Influence of Handaxe Size and Shape on Cutting Efficiency: A Large-Scale Experiment and Morphometric Analysis

Handaxes represent one of the most temporally enduring and geographically widespread of Palaeolithic artifacts and thus comprised a key technological strategy of many hominin populations. Archaeologically observable variation in the size (i.e., mass) and shape properties of handaxes has been frequently noted. It is logical to ask whether some of this variability may have had functional implications. Here, we report the results of a large-scale (n?=?500 handaxes) experiment designed to examine the influence of variation in handaxe size and shape on cutting efficiency rates during a laboratory task. We used a comprehensive dataset of morphometric (size-adjusted) shape variables and statistical methods (including multivariate methods) to address this issue. Our first set of analyses focused on handaxe mass/size variability. This analysis demonstrated that, at a broad-scale level of variation, handaxe mass may have been free to vary independently of functional (cutting) efficiency. Our analysis also, however, identified that there will be a task-specific threshold in terms of functional effectiveness at the lower end of handaxe mass variation. This implies that hominins may have targeted design forms to meet minimal (task-specific) thresholds and may also have managed handaxe reduction and discard in respect to such factors. Our second set of analyses focused on handaxe shape variability. This analysis also indicated that considerable variation in handaxe shape may occur independently of any strong effect on cutting efficiency. We discuss how these results have several implications for considerations of handaxe variation in the archaeological record. At a general level, our results demonstrate that variability within and between handaxe assemblages in terms of their size and shape properties will not necessarily have had immediate or strong impact on their effectiveness when used for cutting, and that such variability may have been related to factors other than functional issues.     

Envisioning Artifacts: a Classic Maya View of the Archaeological Record

This paper explores a Classic Maya (ca. AD 250–900) “material vision”—that is, a locally determined and culturally specific way of understanding the material world, its salient qualities, and associated meanings—based on evidence found in hieroglyphic texts from across the Maya world. Understanding Classic Maya ways of seeing the material world is an important undertaking as part of exploring alignments and misalignments between ancient indigenous and modern archaeological understandings of what today we view as “artifacts.” This topic is explored in the article through two related inquiries: first, I look at “artifacts” (i.e., materials that qualify as such, in an archaeological material vision) recorded in the hieroglyphic record, yielding thematic understandings of objects related to form and function, wholeness versus brokenness, and the relational potential of objects. Second, I use ten hieroglyphic property qualifiers that indicate Maya material perceptions and categories to gain explicit insight into some organizing principles within a Maya way of visualizing the material world. Throughout the article, I ask: can we envision archaeological objects using Maya conceptions, and how does this way of seeing align or misalign with archaeological material engagements?     

Exploring Accumulation Rates of Shell Deposits Through Seasonality Data

Shell middens are often analysed as the result of short- or long-term depositional activities. In order to confidently interpret such deposits, it is necessary to have accurate estimations of shell accumulation rates, most commonly produced by radiocarbon dates. This paper introduces the application of seasonality data as a temporal measurement of short-term shell deposition. This gives access to an additional estimate of shell accumulation rates, which work on a shorter timescale than can be analysed through radiocarbon dating. We focus on shell deposits on the Farasan Islands, Saudi Arabia, which comprise over 3000 shell midden sites dating to the mid-Holocene (6500–4500 calBP). One site (JW1727) was chosen to (1) explore the potential of seasonality data to reconstruct accumulation rates, (2) analyse the intensity of exploitation and (3) assess the visibility of short-term shellfish deposits. Stable oxygen isotope values (δ¹⁸O) were obtained from the marine gastropod Conomurex fasciatus (Born 1778), representing 72 % of the shell weight of JW1727, to reconstruct season of capture. Seasonality data was grouped by their spatial distribution, which allowed successive episodes of deposition within a stratigraphic sequence to be connected. This allowed us to make an estimation of exploited shell meat of ～200 kg over a 7-month period (～400 shells/day). We argue that excavation methods and low resolution stratigraphic data cause imprecision in the seasonality data and the low visibility of rapidly accumulated shell deposits. Also, an increase of analysed shells per layer is key to understanding the seasonal brickwork of more middens in the future.     

