Stone Tools Research Articles

Neolithic stone tool and shell bead production from Maṣīrah and Al‐Ḥallāniyah islands (Oman)

AbstractIn Oman, many coastal sites dated to the Neolithic have yielded material culture related to ornament manufacture. These sites are the remnants of fishermen occupations, developing an economy mainly based on maritime and mangrove resources. The Omani islands of Maṣīrah and Al‐Ḥallāniyah are both situated in the Arabian Sea. Today, Maṣīrah is located about 20 km from the continent, while Al‐Ḥallāniyah is part of the Khurīyā Murīyā archipelago off the southern coast of Oman. On Maṣīrah, workshops have been discovered in Neolithic shell middens, revealing the work of stone and Spondylus sp. shells for bead production, using lithic tools. Separated by approximately 400 km from Maṣīrah, Al‐Ḥallāniyah yielded several Neolithic sites with similar evidence for shell bead production. The main lithic tools discovered are micro‐drills, pièces esquillées (splintered pieces) made of local chert, and multitasking tools made of stone, used as anvils, hammerstone and/or polishing stone. Most of the micro‐drills are made from bladelets either with sharped edges or with steep edges and testify to predetermined knapping operations. However, others created on undifferentiated flakes appear to be more opportunistic (or expedient). Micro‐drills of the Maṣīrah and Al‐Ḥallāniyah types seem to be quite new to the Neolithic toolkit of coastal Oman. Pièces esquillées demonstrate the use of bipolar flaking (performed on an anvil) but functional questions remain. These could be cores, but also chisels used between a hammer and a material (shell) placed on an anvil. Stone tools show marks that are characteristic of use as hammers, anvils and as tools used to polish the beads after perforation.

The Stone, the Deer, and the Mountain: Lower Paleolithic Scrapers and Early Human Perceptions of the Cosmos

AbstractEvidence from the Levantine Late Lower Paleolithic sites of Jaljulia and Qesem Cave suggests that Quina scrapers, an innovation in a category of tools used mostly for butchery, emerged with changes in hunting practices. Quina scrapers were often made of non-local flint from the Samarian highlands, a home range of fallow deer populations throughout the ages. The predominance of fallow deer in the human diet following the disappearance of megafauna made scrapers key tools in human subsistence. Particular stone tools and particular prey animals, thus, became embedded in an array of practical, cosmological, and ontological conceptions whose origin we trace back to Paleolithic times. The mountains of Samaria, a source of both animals and stone under discussion, were part of this nexus. We present archaeological and ethnographic evidence of the practical and perceptual bonds between Paleolithic humans, animals, stones, and the landscape they shared.

Ochre-based compound adhesives at the Mousterian type-site document complex cognition and high investment.

Ancient adhesives used in multicomponent tools may be among our best material evidences of cultural evolution and cognitive processes in early humans. African Homo sapiens is known to have made compound adhesives from naturally sticky substances and ochre, a technical behavior proposed to mark the advent of elaborate cognitive processes in our species. Foragers of the European Middle Paleolithic also used glues, but evidence of ochre-based compound adhesives is unknown. Here, we present evidence of this kind. Bitumen was mixed with high loads of goethite ochre to make compound adhesives at the type-site of the Mousterian, Le Moustier (France). Ochre loads were so high that they lowered the adhesive's performance in classical hafting situations where stone implements are glued to handles. However, when used as handheld grips on cutting or scraping tools, a behavior known from Neanderthals, high-ochre adhesives present a real benefit, improving their solidity and rigidity. Our findings help understand the implications of Pleistocene adhesive making.

