Silver lining: evidence for Inka silver refining in northern Chile

Prehistoric silver purification using lead cupellation has been documented in multiple places throughout the Andes, but direct evidence of the Inka use of this technology has remained elusive. In this study, we use X-ray fluorescence, scanning electron microscopy, and electron-microprobe analysis to document direct evidence of Inka period (AD 1400–1532) silver purification using lead cupellation in the Tarapacá Valley of northern Chile. Local metalworkers used wind-driven huayra furnaces to produce pure lead metal, sustaining temperatures of ca. 900–1100 °C to smelt lead-bearing ores that may have included galena. The lead metal was then used in open-vessel cupellation of silver-bearing ores, some of which may have been cupriferous and derived from the nearby Inka mines at Huantajaya. Phase analyses of the slagged interiors of bowl-shaped ceramic vessels used for cupellation indicate that the metalworkers maintained the oxidizing environment and temperatures between 800 and 1100 °C requisite for cupellation. We argue that the Inka introduced this technique to Tarapacá metalworkers. The absence of finished silver artifacts in local valley contexts suggests that the refined silver was removed from the valley for use elsewhere in the empire.     

Expansionary dynamics of the nascent Monte Albán state

The Monte Albán state emerged in the Valley of Oaxaca, Mexico, between 300 and 100 BC. Archaeological evidence indicates that this case of state formation was linked to the territorial expansion of the Monte Albán polity. We argue that rulers at Monte Albán adopted an expansionist strategy in order to acquire resources they could use to fund campaigns against rival polities and to bolster their position in a competitive sociopolitical environment. Logistical challenges associated with expansion favored experimentation with new (state) forms of administrative control, while importation of exotic goods contributed to the development of social stratification. Multiple lines of evidence—including excavation data from Tilcajete and Yaasuchi, survey data from the Sola Valley, and a GIS model of potential transportation routes—indicate that the Pacific coast of Oaxaca likely was a target of Monte Albán’s expansion. Our model explains the variable nature of that expansion and its impact on the developmental histories of neighboring regions, as well as the synergistic increase in complexity among interacting societies in Late Formative Oaxaca. Cross-cultural comparison demonstrates that key factors in the formation of the Monte Albán state (e.g., status rivalry, inter-polity conflict, territoriality, militarism, trade) are evident elsewhere in the world.     

Signs of sinusitis in times of urbanization in Viking Age-Early Medieval Sweden

The influence and possible negative impact on sinus health of living conditions in rural and urban environments in Viking Age (AD 800–1050) and Early Medieval Sweden (AD 1050–1200) is investigated. Skeletal samples from 32 rural settlements in the Mälaren Valley (AD 750–1200) and burials in the nearby proto-urban port of trade Birka (AD 750–960) are examined. Based on the diagnostic criteria for maxillary sinusitis used in earlier studies, the results show that there is no significant difference in the prevalence of signs of sinusitis between the two materials (i.e. the Mälaren Valley versus Birka). Consequently, this provides no evidence that living in a proto-urban environment had a negative impact on sinus health. However, when compared with previously studied samples from the early medieval town Sigtuna, dated to AD 970–1100, the populations of the Mälaren Valley and Birka show significantly lower frequencies of bone changes interpreted as chronic maxillary sinusitis (95%, 70% and 82% respectively). This implies that the urban environment of Sigtuna could have led to impaired sinus health. There is also a significant difference between males and females in the Birka material, in which more females (100%) than males (68%) were affected. A gender based differentiation in work tasks is suggested by this, or exposure to environmental risk factors that affect sinus health. No difference between males and females could be detected in the samples from the Mälaren Valley and Sigtuna.     

The Indus Valley Tradition of Pakistan and western India

Over the last several decades new sets of information have provided a more detailed understanding of the rise and character of the Indus Civilization as well as its decline and decentralization. This article begins with a summary of the major historical developments in the archaeology of the Indus Valley Tradition and a definition of terms found in the literature. A general discussion of the environmental setting and certain preconditions for the rise of urban and state-level society is followed by a summary of the major aspects of the Harappan Phase of the Indus Valley Tradition. This summary includes discussions of settlement patterns, subsistence, architecture, trade and exchange, specialized crafts, language, religion, and social organization. The Localization Era or decentralization of the urban centers is also addressed.     

