complex, in which hominins responded with greater toolkit specialisation in a number of different ways. In this context, we support the existence of a cyclical and non-linear relationship between environmental adaptation and cognitive evolution, as part of a wider biocultural feedback loop, which contributes to explain the evolutionary roots of our “generalist specialist” niche.

We present a series of 12 OSL/IRSL dates that revise and complete the chronology of the important Middle (MSA) and Later Stone Age (LSA) site Umbeli Belli in KwaZulu-Natal, South Africa. These dates shift the previous radiometric ages thousands of years older than earlier measurements and play a key role in revising the cultural stratigraphy of KwaZulu-Natal. We also discuss how these dates bring the chrono- and cultural stratigraphy of southern Africa into clearer focus. The Robberg sequence of Umbeli Belli is now firmly dated to 21 ± 2 ka, whereas the preceding Early LSA assemblage dates to ~32 ka, representing one of the earliest dates for this cultural expression in the broader region. The final MSA assemblages from Layer 7 to 9 now date to between 35 ka and 40 ka, overlapping more tightly with comparable assemblages from Sibhudu, Umhlatuzana and other sites. Layer 10, which was previously also assigned to the final MSA, now dates to ~47–54 ka, placing the assemblage within the temporal range of the Late MSA. The new dates provide a good explanation for the clear differences in material culture between Layer 10 and the younger layers. We also present two new ages for the deeper horizons 11b and 12 at Umbeli Belli, dating to 76 ± 9 ka and 80 ± 9 ka, respectively. Significance: • Revised and new age estimates are given for the Middle and Later Stone Age sequence of Umbeli Belli. • These age changes allow new comparisons with nearby prehistoric sites. • They change our view of the regional variability of technologies and cultures between ca. 80 and 20 ka on the east coast of South Africa.

Sharbithat 10 (SHA-10) was discovered in 2017 during the first extensive survey of the northern part of the Dhofar region. Located on a vast mesa surrounded by wadi deltaic branches and abundant sources of flint, SHA-10 is characterized by flint scatters, dwellings, and cairns. Initial test trenches revealed a single period stratification sequence, highlighting a rich marine faunal composition and intense flintknapping activity. The fishing equipment, typical of coastal sites from this period, accompanies a distinctive lithic industry comprising blades, backed pieces, and tanged points. Through the study of technological processes leading to the manufacture of these artefacts, analysis of the points’ morphological variability, and examination of the prevalence of backed bladelets, new hypotheses regarding coastal subsistence strategies and chronological issues have emerged. However, the potential co-occurrence of different facies complicates a chronological definition which can be partly clarified by radiocarbon data results. In this communication, we present a preliminary study of this unique assemblage, discuss its chrono-typological implications, and explore their significance within the framework of South Arabian prehistory.

Eastern Africa maintains a key position in debates surrounding the emergence of Homo sapiens across Africa. Extensive research in the region has revealed a rich fossil record in association with a 'generic' but variable Middle Stone Age (MSA) material culture, providing an important laboratory for testing hypotheses about the behavioural evolution of our species. For example, multiple archaeological studies of the eastern African MSA note a link between the distribution and density of sites, archaeological diversity and environmental conditions, with ecology and demography often cited as key drivers of cultural evolution. This article formulates new hypotheses using theoretical models of complex fitness landscapes of evolution and reviews the archaeological and climatic records of Middle-late Pleistocene eastern Africa in the light of these ideas. It proposes that evidence from eastern Africa implicates much of the region as a refugial zone within Pleistocene Africa, providing consistently suitable conditions for survival that were characterised by high and changing biodiversity, facilitating population growth and interconnectivity as well as material culture diversification. Interactions between different evolutionary processes likely resulted in the complex cultural mosaic observed across Africa, including the appearance of 'specific' innovations against a backdrop of more 'generic' MSA elements. [ABSTRACT FROM AUTHOR]