Holocene peopling and sea-level changes along the northern coast of the Arabian Sea (Pakistan)

Surveys carried out in the provinces of Las Bela and Lower Sindh (Pakistan) have led to the discovery of many concentrations of knapped stone artefacts associated with mangrove and sea shells. The most important group of sites has been discovered along the shores of Lake Siranda (Balochistan) and on the limestone terraces that rise from the Indus Plain in Lower Sindh. The radiocarbon dates obtained from the Lake Siranda sites have shown that the ancient lagoon was seasonally settled between the last two centuries of the 8th and the end of the 5th millennium uncal BP that is from the beginning of the Neolithic to the Bronze Age. Although more research is needed, we now know the important role played by the coastal zones of Las Bela and Lower Sindh in the Holocene archaeology of the Arabian Sea, the only region of the northern coastline that has provided evidence of Neolithic and Chalcolithic settlement. The Neolithic knapped stones discovered during the surveys consist of bladelet artefacts and geometric microliths made from local cherts, while the Chalcolithic Amri Culture implements are obtained from exotic flint. Since the beginning of the Holocene the coastal zone has been affected by dramatic events among which are sea-level rise, tectonic activity, subsidence, and the advance of the Indus Delta. The present landscape shaped around the end of the Bronze Age, when arid conditions established and the Indus Civilisation declined. Unfortunately many of the coastal sites are in danger or have been destroyed by industrial development.

Comparative study: enhancing legibility of ancient Indian script images from diverse stone background structures using 34 different pre-processing methods

In recent times, there has been a proactive effort by various institutions and organizations to preserve historic manuscripts as repositories of traditional knowledge and cultural heritage. Leveraging digital media and emerging technologies has proven to be an efficient way to safeguard these invaluable documents. Such technologies not only facilitate the extraction of knowledge from historic manuscripts but also hold promise for global applications. However, transforming inscribed stone artifacts into binary formats presents significant challenges due to angle distortion, subtle differences between foreground and background, background noise, variations in text size, and related issues. A pivotal aspect of effective image processing in preserving the rich information and wisdom encoded in stone inscriptions lies in employing appropriate pre-processing methods and techniques. This research paper places a special focus on elucidating various preprocessing techniques, encompassing resizing, grayscale conversion, enhancement of brightness and contrast, smoothening, noise removal, morphological operations, and thresholding. To comprehensively assess these techniques, we undertake a study involving stone inscription images extracted from the Tanjore Brihadeeswar Temple, dating back to the eleventh century during the reign of Raja Raja Chola. This choice is informed by the manifold challenges associated with image correction, such as distortion and blurring. We undertake an evaluation encompassing a diverse array of stone background structures, including types like flawless-bright-moderately legible, dark-illegible, flawless-bright-illegible, flawless-dull, flawless-irregular-moderate, highly impaired-dark-legible, highly impaired-irregular-illegible, impaired-dark-moderate, impaired-dull-moderately legible, impaired-dusky dark-moderate, and very impaired-dusky dark-legible. Subsequently, the processed outputs are subjected to character recognition and information extraction, with a focus on comparing the outcomes of various pre-processing methods, including binarization and grayscale conversion. This study seeks to contribute insights into the most effective pre-processing strategies for enhancing the legibility and preservation of ancient Indian script images etched onto diverse stone background structures.

Fiber-Optic Sensors for Online Detection of Corrosion Degree of Stone Artifacts

Fiber-Optic Sensors for Online Detection of Corrosion Degree of Stone Artifacts

Delayed increase in stone tool cutting-edge productivity at the Middle-Upper Paleolithic transition in southern Jordan

Although the lithic cutting-edge productivity has long been recognized as a quantifiable aspect of prehistoric human technological evolution, there remains uncertainty how the productivity changed during the Middle-to-Upper Paleolithic transition. Here we present the cutting-edge productivity of eight lithic assemblages in the eastern Mediterranean region that represent a chrono-cultural sequence including the Late Middle Paleolithic, Initial Upper Paleolithic, the Early Upper Paleolithic, and the Epipaleolithic. The results show that a major increase in the cutting-edge productivity does not coincide with the conventional Middle-Upper Paleolithic boundary characterized by the increase in blades in the Initial Upper Paleolithic, but it occurs later in association with the development of bladelet technology in the Early Upper Paleolithic. Given increasing discussions on the complexity of Middle-Upper Paleolithic cultural changes, it may be fruitful to have a long-term perspective and employ consistent criteria for diachronic comparisons to make objective assessment of how cultural changes proceeded across conventional chrono-cultural boundaries.

