Trade,tribute, and neutron activation: The colonial political economy of Xaltocan,Mexico

In Trade, Tribute, and Transportation, Ross Hassig argues that indigenous towns in the northern Basin of Mexico during the colonial period were largely self-sufficient. They traded with Mexico City mostly in elite goods, but for the most part they produced for their own subsistence or traded with nearby towns. Chemical characterization by instrumental neutron activation analysis (INAA) and portable X-ray fluorescence (pXRF) of ceramics and obsidian from post-conquest contexts in Xaltocan, a site in the northern Basin of Mexico, reveals that Hassig’s model is partly correct for describing Xaltocan. The town focused on trade with nearby towns and it produced some ceramics for local consumption. However, Xaltocan was hardly isolated and self-sufficient in the post-conquest period. Instead, the data suggest that the people of Xaltocan also obtained ceramics and obsidian from a greater variety of sources than under Aztec domination. Rather than being an isolated rural site, Xaltocan either increased its external connections and number of trading partners after the Spanish conquest, or it managed to obtain a greater variety of products than before through a bustling market system.     

Taken with a Grain of Salt: Experimentation and the Chemistry of Archaeological Ceramics from Xaltocan,Mexico

Neutron activation analysis (NAA) of ceramics from Xaltocan (n?=?651) displays high values for sodium and potassium and low concentrations of many transition metals and rare earth elements compared to other sites in the Basin of Mexico. Given that Xaltocan was situated on an island in the middle of a saline lake, the potential reasons for this chemical signature are diverse. On one hand, if the sodium and potassium were elevated due to some behavioral aspect of the potters, the Xaltocan chemical groups provide a glimpse at the behaviors of Xaltocan potters that permit more precise source designations. On the other hand, if this chemical fingerprint arose due to contamination in a saline post-depositional environment, the Xaltocan chemical groups would not be valid references for provenance studies. To evaluate these alternative hypotheses, we employ several lines of evidence: (1) comparison of the Xaltocan ceramics to over 5,000 NAA assays of clays and ceramics from the Basin of Mexico, (2) experimental doping of clays with water of different salinities and fired to different temperatures, (3) leaching experiments of archaeological pottery sherds (n?=?22) recovered from the site of Xaltocan, and (4) laser ablation–inductively coupled plasma–mass spectrometry of the clay and temper fraction of a small sample of Xaltocan ceramics to determine which component is responsible for the elevated sodium and potassium values. The results suggest that the high sodium and potassium values were present in the ceramic paste before firing. We then use these newly established reference groups to better understand the role of Xaltocan in the regional economy. The type of experimentation employed in this study has proven to be an important method for determining the behaviors of ancient potters and distinguishing them from post-depositional processes.     

Domestic economies and regional transition: Household multicrafting and lake exploitation in pre-Aztec Central Mexico

This article takes a micro-archaeology approach to investigating household production strategies using data derived from Early to Middle Postclassic (A.D. 900–1350) houses from Xaltocan, Mexico, an island capital in the northern Basin of Mexico. I examine household production strategies by integrating multiple lines of evidence including microartifacts, soil chemistry, and macroartifact remains to document a diversity of household production activities, including the manufacture of goods that are typically invisible archaeologically such as foods and perishable goods. Next, I consider changes in subsistence practices through time in order to understand household scheduling and labor allocation strategies. The results indicate that households in pre-Aztec Xaltocan not only pursued diverse economic strategies, but also engaged in multiple types of production activities, including the manufacture of food products and other utilitarian goods derived from lake resources. I conclude that households were fundamental to economic development in ancient political economies and were enmeshed in broader systems of power and networks of exchange.     

