Pre-hispanic goldwork technology. The Quimbaya Treasure,Colombia

One of the most important pre-Columbian gold assemblages made up of more than one hundred objects from two tombs in the Cauca river valley, Colombia, was studied to obtain archaeometric information. Although several attempts have been made to arrange gold production in time and space from the stylistic point of view, no firm conclusions were possible due to the lack of archaeological contexts. This paper presents first results of a new, fully instrumental approach, in which different analytical techniques, including OM, SEM-EDS, XRF, PIXE, RBS, AMS and X-ray imaging, were applied in order to determine a technological, metallurgical and chronological frame of the so-called Quimbaya Treasure.     

Judicialization and Health Policy in Colombia: The Implications for Evidence‐Informed Policymaking

The existence of the tutela mechanism and the endemic weaknesses of the legislative and executive branches of the Colombian state have led to a de facto judicialization of health policymaking. The objective of evidence‐informed policy is to identify effective policy approaches and legitimize policy decisions. Questions arise about the basis on which judges take decisions with significant policy and budgetary consequences, and the forms of evidence they use to inform these. This article focuses on the extent to which courts take account of research evidence in judgements and assesses the implications for health policy in Colombia. We place these discussions in the context of a broader analysis of the ongoing reforms to the Colombian health system and the most recent literature on evidence‐informed policymaking. The judicialization of health policymaking offers a suboptimal means to achieve the objective of evidence‐informed policymaking. The emergence of a range of evidence advisory bodies in recent years is an attempt to address the issue of judicialization alongside the other constitutional and political weaknesses Colombia faces.     

The study of collector variability in the transition to sedentary food producers in northern Colombia

Human adaptation to the tropics by populations of collectors has been a longtanding issue of debate, especially with regard to the role that collectors may have played in pathways toward sedentism and food production. In this essay, I examine significant differences in strategies developed for estuarine environments versus the inland environments of the transitional savannas of northern Colombia to analyze how these two adaptations articulate with the processes which led toward sedentism and food production in neotropical northern Colombia. Contrary to the received wisdom, I argue that the exploitation of rich estuarine environments is not necessarily a prelude to food production; seed exploitation early in the sixth millennium B.P. in the northern Colombian transitional savanna zone provides a second and arguably more probable model.     

U-Pb dating of zircon: A sourcing method for pottery from La Morena archaeological site,north-west Colombia*

U-Pb zircon radiometric dating and petrographic thin-section analysis were used for provenance identification of Ferrería and Marrón Inciso pottery styles from La Morena archaeological site in northwestern Colombia. U-Pb dating was applied to zircons recovered from pottery and rock samples from nearby geological units. The results suggest at least three distinct sources: the metamorphic rock unit on which the archaeological site is located, a granodiorite unit that outcrops further away from the site, and a mafic rock that cannot be attributed with certainty. U-Pb in zircons proved to be effective as a provenance method, where ages of the possible source rocks are well constrained, and can be applied to areas where traditional sourcing methods may be problematic.     

Kaleidoscopes of violence against indigenous women (VAIW) in Colombia: the experiences of Pan-Amazonian women

This article presents the life stories of six indigenous women from the Amazonian region, who coordinate local women processes through indigenous organizations and networks. Since the political and legal visibility of violence against indigenous women in Colombia is weak and limited, we aim to analyze their experiences from an intersectional perspective. For this purpose, we employed multiple methodologies, including body mapping and social cartography. Thus, by reconstructing their experiences and attempts to make visible violence against them, we could perceive some of its multiple modalities, which are quickly captured by the great category.     

Global flows and everyday violence in urban space: The port-city of Buenaventura,Colombia

Buenaventura, Colombia's rapidly expanding Pacific port, is simultaneously a city of violence. Focusing the linkages between local violence and the port economy, this contribution explores the role the port's global interconnections play for Buenaventura as a site of violence. In which ways does everyday violence shape urban spatial practices, particularly movement? How do every day coping strategies, reacting to a violent context, produce urban space? I suggest an analysis that links the production of urban space through everyday practices to the notion of violence as inherent to urban power relations on the one, and to the role of global flows of goods in urban space on the other hand. The main argument is that, global interconnections through the port are not decoupled from, but rather constitute a condition for violence in Buenaventura, particularly in neighbourhoods next to port terminals. This urban space is constituted both by daily violence and by stretching along global supply chains. Both violence and the secured, off-access port spaces shape, transform and limit inhabitants' mobility, while they enable global flows. I identify coping strategies such as mapping safe spaces, accompaniment, adaptation of movement to zig-zag patterns, and organised spatial strategies. The article contributes to recent debates on violence and the everyday, and urban space shaped by violent global-local encounters.     