In Vitro Viability Tests of New Ecofriendly Nanosystems Incorporating Essential Oils for Long-Lasting Conservation of Stone Artworks.

The study explores the application of natural biocides (oregano essential oil and eugenol, directly applied in solutions or encapsulated within silica nanocapsules) for safeguarding stone cultural heritage from biodeterioration, using green algae (Chlorococcum sp.) and cyanobacteria (Leptolyngbya sp.) as common pioneer biodeteriogens. Core-shell nanocontainers were built for a controlled release of microbicidal agents, a safe application of chemicals and a prolonged efficacy. The qualitative and quantitative evaluations of biocide efficiency at different doses were periodically performed in vitro, after six scheduled intervals of time (until 100 days). The release kinetics of composite biocide-embedding silica nanocapsules were characterized by the UV-Vis spectroscopy technique. Data showed both promising potential and some limitations. The comparative tests of different biocidal systems shed light on their variable efficacy against microorganisms, highlighting how encapsulation influences the release dynamics and the overall effectiveness. Both the essential oils showed a potential efficacy in protective antifouling coatings for stone artifacts. Ensuring compatibility with materials, understanding their differences in biocidal activity and their release rates becomes essential in tailoring gel, microemulsion or coating products for direct on-site application.

Recent Advances in the Application of Metal Oxide Nanomaterials for the Conservation of Stone Artefacts, Ecotoxicological Impact and Preventive Measures

Due to the ongoing threat of degradation of artefacts and monuments, the conservation of cultural heritage items has been gaining prominence on the global scale. Thus, finding suitable approaches that can preserve these materials while keeping their natural aspect of is crucial. In particular, preventive conservation is an approach that aims to control deterioration before it happens in order to decrease the need for the intervention. Several techniques have been developed in this context. Notably, the application of coatings made of metal oxide nanomaterials dispersed in polymer matrix can be effectively address stone heritage deterioration issues. In particular, metal oxide nanomaterials (TiO2, ZnO, CuO, and MgO) with self-cleaning and antimicrobial activity have been considered as possible cultural heritage conservative materials. Metal oxide nanomaterials have been used to strengthen heritage items in several studies. This review seeks to update the knowledge of different kinds of metal oxide nanomaterials, especially nanoparticles and nanocomposites, that have been employed in the preservation and consolidation of heritage items over the last 10 years. Notably, the transport of nanomaterials in diverse environments is undoubtedly not well understood. Therefore, controlling their effects on various neighbouring non-target organisms and ecological processes is crucial.

On information, entropy, and early stone tools

Humans affect the biosphere by producing entropy as living beings –as explained by Schröedinger [What is Life? The physical aspect of the living cell (Cambridge University Press, New York, 1992)] – but mostly as a consequence of our ever increasing economic interventions. However, humans also create new forms and arrangements of matter. Is it possible that they carry less entropy than equivalent object subject to natural forces? Art and tech works tell us something, thus carry information. The connection between probability and information was introduced by Shannon 75 years ago [Bell Syst. Tech. J. 27, 379–423 (1948)]. In this work we calculate the probability that a stone tool could have been constructed by random, natural causes. We do so by considering the earliest tools created by our hominin ancestors, the stone tools of the Paleolithic. By analysing a sample of tools, we show that they are highly unlikely constructs by random means, and that therefore carry a great deal of information, as generations of archaeologists and anthropologists have eloquently exhibited. Further, we quantify this information, and following Shannon, we ascribe an entropy to the stone tools. We thus find that the stone tool carries less entropy than a stone hit by dispersed blows. This work presents a first simplified approach to these important issues.