Mapping ancient chinampa landscapes in the Basin of Mexico: a remote sensing and GIS approach

This paper uses remote sensing data to document a raised field, chinampa system adjacent to the Postclassic kingdom of Xaltocan in the northern Basin of Mexico. Various forms of landscape information; historic records and maps as well as remote sensing; are considered to understand the chinampa system. The remote sensing data examined include 1950s aerial photographs, Landsat 7 data, and Quickbird VHR, multi-spectral imagery. This article evaluates the utility of each of these forms of data to identify buried chinampa features and integrates them in a GIS to produce a map of Xaltocan's chinampa landscape. Canals of various sizes and hydrological positions comprised the chinampas and integrated the system together. Occupying at least 1500–2000 ha, Xaltocan's chinampa system represents the largest pre-Aztec, chinampa system in the Basin of Mexico.     

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.     

Laboratory Notes,Laboratory Experiences,and Conceptual Analysis: Understanding the Making of Ohm's First Law in Electricity

Georg Simon Ohm's work in the field of electricity led to what is now considered to be the most fundamental law of electrical circuits, Ohm's Law. Much less known is that only months earlier, Ohm had published another law—one that differed significantly from the now accepted one. The latter entailed a logarithmic relation between the length of the conductor and a parameter that Ohm called “loss of force.” This paper discusses how Ohm came up with an initial law that he felt compelled to correct a few months later. We analyze Ohm's publication as well as his laboratory notes, relating them to our own laboratory experiences while using the replication method to study his work. We also discuss the conceptual background of Ohm's work. We conclude that he was significantly influenced by French studies in the field of electricity, most notably the ones by Charles Augustin Coulomb.     

Spiro Mounds,Oklahoma: Dental Evidence for Subsistence Strategies

Spiro Mounds was a ceremonial complex located on the Arkansas River, situated in a natural corridor between the Southeast, the Plains, and the Southwestern United States. Considered a quintessential Mississippian site (ad 1000–ad 1450), Spiro was strategically placed as a cultural gateway. Here, dental evidence is presented to aid in the determination of dietary regime and overall population health. The hypothesis regarding the delayed transition to maize agriculture in the Arkansas River Valley will be tested through population comparisons of dental remains. This study will expand the bioarchaeological investigation of a region that has had limited systematic examination. Statistical analysis showed a significant difference between Alluvial, Upland, and Plains environmental zones, and the pattern of dental pathology. Assaults on the dentition at Spiro are moderate. Caries and hypoplasia rates fall just under but approaching those expected for agricultural populations (57% and 49%, respectively). The high number of occlusal caries indicates slower cariogenic destruction and a slower attrition rate. Ante mortem tooth loss was low (18%), with moderate dental attrition (61%). The dental analysis of Spiro Mounds reveals a population with little generalised stress resulting from environmental or sociocultural influences. Comparisons of Spiro to other larger sites in the Mississippian sphere is revealing regarding widespread cultural traditions and their affect on population health; Spiro's unique circumstances give evidence of a population in transition to maize agriculture, but not fully committed to it. Higher status individuals were slower to change from the subsistence strategies that had made them biologically successful. Recent isotope data support this conclusion. The delayed role of maize agriculture at Spiro Mounds, as well as its ideal location within the Mississippian sphere, indicates a different social evolution than other influential Mississippian centres. Copyright © 2015 John Wiley & Sons, Ltd.     

Mano size,stable carbon isotope ratios,and macrobotanical remains as multiple lines of evidence of maize dependence in the American southwest

While the level of agricultural dependence affects many aspects of human adaptation, estimating levels of dependence on maize through traditional archaeological techniques is problematic. Here we compare various measurements of manos (e.g., grinding surface area), macrobotanical evidence of maize use, and human collagen stable carbon isotope values from six regions of the American Southwest, encompassing 16 phases, as a means of assessing the power and limits of each approach for considering agricultural dependence. The analysis of each data class is considered separately, taking into account formation processes and arguments linking data and inferences. Correlations among the three data classes suggest that mano area and maize ubiquity can be considered ordinal measures of agricultural dependence, but Southwestern stable carbon isotope data have the analytical potential only to discriminate between little or no maize use and substantial maize use. The formation processes and linking arguments associated with each method must be considered when multiple lines of evidence are integrated in order to make sound behavioral inferences. Our results suggest that there were at least three patterns in the adoption of farming in the Southwest: early substantial use followed by continuous increasing maize dependence, initial intensive dependence with little change in later periods, and a long period of minor use followed by substantial dependence.     

