Through the Glass Darkly: Prehispanic Obsidian Procurement and Exchange in Southern Peru and Northern Bolivia

Recent discovery of the major geological sources of Central Andean obsidian permits a new understanding of the patterns of obsidian procurement and exchange by the Prehispanic societies of southern Peru and northern Bolivia. Based on the trace element analysis of obsidian artifacts from 160 archaeological sites, it can be established that the two major deposits of obsidian were being exploited by 9400 BP, and that volcanic glass was being transported over long distances throughout Andean prehistory. Inhabitants of the Cuzco region acquired most obsidian from the Alca source in central Arequipa, while those in the high plateau surrounding Lake Titicaca obtained most obsidian from the Chivay source in southern Arequipa. Obsidian evidence suggests close ties between the Cuzco and Circum-Titicaca regions throughout prehistory, except during the Middle Horizon (ca. 1400–1050 BP), when the expansion of the Huari and Tiahuanaco states disrupted this pattern.     

Colonial Institutions: Uses,Subversions, and Material Afterlives

Archaeologically based explorations of colonialism or institutions are common case-studies in global historical archaeology, but the “colonial institution”—the role of institutions as operatives of colonialism—has often been neglected. In this thematic edition we argue that in order to fully understand the interconnected, global world one must explicitly dissect the colonial institution as an entwined, dual manifestation that is central to understanding both power and power relations in the modern world. Following Ann Laura Stoler, we have selected case studies from the Australia, Europe, UK and the USA which reveal that the study of colonial institutions should not be limited to the functional life of these institutions—or solely those that take the form of monumental architecture—but should include the long shadow of “imperial debris” (Stoler 2008) and immaterial institutions.     

Maize,beans and the floral isotopic diversity of highland Oaxaca,Mexico

Oaxaca, Mexico has been inhabited by humans for over 10,000 years. From the time of earliest habitation, this environment provided a wide floral subsistence to its human inhabitants, notably documented at the cave site of Guila Naquitz. Light stable isotopes, primarily carbon and nitrogen, have been used in dietary and environmental reconstructions throughout Mexico and Central America. We report a large isotopic study of wild and market plants from Oaxaca that demonstrates 1) overlapping δ¹³C values of C4 plants, including maize, and plants that utilize the Crassulacean Acid Metabolism (CAM) pathway for biosynthesis, 2) the existence of a significant C4 grass biomass, 3) the lack of isotopic separation in the δ¹⁵N of legumes and non-leguminous plants and 4) the increase in the nitrogen isotopic composition of crop plants relative to wild plant averages. These four observations are potential complicating factors in interpretations involving the origins and spread of maize agriculture, the relative amount of maize in the diet and assessments of trophic level or meat contributions to the human diet.     

Attribute-Based Seriation of Postclassic and Early Colonial Sherd Collections from the Basin of Mexico

Abstract

Seriation of ceramic collections based on diachronic changes in formal and surface treatment attributes offers advantages over type-based approaches when dealing with small collections. Individual attributes may be recordable where types (constellations of attributes) are not, increasing the quantity of chronological information that can be inferred. In addition, different classes of attributes (e.g., decorative, formal, surface treatment) highlight distinct processes and changes related to pottery production, consumption, and use, and provide a basis for finer-resolution seriation results. This paper outlines a procedure for attribute-based seriation analysis by detecting time-sensitive attributes and assigning sherd collections to temporal phases using clustering and ordination techniques, crosschecked with discriminant analysis. The results indicate a five-phase sequence for Middle-Late Postclassic and Early Colonial period collections from the Basin of Mexico (ca. A.D. 1200–1625).     

Quarantine Matters: Colonial Quarantine at North Head,Sydney and Its Material and Ideological Ruins

Australia’s quarantine regulations have their roots in colonial practice. This paper is concerned with the “matter” of quarantine—its location, spatialization, and materialization—and the ways in which it contributed to the colonial agenda. Through an exploration of Sydney’s North Head Quarantine Station, quarantine is shown to be a technology through which the colony and the continent were framed as simultaneously pure and vulnerable. These colonial roots of quarantine practice are then brought back to the present, drawing on Stoler’s (2008) concept of “imperial debris” to contemplate the contemporary ruins, both material and ideological, of colonial quarantine practice.     

Cultural dynamics and ceramic resource use at Late Bronze Age/Early Iron Age Troy,northwestern Turkey

Changes in resource use over time can provide insight into technological choice and the extent of long-term stability in cultural practices. In this paper we re-evaluate the evidence for a marked demographic shift at the inception of the Early Iron Age at Troy by applying a robust macroscale analysis of changing ceramic resource use over the Late Bronze and Iron Age. We use a combination of new and legacy analytical datasets (NAA and XRF), from excavated ceramics, to evaluate the potential compositional range of local resources (based on comparisons with sediments from within a 10 km site radius). Results show a clear distinction between sediment-defined local and non-local ceramic compositional groups. Two discrete local ceramic resources have been previously identified and we confirm a third local resource for a major class of EIA handmade wares and cooking pots. This third source appears to derive from a residual resource on the Troy peninsula (rather than adjacent alluvial valleys). The presence of a group of large and heavy pithoi among the non-local groups raises questions about their regional or maritime origin.     