The Contribution of 2D and 3D Geometric Morphometrics to Lithic Taxonomies: Testing Discrete Categories of Backed Flakes from Recurrent Centripetal Core Reduction

AbstractPaleolithic lithic assemblages are usually dominated by flakes and display a high degree of morphological variability. When analyzing Paleolithic lithic assemblages, it is common to classify flakes into categories based on their morphological and technological features, which are linked to the position of the flake in the reduction sequence and how removals are organized in a given production method. For the analysis of Middle Paleolithic lithic assemblages, two categories of flakes are commonly identified: core–edge flakes and pseudo-Levallois points. A third type, core–edge flakes with a limited back, is also commonly found in the archaeological literature, providing an alternative category whose definition does not match the two previous types but shares many of their morphological and technological features. The present study addresses whether these three flakes constitute discrete categories based on their morphological and technological attributes. 2D and 3D geometric morphometrics are employed on an experimental set composed of the three categories of flakes to quantify morphological variation. Machine learning models and principal components biplots are used to test the discreteness of the categories. The results indicate that geometric morphometrics succeed in capturing the morphological and technological features that characterize each type of product. Pseudo-Levallois points have the highest discreteness of the three technological products, and while some degree of mixture exists between core edge flakes and core edge flakes with a limited back, they are also highly distinguishable. We conclude that the three categories are discrete and can be employed in technological lists of products for the analysis of lithic assemblages and that geometric morphometrics is useful for testing for the validity of categories. When testing these technological categories, we stress the need for well-defined and shared lithic analytical units to correctly identify and interpret the technical steps and decisions made by prehistoric knappers and to properly compare similarities and differences between stone tool assemblages. These are key aspects for current research in which open datasets are becoming more and more common and used to build interpretative techno-cultural models on large geographical scales. Now more than ever, lithic specialists are aware of the need to overcome differences in taxonomies between different school traditions.

Experimental Study on Surface Deterioration Disease of Stone Artifacts Based on Infrared Thermography

Experimental Study on Surface Deterioration Disease of Stone Artifacts Based on Infrared Thermography

Early human occupation of Australia’s eastern seaboard

Secure archaeological evidence for human occupation on the eastern seaboard of Australia before ~ 25,000 years ago has proven elusive. This has prompted some researchers to argue that the coastal margins remained uninhabited prior to 25 ka. Here we show evidence for human occupation beginning between 30 ± 6 and 49 ± 8 ka at Wallen Wallen Creek (WWC), and at Middle Canalpin Creek (MCA20) between 38 ± 8 and 41 ± 8 ka. Both sites are located on the western side of Minjerribah (North Stradbroke Island), the second largest sand island in the world, isolated by rising sea levels in the early Holocene. The earliest occupation phase at both sites consists of charcoal and heavily retouched stone artefacts made from exotic raw materials. Heat-treatment of imported silcrete artefacts first appeared in sediment dated to ~ 30,000 years ago, making these amongst Australia’s oldest dated heat-treated artefacts. An early human presence on Minjerribah is further suggested by palaeoenvironmental records of anthropogenic burning beginning by 45,000 years ago. These new chronologies from sites on a remnant portion of the continental margin confirm early human occupation along Sahul’s now-drowned eastern continental shelf.

청동기시대 송국리문화기 입목수혈에 대한 새로운 접근

It is estimated that as relative importance of agriculture increased during bronze age, agricultural rituals became active. Finding empirical evidence is very difficult but Lee Jongcheol(2015;2018:2021) not only discovered various ritual elements based on tree pole pit in large settlements but also demonstrated origination of appearance of Korean totem pole during prehistoric-primitive age based on archaelogical data.
 However, in discussion about ritual surrounding tree pole pit, cases of Jinan Yeouigog site and Gimhae Yulhari site played the most leading role and thus it was necessary to figure out real intention. Actually, in cases of above both two sites, one tree pole pit was found but it seems that such tree pole pit is a facility attached to graveyard rather than medium connecting different area in settlement. In addition, when examining several similar cases in Daegu region, role of guiding boundary of graveyard and order of construction of graves seemed clearer. In big tree ritual which Lee Jongcheol argued, case that two tree pole pits are found together like the case of Daegu Dongcheondong site seems more dependable. Even the same tree pole pits differ in their roles depending on their location.
 The author of this paper pointed out that existing opinions which considered big tree rituals and Korean totem poles as separate origin and facility are problematic and shape of birds which is the most important element was embodied as the beak-shaped stone tool from the first period of Bronze Age. Big tree ritual and Korean totem pole are meaningful as inseparable heritage of agricultural culture during Bronze Age.

