Raw material quality and Oldowan hominin toolstone preferences: evidence from Kanjera South,Kenya

The role of raw material quality in Oldowan technology has not been fully explored. There are numerous studies suggesting Oldowan hominins preferred certain types of stone for artifact manufacture. Previous studies of the artifact assemblage from the early Pliocene Oldowan locality of Kanjera South (South Rachuonyo District, Kenya) show that raw material selection and transport was an important aspect of Late Pliocene hominin adaptations. Yet the exact properties of stones that hominins were selecting remain enigmatic. Two potentially important features of artifact raw material are durability and fracture predictability. We investigate fracture predictability through mechanical tests of stone and investigations of the affect of stone properties on fracture patterns in archaeological collections. We investigate stone durability with actualistic studies of edge attrition combined with further mechanical tests of various lithologies. Oldowan hominins at Kanjera appear to have selected raw materials based on their durability. The ability for a stone to fracture consistently does not appear to be as important in hominin toolstone preference as previously assumed. Hominins that produced the assemblages at Kanjera South appear to have incorporated an extensive understanding of various attributes of raw material in the transport and production of stone artifacts. When combined with previous research on the transport patterns at Kanjera, the results of this study provide evidence for a more complex raw material acquisition strategy than has previously been suggested for Late Pliocene Oldowan hominins.     

Oldowan behavior and raw material transport: perspectives from the Kanjera Formation

The archaeological record of Oldowan hominins represents a diverse behavioral system. It has been suggested that exploitation of lithic resources by Oldowan hominins was simplistic and represented mostly use of local sources of stone. Here we investigate the raw material selection and transport behaviors of Oldowan hominins reflected in the stone artifact assemblages from the Kanjera South Formation, South Rachuonyo District, Kenya. Using geochemical methods (ED-XRF) artifacts are linked to primary and secondary source outcrops throughout southwestern Kenya. These data show that hominins selected raw materials for transport at frequencies that are significantly different from their availability on ancient landscapes. Furthermore, a substantial proportion of the assemblage represents transport over relatively long distances (>10 km). Our study further suggests that in the early stages of stone tool use hominins used a wide variety of raw materials and selected these materials at some distance from their eventual discard locations. Early hominin behavior may have incorporated an understanding of raw material source distributions across a more extensive landscape than has been previously documented. This supports the growing perspective that Oldowan technology represents a more complex behavioral pattern than is usually associated with the beginnings of hominin tool use.     

Experimental evaluation of Kuhn's geometric index of reduction and the flat-flake problem

This paper presents the results of an experiment designed to explore the performance of Kuhn's Geometric Index of Unifacial Reduction [S. Kuhn, A geometric index of reduction for unifacial stone tools, Journal of Archaeological Science 17 (1990) 585—593] in measuring the amount of material removed over a sequence of retouching events for a population of 30 flakes. The index provides a reliable absolute measure of reduction under experimental conditions, and does so irrespective of blank cross-section, suggesting that the “flat-flake” problem is not necessarily a serious difficulty for the index. Furthermore, Kuhn's Index provided a more sensitive and robust measurement of the extent of reduction than any of the alternative techniques proposed in recent years.     

Early Australian implement variation: a reduction model

The composition of lithic assemblages is typically depicted in terms the relative abundance of different implement types. In this paper we hypothesize that the characteristics of early Australian assemblages said to distinguish those types are part of a morphological continuum, and that this continuum is largely explained as a reflection of different levels of reduction. We demonstrate the viability of this perspective at one of the classic sites at which early industries were defined, Capertee 3. The existence of an Australian technology structured around continuous reduction without evidence of “imposed form” reveals that this pattern is widespread and should not be taken to represent an “archaic” approach to stone working. Implications for conventional interpretations of Palaeolithic stone implements are briefly examined.     

Experimental assessment of plan-view and profile-view gross-edge curvature on stone flake slicing efficiency

Separating two or more aspects of an object via cutting was likely an important factor in the origin and evolution of flaked stone technology. In recent years experiments have demonstrated that several stone tool attributes can influence different kinds of cutting behaviour: slicing, cleaving, scraping, sawing, drilling, piercing and abrading. Here we experimentally assessed the role of stone flake plan- and profile-view gross-edge curvature in a controlled slicing task. We also assessed the role of edge length. A total of 21 participants, using 252 stone flakes with distinct gross-edge curvatures and edge lengths, were asked to cut through a standardized substrate, and their efficiency in the task was measured over time. Flakes with longer edge lengths increased the efficiency of the cutting task, but increasing either plan- or profile-view edge curvature decreased the efficiency of the cutting task. These results have implications for the emergence of particular tool forms or reduction sequences throughout the Pleistocene, and may in part explain why certain forms were favoured by Paleolithic people, leading to their convergent evolution or widespread transmission.     

