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.     

Prosperity,power, and change: Modeling maize at Postclassic Xaltocan,Mexico

Documenting the relationship between agriculture and political economy occupies the center of much research and debate in anthropological archaeology. This study examines this issue by focusing on maize at Xaltocan, a Postclassic community located in the northern Basin of Mexico. We consider how different mechanisms of distribution, circulation, and production can influence maize variation. We analyze maize variability through time at Xaltocan and the community’s chinampa system and interpret patterns of variation in relation to its historical trajectory. This methodological and interpretive approach offers an innovative means to understand how agricultural practices transformed in relation to changing conditions of prosperity and power, especially the links between tribute, market exchange, conflict, and regional demography. Our study also speaks to broader, dichotomous perspectives that model the organization of agricultural systems, revealing that the strategies of both agriculturalists and the state often converge at local levels.     

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 technological practices: neutron activation analysis of neolithic ceramics from Valencia,Spain

Using instrumental neutron activation analysis (INAA) of prehistoric pottery, daub, and modern clay samples from Valencia, Spain, we tested expectations on changes in raw material use with socio-economic shifts during the Neolithic (ca. 5600–2800 BC). Elemental analysis identified three distinctive clay source groups used by Neolithic potters. Contrary to expectations, a shift in raw material use was identified between the Early and Middle Neolithic despite general similarities in technological practices. In the Late Neolithic, pottery production became more specialized, but potters used the same range of clay sources documented earlier. This study illustrates the utility of INAA for testing hypotheses of prehistoric craft production.     

The 'Mardi Gras' Shipwreck: Results of a Deep-Water Excavation, Gulf of Mexico, USA

The 'Mardi Gras' Shipwreck is the remains of an early-19th-century sailing vessel lost in approximately 1220 m of water in the Gulf of Mexico. A recent archaeological investigation documented the wreck and recovered several artefacts, including glassware, ceramics, navigational instruments, a cannon, and a stove. Analyses of these artefacts and the surviving hull have led to preliminary conclusions on the nature of the vessel and its crew.
© 2009 The Authors     

Sentinel Butte: neutron activation analysis of White River Group chert from a primary source and artifacts from a Clovis cache in North Dakota,USA

Instrumental neutron activation analysis (INAA) was used to characterize the chemical composition of chert from a primary source in western North Dakota. Known as Sentinel Butte, this source is part of the Eocene-age White River Group (WRG), a widespread geological formation on the central and northern Plains. INAA results demonstrate that it is chemically distinct from other known chert-bearing WRG. Further, analysis of three bifaces from the nearby Beach Clovis cache site demonstrates that they are made of chert from Sentinel Butte, and most likely the other 55 White River Group Silicate (WRGS) bifaces in the cache are as well. Although Clovis caches typically are dominated by materials transported hundreds of kilometers, it is argued that the advance manufacture and caching of bifaces even a short distance from a source may be a highly effective tactic to reduce gearing up time and hence search costs associated with the pursuit of mobile game at the close of the Pleistocene.     

The Archaeology of Trading Systems,Part 1: Towards a New Trade Synthesis

After almost three centuries of investigations into the question of what it means to be human and the historical processes of becoming human, archaeologists have amassed a huge volume of data on prehistoric human interactions. One of the largest data sets available is on the global distribution and exchange of materials and commodities. What still remains insufficiently understood is the precise nature of these interactions and their role in shaping the diverse cultures that make up the human family as we know it. A plethora of theoretical models combined with a multitude of methodological approaches exist to explain one important aspect of human interaction—trade—and its role and place in shaping humanity. We argue that trade parallels political, religious, and social processes as one of the most significant factors to have affected our evolution. Here we review published literature on archaeological approaches to trade, including the primitivist-modernist and substantivist-formalist-Marxist debates. We also discuss economic, historical, and ethnographic research that directly addresses the role of traders and trade in both past and contemporary societies. In keeping with the complexities of interaction between trade and other aspects of human behavior, we suggest moving away from the either/or perspective or strong identification with any particular paradigm and suggest a return to the middle through a combinational approach to the study of trade in past societies.     