Governmental extractivism in Colombia: Legislation,securitization and the local settings of mining control

This paper analyzes the previous decade of governmental extractivism in Colombia, designed and imposed through two main power mechanisms: legislation and securitization. In examining the government's disposition and the territorialized settings of mining control, I identify two official architectures of rights: one supporting the private accumulation of capital through the foreign exploitation of mining resources and the other aiming to concede ethnic rights. While the two architectures compete in the juridical arena, a violent dispute has developed in the overlap between the geographies of mining concessions and the geographies of ethnic communities within the territorial settings of mining control. Legal and illegal military securitization has emerged as a complementary mechanism for territorial control. By looking at the case of La Toma in the Alto Cauca region, I conclude that the country's previous two presidencies have actively promoted differentiated access to and control over land-based resources, excluding Afrodescendant communities from accessing the environmental goods in their territories while favouring private actors.     

Origins of formation waters in the Llanos foreland basin of Colombia: geochemical variation and fluid flow history

Wells located in the Colombian Andean foreland often produce biodegraded hydrocarbons and relatively fresh water (total dissolved solids concentrations of 2000 mg l^?1 dominate across most of the basin). The ratio of water to hydrocarbon in the produced fluids is high and has often been interpreted by explorationists and simulation engineers as being due to massive meteoric water invasion. To challenge this hypothesis, previously published and existing data are compiled here, along with 68 new water samples collected from both the surface (rivers) and subsurface (production wells), which are analyzed for major elements, salinity, and stable isotope compositions. The data indicate a mixed origin for the water, which involves formation water, meteoric water, and a third source that we interpret as being related to diagenetic processes (such as clay dehydration). Analyses of the variation of the parameters from north to south and west to east allow us to define the mixtures as coming from waters of different origins and make it possible to determine the relative contribution of each source.     

Evidence of Soldering Technology on Pre‐Columbian Gold Pendants from Western and North‐Western Colombia

Microscopic examination and analysis (metallography, X‐radiography, SEM–EDS, pXRF and μ‐XRF) of a group of stylistically linked gold alloy pendants from western and north‐western Colombia confirms the use of a highly unusual manufacturing technique for the region. While the Darién pendants were made using lost‐wax casting by a diverse group of cultures from southern Colombia through Costa Rica, only one subset of pendants produced in the Gran‐Zenú region (the Caribbean lowlands of northern Colombia) and the Chocó region (the Pacific area of western Colombia) in the Early Period (ad 0–900) was found to be manufactured by hammering of gold sheet and fine wires followed by hard soldering of components to produce true filigree. Similarities in features between the stylistically related cast and hammered pendants suggest that the hammered pendants may have served as a prototype for the cast versions. Other possible instances of hard soldering in the region are also presented.     

Early prehistoric sedentism and seasonal animal exploitation in the Caribbean lowlands of Colombia

San Jacinto 1 represents a special-purpose settlement that was used by late Archaic foraging groups who logistically moved from base camps to special-purpose camps in order to collect and process subsistence resources at the onset of the dry season in the Caribbean savannas of northern Colombia. Situated in an optimal location for permanent water and seasonal concentrations of dry season subsistence items, the site’s location was part of a logistic strategy in which specific task groups were moved to resources during a short season of availability. Preserved vertebrate and invertebrate faunas at San Jacinto conform to expectations about assemblage ubiquity, richness, and evenness or equitability within the early occupational strata at the site. Specific animals including turtles and fish were pursued, and may have been processed with C3 plants and grasses in ubiquitous earth ovens. Certain local aquatic invertebrates were also procured along with the collection of specific extra-local gastropods.     

Architectural space in the Muisca settlement of La Maria (Chia,Colombia) during the Prehispanic and Colonial periods

Archaeological fieldwork conducted on a plot of land near the town of Chia (Colombia, South America) uncovered the remains of a small Muisca settlement occupied from the late Prehispanic period to the colonial period. The excavation program documented particular sets of features including postholes, pits, colored floors, and a burial. These elements provided a baseline for reconstructing the ground plans of perishable structures and architectural spaces. The components of built areas were key cultural referents for the peoples who lived in La Maria during the Prehispanic period. Important changes in the arrangement of the elements that comprise architectural space are observed during the colonial period, arguably as the result of important transformations in native culture.     