An evolutionary model of social change in the Middle Ohio Valley: Was social complexity impossible during the late woodland but mandatory during the late prehistoric?

We present an evolutionary model of social change in the Middle Ohio Valley during the Fort Ancient period (AD 1000–1650), primarily relying on an application of Winterhalder’s (1986) and Kelly’s (1995) evolutionary ecology model of cultural responses to environmental variability. We predict changes in social organization, political complexity, and patterns of stylistic similarity. As the environmental background for our model we employ recently published moisture data. By iteratively applying the synchronic Winterhalder–Kelly model we are able to predict a sequence of general trends that agree with much current interpretation of Fort Ancient development. Specifically, the model leads us to expect increasing village size, the development of regional traditions, and the development of leadership roles and a region-wide style Horizon around AD 1400. However, our model provides the ability to make testable predictions that deviate from the accepted cultural history and predicts that the Middle Ohio Valley and the groups referred to as Fort Ancient were far from homogenous.     

Geographical Variation of Subsistence Strategies in Early Mediaeval Populations of Southwestern Germany

The investigation is based on bone element data of early Mediaeval human skeletal samples from eight differing environmental conditions in lowland and mountain range localities of southern Germany. Reconstruction of plausible subsistence strategies revealed close correlations with the respective ecological potentials of the localities as indicated by proxy data on geomorphology, climate, and soil quality. In general, lowland situations showed mixed dietary patterns with a prevalence of agricultural farming, whereas in mountainous areas the emphasis was on dairy farming production and horticulture. This points to subsistence activities during the early Middle Ages that are closely adjusted to differing environmental conditions. An obvious deviation from this pattern in one locality (Kirchheim unter Teck) is explained in terms of successful socio-cultural buffering of limited but effective exploitation of the natural setting.     

The origins of sedentism and farming communities in the Levant

Particular geographic features of the Mediterranean Levant underlie the subsistence patterns and social structures reconstructed from the archaeological remains of Epi-Paleolithic groups. The Kebaran, Geometric Kebaran, and Mushabian complexes are defined by technotypological features that reflect the distributions of social units. Radiocarbon dating and paleoclimatic data permit us to trace particular groups who, facing environmental fluctuations, made crucial changes in subsistence strategies, which, in the southern Levant, led to sedentism in base camps on the ecotone of the Mediterranean woodland-parkland and the Irano-Turanian steppe. The establishment of Early Natufian sedentary communities led to a regional change in settlement pattern. The relatively cold and dry climate of the eleventh millennium B.P. forced Negev groups into a special arid adpatation. The early Holocene onset of wetter and warmer conditions favored the earliest Neolithic (PPNA) development of village life based on the cultivation of barley and legumes, gathering of wild seeds and fruits and continued hunting.     

Moving peoples,changing diets: isotopic differences highlight migration and subsistence changes in the Upper Mun River Valley,Thailand

The dramatic growth of dietary isotope studies in archaeological literature attests to the significant potential this technique has for shedding light on past societies. Human diet reflects complex, inter-linked factors such as status, cultural preferences or environmental constraints on food production. In this study dietary isotope analysis is used to examine the human skeletal remains from Ban Non Wat, northeast Thailand. The study aims to use isotopic data to give insight into patterns of migration and subsistence strategy during prehistory. Ban Non Wat is the most comprehensively excavated site in the Upper Mun River Valley (UMRV), and understanding of prehistoric society in this area is crucial to answering questions of how social complexity arose in the region. Carbon isotope analysis has highlighted migrant individuals invisible to strontium isotope analysis and shown links between unusual burial practice and differences in diet. Results also indicate that diet changed substantially through time, with more reliance on rice in the Bronze Age, correlated with an increase in social differentiation. There is a move away from reliance on rice agriculture in the Iron Age, a time when oxygen isotopes show that environmental conditions were becoming drier, possibly resulting in rice agriculture becoming less viable.     