Geospatial modeling of pedestrian transportation networks: a case study from precolumbian Oaxaca,Mexico

Using accumulated cost surfaces and various pathfinding techniques within Geographic Information Systems (GIS) software, archaeologists and other spatial scientists have developed increasingly sophisticated models of human movement. Despite their utility, these approaches can be limited because standard GIS software cannot model movement (1) from many origins to many destinations or (2) without specific origins and destinations. Absent these capabilities, it is particularly difficult to model networks of movement over a given tract of land if you are interested in obtaining a more general sense of movement dynamics, not specific site-to-site patterns. In this paper, we present an innovative way of modeling past movement that generates both natural-looking networks and also indicates the degree of traffic that may have existed on any particular segment of those networks. The “From Everywhere to Everywhere” (FETE) model generates networks based on topography and landcover without requiring that origin and destination points be supplied in advance. We apply the FETE model to a case from the southern Mexican state of Oaxaca, a region that has extensive archaeological and ethnohistoric data sets that serve as a test of the efficacy of our technique. A comparison of the FETE output with known late precolumbian and early colonial movement corridors indicates that the method is effective and should be useful for modeling networks in other areas.     

Coming of Age: Law,Sex and Childhood in Late Colonial India

This article revisits child‐marriage legislation in colonial India between 1891 and 1929 to re‐envision the ‘child’ as a subject constituted by laws governing sex, rather than as an a priori object requiring protection from patriarchal sexual norms. Focusing on the digital construction of the child in the twentieth century, this essay introduces a new angle from which to examine recent conclusions regarding child‐marriage reform in India. By drawing attention to an understudied figure, this article demonstrates the ways in which the problem of the child might transform understandings of the nation and its women; the universe of rights and the location of culture and the place of age as number in the formulation of legal subjectivities, colonial governmentality and humanitarian accounting in late colonial India.     

3400 years of agricultural engineering in Mesoamerica: lama-bordos of the Mixteca Alta,Oaxaca, Mexico

The origins of early Mesoamerican agricultural techniques are not well established. Our charcoal-derived radiocarbon chronology dates cross-valley check dams, or lama-bordos, buried by up to 11.5 m of sediment in arroyos near Coixtlahuaca, Oaxaca, Mexico. Now it is clear that people in highland Mexico built lama-bordos at least 3400–3500 years ago, several hundred years earlier than previously dated engineering systems in Mesoamerica. Lama-bordo systems evolved as intensively and extensively managed landscapes coeval with climate shifting to more arid conditions. They provide clear examples of human-produced stratigraphy and artificial landscapes (stair-stepped valleys). More importantly, these lama-bordo systems signal a major cultural tipping point toward sedentary agricultural life and solidify our understanding of the Neolithic transition in Mesoamerica.     

Late Classic Maya lithic production and exchange at Rio Bec and Calakmul,Mexico

Abstract

The organization of production and exchange of everyday lithic items is important in defining Classic period lowland Maya economic organization, but the current debate relies on the study of a few lithic workshops, whereas little is known about the consumers’ quotidian acquisition of everyday tools. I suggest looking at the problem from the point of view of the household and distinguishing local from nonlocal production by comparing experimental and quantitative data. Examination of the chert collections from households at Rio Bec and Calakmul enabled me to distinguish two different types of chert biface production and distribution during the Late Classic period (a.d. 650–800), namely by means of markets and itinerant craftsmen. Both sites had very different political organizations, but households from both cities acquired lithics through similar networks, showing that this particular aspect of the domestic economy probably had little to do with political power and centralization in the region.     

Testing the accuracy of portable X-ray fluorescence to study Aztec and Colonial obsidian supply at Xaltocan,Mexico

This article demonstrates the accuracy of non-destructive portable X-ray fluorescence (pXRF) for the study of obsidian in central Mexico. Obsidian sources were identified for a sample of 103 artifacts from the site of Xaltocan, which spanned the rise and fall of the Aztec empire and the first centuries of Spanish colonial rule (AD 900–1700). Sources were assigned by comparing pXRF measurements with previously published source data and were verified using the standard techniques of laboratory XRF (lXRF) and instrumental neutron activation analysis (INAA). Additional tests of potentially confounding factors show that neither length of read time, presence of surface residue, nor incomplete detector coverage due to small artifact size compromised our ability to attribute sources to artifacts. Concave surfaces did decrease the accuracy of readings because of the greater distance between the artifact and the detector. Our results provide new insight into the stability of supply networks and markets well into the Colonial period as well as the homogenizing tendencies of the Aztec market system.