The rise and fall of a speculative bubble: geostrategic concerns,public debate and the promotion of an American trans-oceanic canal in the 1820s

The article examines the interest in the United States for the construction of a trans-oceanic canal in Central America. In 1820, William Davis Robinson published a book, Memoirs of the Mexican Revolution, which contained an appendix discussing the practicability of building a trans-oceanic canal including detailed analysis of the potential routes for its construction. The appendix sparked a lively debate among American political and economic leaders. This debate would not abate until the enormity of the financial and engineering realities of the project coupled with the continuing political instability of Mexico, Greater Colombia, and the Republic of Central America dampened investor enthusiasm.     

Microstructural Characterization and Mechanical Properties of Iron Reinforcements in Buildings from the Medieval and Modern Periods in France

This article presents an overview of the metallographic structures observed on the iron reinforcements of more than 20 buildings from the medieval and modern period in France, which are representative of the evolution of ironmaking techniques at that time (330 samples). Metallographic examinations show a great diversity of structures, even in the same sample: pure ferritic iron to low pearlitic steel, presence of phosphorus in solid solution (locally up to 0.5%wt), numerous slag inclusions of various sizes, porosities.

Tensile tests were performed on a representative set of samples from 4 buildings (46 samples). The results are in accordance with the metallographic observations: mechanical behaviors are very heterogeneous, even in samples taken on the same artefact. Failure happened at values as low as the yield stress up to 25% of the plastic strain. These reinforcements probably worked in the elastic domain at low stress (<150 Mpa). These mechanical properties are significantly beyond those of modern carbon steels and question the exact role of iron in the stability of monuments.     

Evaluation of Fe isotope values as a provenance tool for chert artefacts from the north-eastern United States

Iron (Fe) isotope compositions of prehistoric stone tools and geological sources were compared to evaluate the robustness of this isotopic fingerprinting technique. Artefacts and source materials were collected from the Hatch site in central Pennsylvania, United States, where both veined chert (Bald Eagle chert) and stone tools coexist within several metres. Yellow artefacts (δ⁵⁶Fe = 0.38 ± 0.1, n = 7) and source materials (δ⁵⁶Fe = 0.42 ± 0.1, n = 8) isotopically matched within error. The source values also overlap yellow chert samples from three other Bald Eagle chert locations in the area. These values are different from six other chert locations in the north-eastern United States. These data suggest that the Fe isotope composition of chert artefacts reflect distinct geological sources. To enhance the mechanical characteristics of the stone tools, the chert experienced heat treatment, which induced a phase shift of the Fe oxide mineral goethite to hematite. This phase shift changes the colour of the chert to red. The red chert artefacts and source material also have overlapping Fe isotope values, but are 0.2‰ higher than the initial yellow chert. Experimental work where cherts were heated with different clays shows that Fe exchange with site soils induces the +0.2 fractionation. These data demonstrate that predictable Fe isotope fractionation occurs during heating, resulting in isotopically distinct artefacts.     

The deliberative deficit of prior consultation mechanisms

This article discusses the right to prior consultation guaranteed to indigenous people by international documents such as Convention 169 of the International Labour Organisation and the United Nations Declaration on the rights of Indigenous people. Using New Zealand and Colombia as case studies, the article argues that this right currently offers very little tangible benefits to indigenous people and is usually reduced to a legal bureaucratic requirement that defeats the purpose and intent of the right to consultation. I use deliberative democratic theory to show that the consultation mechanisms currently taking place in the two case studies suffer from a deliberative deficit and argue that prior consultation initiatives would better help respecting the rights of indigenous people if they were consistent with the political ideals that inform deliberative democratic theory.     