The zooarchaeology of exclusion and expropriation: Looking up from the lower city in Late Bronze Age Hazor

The collapse of complex societies is a recurring theme in archaeological and historical scholarship. Zooarchaeological investigation, conventionally applied in recent studies to detect environmental degradation resulting in resource stress, is employed here to study the social conditions leading to the decline of the powerful Bronze Age city of Hazor, located in the northern Jordan Valley, Israel. The results of the analysis of faunal remains from the lower city show that the exclusion of its residents from ideological use of animals and their impoverishment by elite livestock expropriation preceded other material manifestations of sociopolitical decline in the city. The results are encouraging in respect to the prospective value of zooarchaeology for investigating collapse not directly caused by subsistence failures.     

Treponemal Disease,Tuberculosis and Subsistence‐settlement Pattern in the Late Woodland Period West‐central Illinois

In later pre‐Columbian prehistory (post AD 1000), the adaptation and intensification of maize agriculture and its correlate of aggregate village settlement (i.e. Mississippianization) is temporally and geographically variable. In the Midwest, consequential to the florescence of the major ceremonial centre of Cahokia (AD 1050–1300), the Mississippi River Valley alluvial plain in Illinois, known as the American Bottom, became a core area of this subsistence‐settlement change. Much archaeological research has traced aspects of this transition in the Lower and Middle Illinois River Valley, but little is known outside of these areas. A skeletal sample from the remote hinterland area of the Upper Mississippi River in west‐central Illinois was examined for arguable paleopathological correlates of sedentism (treponemal disease) and Mississippianization (tuberculosis). The Schroeder Mounds (AD 900–1100) adult skeletal sample (N = 53) exhibited a high frequency of treponemal disease (13.2–15.1%). This result is consistent with paleopathological literature linking a 9+ % pre‐Columbian North American prevalence with sedentism, challenging archaeologically based inferences that the hinterland was occupied by mobile forager‐horticulturalists. A hallmark of Mississippianization is the presence of diagnostic cases of tuberculosis. No cases were observed in the Schroeder sample, suggesting a pre‐Mississippian subsistence‐settlement pattern. Copyright © 2013 John Wiley & Sons, Ltd.     

Territoriality,social boundaries and ancestor veneration in the central Andes of Peru

This article examines the relationship between social boundaries, territoriality and ancestor veneration during the Late Intermediate Period (1000–1450 AD) in the Rapayán Valley of the Central Andes of Peru. Constructing upon recent theoretical work on social boundaries and territoriality combined with the analyses of early historical sources, I argue that the distribution of various types of above-ground mortuary structures across the landscape was a powerful mechanism of social control through space that not only served to assess territorial rights, but also to confine or exclude people from a bounded space by the delimitation of social boundaries. I sustain that above-ground mortuary structures reflected a growing concern for territorial behaviors during the LIP that allowed household members, kinship groups and/or political units, according to varying contexts, to draw social boundaries between insiders and outsiders by reifying identity and social solidarity through ancestors worship. Within the broader Andean context, I suggest that the widespread distribution of mortuary monuments across the landscape provided the political landscape with an ideology of fragmentation which encouraged the distinction between insiders and outsiders and thus promoted group identity through social exclusion from a geographical point of view at many different levels.     

Game Resources, Social Interaction, and the Ecological Footprint in Southwest New Mexico

Humans have modified their environments for millennia, but the role of these impacts on economic and social strategies among communities can be difficult to assess. This is due in part to the difficulty of quantifying impacts, which hinders our evaluations of the effects of different resource acquisition strategies and impairs attempts to understand competing demands on resources and their effects on the evolution of social relations. In this paper we employ footprint analysis, a tool used in ecology, to assess the impact of prehistoric subsistence farming communities on the environment, specifically faunal resources. We use footprint analysis to quantify the impact of various strategies of game acquisition by Classic Mimbres period (AD 1000-1130) farmers in the North American Southwest. Assessments are then employed in identifying changes in social relations among communities that may have contributed to settlement changes in the region.     