The terminal Pleistocene witnessed significant paleoclimatic changes that influenced the adaptive behavior of human populations. Situated in the tropical-subtropical zone of Southwest China, a newly excavated cave site, Fodongdi, revealed evidence for substantive changes in technology between 18.37 to 13.85 cal ka BP. Here, we present the results of a technological analysis on lithic assemblage formation across three main sequential phases at Fodongdi Cave. Diachronic changes in lithic technology document the co-existence of diverse reduction techniques and toolkits, corresponding with climatic fluctuations over a five-thousand-year period. [ABSTRACT FROM AUTHOR]

Copyright of Documenta Praehistorica is the property of Documenta Praehistorica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aims to evaluate the functionality of a sample of lithic tools from a multiproxy perspective. The artifacts come from a mid-Holocene hunter-gatherers’ occupation of the La Mesada site in Patagonia. The perspective involves the examination of use-wear traces, hafting wear, and organic micro-residues. The experimental program that supports this perspective is presented. Use-wear traces and organic residues were recognized in the distal portion of the archaeological artifacts. Meanwhile, some tools, in the proximal and middle portion, present alterations attributable to hafting in combination with animal and vegetable residues. The production sequence of a particular artifact design is discussed, with distinctive aspects regarding regional trends. Practices related to plant management were identified that allow the evaluation of mobility circuits and interchange mechanisms of these societies.

Archaeological investigations worldwide have focused on when and how humans permanently settled in high-altitude environments. Recent evidence from Xiada Co, Qusongguo, and Dingzhonghuzhuzi in western Tibet, where lithic artifacts and radiocarbon dates with original deposits were first accessed, provides new insights into human activities in this extreme environment during the early Holocene. This paper examines the mobility and land-use patterns of foragers in western Tibet from the perspectives of lithic analysis. Assemblages from three sites suggest homogenous technologies and raw material use, as well as potential interaction network of hunter-gatherers within the plateau during the early Holocene. It further argues that the material exponents and travel cost models of site location supported permanent occupation of the western Tibetan Plateau in this period.

The authors studied 36 obsidian-tipped spears in the Oceania collection of the Museum of Ethnography in Budapest. In addition to describing the objects from the Admiralty Islands collected before 1897, the paper provides a summary of the related ethnographic information, including the technological and technical details of spear point making and the characterisation of the obsidian raw material used. The blades used for making the obsidian points presented in this study showed no sign of standardisation (an indicator of advanced blade technology) in the spear point-making process. According to 19th-century ethnographic sources, the functional part of the points was the most important, and much time and effort were invested in ensuring that the blades were effective weapons. Later, as a sign of decline, primary production of obsidian blades ceased, and manufacturers started scavenging old artefacts and utilising waste and by-products. As a result, the blades decreased in size and became more irregular, and an increasingly large number included parts of the cortex, the crust of obsidian. After 1911, the relative importance of decoration increased, and the type became more standardised. The irregular shape of the spear points presented in the study and the thin, weak shafts with an awkward curvature raise questions about whether the spears were actual weapons. At the same time, the artistic decoration of the mounting sockets and ethnographic parallels suggest that the pieces in the collection were likely status objects instead.

Between 22ka and 9ka ago, after the Last Glacial Maximum (LGM) and during the transition to the Holocene, mobile hunter-gatherer populations, differentiated by their stone tool assemblages, periodically dispersed and contracted across Europe. It is well understood that climate played an important role in human distributions and population sizes during the post-LGM Late Pleistocene and Early Holocene, but the question remains as to whether increasing population sizes drove early human dispersal. Here, using a spatiotemporal species distribution model to infer the fundamental and potential human climatic niche space of Late Upper Paleolithic, Final Paleolithic and Early Mesolithic Europe, and hypotheses derived from the Ideal Distribution Model, we test i) how changes in climate affected the size and extent of the projected potential human niche space, ii) for effects of changes in size of projected potential niche on regional human population sizes, iii) whether increasing human population sizes drove human dispersal into less climatically suitable habitats, and iv) whether populations associated with different high-order material culture groupings (macro-level technocomplexes) occupied different climatic spaces. We find that changes in climate correlate strongly with the size and extent of the projected potential human niche space, that increases in the projected human niche space correlate with increases in human population, that human population size is just beginning to become large enough to influence land use and dispersal patterns at the Pleistocene-Holocene transition, and that archaeological technocultural entities overlap in their fundamental climatic niche space. This overlap implies that changing tools forms cannot readily been seen as reflecting adaptations to changing climates. • Changes in climate correlate with the size and extent of the human projected potential niche space. • Increases in the geographic size of the projected potential niche space correlate with increases in human population size. • Larger human population sizes push people to occupy less suitable habitats. • Climate can impose constraints on human population size, limiting the effects of human population size on dispersal. [ABSTRACT FROM AUTHOR]

