Microwear analysis of experimental flint tools: a test case

Recent attempts to infer the functions of prehistoric stone tools have centred on the study of microscopic traces of wear on the surfaces of these tools. One method of “microwear analysis” involving high magnification and an incident light microscope is tested in this paper. Modern flint tools made and used in ways thought relevant to prehistory were produced by a lithic technologist and after cleaning given to the microwear specialist who attempted to infer their use. A high degree of agreement between inferred and actual uses was achieved and this encouraging result has important implications for the study of microwear on prehistoric tools where no such independent check is available.     

Recent developments in the analysis of lithic artifacts

A review of recent research on lithic technology and functional analysis is presented. Our perception of the state of the art is based on a review of the literature published during the past three years and on the topics that were covered at conferences and workshops on lithic analysis. While the goals have essentially remained the same since the turn of the century, concerns with chronology and the classification of lithic artifacts have given way to studies that treat stone implements as products of a dynamic system of human behavior. In order to understand stone artifacts and the people that made and used them, archaeologists must understand theprocesses involved in the acquisition, production, exchange, and consumption of lithic artifacts. In the past ten years, experimental studies involving the manufacturing and use of stone tools have been integrated with studies of refitted or conjoined lithic artifacts and microwear analysis. The result is a much more dynamic view of the variability in assemblages of lithic artifacts. In this review, we focus on replication and technological analysis of chipped stone artifacts and microwear analysis, and consider the implications of this research.     

Thermally Altered Novaculite and Stone Tool Manufacturing Techniques

Abstract

This paper describes a study of the physical origins of improved flaking properties, called flakeability, for novaculite, a material exploited for stone tool manufacture by the peoples of prehistoric Arkansas, Missouri, Texas, and Louisiana. Experimentation in thermal pretreatment and ways to detect and discriminate the results of this pretreatment were carried out. The criteria derived for distinguishing this alteration in the novaculite are easily determined by a straightforward analysis that can be done in almost any laboratory.

The results of this experimentation have direct implications for the study and identification of thermal pretreatment in this and other stone materials. From the correlations between the physical alteration of such source materials and the implication for manufacturing techniques, the archeologist can more validly infer relationships between prehistoric lithic technology and the knappers who developed highly diversified and specialized techniques. Such experiments combined with wear analysis, material source determination, and other lithic studies will allow the archeologist to delineate manufacturing and exploitative patterns and examine their relationship to all forms of cultural and environmental variables.     

News and Commentary on the Illicit Traffic in Antiquities

Abstract

The results of a high-power microwear analysis of stone artifacts from the Magdalenian site at Verberie, France, are reported in this study. Both retouched and unretouched implements were examined, and the various use-wear traces that were found are briefly discussed. The relationship between tool morphology and function, the use of unmodified lithic artifacts, and microwear traces indicative of hafting are described. In addition, some hypotheses are advanced regarding specific activity areas at the site. It is concluded that the unretouched component of the lithic industry comprised a large part of the Magdalenian toolkit at Verberie.     

Vein quartz in lithic traditions: an analysis based on experimental archaeology

Worldwide, vein quartz was a commonly used raw material for stone tools but this material has proved difficult for archaeologists to analyse because many quartz assemblages appear to be comprised of amorphous pieces, not easily recognised as humanly modified or forming ‘tools’. This paper discusses the analysis of the debitage – focusing on the debitage fragmentation rate, the debitage, break, and fragment types, and the quantitative analysis of the complete flakes – resulting from experimental knapping of quartz, which formed part of a project which investigated the use of quartz in Irish prehistoric lithic traditions. The results have highlighted the complexity involved in analysing quartz assemblages, and the significant differences between the debitage products of quartz and chert knapping assemblages. While bipolar knapping is generally easy to differentiate from direct percussion, it is harder to differentiate between soft and hard hammer percussion.     

