Defensibility of large prehistoric sites in the Mid-Fraser region on the Canadian Plateau

Based on Geographic Information Systems (GIS) analysis, this paper assesses the defensibility of winter village sites in the Mid-Fraser region on the Canadian Plateau during the Late Prehistoric Period (ca. 3500–200 B.P.), particularly the Plateau and Kamloops Horizons (ca. 2400–200 B.P.). Although there is variability in prehistoric village locations in terms of defensibility, highly defensible prehistoric sites in the Mid-Fraser region are concentrated in two localities. The high defensive values of these village sites indicate that the threat of intergroup conflict had a significant impact on choice of settlement location. The approach used in this paper demonstrates the importance of past defensive considerations in the decision making processes pertaining to settlement locations. As conflict is a common feature of many cultures and time periods throughout the world, this approach has potential applications to other defensive sites globally.     

Tiwanaku trade patterns in southern Peru

This paper provides data and analysis from an intensive settlement survey in the southwestern Titicaca Basin. This research was designed to assess the nature of Tiwanaku (AD 600–1100) long-distance trade. The survey area was placed between the prehistoric urban capital of Tiwanaku and its primary colony in Moquegua, a valley located on the Pacific watershed approximately 325 km away. The survey was specifically placed in an area where GIS analysis indicated a least-cost transit route between Tiwanaku and Moquegua. Field adjustments to the survey area were made based upon informant data about the historic location of caravan routes. The results of the survey indicate that there is a light but virtually continuous string of Tiwanaku occupation along the trails and roads in the area sampled between Tiwanaku and Moquegua. However, in contrast to the later Inca (AD 1450–1532) period pattern, Tiwanaku did not maintain way stations or build any kind of formal road system. The data indicate that Tiwanaku had indeed relied upon camelid caravans utilizing the least-cost pathways, but it did so in a more decentralized and informal way than the later Inca state.     

THE EFFECT OF THE FREE TRADE AGREEMENT ON CANADA'S ENERGY RESOURCES

The inclusion of energy in the Free Trade Agreement (fta) illustrates perhaps better than any other provision in the agreement that the basic objective of this treaty was not the elimination of tariffs between Canada and the U.S.A. but the creation of a new economic order for Canada, which would limit the power of the nation-state to intervene in the economy. By the time the FTA came into effect at the beginning of 1989, Canada and the U.S.A. had already established virtually a free-trade relationship in energy commodities. The previously existing National Energy Program had been dismantled by the federal Conservative government by June of 1985 and this was followed by a process of thoroughgoing deregulation in all spheres of energy under federal jurisdiction. With the coming into force of the FTA, the newly deregulated Canadian energy economy became an irrevocable and permanent feature of Canada's energy relations with the United States.     

Community, Identity and Gender in Migrant Societies of Southern Africa: Emerging Epistemological Challenges

Immigration policy in South Africa is undergoing serious revision in response to unprecedented cross-border migration into the post-apartheid state. This article looks at the relevance of orthodox international relations theory to migration policy in South Africa, and argues that fundamental shifts in approach are essential if IR theorists of the region are to contribute effectively to understanding and managing migration in southern Africa. It builds on the results of interviews with migrants and considers the significance of the themes of identity, community and gender as areas of particular relevance to international relations theory.     

The geographic origins of Nasca trophy heads using strontium,oxygen, and carbon isotope data

Scholars continue to debate the identity of individuals curated as trophy heads in the Nazca Drainage of southern Peru (c. 1–800 AD). What was the role of trophy heads in Nasca society? Were they victims of warfare or venerated ancestors? Strontium, oxygen, and carbon isotope data from archaeological human tooth enamel from Nasca trophy heads from Aja, Cahuachi, Cantayo, Majoro Chico and Paredones, and from individuals buried in Nasca cemeteries at Cahuachi, Cantayo, and Majoro Chico elucidate the geographic origins and paleodiet of trophy heads in the Nazca Drainage. The ⁸⁷Sr/⁸⁶Sr and δ¹⁸O_c(V-PDB) data from both the trophy heads and the Nazca Drainage burials are all quite variable, and do not support the hypothesis that the Nasca trophy heads were obtained from a geographically-distinct population. Similarly, the δ¹³C_c(V-PDB) data demonstrates that the individuals included in this study consumed similar diets. These data suggest that the Nasca trophy heads likely derive from the local Nasca population. Rather than obtain heads from enemy warriors through geographic expansion or warfare as seen in other parts of the world, this complex social practice existed within the Nasca polity throughout space and time.     

The history of the United States cent revealed through copper isotope fractionation

Copper isotope fractionation in United States cents traces changes in the source of copper and identifies historical events. Application of copper isotopes as a geochemical tracer requires consistent isotopic signatures of the ores and refined metals. Overlapping isotopic signatures of crushed ores, chalcocite and refined metal extracted from Morenci, Arizona indicate modern mining processes that produce distinguishable single ore deposit geochemical signatures. The coincidence of copper isotope ratios in metals and ore deposits also exists within the United States cents analyzed here. Specifically, historical records confirm two different sources for copper in cents from 1800 through 1867. The copper isotope composition of the 1828, 1830, 1836, 1838 and 1843 cents coincides with the Cornwall ores of England, and cents post 1850 (1859, 1862) correspond with the Michigan ores of the United States. Three of the thirty-six post 1867 cents measured possess fractionated copper isotope ratios and indicate the change in source of copper for the United States cent.     

Osteological applications of high-resolution computed tomography: a prehistoric arrow injury

In comparison to conventional computed tomography (CT) and radiography, high-resolution CT is a superior means of visualizing and quantifying fine structures in a wide range of materials. Here the shape and size of a chert arrowhead lodged in a 700-year-old tibia from Norris Farms #36, Illinois, are identified, as are the bony response and the arrow's probable trajectory through the bone. The use of high-resolution CT – in this instance, to identify structures down to the level of individual trabeculae – can be used in other archaeological applications when fine details are important and specimens cannot be damaged by invasive (i.e., destructive) procedures.