Testing the Efficiency of Simple Flakes,Retouched Flakes and Small Handaxes During Butchery

Handaxes, simple flakes and retouched flakes are three types of stone tools whose adaptive advantages are highly debated. Interpretations of these technologically different tools suggest that their adequacy for butchery is uneven. Although some experimentation has been made in this regard, further research is needed to understand which of these tool types are more efficient for butchery, thus granting adaptive advantages to the hominins who used them. The present experimental work shows that small handaxes provide higher return rates in butchery activities than simple and retouched flakes. Efficiency (measured in time) is significantly positive in handaxes compared to the other tools when defleshing. In contrast, when comparing the three stone tool sets (simple flakes, retouched flakes and handaxes), the return values obtained for disarticulation are very similar. This study also shows that cut marks do not occur randomly and are less stochastic than previously assumed. Defleshing leaves a preferential cluster of cut marks on mid‐shafts from long bones and even on these sections, depending on element type, patterns are statistically demonstrable.     

A Statistical Examination of Flake Edge Angles Produced During Experimental Lineal Levallois Reductions and Consideration of Their Functional Implications

Recent studies have indicated that Levallois-style core reduction offered potential practical benefits to hominin populations. However, none of these studies have yet considered one of the most important functional attributes of flake tools, which is edge angle. To address this shortcoming, we statistically examined flakes produced experimentally during “classic” or “lineal” Levallois core production and reduction. The primary aim of our analyses was to statistically test the null hypothesis of “no difference” between the edge angles of “Levallois” products and the flakes involved in their production. We employ existing edge angle analytical techniques and develop new comparative methodologies to assess flake blank standardization through the case of Levallois core reduction. Having determined the statistical properties of our experimental Levallois reductions, we thereafter evaluated to what extent edge angles produced may, or may not, have been useful to prehistoric hominins. Our analyses demonstrated that the experimentally produced Levallois edge angles were indeed statistically different from the flakes involved in their production. These differences were evident both in terms of relatively higher (i.e., more obtuse) edge angles than debitage flakes and in being significantly less variable around their higher mean edge angles compared to debitage flakes. However, based on current knowledge of how flake edge angle properties relate to issues of functionality, such differences would not have been detrimental to their functionality. Indeed, the edge angle properties they possess would have provided distinct benefits to hominins engaged in their manufacture. Most notably, Levallois-style core organization and reduction would have provided hominins with a reliable means of consistently producing flakes (i.e., “Levallois flakes”) possessing average flake angles that are beneficial in terms of providing a viable cutting edge yet not being so acute as to be friable upon application. Hence, edge angle properties join an array of other features that provide logical motive for why hominins may have organized core production and reduction around Levallois-style patterns at various times and places during the Mid-Late Pleistocene.     

Were Olduvai Hominins making butchering tools or battering tools? Analysis of a recently excavated lithic assemblage from BK (Bed II,Olduvai Gorge,Tanzania)

A new interpretation of early stone-tool use by hominins at Olduvai depicts them as involved in battering activities (using pounding tools) rather than making cutting butchering tools as is commonly inferred in most other Plio-Pleistocene sites where lithics appear associated to faunal remains. The bulk of this interpretation is based on the recognition of the stigma of percussion activities in anvils and detached by-products. Renewed excavations at BK after more than half a century of the beginning of the digging at the site by M. Leakey have produced a new and unbiased lithic assemblage. The taphonomic study of the faunal assemblage has shown that BK is an anthropogenic site where carcass butchery practices were repeatedly performed over a vast amount of time. The present analysis of the lithic artefacts supports this interpretation by showing that the obtainment of flakes was the principal aim in stone knapping. We argue that a number of technical traits observed in the lithic collection of BK can be best interpreted as the result of bipolar loading rather than the by-products of battering activities. Since BK has provided the second largest collection of hominid-modified bones from Olduvai, it is concluded that detached pieces produced in the course of bipolar reduction might have played an active role in bone modification and that active rather than passive percussion behaviors might have been responsible for the formation of the lithic assemblage. The functionality of the Oldowan stone tools are discussed under the light of the new study.     

Oldowan reduction sequences: methodological considerations

Transport of resources is a major feature of Oldowan hominin technological adaptations. Comparisons between different Oldowan localities often employ measures of transport that are based on artefact attributes as proxies for the intensity of raw material utilization. The Technological Flake Category system [Toth, N., 1985. Oldowan reassessed: a close look at early stone artifacts, Journal of Archaeological Science 12, pp. 101–120] has been used extensively to infer the relative intensity of lithic reduction within Oldowan assemblages. Here we use a large experimental sample to test the relationship between a flake's stage in a reduction sequence and various quantitative attributes. We demonstrate how many previously described attributes are affected by initial core size. We then develop a multiple linear regression model that incorporates several variables to predict the placement of a flake within a generalized reduction sequence. The model is then applied to Oldowan assemblages in the Koobi Fora Formation which explores the strengths and weaknesses of different methods of investigating reduction intensity on an assemblage level.     