Late Holocene Artifact Patterns and the Introduction of Herding to Semi-Arid Coastal Namaqualand,South Africa

ABSTRACT

Considerable change occurred in the Late Holocene Later Stone Age of Namaqualand, northwestern South Africa. Focusing on stone artifacts, pottery, and ostrich eggshell beads, the cultural sequence for the area is described. Two additions are identified, complicating the traditional model for the introduction of herding into the country. From the mid-Holocene onward, lithic assemblages are based on milky and/or clear quartz and cryptocrystalline silica and initially contain many backed tools with scrapers more common during the first millennium BC. These are hunter-gatherer assemblages. During the final centuries BC, backed bladelet-rich assemblages based on clear quartz appear, with the earliest examples demonstrating typological continuity with the existing assemblages. About 1,500 years ago, expedient assemblages lacking retouch and based on poorer quality quartz appear. The three types co-occur during the last 1,500 years, occasionally in combination with one another. This contrasts strongly with other parts of South Africa where just two distinct assemblage types are identified, suggesting that the hunter-gatherer-herder dichotomy is not universally valid. The artifact patterns between about 200 cal BC and cal AD 500 and the introduction of livestock suggest considerable cultural and social change, heralding the onset of a local Neolithic, but the exact mechanisms remain unclear.     

Building an Experimental Comparative Reference Collection for Lithic Micro-Residue Analysis Based on a Multi-Analytical Approach

Residue analysis applied to stone tools is a useful aid for better understanding their past function and, by extension, reconstructing early human behaviour. However, if the nature of residues found on the lithic tools is misinterpreted, so will be our understanding of their archaeological context. As a consequence, correctly identifying residues in the domain of lithic studies is of paramount importance. With this main goal in mind, we analysed different experimental materials likely to have been involved in daily tasks in the prehistoric context (e.g. bone, wood, meat). Microscopic analyses were then carried out using two (comparable) techniques: Optical Light Microscopy and Scanning Electron Microscopy. Also, energy dispersive X-rays spectroscopy (EDX or EDS) was applied to the experimental samples to determine their elemental composition. Advantages and disadvantages of both microscopic methods and their implications for correct residue identification are discussed. The distribution of residues on lithic surfaces is also considered. This study resulted in the construction of a data-set including both photographic material and EDX spectra for each residue analysed. The main result is that, compared to OLM scanning, SEM analyses highly improves the accuracy of residue identification.     

Mobility patterns and core technologies in the Middle Paleolithic of the Levant

Mobility is thought to be a significant source of Middle Paleolithic archaeological variability in the East Mediterranean Levant. However, models of Levantine Middle Paleolithic land-use have historically been based on rare and taphonomically sensitive evidence from a limited number of sites. Because lithic artifacts are the most ubiquitous archaeological remains available to the prehistorian, relationships between stone tool technology and mobility patterns can improve tests of hypotheses about prehistoric land-use strategies. This paper examines variation in Middle Paleolithic mobility strategies in the Levant from the perspective of core technology. A model linking expedient core reduction techniques and decreased mobility is adapted from one developed for late prehistoric contexts in the New World. Incorporating core data from numerous Levantine Middle Paleolithic assemblages, this study tests hypotheses about diachronic change, synchronic geographic variation, and possible hominin behavioral differences in mobility strategies.     

Determining the use of Late Archaic shell rings using lithic data: “ceremonial villages” and the importance of stone

ABSTRACT

Late Archaic shell rings have been the focus of archaeological research for decades, yet their history, use, and function are debated. Relying on an evidentiary line rarely used in shell ring studies – the analysis of stone tools and debitage – we test prevailing theories and find that models describing the rings as circular dams intended to hold freshwater are incorrect. Instead, by tracing the origins of stone and its distribution within two shell rings on St. Catherines Island, Georgia, we posit that shell rings were places of both daily residence and intermittent gatherings. Because they have proven useful in interpreting the St. Catherines Island shell rings, we suggest archaeologists shift their sampling and recovery techniques so that representative lithic assemblages can be attained from other rings, thereby providing a better understanding of ring-builders and the Late Archaic occupation of the South Atlantic coastline.     

Experimental Flake Scatter-Patterns: a New Interpretative Technique

Abstract

Scatters of flint waste flakes are among the commonest finds on prehistoric sites. To understand how such patterns are formed, we made a series of Neolithic axe roughouts and other tools and recorded the distribution of waste flakes. The most important variable affecting the size and shape of flake scatter patterns seems to be the knapper's position. The applications of these experiments to prehistoric data are considered.     