Re-placing plainware: Production and distribution of domestic pottery,and the narration of the pre-colonial past in the Peruvian Andes

The location of domestic pottery production is central to archaeological narratives. Yet too often, unfounded assumptions are made about place of production, especially in relation to place(s) of distribution and use. Only rarely is this geography of production and distribution explored in detail and with perspective. Here, we investigate this problem in the context of the Peruvian Andes. We present the results of extensive ethnoarchaeological research on the manufacture of domestic vessels in over thirty villages with potters in Northern Peru. Drawing on the ethnographic concept of technical style, we identify three tendencies on the relationships between toolkits, manufacturing techniques, geographic units, and exchange. From these tendencies we develop two models of domestic pottery production and distribution: the local production model and the non-local production model, which are applied in analysis of archaeological materials. While this distinction is apparently simple, we demonstrate how the explicit or implicit use of each of these models has shaped some of the most important debates and issues in Andean archaeology. In sum, we explain how understandings of the manufacture, exchange, and use of plainware impacts narratives about the pre-colonial past.     

The good, the bad and the confusing: the political economy of social care expansion in South Korea

Recent social policy reforms in South Korea indicate a progressive shift by a conservative government to modify the familialistic male breadwinner model that informs its welfare regime. The Korean government has demonstrated support for women through an increase in the provision, regulation and coordination of childcare and workplace support programmes for working parents. At the same time, labour market reforms have also created more pressures on women to seek and maintain paid work outside the home. Conflicting social and economic policy objectives have resulted in a confusing mix of policies, advancing and impeding gender equality at the same time. This contribution examines the recent family–work reconciliation policy reforms in Korea and discusses why these reforms may be good politics but a bad deal for women.     

Governing relations between people and things: Citizenship, territory, and the political economy of petroleum in Ecuador

Ecuador is the fifth largest producer of petroleum in Latin America. Petroleum has brought prosperity to many Ecuadorians, effectively becoming the nation's most important natural resource. It also has inspired intense political mobilizations. While the best known of these are led by Amazonian indigenous peoples, petroleum has also generated other important but not as well-recognized mobilizations. This paper focuses on the political mobilization of Amazonian agricultural settlers and petroleum workers in relation to petroleum. While these actors do not share common livelihood or cultural struggles, the discourses that frame their mobilizations in relation to petroleum have common elements. Their dissatisfaction with the political economy of petroleum in the 1990s and 2000s, for example, generated high profile protests and civil unrest that centered not on stopping production, but on demanding a more ‘responsible management’ of petroleum by the state. The paper brings together political economy, mechanisms of subject formation, and the material qualities of petroleum to explore how petroleum production in Ecuador has shaped common views on citizenship among these actors that center on petroleum as a site of regulation of social life.     

The Ixtacamaxtitlán kaolinite deposit and sinter (Puebla State, Mexico): a magmatic-hydrothermal system telescoped by a shallow paleoaquifer

The Ixtacamaxtitlán hydrothermal deposit is made up of a succession, from bottom to top, of: (1) a porphyritic subvolcanic body, crosscut by quartz veins, and a stockwork with subordinate sulfides (pyrite and chalcopyrite), showing propylitic alteration haloes overprinting a previous potassic alteration event (biotitization); (2) an overlying, kaolinized lithic‐rich rhyolitic tuff; and (3) a layered opal deposit with preserved sedimentary structures. This vertical zonation, coupled with the distribution of the alteration assemblages, lead us to the interpretation of the whole as a porphyry‐type deposit grading upwards to a barren, steam‐heated, acid‐leached, kaolinite blanket with a partially preserved silica sinter on top. Both the fluid inclusion study carried out on the veins and stockwork, and the stable isotopic analyses of the kaolinized bodies, suggest the presence of two major hydrothermal events. The older event is characterized by the occurrence of hot hypersaline fluids (up to 320°C and 36 wt% NaCl equivalents), likely of magmatic origin, closely associated with the emplacement of the underlying early Miocene porphyry‐type deposit. The later event is characterized by the presence of cooler and dilute fluids (up to 140°C and 4 wt% NaCl equivalents) and by advanced argillic alteration close to the paleosurface. The calculated isotopic composition of water in equilibrium with the kaolinitic sequence plots close to and underneath the meteoric water line, partially overlapping the Los Humeros present‐day geothermal fluids. This evidence coupled with the petrographic observations suggests that steam‐heated phreatic waters altered the lithic‐rich rhyolitic tuff. This would have occurred when acid vapors, exsolved from deeper hydrothermal fluids by boiling, reached the local paleowater table and condensed, after a sector collapse that changed the system from lithostatic to hydrostatic conditions.     