1. PRETEXTURES OF TIME

Textures of Time is a rich and challenging book that raises a host of important and hard questions about historical narrative, form, and style; the sociology of texts; and the core problem of ascertaining historical truth. Two that pertain to the book's main claims are of special interest to nonspecialist readers: Is register or style—“texture”—necessarily and everywhere diagnostic of “history”? Does a new kind of “historical consciousness” emerge in south India beginning in the sixteenth century, indeed as a sign of an Indian early modernity?Textures is not the first book to argue that historical discourse is constitutively marked by a peculiar style, but the claim is beset by difficulties that scholars since Barthes have detailed. Rather than textures of time—accounts of what really happened in history—what these works offer us may be only pretextures of time, textualized forms of a human experience that make claims about its degrees and types of truth through representations of various states of temporality. Instead of assessing, then, whether these works are history or something else like “myth,” we might ask whether they invite us to transcend this very dichotomy, to try, that is, to make sense of historical forms of consciousness rather than to identify forms of historical consciousness. As for modernity, nothing in south Indian historiography from 1500–1800 remotely compares to the conceptual revolution of Europe. But why should we expect the newness of the early modern world to have been experienced the same way everywhere? Modernity across Asia may have shown simultaneity without symmetry. Should this asymmetry turn out to reveal continuity and not rupture, however, no need to lament the fact. There is no shame in premodernity.     

Stone technology at the Middle Pleistocene site of Mata Menge,Flores, Indonesia

The stone technology from Mata Menge on Flores, Indonesia, is described, providing the first detailed analysis of the largest stone artefact assemblage from a stratified and securely dated Middle Pleistocene site in Southeast Asia. Technological analysis indicates a reduction sequence based on the centripetal, or “radial”, reduction of transported blanks. The implications for early hominin behaviour on Flores are considered.     

关于石片台面研究的一些问题-兼与卫奇先生商榷

本讨论了石片台面的分类、石片台面的类型等问题。台面可能按其保留情况、性质、加工情况和形态等不同层次进行分类,本主张应着重前3个层次进行分类。在某些特殊技术形成的石片中,台面的形态因为与该打片技术密切相关故也具有一定的分类意义。     

The World's Oldest Stone Artefacts from Gona, Ethiopia: Their Implications for Understanding Stone Technology and Patterns of Human Evolution Between 2·6–1·5 Million Years Ago

The systematic archaeological and geological survey and excavations at Gona between 1992–1994 led to the discovery of well-flaked stone artefacts which are currently the oldest known from anywhere in the world. More than 3000 surface and excavated artefacts were recovered at 15 localities documented east and west of the Kada Gona river. Based on radioisotopic dating (⁴⁰Ar/³⁹Ar) and magnetostratigraphy, the artefacts are dated between 2·6–2·5 million years ago (Ma). EG10 and EG12 from East Gona are the most informative with the highest density, providing the best opportunity for characterizing the oldest assemblages and for understanding the stone working capability of the earliest tool makers. Slightly younger artefact occurrences dated to 2·4–2·3 Ma are known from Hadar and Omo in Ethiopia, and from Lokalalei in Kenya. Cut-marked bones dated to 2·5 Ma from Bouri in Ethiopia are now providing important clues on the function of these artefacts. In addition, Australopithecus garhi known from contemporary deposits at Bouri may be the best candidate responsible for the oldest artefacts. Surprisingly, the makers of the Gona artefacts had a sophisticated understanding of stone fracture mechanics and control similar to what is observed for Oldowan assemblages dated between 2·0–1·5 Ma. This observation was corroborated by the recent archaeological discoveries made at Lokalalei. Because of the similarities seen in the techniques of artefact manufacture during the Late Pliocene–Early Pleistocene, it is argued here that the stone assemblages dated between 2·6–1·5 Ma group into the Oldowan Industry. The similarity and simplicity of the artefacts from this time interval suggests a technological stasis in the Oldowan.     

The Paleolithic of Central Asia

The Lower Paleolithic of Central Asia is represented by several sealed and more or less firmly dated Lower–Middle Pleistocene cave and open-air sites in the southeastern part and by more numerous surface occurrences throughout the region. The assemblages assigned to the Lower Paleolithic form two rather distinct groups, one remarkable for well-made handaxes and the other characterized by cores and flakes with no handaxes. The distribution map of pebble industries and industries with handaxes shows that while the latter originate from the western regions of Central Asia, the former are concentrated in the eastern part of the area. The Middle Paleolithic assemblages of Central Asia do not form a single technocomplex. Their variability in time is difficult to assess, but variation in space is obvious. Very few Upper Paleolithic sites in this region are known. At the same time, their stone industries are very diverse and most of them differ sharply from each other and from sites in adjacent regions.     