In stone artefact studies, researchers often rely on qualitative classifications to describe flake scar arrangements on cores. While this approach provides a broad overview of core reduction patterns, its application can be ambiguous due to the three-dimensional complexities of core geometry and the subjective nature of qualitative classifications, making it challenging to objectively compare flake scar patterning across different analytical settings. In this study, we present a new approach to quantify one aspect of flake scar arrangement on cores: the three-dimensional orientation of core scar negatives. Using standardised digital and experimentally flintknapped cores, we demonstrate that statistical techniques from fabric analysis can quantitatively characterise the scar orientation profile of cores. Importantly, this method is able to reveal variations in the flake scar arrangements of informal cores, such as multiplatform cores. When applied to a sample of multiplatform cores from the Homo floresiensis type-site of Liang Bua in Indonesia, we identify differences in flake scar orientation between cores made by Homo floresiensis and those manufactured by modern humans who utilised the site after the disappearance of the extinct hominin. This finding suggests a possible divergence in stone knapping practices between the two hominin taxa at Liang Bua. Overall, our research provides a new quantitative approach to gain new insights into hominin technological behaviour through stone artefact analysis. It also highlights the potential of 3D analysis for advancing the field of archaeological lithic research. • A new method for quantifying the 3D orientation of flake scars on cores. • Major core types can be differentiated on the basis of flake scar orientation data. • Effective in characterising scar pattern variability among multiplatform cores. • Detected scar orientation differences at the Homo floresiensis site of Liang Bua. [ABSTRACT FROM AUTHOR]

The Homa Peninsula, in southwestern Kenya, continues to yield insights into Oldowan hominin landscape behaviors. The Late Pliocene locality of Nyayanga (∼3–2.6 Ma) preserves some of the oldest Oldowan tools. At the Early Pleistocene locality of Kanjera South (∼2 Ma) toolmakers procured a diversity of raw materials from over 10 km away and strategically reduced them in a grassland-dominated ecosystem. Here, we report findings from Sare-Abururu, a younger (∼1.7 Ma) Oldowan locality approximately 12 km southeast of Kanjera South and 18 km east of Nyayanga. Sare-Abururu has yielded 1754 artifacts in relatively undisturbed low-energy silts and sands. Stable isotopic analysis of pedogenic carbonates suggests that hominin activities were carried out in a grassland-dominated setting with similar vegetation structure as documented at Kanjera South. The composition of a nearby paleo-conglomerate indicates that high-quality stone raw materials were locally abundant. Toolmakers at Sare-Abururu produced angular fragments from quartz pebbles, representing a considerable contrast to the strategies used to reduce high quality raw materials at Kanjera South. Although lithic reduction at Sare-Abururu was technologically simple, toolmakers proficiently produced cutting edges, made few mistakes and exhibited a mastery of platform management, demonstrating that expedient technical strategies do not necessarily indicate a lack of skill or suitable raw materials. Lithic procurement and reduction patterns on the Homa Peninsula appear to reflect variation in local resource contexts rather than large-scale evolutionary changes in mobility, energy budget, or toolmaker cognition. [ABSTRACT FROM AUTHOR]