Radiocarbon dating of prehistoric hearths in alpine northern Sweden: problems and possibilities

The chronology of prehistoric Sami settlement sites has previously been established by conventional radiocarbon dating of bulk charcoal samples associated with hearths from sunken hut floors (stállo-foundations). Here we present results of a comprehensive dating exercise of stállo-foundations in the alpine area of northern Scandinavia using Accelerator Mass Spectrometry (AMS) radiocarbon dating of charcoal. Over a 3 km² study area, AMS calibrated ages of hearth charcoal from 22 stállo-foundations across 12 sites securely date these features to between cal. AD 640 and AD 1180. Only small variations in age were found between charcoal samples from different areas of a given hearth. Statistical analysis of all the charcoal AMS radiocarbon dates obtained reveals that 12 stállo-foundations across nine sites are contemporaneous and date to the Viking Period (AD 800–AD 1050). The tightly constrained AMS-based chronology of stállo-foundations contrasts with the existing chronology based on conventional radiocarbon analysis, which places these features within a significantly greater time-frame of between AD 600 and AD 1900, with most dates ranging between AD 800 and AD 1350.This discrepancy is likely to result from the necessity of collecting composite hearth charcoal particles, which may originate from different phases of occupation, in order to achieve the required final carbon content for conventional radiocarbon analysis. We argue that the new AMS-based radiocarbon chronology of stállo-foundations presented here supersedes the existing chronology based on conventional (Gas Proportional counting) radiocarbon analysis and we advocate the use of AMS radiocarbon dating in future hearth investigations.     

Environmental change,agricultural innovation,and the spread of cotton agriculture in the Old World

Recent excavations at the site of Kara-tepe in northwestern Uzbekistan revealed evidence for the production of cotton (Gossypium sp.) in domestic contexts dated to ca. 300–500 AD. These archaeobotanical remains help to document the spread of Old World cotton production, and predate the existing evidence for its cultivation in Central Asia. The context in which these remains were found—in temperate Eurasia at a time of intense environmental and social change—suggests that the spread of cotton agriculture to this region occurred when new plant varieties were incorporated into domestic production regimes as part of local adaptive strategies. The development and transmission of cotton as a global cultigen was initiated by these small-scale innovations aimed at the expansion of economically and environmentally sustainable subsistence practices in Central Asia. Subsequent worldwide transmission occurred when emerging empires helped to spread cotton agriculture more widely across the Old World.     

Cultural Niche Construction and Remote Sensing of Ancient Anthropogenic Environmental Change in the North Coast of Peru

Archaeological land use results in the modification of natural environments according to cultural templates and strategies. Deeply entrenched environmental legacies can result from such “niche construction,” influencing subsequent cultures and continuing to resonate in modern ecological function. These changes can be better understood through archaeological remote sensing.Here, I describe spectral responses of densely vegetated sugarcane fields in the Chicama Valley (north coast of Peru) to archaeological features and associated anthropogenic soils (anthrosols). Ongoing satellite remote sensing documents approximately 440 previously unrecorded major archaeological monuments and smaller features within a 310 km² sample of the Chicama Valley The majority of these date to the Moche–Chimu periods (ca. AD 300–1400), with others dating to the Cupisnique–Colonial periods. The newly recorded features are significant for accurately reconstructing the socio-ecological history of anthropogenic environmental change in the region.In addition to advancing analyses of archaeological settlement, these results reveal how prehispanic land use legacies result in persistent anthropogenic niches that can affect modern agricultural potentials. The relationships between anthropogenic features and sugarcane development can be directly evaluated through vegetation indices and physically based image transforms. Phenological response is linked to long-term alterations in soil texture, organic-matter content, and moisture capacity. Past land use thus has a significant impact upon contemporary ecological function, resulting in anthropogenic microenvironments. As sugarcane increasingly is an important industrial crop, these results have the potential to be widely applied to archaeological and agronomic problems, including reconstructions of archaeological landscapes, understanding persistent anthropogenic environments, and mitigating heritage loss while potentially improving precision agriculture.     