Provenance of Neolithic Stone Artefacts through Minimally Invasive or Absolutely Non-Destructive Petroarchaeometric Investigations: Some Cases from Calabria (Southern Italy)

In the present work, more than one hundred and thirty lithic artefacts rediscovered in several archaeological sites dating from the Upper Palaeolithic to the Middle Ages from Calabria (Southern Italy) were petroarchaeometrically characterised through minimally invasive techniques. In more detail, 110 specimens were found in the Grotta della Monaca site (Sant’Agata di Esaro), and the other 23 belong to a collection kept in the Museo Nazionale Preistorico ed Etnografico “Luigi Pigorini” (Roma), coming from several localities (Longobucco, Spezzano della Sila, Cicala, Gimigliano, Roccaforte del Greco, and Bova). For preservation needs, 2 small axes in polished stone and 2 obsidians collected from Grotta della Monaca were analysed by absolutely non-destructive techniques. Optical and electron microscopic investigations, sometimes integrated with wavelength-dispersive X-ray fluorescence spectroscopy and X-ray diffraction spectrometry, allowed us to ascertain that the source area of all the lithic tools was in Calabria, except for obsidians, which come from the island of Lipari (Messina, Southern Italy). For a small number of particularly favourable cases, it was possible to define with great precision the outcrop area of the used rocks given their textural and mineralogical features. The specific source area contained a pickaxe originating from Cetraro–Fuscaldo metabasalt (lawsonite–albite facies) outcrops and two small axes in polished stone, one derived from migmatitic metapelites from Palmi and the other from meta-ultramafic rocks from Curinga. The choice of the used lithologies, harder or softer, had to be linked to the use that humans had to make of the lithic artefacts.

The Implements of the Blade House: The Function and Symbolic Significance of Laurel-leaf Bifaces from Caves in Central Belize

ABSTRACT The ancient Maya produced chipped chert and obsidian tools for inclusion in religious rituals as both symbolic and/or functional implements. In this paper, we discuss one particular form of these special chipped stone tools – the large laurel-leaf biface. Laurel-leaf bifaces recovered from the cave sites of Actun Chapat, Actun Tunichil Mucnal, Actun Yaxteel Ahau, and Je’reftheel in central Belize are analyzed in terms of context, lithic raw material, production techniques, symbolism, and use-wear in order to better understand their role(s) as ceremonially significant items. When combined with ethnohistoric and ethnographic information, these analyses allow us to see laurel-leaf bifaces as both functional implements for and powerful symbols of sacrifice within ancient Maya ideology and worldview.

Initial Upper Palaeolithic material culture by 45,000 years ago at Shiyu in northern China.

The geographic expansion of Homo sapiens populations into southeastern Europe occurred by ∼47,000 years ago (∼47 ka), marked by Initial Upper Palaeolithic (IUP) technology. H. sapiens was present in western Siberia by ∼45 ka, and IUP industries indicate early entries by ∼50 ka in the Russian Altai and 46-45 ka in northern Mongolia. H. sapiens was in northeastern Asia by ∼40 ka, with a single IUP site in China dating to 43-41 ka. Here we describe an IUP assemblage from Shiyu in northern China, dating to ∼45 ka. Shiyu contains a stone tool assemblage produced by Levallois and Volumetric Blade Reduction methods, the long-distance transfer of obsidian from sources in China and the Russian Far East (800-1,000 km away), increased hunting skills denoted by the selective culling of adult equids and the recovery of tanged and hafted projectile points with evidence of impact fractures, and the presence of a worked bone tool and a shaped graphite disc. Shiyu exhibits a set of advanced cultural behaviours, and together with the recovery of a now-lost human cranial bone, the record supports an expansion of H. sapiens into eastern Asia by about 45 ka.

Information shaping

AbstractIn this article, I explore the relationships between how humans have evolved to interact with the material world and how we interact with our information worlds. I argue that shaping processes, exemplified by how early humans created stone tools, are core ways to interact with the world that are appropriated to interact with information to create information solutions. To test these claims, I examine existing studies of information use from a shaping perspective. I finish by discussing how this evolutionary perspective to information use can benefit discussions of information behavior.