A key inquiry in Pleistocene human coastal adaptations asks whether coastlines were productive littoral patches that were consistently utilized over time or did fluctuating sea levels make them marginally productive patches that only supplemented terrestrially oriented foraging. Investigating this issue is challenging because rising glacio-eustatic sea levels submerged most evidence of Pleistocene coastal occupation. We address the question directly by integrating this analysis of open-air lithic assemblages with previously reported cave excavations on Barrow and adjacent islands in Western Australia. Well-dated, stratified cave deposits bracket occupation of Barrow Island from c. 50 ka to 7 ka, when rising sea levels severed pedestrian access to the mainland. Consequently, the open-air sites are a solely Pleistocene to Early Holocene record of land-use when the extensive North West Shelf was as a vast coastal plain. These assemblages offer evidence of human interaction with Pleistocene sea-level change that were undetectable from cave deposits alone. While local calcarenite dominates cave lithic assemblages, it is rare among surface artifacts that are predominately lithologies that originate either on the mainland, or from now-drowned sources. The distribution of surface materials is statistically patterned across the island reflecting broader land-use patterns across the coastal plain. Expedient flake and core tools made mostly of igneous material are prevalent on sites in the north, whereas curated food processing and fabrication tools, and sedimentary lithologies, are more common in the south. While this study bolsters findings from the cave excavations that early Aboriginal people regularly moved across the coastal plain targeting coastal resources, it sheds light on their access to inland resources and suggests they were linked to the continental mainland by mobility, social networks, and exchange. Additionally, this research links contemporary Aboriginal communities from northwest Australia to the continental islands of the North West Shelf. The Barrow Island Archaeology project received support from the Buurabalayji Thalanyji Aboriginal Corporation, involving Thalanyji Knowledge Holders and elders: Glenys Hayes, Anne Hayes, Robyn Davison, and Jane Hyland. • Barrow Island lithic scatters date solely to the Pleistocene – Early Holocene. • Lithological sources differ dramatically from artifacts in coeval cave occupations. • Analysis suggests three distinct lithic provisioning strategies. • Functional patterning may reflect temporal changes in land use. • Pleistocene coastal adaptations spanned vast, inundated coastal plains of Sahul. [ABSTRACT FROM AUTHOR]

The purpose of this paper is to contribute to the body of knowledge on the first human occupations predating MIS 21 in the Atapuerca karst system. These occupations are described in terms of their ecological, cultural and technological context based on the Sima del Elefante and Gran Dolina sites. This paper focuses on the lower units of these sedimentary infills, specifically Unit TE9 of Sima del Elefante and Unit TD4 of Gran Dolina. In addition, evidence of the earliest human settlements in Europe is reviewed and hypotheses about the dynamics and intensity of that settlement are proposed. [ABSTRACT FROM AUTHOR]

One of the methods of analysing the manufacturing process of lithic tools is by "reading" the scars of removals visible on the surface of cores or bifaces. The paper aims to review the limitations of this approach, by answering the question as to how much information from the original knapping process is still preserved in the cores and bifaces. To quantify the information loss we used experimentally knapped pieces, that we then refitted to check which removals are still visible on the surface of the analysed forms. We tested different measures of information loss in the context of removals and sequences of removals, but also the chronological relationship between sequences i.e. the number of linear extensions and missing nearest connections. On average, 39.9% of the original removals and 54.1% of the sequences of removals are preserved on the surface, but only 14.1% of the original relationships between sequences can be observed. Finally, we used simple machine learning to find an algorithm for estimating the loss of the nearest chronological relationships between sequences when no refits are available. Due to the extremely high information loss for the linear order of the knapping process we: a) propose to abandon these elements of the diacritic approach which aim to reconstruct the rhythms and schemes of knapping; b) evaluate the quality of the reconstructed knapping scheme (partial order) prior to further comparative analyses. Here we propose an algorithm to estimate the number of missing connections to test the quality of the knapping process while using diacritic schemes. • The information loss refers to detached removals and the chronological relation between them. • 39.9% of detached removals are preserved on the surface of bifaces or cores. • 14.1% of the chronological relationships between sequences of removals can be observed. • The information loss during the knapping process is substantial. • It influences the chaine operatoire analyses based on tools or cores solely. [ABSTRACT FROM AUTHOR]