Slicing Cut Marks on Animal Bones: Diagnostics for Identifying Stone Tool Type and Raw Material

Abstract

Butchering implements leave identifying signatures on bones. From these signatures, it is possible to distinguish the different raw materials and types of chipped stone butchering tools. The results of recent experiments enable us to distinguish the different types of raw materials and tools used in the butchering process, in particular those implements that produce slicing cut marks. Three types of chipped stone tools (blades,flakes, and side scrapers) and raw materials (flint, obsidian, and quartzite), as well as issues relevant to lithic production and use were examined and tested. Silicone molds of cut marks produced by each of the instruments were made and subjected to analysis in light optical and scanning electron microscopes under various levels of magnification. The criteria used for distinguishing tool type, raw material, type of production and use characteristics of the respective cutting instruments are presented, as well as a discussion of the application of the experimental results to the Early Bronze Age I site of Afridar, Israel. The data from Afridar indicate that almost all of the butchering marks on animal bones from the site were made by stone tools, in particular haphazardly-made flakes.     

Testing Area‐Scale Fractal Complexity (Asfc) and Laser Scanning Confocal Microscopy (LSCM) to Document and Discriminate Microwear on Experimental Quartzite Scrapers

Few microwear studies have been conducted on tools made from quartzite. Most rely on visual observation of microwear features using optical light microscopes and scanning electron microscopes. Quantification of microwear on quartzite tools is extremely rare, even though numerous methods to mathematically document surface roughness have been applied to other silicate tools. In this paper, laser scanning confocal microscopy (LSCM) was used to document surface roughness on four experimental scrapers made from two different subtypes of Mistassini quartzite that were used on either fresh or dry deer hide. Surface roughness data were analysed using area‐scale fractal complexity (Asfc). The results of this test case indicate that Asfc can effectively discriminate between the unused and used regions on the quartzite tools based on surface roughness, and that it can also discriminate between surface roughness produced by working dry versus fresh hides. Differences in the subtypes of Mistassini quartzite did affect surface roughness, but not significantly enough to prevent discrimination of the dry and fresh hide‐working tools. Although the use of the Asfc parameter for lithic microwear analysis requires further testing, these first results suggest it could be a reliable technique to mathematically document and discriminate wear patterns on archaeological quartzite tools.     

A NOVEL APPROACH TO STUDIES OF PREHISTORIC EXPLOITATION OF STONE TOOL MATERIALS USING MATERIAL COMPOSITION,SURFACE MORPHOLOGY,MICROSTRUCTURE AND MECHANICAL PROPERTIES*

For a comprehensive understanding of material exploitation in prehistory, we applied advanced analytical methods to Japanese prehistoric stone tool materials. Compositions, surface morphologies, microstructures and mechanical properties of the primary lithic materials were analysed. As a result of the tests on actual Palaeolithic artefacts, preferential material selection was observed based on composition, structure and other physical properties of the materials. Homogeneous materials composed of a single type of mineral—α‐quartz—were intentionally selected for Palaeolithic tools regardless of the type of rock. These materials unexceptionally present higher hardness and strength. Moreover, materials composed of extremely fine crystal grains of ~0.1 µm in size with highest hardness and strength were selectively used for sharp‐edged blades. These results lead us to the conclusion that quantitative and objective analyses will give us precise information on prehistoric materials, which will enable us to make an analytical approach to the comprehension of prehistoric exploitation of stone materials. This could eventually complement the traditional interpretation of material exploitation based on conventional petrological classifications.     

Ethnoarchaeology and the Organization of Lithic Technology

Although the modern production and use of stone tools is rare, ethnoarchaeological research on this subject has provided important perspectives on methodological approaches to archaeological lithic analysis. Recent ethnoarchaeological research on lithics frequently takes the form of “cautionary tales,” warning against the primacy of functional variables most commonly invoked by lithic analysts. I argue that lithic ethnoarchaeology would benefit from a comparative organizational framework for explaining variation in patterns of stone tool use that takes into account the predictability and redundancy of the location and timing of technological activities. Understanding the underlying causes of modern patterns of stone tool use, in turn, offers a framework for exploring sources of lithic technological variation in the archaeological record. I also argue that technological analytical perspectives, such as the cha?ne opératoire and sequence of reduction approaches, can benefit from the insights gained through lithic ethnoarchaeological research, helping us define important analytical concepts and identify appropriate units of analysis.     