Mesh Is More—Using All Geometric Dimensions for the Archaeological Analysis and Interpretative Mapping of 3D Surfaces

In various disciplines, particularly those that utilise techniques developed in the geosciences, the display, analysis and interpretation of three-dimensional (3D) data is very important. This is also the case in archaeology. Irrespective of a site- or landscape-centred point of focus, archaeology deals with very complex surfaces and always examines traces of past human presence in three geometrical dimensions. Visualising these detailed geometric environments is not that much of an issue anymore; however, interactively interpreting and mapping them is still problematic. Despite the steady increase in technologies to create 3D models, there is still a serious lack of tools that allow for easy interaction with these models in a metrical and coordinate system-aware environment. As a result, most—if not all—interpretation workflows will first downscale 3D data to two-and-a-half-dimensional (2.5D) or 2D data sets, thus effectively discarding up to one geometrical dimension. To enable or enhance the perception of topographic characteristics in these geometrically compromised datasets, various visualisation techniques have been developed to artificially restore and enhance the data that was initially discarded. While these techniques work very well to enhance the remaining pertinent features present in such data sets, data downscaling can nevertheless irrevocably eliminate significant amounts of important archaeological information. Therefore, this paper outlines a new processing and interpretation pipeline for complex archaeological 3D surfaces that do not rely on downscaling of data, while also discussing several 3D-related concepts and issues along the way. More specifically, this article focusses on the generation of intelligently decimated, two-manifold triangular meshes and the subsequent geo-referenced 3D interpretative mapping of these surfaces. Furthermore, all applications can be considered low- and even no-cost, making this a readily implemented processing and interpretation workflow. Additionally, all software packages are easy to learn and flexible enough for implementation in any existing mixed software pipeline.     

The Nice Musical Chairs Model: Exploring the Role of Competition and Cooperation Between Farming and Herding in the Formation of Land Use Patterns in Arid Afro-Eurasia

Following a strictly theory-building approach, we developed an agent-based simulation model, the Nice Musical Chairs model, to represent the competition between groups of stakeholders of farming and herding activities in the arid Afro-Eurasia. The model deepens the questions raised by the results of our former model, the Musical Chairs model, and further introduces three socio-economic mechanisms, which modulate the behavior and performance of stakeholders and their groups. First, we define land use pairing as the awarding, regarding productivity, of any direct cooperation between farming and herding within a group. Second, group management is modeled as the prerogative of a group leadership to manage stakeholders to pursue a particular proportion between farming and herding. Third, we introduce restricted access to pasture as the engagement in territorial control of rangelands in opposition to an open access regime. An exhaustive exploration of scenarios and parameters placed the control over rangelands as the most significant factor in the formation of land use patterns, followed by land use management. While the effect of land use pairing is mild in comparison, it is still a significant factor in group selection and thus in the persistence of particular land use patterns in the long run.     

Potter’s Wheel in the Iron Age in Central Europe: Process or Product Innovation?

The use of a rotational device for forming ceramic objects represents a fundamental innovation in pottery technology. This work addresses aspects of the transmission of this technological innovation on the basis of technological and provenance analysis of Iron Age pottery in a selected region of Eastern Bohemia. The possible trajectories of the innovative process are approximated specifically through the polarities between product and process innovation and transmission of cultural traits in open and closed learning networks. Apart from standard methods of petrographic and geochemical analysis, this analysis employs innovative methodology for identification of pottery-forming techniques. The results indicate the effects of various mechanisms of cultural transmission which shaped the evolution of techniques in the Iron Age society. The technological changes can be explained by shifting accents on product and process performance characteristics in changing selective environments.     

