Late Silurian and Early Devonian biostratigraphy in the Hill End Trough and the Limekilns area,New South Wales

Precordilleran Late Palaeozoic brachiopod genera considered for this palaeobiogeographical analysis belong to four faunal associations: the low diversity Early Carboniferous (Tournaisian) Protocanites scalabrinii-Azurduya chavelensis Zone; the Late Carboniferous (Bashkirian-Moscovian) Levipustula fauna, which appears in sequences associated with glacial intervals; the latest Carboniferous-earliest Permian (Gzhelian-Asselian) Rhipidomella-Micraphelia and Tuberculatella-Aseptella associations, and the Early Permian (mid to late Asselian) Tivertonia jachalensis-Streptorhynchus inaequiornatus Biozone. The brachiopod affinities of the Precordillera are compared with the biogeographical Late Palaeozoic regions previously suggested by other authors using cluster analysis. During the Bashkirian-Moscovian, the Precordilleran faunas show a high affinity with the Austral Realm because of the presence of the Levipustula faunal elements in Eastern Australia. At the same time the affinity with the central and North American Regions is very low. The Early Permian Precordilleran faunas demonstrate highest affinity with the Gondwanan Realm with several genera also linked to the Tethyan and Boreal Realms. After the Late Carboniferous glacial episodes that affected the southwestern Gondwanan margin, the Precordilleran region underwent climatic amelioration. Subsequently, the Early Permian Precordilleran brachiopod assemblages are characterized by typical cool to cold water genera widely developed in the core Gondwanan Realm, with fewer genera (such as Kochiproductus, Rhynchopora and Neochonetes) suggesting a warmer water influence. The Precordilleran faunas demonstrate an increase in brachiopod diversity from the Carboniferous to the Permian, related to water temperature changes and to the palaeogeographical evolution of the southwestern Gondwanan margin and the movement of Gondwana across the South Pole.     

Scattering problems of the SH Wave by Using the Null-Field Boundary Integral Equation Method

The scattering problem of seismic waves is an important issue for studying earthquake engineering. In this paper, the null-field boundary integral equation approach was used in conjunction with degenerate kernels and eigenfunction expansion to solve the SH-wave scattering problem of a circular or an elliptical-arc hill. The original problem is divided into subdomains by taking a free-body diagram. One region is an interior boundary value problem. The other is a canyon scattering problem. For the boundary value problem, not only a simply connected domain (elliptical-arc hill problem) but also a doubly connected domain (a circular-arc hill problem containing a circular tunnel or a circular inclusion) is considered. The canyon scattering problem may be addressed in an infinite domain with an artificial boundary of a full plane such that the degenerate kernel can be fully utilized. The null-field integral equation method is used to match boundary conditions. Numerical results are compared favorably with the available data.     

The Imperial Visual Archive: Images,Evidence, and Knowledge in the Early Modern Hispanic World

This article examines the role of images as evidence and sources of knowledge in the early modern Hispanic world, arguing for the continued importance of visual epistemology as a technique for producing and circulating knowledge from the sixteenth through the eighteenth centuries. Visual materials played a central role in the production of knowledge, scientific and imperial, and served as key instruments for addressing the considerable challenges of distance and place posed by the geographical expanse of the empire. Historiographically, the article highlights the active generation of scientific knowledge in the Hispanic world and connects it to imperial and administrative practices; it highlights trans-regional channels of circulation, demonstrating the connected histories of the viceroyalties and peninsula and the multidirectional trajectories in which information and knowledge moved; and it points out deep connections between earlier and later colonial periods. Methodologically, the essay explores the potential of images as historical sources, suggesting that the high status of images in the early modern Hispanic world led to the creation of an enormous pictorial archive that deserves the same level of scholarly attention and rigor that has been lavished on the textual archive.     

Site maintenance practices and settlement social organization in Iron Age Karnataka, India: Inferring settlement places and landscape from surface distributions of ceramic assemblage attributes

This paper investigates the spatial organization of social relations in settlement contexts through a quantitative and distributional analysis of surface ceramic attributes from Iron Age Period (1200–300 BC) archaeological sites in Southern India. The results discern variation in depositional contexts across each site, from which I infer a variety of basic settlement activity structures (e.g., site maintenance, trash disposal, residence, animal husbandry, metallurgy, ritual). I use these results, together with further analyses of artifact and feature distributions, to infer a basic suite of places, place-making practices and some of the social relations and organizational structures that produced these historically unique Iron Age settlement landscapes.     

