Forensic Ar/Ar dating: a provenance study of Middle Stone Age obsidian artifacts from Ethiopia

Obsidian sourcing based on geochemistry is widely applied to reconstruct commerce patterns and dissemination of early hominid groups. Due to problems concerning potential intra-source variability or homogeneity of a geological source over large areas, parameters additional to this classical approach are desirable. Here we present the first ⁴⁰Ar/³⁹Ar investigation of Middle Stone Age (MSA) obsidian artifacts (i.e. debitage pieces) for this purpose, as well as of potential geological obsidian sources from Ethiopia. With the present pilot study we demonstrate that ⁴⁰Ar/³⁹Ar geochronology represents a reliable and powerful tool for archaeological provenance studies complementary to the geochemical approach and more recently applied techniques like fission track counting or Mössbauer spectroscopy. Two independent sets of debitage and potential source rock samples were dated by the ⁴⁰Ar/³⁹Ar method. Debitage pieces from the Kulkuletti excavation site and obsidian samples from the nearby obsidian outcrop Worja (central Ethiopia) exhibit basically identical age ranges as well as similar Ca/K and Cl/K ratios, supporting the debitage/source rock relationship previously inferred on geochemical grounds. A second small set of geochemically characterized debitage samples from the Porc Epic cave and potential source rocks from an obsidian outcrop at Kone (Eastern Ethiopia) however have different ⁴⁰Ar/³⁹Ar ages and Ca/K and Cl/K ratios. These results contradict the previous conclusion about a debitage/source rock relationship of the Porc Epic and Kone samples made on the basis of geochemistry [A. Negash, M.S. Shackley, Archaeometry 48 (2006) 1]. Additional sampling at the Kone outcrop as well as of other obsidian occurrences in the greater area is needed to unambiguously pinpoint the origin of these obsidian tools.     

Tracing firing technology through clay properties in Cuzco,Peru

The purpose of this study was to identify changes in firing practices that occurred during a timeframe that saw the introduction of European kiln technology to the Andes (AD 900–1800). Pottery from an excavated context at the archaeological site of Aqnapampa in the southern highlands of Peru was examined for changes in paste recipes that adapted local materials to increased firing temperatures indicative of evolving firing technologies. Sherds (60) and fragments refired to 890 °C from 12 stratigraphic levels were compared by style, surface treatment, paste color, and vitrification structures (ESEM). Four technological phases of the Cuzco pottery sequence emerged and were used to evaluate the trajectory of a single decorative style (Killke). Previously thought to have been produced in pre-Inca times and curated into later periods, the Killke sherds presented evidence that the style was produced using technologies introduced in the Inca and Spanish Colonial Period.     

Defying Delhi’s enclosures: strategies for managing a difficult city

Reflecting wider debates on the city as a site of coercion and opportunity, Delhi is marked by the coordinates of both cultural nationalism and neo-liberal aspiration. The former positions the city as a site of cultural pollution, at times claiming ‘western lifestyles’ have contributed to gendered assault. In juxtaposition, Delhi’s neo-liberal landscape positions the female body as a valued commodity, iconic of ‘globalised living’, embedded in discourses of autonomy and modernity. This article will argue that these entangled cultural constructs have created a city of threat and discomfort that problematizes women’s access, be it for livelihood or leisure, enclosing women within coordinates not of their making. Yet rather than acquiesce to this urban topology, the agency of the single, middle-aged, middle-class women in this ethnographic study extends our understanding of the agonistic relationships within urban space, and the capacity to negotiate them using practices of avoidance, deception, adaptation, defiance, and care, at times creating their own enclosures in the process that enabled access to the city. Age and class as well as gendered expectations impacted on the available resources and outcomes of these negotiations, revealing the diverse possibilities of urban living that can enable pockets of social and political flourishing even within a difficult city.     

Urban political ecology in late prehistory: New evidence from El Purgatorio,Peru

One of archaeology's greatest strengths is its reliance on interdisciplinary collaboration and the utilization of multiple lines of evidence to inform archaeological interpretation. For example, through an examination of faunal and floral remains, production and storage facilities, and the isotopic analysis of human skeletal remains one can develop a model for urban political ecology in ancient cultures. In this case study, the political ecology of the Casma capital city, El Purgatorio, Peru, is investigated in order to inform our interpretations and conclusions regarding Casma political, economic and social organization. The results indicate that Casma political ecology was firmly based in coastal resources and oriented towards supporting state-sponsored feasting and ritual activities, suggestive of a largely elite-controlled redistributive economy. In contrast to previous models characterizing this time period as one of factionalism and environmental stress, the data suggest that coastal cultural adaptations produced an era of widespread political and economic stability.     

Organisational responses to climate change: do collaborative forums make a difference?

Innovative and effective responses to climate change require that we move beyond reliance on government to include organisations spanning different sectors, such as not‐for‐profit, private, and community groups. Interactions among these organisations in collaborative networks—or “forums”—may provide important mechanisms to successfully address climate change impacts. This paper investigates the relationships between organisational participation and involvement in forums and responses to climate change. Survey data show that people from many organisations are participating in forums and using these meeting points to discuss climate change, even when forums are intended to serve other purposes. The data suggest that participation in any type of forum is related to organisational responses to climate change. Attributes such as type of organisation and knowledge of climate change issues were also found to be related to organisational responses to climate change but these became less important when climate change was discussed in forums. The results of the research suggest that a practical way to increase the volume and variety of organisational responses to climate change may be to encourage participation in forums and/or to influence existing networks to incorporate more discussions of climate change issues.     

Gender perspective on the social networks of household heads and community leaders after involuntary resettlement

The study of social network analysis in Indonesia and the Philippines reveals that after a certain period in a new community and living among involuntarily resettled strangers, household heads and community leaders will eventually replace their disrupted previous networks with new network ties. The paper likewise demonstrates how gender moulds social network features at the levels of the Indonesian household heads and Philippine community organization after involuntary resettlement. Existing gendered context in two settings like the Indonesian woman’s role as primary caretaker of the household and the absence of a consolidated patriarchal system in the Philippines is shown to have reinforced gender (dis)advantages. As reflected in the two settings, those who have the biggest networks are also the brokers or the influential actors who can control and have an advantage in accessing social capital. Further, basing on the two cases, we identify the gender norm of the centrality of women’s role as homemaker and caregiver in addition to other roles as a similar explanation for the bigger proportions of friends in the networks of women as compared to men. Unless outside interventions reconfigure the natural trajectory of the social networks, gender equality in terms of leadership, decision-making and access to suitable programs and projects as well as to the relevant authorities, remains problematic.