Dynamic Trajectories,Adaptive Cycles,and Complexity in Culture Change

Trends in interdisciplinary research over the last two decades have opened new perspectives and pushed forward our understanding of how complex social systems function. This study explores several theories of social change that have emerged from increasingly interdisciplinary perspectives in combination with complexity theory. Resilience theory and related concepts of adaptive cycles and panarchy are now being applied extensively to the study of a variety of human social systems. However, there is still the need to further explore the implications of how human systems differ from the ecologies of other species. A case study drawn from early polity formation in Inner Asia is used to assess the effectiveness of differing approaches. Certain theoretical gaps are described and a series of concepts within a theory of dynamic trajectories are proposed that focus on high-level patterns of social change. The basic elements of the theory include dynamics of the scope and scale of polities, the probability space in which change occurs, and the strands or bundles of social and cultural characteristics that represent the substance of trajectory. As the trajectory patterns manifest, they envelop constraints and opportunities influencing future patterns. Agent-based models are used to illustrate aspects of the dynamic trajectory theory, especially economic decision-making within specific landscapes and control hierarchies in the context of competing polities. Rather than repeating cycles, the results reveal reorganization modes highlighting the significance of continuity and opportunity in social change.     

Unsettling Time: Persistence and Memory in Spanish Colonial Peru

In this paper, I explore the politics of memory during the Toledan reforms—a series of ambitious administrative changes legislated in colonial Peru between 1569 and 1581, by viceroy Francisco de Toledo. At the center of Toledo’s project was an initiative to resettle the entire native population of the audiencias of Lima and Charcas into a series of planned towns called reducciones. This movement—reducción—sought to transform Andean indigenous peoples into subjects of the Catholic Church and the Spanish crown through a series of explicitly spatial operations, including regional population nucleation and settlement planning. But the terms of these changes were also temporal: as reducción shaped landscapes and built environments, it also sought to transform indigenous historicity, bringing native peoples into the Era of Christ and carefully regulating the social institutions and practices by which they accounted for their pasts. The Toledan reforms therefore present a clear example of one empire’s attempts to subjugate conquered peoples through mnemonic practices. Yet archaeological research in one corner of the viceroyalty—Peru’s Zaña valley—suggests that the story of how indigenous memories were actually shaped during the course of resettlement and its aftermath was far from straightforward. To understand these transformations, I argue that we must explore not only the short-term dialectic of Spanish designs and their indigenous responses, but also the “afterlives” of reduccion in the 17th and 18th centuries. Over the longer term, reducción achieved staying power through a series of unanticipated pathways, in which landscape change, demography, and indigenous agency all played essential roles. I argue that these developments ultimately resulted in much more complex forms of remembering than those implicit in reducción legislation and that they underscore the importance for archaeological studies of memory of attending both to the materiality of imperial landscapes and long-term processes of subject formation.     

Site Interiography and Geophysical Scanning: Interpreting the Texture and Form of Archaeological Deposits with Ground-Penetrating Radar

The remarkable potential of geophysical scanning—to assess the internal variability of sites in new ways, to highlight important phenomena in the field, to exercise co-creation of interpretation and commitment to minimal destruction of community partners’ resources, and to aid in the practice of due diligence in avoiding desecration of the sacred—continues to be underutilized in archaeology. While archaeological artifacts, features, and strata remain primary foci of archaeological geophysics, these phenomena are perceived quite differently in scans than in visual or tactile exposures. In turn, new registers of site exploration afforded by geophysical prospection may be constrained by the language of site excavation and visual observation, requiring adjustments in the ways of thinking about and describing what the instruments are measuring. The texture and form of site deposits as rendered in ground-penetrating radar scans can be examined in detail prior to making interpretations of cultural features or stratigraphy. Far more than simple “anomalies” demanding our attention for excavation, patterns in geophysical data can be the focus of extensive archaeological analysis prior to, in conjunction with, or independent from excavation.     

Volcanic Glass and Iron Nails: Networks of Exchange and Material Entanglements at Late Prehispanic and Early Colonial Achiutla,Oaxaca, Mexico

In this paper, I examine how indigenous residents of the community of Achiutla—located in the Mixtec region of Oaxaca, Mexico—utilized long-distance trade routes between central Mexico and the Pacific coast, spanning the Postclassic (900–1521 CE) and Early Colonial (1522–1650 CE) periods. The maintenance of prehispanic interregional trade connections by native peoples allowed them to both continue traditional industries like those involving obsidian, while also facilitating their adoption of new types of material culture introduced from Europe. Over the long term, however, I suggest that entanglements in these economic networks had unintended consequences, which possibly included the demise of the prehispanic obsidian industry.