Chiefdoms and states in the Yuncheng Basin and the Chifeng region: A comparative analysis of settlement systems in North China

Regional settlement datasets for the Yuncheng Basin and the Chifeng region are re-analyzed for comparison so as to reconstruct differing patterns of community development at local and supra-local scales. A methodological implication of this reanalysis is that comparing settlement areas and surface artifact densities between projects requires special attention to how the data were recorded so as to put them on the same measurement scale. The analytical approaches originally taken to reconstructing community organization in the two regions, while differing in several respects, are shown to produce highly compatible results, permitting a comparison of the two trajectories with a sound empirical foundation. Neolithic settlement began much earlier in Chifeng, but rates of demographic and community growth were extremely slow. In Yuncheng, early village growth was much more dramatic. Multiple chiefly districts of modest size emerged in both regions, but those of Yuncheng, despite their shorter developmental trajectory, had substantially larger populations. Their central settlements, in particular, grew to be much larger than those in Chifeng and the special activities carried out at these centers differed between the two regions. A poorly understood, but not contemporaneous, demographic disruption punctuated both sequences. It was followed by the emergence of political integration on a much larger scale in the Yuncheng Basin, focused on a single settlement an order of magnitude larger than its predecessors. In Chifeng, regional population soared far beyond previous levels, but political integration remained persistently small in scale.     

The use of predictive modelling to target Neolithic settlement and occupation activity in mainland Scotland

A central aim of Neolithic studies in Europe is to understand settlement or domestic activity of the first agriculturalists. In Scotland, the continued absence of unambiguous Neolithic settlement or domestic occupation activities on the mainland remains an unresolved issue. It is proposed that areas attractive for settlement and occupation activities may be identified by constructing GIS-based models of sites believed to be related to settlement or occupation activities, including chambered cairns, timber halls, and sites containing pit-digging episodes. Statistical analyses undertaken in this process suggest new insights into the locations of the chambered cairns, timber halls, and pits. Finalised models are constructed and desktop assessments are conducted to examine model performance. Research priorities for improving significant environmental variables driving the current models are identified.     

Characterization of New Zealand obsidian using PXRF

New Zealand has some of the most active areas of rhyolitic volcanism in the world and this has produced numerous obsidian sources in the northern half of the North Island. In total archaeologists have recognized 27 named locations from which obsidian can be obtained scattered across 4 geological source regions. Shortly after colonization in the late 13th century AD Polynesian settlers began transporting this material some thousands of kilometers throughout the country and across the sea in small quantities to distant neighbors in the Kermadecs and Chatham islands. Although considerable research has been conducted on obsidian sourcing in New Zealand the complexity of geochemical source discrimination and the lack of a practical method of non-destructive geochemical analysis has hindered progress. We present the results of our use of PXRF to provide geochemical data on New Zealand obsidian sources and to compare the use of discriminant analysis and classification tree analysis to discriminate among sources and attribute archaeological samples to sources. Our research suggests that classification tree analysis is superior to discriminant analysis in sourcing studies. A large case study using an important settlement phase site (S11/20) from the Auckland region demonstrates the utility of the methods and the results support a model of high degrees of mobility and interaction during the early settlement of New Zealand.     

Sailing virtual canoes across Oceania: revisiting island accessibility

Understanding sailing conditions is a basic requirement for understanding the two periods of settlement of the distant islands of Oceania, initially from the Bismarck Islands off New Guinea as far as Samoa and later from Samoa throughout East Polynesia. The question of a “navigational threshold” between these two worlds is the focus of this paper. A computer simulation is presented that quantifies the difficulty of sailing virtual canoes in the differing wind conditions in both areas. The model demonstrates substantial differences in ease of voyaging up to and beyond Samoa. That this measure is so markedly different between these two worlds gives support for the hypothesised pause between the discovery and settlement of islands West and East of Samoa.     

Centripetal settlement and segmentary social formation of the Banpo tradition

Creating a spatial environment to facilitate social operation is a common practice among human groups. Segmentary social formations have limited regulatory capacity due to the lack of formally sanctified authorities. The pressure is on the emergency of atternative mechanisms that regulate the practice of segmentary principles. The Neolithic site at Jiangzhai in North China is a classic archaeological example of using the centripetal plan and demarcated space to support the working of segmentary organization. The occupation was partitioned into three concentric divisions of the central plaza, residential and burial zones. The later two zones were further demarcated into spatially discrete areas for allocating the social segments comprising the community. The arrangement translated the abstract segmentary principles into tangible space where everyday practices played out. It created a spatiality that placed individual acts under the watch of the entire community, thus enabling the effective policing against deviated practices by public opinions. Analyses of the material remains distributed in the highly ordered built environment indicate that food sharing was practiced in the communal level, and craft production of the ceramics was likely organized in the household level. Patterns of monochrome paintings and etched signs on the ceramics suggest the sharing of symbolism in a pan-community network. The study also isolates the budding of non-conforming acts that would one day fracture the segmentary community.