Agricultural slope management and soil erosion at La Laguna,Tlaxcala, Mexico

Several superimposed systems of agricultural terracing are preserved at the archaeological site of La Laguna in central Mexico. Excavations uncovered complex stratigraphic sequences of terrace fills and colluvial deposits. Their chronology was established by radiocarbon, optically stimulated luminescence (OSL), and the presence of diagnostic features and artifacts. The Formative occupations of the site (ca. 600–400 BC and 100 BC–AD 100) resulted in severe erosion and exposure of indurated subsoil horizons. In the Middle to Late Postclassic (AD 1150–1520) stone-walled terraces were built to recover the degraded slopes for cultivation. Renewed reclamation works have been undertaken since the Colonial period, eventually taking the form of sloping-field terraces with berms planted in maguey. The reconstructed sequence of local land use underscores the risks of dating agricultural features by association with sherd scatters, as well as the complexity of the relationships between demographic variables, agricultural intensity and terracing.     

Pet Sounds: Subsystems,Regimes, Policy Punctuations,and the Neglect of African American Farmers, 1935–2006

Punctuated equilibrium theory (PET) has reoriented the study of public policy and American politics in particular. In this study, we documented how a policy punctuation that appears to take hold at the macro level of the polity in the form of a policy regime has difficulty penetrating subsystem politics. We drew on subsystems theory, PET, and the latest work on policy regimes to document the resistance of the agriculture subsystem to efforts to add a civil rights dimension to agriculture policy between 1935 and 2006. We concluded that the issue evolution of agricultural support programs, and their insulation from civil rights policy, is a prime example of how subsystems use negative feedback to resist change.     

Land,Labour and Ambivalence: Lutheran Missionaries Managing Land Disputes at Cape Bedford Mission

This article provides a close reading of a land dispute between Lutheran missionaries at Cape Bedford mission during the 1920s and 1930s in order to extrapolate understandings of missionary ambivalence, power, and privilege within colonial processes of dispossession. The main contention is that missionaries felt compelled to promote Aboriginal engagement in agricultural labour in order to ensure that they could visibly demonstrate the land's productivity, and then maintain access to it. It also contributes to understandings about missionary power and privilege within the colonial context and how at times the authority of missionaries was undermined by bureaucracy. It points to the discrepancies between settler and humanitarian discourses around Indigenous land use in Queensland's north during this period, and the relationships between missions and the state.     

The Mobile Politics of Emotions and Social Movement in Oaxaca,Mexico

In light of recent debates between affect and emotions in geography, this article focuses on how the emotional landscape of spatial struggles in Oaxaca articulated people together, thereby generating solidarities and a collective sociality offering the potentiality of interconnection that geographers of affect emphasize. Through an analysis of a women's march, I demonstrate how social movements move people, mobilizing them both physically and emotionally, with effects that go beyond a movement's political demands. Engaging with how emotions do movement‐building work means going beyond a focus on the relational construction of emotions and arguing instead for their collective agency, including their power to transform participants into activists. Highlighting the centrality of spatial struggles and emotions to the shifting, mobile politics of social movements brings into sharp relief the importance of a situated, historical analysis for theorists romanticizing the emancipatory possibilities of a revolutionary transnational articulation between social movements.     

A state of suspended animation: Urban sanitation and water access in Nogales,Sonora