Subsistence economics,family size,and the emergence of social complexity in hunter–gatherer systems in eastern North America

A consideration of ethnographic data, computational model results, and archaeological data suggest that changes in family-level economics coincident with subsistence intensification contributed to the emergence of social complexity among prehistoric hunter–gatherers in eastern North America by creating the conditions for a “rich get richer” scenario. Ethnographic data are used to construct a general computational model representing key person- and family-level behaviors, constraints, and decisions affecting the size and composition of hunter–gatherer families. Results from model experiments suggest that lowering the age at which children make a significant contribution to subsistence (e.g., through the broadening of the diet to include the kinds of mass-harvested, “low quality” foods that were increasingly exploited during the Archaic and Woodland periods) relaxes constraints on family size and makes large, polygynous families economically viable. Positive feedbacks between the productive and reproductive potentials of larger families produce right-tailed distributions of family size and “wealth” when the productive age of children is low and polygyny is incentivized. Size data from over 800 prehistoric residential structures suggest right-tailed distributions of family size were present during the Late Archaic through Middle Woodland periods. These distributions would have provided variability in family-based status that permitted the emergence of hereditary social distinctions.     

The dry tank: development and disuse of water management infrastructure in the Anuradhapura hinterland,Sri Lanka

We identify and offer new explanations of change in water management infrastructure in the semi-arid urban hinterland of Anuradhapura, Sri Lanka between ca. 400 BC and AD 1800. Field stratigraphies and micromorphological analyses demonstrate that a complex water storage infrastructure was superimposed over time on intermittently occupied and cultivated naturally wetter areas, with some attempts in drier locations. Our chronological framework, based on optically stimulated luminescence (OSL) measurement, indicates that this infrastructure commenced sometime between 400 and 200 BC, continued after Anuradhapura reached its maximum extent, and largely went into disuse between AD 1100 and 1200. While the water management infrastructure was eventually abandoned, it was succeeded by small-scale subsistence cultivation as the primary activity on the landscape. Our findings have broader resonance with current debates on the timing of introduced ‘cultural packages’ together with their social and environmental impacts, production and symbolism in construction activities, persistent stresses and high magnitude disturbances in ‘collapse’, and the notion of post ‘collapse’ landscapes associated with the management of uncertain but essential resources in semi-arid environments.     

Population and productivity in the teotihuacan valley: Changing patterns of spatial association in prehispanic central Mexico

Since its emergence earlier this century, cultural ecology has played a key role in attempts to understand the complex interrelations between cultural and environmental systems. Although rarely examined, a crucial aspect of cultural adaptation is the explicit spatial relationship between the distribution of human populations and the various resources available to them. In the following essay, we examine this particular question in terms of regional subsistence potential with settlement system remains from the Middle Horizon (Classic) and Late Horizon (Aztec) periods in the Teotihuacan Valley, Mexico. As a first step, traditional measures of association (Pearson's, Spearman's, and Kendall's) are employed to assess the point-to-point relationships between population and productivity potential. Then, recently developed randomization procedures are introduced and applied to evaluate the spatial association of these two variables. The results of these complementary avenues of analysis help to increase our understanding of the role of space in the cultural ecology of the prehispanic Teotihuacan Valley. In addition, they reaffirm the potentially powerful impact of cultural mechanisms on strategies of regional adaptation.     

Behavioral Ecology and Archaeology

Behavioral ecology is the study of adaptive behavior in relation to social and environmental circumstances. Analysts working from this perspective hold that the reproductive strategies and decision-making capacities of all living organisms—including humans—are shaped by natural selection. Archaeologists have been using this proposition in the study of past human behavior for more than 30 years. Significant insights on variation in prehistoric human subsistence, life history, social organization, and their respective fossil and archaeological consequences have been among the more important results.