Mapping nut-cracking in a new population of wild capuchin monkeys (Sapajus libidinosus) at Ubajara National Park, Brazil.

Populations of bearded capuchin monkeys (Sapajus libidinosus) vary in their tool use behaviors, with some of this divergence regarded as culturally determined. The use of stone tools, primarily to crack open encased foods, is widespread among bearded capuchins living in dry habitats (Caatinga and Cerrado). Significant diversity in targets, processed foods, material, and size of tools is observed across populations. However, so far, only a few sites have been systematically studied, and we are still distant from a representative picture of the range of variation in capuchins' culture. In this study, we did a systematic assessment of stone tool use sites in the Ubajara National Park (UNP), in the Caatinga region of Ceará, Brazil, recording and measuring stone tools, processed foods, and available lithic resources as part of an extensive comparative research, the CapCult project. We found indirect and direct evidence that capuchin monkeys at UNP customarily use hammerstones and anvils to process at least two species of palm nuts, macauba (Acrocomia aculeata) and the harder babaçu (Attalea speciosa). Most of the anvils were rock surfaces and had leftovers of only one palm nut species. The hammerstones used to process both palm nuts were not significantly different in weight, although the ones used for Ac. aculeata were longer. We found a higher frequency of nut-cracking sites in the drier lowland area of the park, reflecting differences in the density of the most common palm species, Ac. aculeata, and availability of raw stone material. The stone tool use observed in UNP is within the scope of previously reported in savannah capuchin populations. Our study widens the knowledge of stone tool-use diversity in wild capuchin monkeys, which could contribute to shaping conservation policy, including cultural traits.

Chronology and paleoclimatic context of hominin occupations in the Fenhe River Basin of northern China during the middle to Late Pleistocene

The relationship between climate change and hominin evolution over the Pleistocene in East Asia is still poorly understood, in particular due to the limited number of archaeological finds and fossils with reliable chronologies. Paleolithic sites preserved in loess-paleosol sequences in eastern Chinese Loess Plateau provide prospective evidence for understanding hominin evolution and dispersion across the Middle to Late Pleistocene in northern China. The Fenhe River Basin has been known as a key area for paleolithic sites and fossil hominins. Here, quartz Optically stimulated luminescence (OSL) and K-feldspar post-infrared infrared stimulated luminescence (pIRIR) dating was employed on 61 samples from 13 paleolithic sites in the Fenhe River Basin. The reliability of the ages are checked by analysis of luminescence characteristics and comparison between quartz OSL and K-feldspar pIRIR ages. Paleoclimatic records were established using alternating loess-paleosol sequences, and multi-proxy indices of grain size, magnetic susceptibility, CaCO3 and color from the dated sites. These results provide the reliable chronology for hominin presence in the Fenhe River Basin spanning the past three glacial-interglacial cycles. Our results show that this region experienced predominantly dusty, dry and cold conditions during glacials and comparatively moist and warm interglacial conditions, that are sensitive to variations in East Asian Summer and Winter Monsoon (EASM and EAWM respectively) intensities over glacial-interglacial timescales. The Fenhe River Basin is a key geographic refuge for hominins during glacial-interglacial climatic changes in northern China. It was occupied over glacial and interglacial periods spanning at least the last 370 ky, and the evidence for hominin presence is especially clear from ∼250 to 60 ka and since ∼35 ka. The frequency of hominin activity, as indicated by the number of archaeological sites and density of stone artifacts, increased during warm and humid periods of MIS 7 and MIS 5, in contrast to the cold, windy, and dry period of MIS 6. Site numbers increased in MIS 3 and the Last Glacial Maximum, in association with microblade technology. The dating results indicate that hominins with ‘modern’ features may have occurred in the Fenhe River Basin ∼140 ka ago, however, the exact timing of modern human occupation in the region needs a more combined approach consisting of morphological, ancient DNA and geochronological studies.