Politicians,Merchants, and Colonial Maritime War: The Political and Economic Background of the American Act of 1708

During the War of the Spanish Succession (1702–13), there were attempts to support colonial maritime war by legislation, and the American Act of 1708 can be seen as their culmination. Historians who study privateering or colonial history have referred to this act in several contexts, such as reform in prize administration, naval impressment in American colonies, and Spanish‐American trade. However, the political and economic interests behind this act have not been fully investigated. By examining the process of the enactment of the American Act together with antecedent attempts to promote colonial maritime war in parliament, this article reveals the political and vested interests involved in the act, the relations between them, and the influence they had on the content of the act. This analysis will show the complex interaction between politics, trade, and colonial maritime war in the early‐18th‐century American colonies.     

The political geography of war's end: Territorialisation,circulation, and moral anxiety in Trincomalee,Sri Lanka

This article argues that territorialisation and circulation are centrally important to the transition that takes place at the end of a war. It does so with a case study of Trincomalee, a multiethnic region on Sri Lanka's east coast, after the end of the ethno-separatist war in 2009. Post-war territorialisation comprises the consolidation of the government's military victory through the establishment of military zones and sacred sites, the construction of strategic roads and shifts in the ethnic settlement patterns. There are, however, a number of contingent counter-forces that unsettle the common interpretation that this is orchestrated 'Sinhala colonisation'. The angle of circulation directs us to flows and influences that become manifest when the curtailment of war (checkpoints, frontlines, collapsed infrastructure, surveillance) comes to an end. This propels a peace dividend - access, security, mobility - but also incites concerns among all ethnic communities about exposure to the moral decay of a globalised world. While territorialisation and circulation may appear to be opposites, they are in fact a conceptual pair. The two terms expose a field of tension that has much to contribute to the geographical literature on war endings, which has neglected the significance of postwar shifts in circulation thus far.     

‘The first duties of persons living in a civilized community’: the Maya, the Church, and the colonial state in southern Belize

In recent years, historical geography has been at the forefront of new scholarship on the spatiality of colonial power and its complex relations with indigenous communities. This literature shows that imperial policies – emerging through state and scientific institutions, cultural practices, and capitalist ventures – required particular ways of conceptualizing, mapping, and organizing spaces and territories which transformed the geographies of indigenous communities, livelihoods, and identities. Through a close reading of archival texts from the late 19th and early 20th century, this paper examines the spatial and political relations between three groups: the Catholic Church, the British colonial state, and the Maya communities of southern British Honduras. Differences between the Catholic Church and the British colonial state – in their aims and approach to winning hegemony over the Q'eqchi' and Mopan Maya – were accommodated and assuaged by a tacit agreement: that the Maya must be settled in permanent communities. Colonial power, in both its spiritual and statist modalities, was imminently geographical, and this geography comprised the common ground between Church and state in their approach to the Maya.     

The use of SEM-EDS,PIXE and EDXRF for obsidian provenance studies in the Near East: a case study from Neolithic Çatalhöyük (central Anatolia)

In this paper we evaluate the relative analytical capabilities of SEM-EDS, PIXE and EDXRF for characterizing archaeologically significant Anatolian obsidians on the basis of their elemental compositions. The study involves 54 geological samples from various sources, together with an archaeological case study involving 100 artifacts from Neolithic Çatalhöyük (central Anatolia). With each technique the artifacts formed two compositional groups that correlated with the East Göllü Da? and Nenezi Da? sources. The non-destructive capabilities of these methods are emphasized (albeit with certain analytical limitations in the case of SEM-EDS), suggesting important new techniques for Near Eastern obsidian provenance studies.