Comparative microstructural and elemental analysis of iron artefacts from Kaveri valley archaeological sites

Iron has been one of the most critical technotraditions that had lasting impact on social formation throughout the Iron Age and historical period. Iron was used in warfare and subsistence economy. Our knowledge on ancient iron smelting and working have generally been derived from ethnography and ethnohistory, which is by all means, time, region, and raw material specific. Scientific analyses of ancient iron have contributed in understanding this heritage to a respectable extent, yet a comprehensive knowledge about the evolution of iron making through time and space in India eludes us. In this work, a comparative study of iron artefacts from two Iron Age/Megalithic-Early Historic sites of Tamil Nadu, south India, that is, Mangadu (burial site) and Ambal (habitation-cum-burial site) is carried out to understand the iron thermal-processing capabilities. The retrieved artefacts were examined using X-ray fluorescence (XRF) for elemental composition. The imaging of the artefacts was done using Scanning Electron Microscopy (SEM), Electron Backscatter Diffraction (EBSD), and Optical Microscopy (OM). In addition, phase identification was performed using X-ray diffraction (XRD) and Energy Dispersive X-ray Spectroscopy (EDS). Combination of these analyses illustrates that inhabitants of Mangadu and Ambal were aware of the iron alloy manufacturing/processing techniques such as forging and hammering.     

The second issuance of a Tuscan gold coin: the gold groat of Lucca, 1256

In 1252 Genoa and Florence embarked upon the issuance of gold coins. Although Genoa's effort ultimately failed due to an internal economic crisis, the Florentine florin dominated the international money markets of western Europe and beyond for the next two and a half centuries. Lucca, Florence's Tuscan neighbor, likewise ventured into the issuance of a gold coin at least by 1256. However, Lucca's gold issue was apparently of a modest scale and never mounted a challenge to the florin. This article establishes the date ante quern at which Lucca made her return to gold and attempts to explain why the Lucchese gold groat did not become a significant factor in Europe's earliest experiment with bimetallism.     

The analysis of copper artifacts of the copper inuit

Metallography and neutron activation analysis have been used to investigate copper artifacts from 19th century archaeological sites associated with the “Copper Inuit” of the west-central Canadian Arctic. A knowledge of the source of the copper from which the artifacts were manufactured - native (local) copper or European (exotic) copper - is important, for example, to studies of the effects of European contact on utilization of native copper and on the general lifestyle of the Copper Inuit. Trace element analysis by neutron activation using the SLOWPOKE reactor has allowed local native copper, from the Coppermine River and Victoria Island, NW Territories, to be clearly distinguished from 19th century European smelted copper, which was found to contain higher concentrations of arsenic, antimony, nickel and selenium. Moreover, optical and scanning electron metallography revealed significant microstructural differences between native copper and the 19th century smelted copper. As a consequence it was possible to differentiate between native copper archaeological artifacts and those produced from smelted copper.     

The technology of Stone Age colonization: an empirical,regional-scale examination of Clovis unifacial stone tool reduction,allometry, and edge angle from the North American Lower Great Lakes region

There is now broad consensus that the appearance of Clovis in Northeastern North America (Great Lakes, New England) represents a colonization pulse into recently deglaciated landscapes. Due to the increased resource uncertainty that comes with colonizing unfamiliar landscapes, it was hypothesized that the majority tool component of Clovis assemblages, unifacial stone tools, should have been knapped on tool blanks possessing the design properties of longevity and functional flexibility to facilitate exploration mobility and guard against the absence of toolstone sources in the new landscape. These properties are optimized by large, flat flakes, possessing large surface area relative to flake thickness. Since discarded and, at times, exhausted unifacial stone tools do not preserve the original dimensions of the blank upon which they were created – necessary items for a true test of blank morphology selection – this study presents a set of predictions for inferring whether Clovis unifacial stone tool blanks were selected for the properties of longevity and functional flexibility based on evidence that Clovis people actually capitalized on those properties. Due to the nature of Clovis unifacial stone tools, tool size was of necessity used as a proxy for tool reduction, on the grounds that smaller tools are more likely to have been resharpened than larger tools, at least in the case of unifacial flake tools. The results showed that less resharpened tools possessed flatter, less spherical shapes than the more resharpened tools, which possessed more globular, spherical shapes, suggesting Clovis foragers exploited the retouch potential afforded by the larger, flatter blanks. Edge angles showed no relationship with tool reduction, suggesting that Clovis foragers exploited the functional flexibility afforded by flatter blanks by adjusting the edge angle to be either higher or lower as needed. These results are consistent with the notion that human colonizers, who did not know the abundance or location of stone outcrops prior to settling an unfamiliar territory, not only “geared up” before leaving a stone source, but geared up as efficiently as possible by carefully selecting the blanks they chose to carry. Broader implications for such careful unifacial stone tool blank selection are discussed.