With its hilly terrain and fast-paced growth, Nogales, Sonora, located on the US-Mexico border, is an extremely challenging place for sanitation and potable water provision wherein access to basic services is highly uneven. The labor demands of maquiladoras (typically, foreign-owned assembly plants) draw a steady influx of newcomers to the city, many of whom must turn to land “invasion” to create spaces for affordable housing. With tacit government approval, invasions occur on inexpensive, often topographically precarious land. Officials tend to frame these spaces as “illegal,” and, by extension, those who inhabit them, as existing outside the realm of formal governance. Despite such views, in this paper we understand the distinctions drawn between so-called formal and informal urban governance to unfold along two key axes: regularization of informal land titles and piped water and sanitation. We show how colonia residents feel caught in a state of suspended animation between hope for full urban service provision and trepidation that it will ever reach them. This ambiguity is visible in residents' and government officials' interactions with each other and the public services landscape, and in the unevenness of services provision. We critique the claim that such ambiguousness reflects an instrumental approach within official planning. Instead, we draw from state theory within political geography and political ecology to show how ‘the state’ is an emergent effect of the processes of inclusion and exclusion, an effect constantly destabilized by Nogales's precarious physical geography and uneven urban services grid. Reconceptualizing authority and ambiguity holds quite different implications for the struggle for urban services provision.     

The Malleability of Participation: The Politics of Agricultural Research under Neoliberalism in Bolivia

This article analyses how neoliberal restructuring encouraged the use of participatory methods in agricultural research in Bolivia and how, at a later stage, participatory development initiatives had to be adapted to prevent conflicts with the post‐neoliberal views of farmer organizations. The article contributes to the debate on the normalization of participatory methods in agrarian development. Engaging with Foucault's work on governmentality and neoliberalism, our analysis goes beyond interpretations of participation which conceptualize it exclusively as a technology of power to discipline subjects. Drawing on a distinction between a liberal and a neoliberal moment in the restructuring of agricultural research, we study the case of PROINPA (Foundation for the Promotion and Research of Andean Products), a national NGO that was once part of the state system for agricultural research but was then privatized. Although PROINPA employed participation mainly to enhance managerial effectiveness, it also facilitated moments of participation from below. We argue that participation designed by this type of NGO is not just ‘technical’ as PROINPA professionals would like to perceive it, nor is it simply ‘political’ as critical views on participation hold. Instead it is malleable in the sense that each actor is involved in finding a new balance between technical, economic and political considerations.     

Canada–Mexico Relations: Interdependence,Shared Values … and the Limits of Cooperation

This article offers a historical overview of the evolution of the relationship between Canada and Mexico, emphasizing its exiguity, its fundamental economic nature and the consequences of sharing borders with the United States. It is organized as follows: the first section covers the period going from the establishment of diplomatic relations in 1944 to the late 1960s, a period during which the bilateral relation failed to consolidate despite sporadic efforts; the second section deals with the period starting with the convergence of political visions in the two capitals in the early 1970s up to the period immediately preceding the starting of the negotiations leading to NAFTA. The period during which the most significant engagement between the two countries has taken place to the present is reviewed in the third section. The article concludes presenting some thoughts on the possibilities and limits of cooperation between the two countries.     

The Archaeology of Commoner Social Memories and Legitimizing Histories

In recent years, archaeologists have productively exploited historical documents and monuments as evidence for social memory and the selective writing, rewriting, and silencing of history for instrumental purposes. However, for a variety of theoretical and methodological reasons, less consideration has been given to such powerful uses of the past in the past by commoners in domestic contexts. In this article, we present a case study that demonstrates how the household remains of commoners can be used as rich, direct sources of evidence for the conscious manipulation and deployment of social memory. Our case study focuses on multiple lines of evidence from burials interred under a household patio at the pre-Aztec and Aztec site of Xaltocan between C.E. 1290 and 1520. Archaeological burial data, osteological analyses, a fine-grained chronology created with Bayesian statistical modeling of radiocarbon dates, and ancient DNA analyses are combined to reconstruct the household genealogical history inscribed by residents. This history—perhaps motivated by power and claims to land—entailed selective remembering and forgetting and the rewriting of the past of life on this house mound and was enabled by material mnemonics in the form of buried bones. Interestingly, this inscribed, instrumental genealogical history may have been structured by some of the same principles and representational canons that shaped pre-Hispanic pictorial genealogies used as evidence in colonial legal disputes.     