Stone Tool-Making and Brain Activation: Position Emission Tomography (PET) Studies

This study introduces to archaeology a new experimental technique for examining the relationship between stone tool-making and brain function. The principal focus of this exploratory study was the development of effective methods for the identification and examination of the regions of the modern human brain recruited during the manufacture of simple (Oldowan or Mode I) stone tools. The functional brain imaging technique employed, Positron Emission Tomography (PET), examines task-related brain activity by assessing changes in regional cerebral blood flow during specific tasks. The single-subject study reported here represents a heuristic, initial exploration of this subject. Results indicate that during stone tool-making there was heavy activation of cortical and subcortical regions of the brain associated with motor and somatosensory processing. Especially interesting was the high degree of activation in areas known to be involved with complex spatial cognition requiring integration of diverse sensory inputs (e.g. vision, touch, and proprioception, or sense of body position and motion). Expansion of such higher-order association areas has been particularly important during the course of human evolution. This single-subject pilot study demonstrates the application of the PET brain imaging technique to the study of early stone technologies and suggests hypotheses to be tested in more comprehensive studies in the future.     

河北昌黎渟泗涧细石器地点

<正> 淳泗涧细石器地点发现于1990年,91年10月,河北省文物研究所会同秦皇岛市文物管理处,昌黎县文物保管所对该地点进行了为期一个月的试掘。试掘面积25平方米,共发现400多件石制品,没有发现动物化石。 一、地理位置与地层 该地点位于昌黎县城东北2公里处,距其东南的淳泗涧村约0.5公里,地理坐标;E119°10′N39°44′,海拔65米。该地点背靠燕山余脉亮甲山,南为平原,京山铁路在地点南部穿过。其东南约14公里处即为渤海(图一)。 淳泗涧南为饮马河,东北为东沙河,两河向东注入渤海。地点附近的山前地带为饮马河的支流,支流两岸有两级阶地发育。二级阶地紧靠山脚,由于洪水冲刷以及山脚下基岩中泉水     

Minor Complementation Patterns in Post-classical Greek (I–VI AD): A Socio-historical Analysis of a Corpus of Documentary Papyri

Classical Greek (V–IV BC) is known for the complexity of its complementation system, involving infinitival, participial, and finite verb forms. In Post-classical Greek (III BC–VI AD), a simplification of this system takes place, whereby finite complementation becomes much more frequent, and ?τι is used as a “generic” complementizer. This article analyses to what extent complementation patterns other than ?τι with a finite verb form and the accusative with the infinitive are still used in the Post-classical period (I–VI AD), focusing on documentary sources (i.e. letters and petitions). I show that various “minor” complementation patterns are (still) attested; some of them are known from Classical Greek, while others are entirely new formations. I furthermore argue that “factivity” and “formality” are two key factors in explaining the distribution of these patterns.     

Could woodworking have influenced variation in the form of Acheulean handaxes?

The relationship between tool form and function is fundamental to hominin behaviour and evolution. Acheulean handaxes are known for their general consistency across more than a million years and three continents, albeit with some variation in size and shape. However, the influence of this variation on cutting has only rarely been studied, mostly in either butchery or generalized cutting tasks. Yet evidence indicates that handaxes were used for woodworking by at least 1.5 mya. Here, we experimentally tested whether woodworking could have exerted selective pressures on handaxe form. Additionally, these data were compared with a previous experiment that tested flakes during woodworking. For handaxes, no significant relationships were detected in woodworking efficiency. Accordingly, woodworking likely did not exert strong selective pressures on handaxe variability. However, the effectiveness shown by handaxes further demonstrates the functional flexibility of this technology, which is likely a factor contributing to their use over broad temporal, geographical and ecological spans. When comparing handaxes with flakes, only the smallest flakes were found to be significantly less efficient than handaxes. Therefore, the functional demands of woodworking were likely influencing hominin technological decisions about flake morphology, or the selection of flakes for woodworking, more than they were handaxe morphology.     

Visions of Community: An Introduction

The co-editors' introduction to this special issue of History and Anthropology outlines the rationale for featuring this collection of essays by social anthropologists and historians on medieval and early modern communities in Europe and Asia. After discussing basic terms and concepts in this endeavour, the introduction proceeds to address the comparative challenges implied in such transcontinental and cross-cultural forms of methodological practices. From here, the argument introduces this special issue's main division into three subsections, that is, (A) “Interdisciplinary Inspirations”, (B) “Cross-cultural Comparisons” and (C) “Transdisciplinary Intersections”. The text concludes with brief introductions to the contributing articles, and by a summary of the innovative conceptual and methodological results emanating from these forms of cooperation.