How flakes shatter: a critical evaluation of quartz fracture analysis

Despite its worldwide use as a stone tool raw material, quartz is known to be a difficult material for archaeologists. The main reason for this is the tendency of quartz flakes to fragment during detachment, which complicates the use of traditional lithic analyses. In this article we present an experimental study of quartz flake fragmentation. We evaluate the method called fracture analysis that has been developed and used explicitly for the study of quartz assemblages. The method assumes high predictability of quartz flake fragmentation, but our experiments show that there is significant variation in fragmentation that fracture analysis does not take into account. Our results indicate that this variation is partly explained by indenter hardness, the relative thickness of the detached flake, as well as individual knapper-related factors. These results undermine the applicability of quartz fracture analysis in its current form. In addition, we discuss the effects of flake fragmentation on the technological organisation of prehistoric quartz users and suggest that it has affected reduction strategies as well as blank and tool dimensions. We also suggest that there should be mobility-related differences in archaeological assemblages in terms of the quality of the quartz raw material and that the curation of quartz should be low in relation to better quality raw materials used parallel with it.     

Excavations at Prehistoric Sites on the Navajo Indian Irrigation Project,Northwestern New Mexico

Abstract

The results of a large excavation project in the San Juan Basin of NW New Mexico are summarized in this article. Discussion is limited to prehistoric and protohistoric sites, 22 of which were excavated. The majority of the remains are small, surface aceramic sites that are believed to relate to the Archaic Cultural Complex. These sites reflect a specialized adaptive strategy focusing on seasonal mobility and the exploitation of resources occurring at or adjacent to sand dunes. The lithic assemblages from these sites generally are homogeneous and reflect opportunistic usage. Occupation of the project area during the Anasazi phases was limited. A considerable protohistoric Navajo occupation is apparent, with one excavated site suggesting a very specialized economic orientation emphasizing antelope procurement. The research focus of the project was on comprehensive lithic analysis and on paleoeconomy. Several methodological considerations are discussed, as is the necessity for developing a unified research perspective that will produce comparable data for the region.     

Standing at the gates of Europe: Human behavior and biogeography in the Southern Carpathians during the Late Pleistocene

This study presents a behavioral analysis of Middle and Upper Paleolithic lithic assemblages from 14 sites located in the southern Carpathian Mountains. Using a whole assemblage behavioral indicator, we show that the hominins that manufactured those stone tools do not appear to have differed in terms of the flexibility of the mobility strategies they employed to exploit their landscapes. Rather than biological change, we argue that large-scale climate changes are likely more important drivers of behavioral changes during the Late Pleistocene of the region, including during the Middle–Upper Paleolithic transition. These results agree well with the results of studies having employed this methodology in other regions, suggesting that this is a generalized feature of the transition across Eurasia. Recasting the transition as a mainly ecological rather than purely biocultural process allows us to generate new perspectives from which to approach the question of behavioral change during the Late Pleistocene, and ultimately suggests that the process referred to as the ‘Middle–Upper Paleolithic transition’ is essentially a brief segment of a much more extensive process driven by prehistoric human–environment interactions that would culminate in the highly logistical mobility strategies documented throughout the continent at the Last Glacial Maximum.     

Stone Tool Production of the Longshan Culture at the Liangchengzhen Site in Rizhao of Shandong

The manufacture of stone tools was one of the most important craft production activities in prehistoric human society. Previously, lack of sound evidence had made it too early to confirm whether or not stone tool production during the Longshan cultural period had already transformed from a primitive self-sufficient household mode of production to a specialized mode of production. Excavation of the site of the Longshan cultural site at Liangchengzhen in Rizhao, Shandong from 1998–2001 through meticulous field methods such as sieving and floatation yielded a large number of lithic reduction tools, ranging from grinding stones, stone hammers, and polishing stones to raw materials, semi-finished products, and lithic debitage of various sizes, resulting from the lithic reduction process. This excavation suggests that the Liangchenzhen site was a settlement site where the complete process of lithic reduction was practiced. Through comparison with contemporary large-scale excavated sites of the Longshan culture, it is suggested that the Area 1 at the Liangchengzhen site was a lithic reduction locality with a relatively high degree of specialization which was used for hundreds of years. It is possible that stone tool production had already advanced to a stage of relatively high specialization during the Longshan cultural period in the Haidai region.     

Molluscan Shell Knives and Experimental Cut-Marks on Bones

Abstract

Experimentation demonstrates that the retouched edges of molluscan shells can be used effectively as butchery knives in the absence of lithic raw materials and leave striations on bone surfaces that may be indistinguishable from cut-marks made by stone knives. The potential of such non-lithic cutting tools suggests one new possible category of early artifact, and may explain the presence of cut-marks on fossil bones in paleoenvironments where stone artifacts were absent or rare.