Women's ecological oral histories of recycling and development in coastal Yucatán

This article addresses the formation of the Chen Kole ‘Lob women's recycling cooperative and its relationship to urbanization, plastics consumption, and the exclusionary spaces of conservation-as-development in coastal Yucatán, Mexico. Increasing amounts of plastic containers and other nonorganic garbage contaminate backyards, protected wetlands and marine areas, and individual homes located in low-lying floodable areas. However, in this region, the majority of sponsored economic development programs are directed at managing men's activities in sustainable fishing and ecotourism within natural protected areas. Both women's work and urban issues such as recycling and waste management have frequently been excluded from state policies and development practice. I draw from oral histories of women's experience in the home, in conservation space, and as participants in grassroots plastics recycling to underscore what motivated women to become involved in recycling and garbage cleanup, and how women came to be considered local professionals who maintain clean spaces. These histories underscore the links between gendered work, urban practices, and conservation-as-development, and how women's urban recycling work affects social differences and ecological decline within vulnerable coastal areas.     

Working the Yucatán in the neoliberal landscape: household management,consumption and the lives of intellectual elite women

This article examines the lives of academic women in Mérida, the state capital of the Yucatán in southern Mexico. In particular, I consider the relationship between work – including household management – and consumer practices in light of Mérida's changing socioeconomic climate. I address how women's lives have been impacted by the neoliberal restructuring of Mexico's political economy and what these changes mean to their experience of university life, household management styles and consumption practices. I point out how labor and consumption are deeply interrelated cultural practices, which have acquired new meanings in the neoliberal landscape. Accordingly, consumption practices must be understood in connection with women's social and professional identities.     

Molding maize: the shaping of a crop diversity landscape in the western highlands of Guatemala

Today's domesticated plants not only embody past human–nature interactions, but also reflect social history. Human seed exchange, replacement and loss are important forces in shaping crop diversity. This essay explores regional history in relation to the shaping of maize diversity in the western highlands of Guatemala. This is an area of exceptional maize heterogeneity and a peripheral part of the region where maize was domesticated. Maize diversity seems to have developed through geographic isolation in networks of seed exchange that were generally very local in scope. However, recent studies on Mexican maize suggest otherwise. However, few studies have examined crop diversity or seed exchange from a historical perspective. A closer examination of regional history suggests which processes might be important for shaping the present geographical distribution of maize diversity. Seeds were occasionally transported over longer distances. As a consequence, maize diversity is geographically not characterised by sharp differences between farming communities; the main differences are to be found in regional occurrences. This challenges antimodern ideas of closed, local native ecologies. Consequently, the conservation of maize genetic resources is a challenge, but not entirely contradictory with its transforming socio-economic context.     

Stratigraphy and geochronology of La Playa archaeological site,Sonora, Mexico

La Playa archaeological site in northern Sonora, Mexico contains a long record of human activity that includes the Paleoindian period (terminal Pleistocene) and much of the Holocene. The size and complexity of La Playa has discouraged a systematic characterization of its stratigraphy and geochronology, a deficiency we redress in the study. We distinguished seven stratigraphic units ranging in age from >44,570 to 400 cal yr B.P. using ¹⁴C dates from charcoal and terrestrial gastropods found mostly in archaeological features. All of the buried (in situ) cultural remains are contained in Units B (4690–1580 cal yr B.P.) and C (1010–400 cal yr B.P.) and represent overbank deposition from the nearby Rio Boquillas. Occupation at the site peaks in Units B₄ and B₅, corresponding to the Cienega phase (2800–1800 cal yr B.P.) of the Early Agricultural period. This period coincides with the growth of early agricultural villages in the region and is marked at La Playa by thousands of archaeological features including roasting pits, human burials, and extensive canal irrigation systems. The presence of semi-aquatic and aquatic snails demonstrates that water was present year round in the canal systems constructed during this period. Stable and radiometric isotopic evidence suggests that early agriculturalists diverted ground water over several kilometers from the nearby Rio Boquillas. The extensive Cienega phase occupation ended after about 1700 cal yr B.P. with deep erosion of the site, an event also visible in alluvial records in southern Arizona that marked the end of the Early Agricultural period and significant changes in settlement organization in the region.