This dissertation seeks to establish the possible provenance of copper and copper alloys used at Great Zimbabwe (1000-1700CE) to infer local and regional circulation circuits. It employs archaeological, archival, and geochemical methods to characterize samples of 26 wound wire bracelets, bangles, anklets, necklaces, and other forms of expressive and decorative wear excavated from the southern terrace, (Hill Complex) at Great Zimbabwe. The samples were macroscopically, microscopically, chemically and isotopically characterized to understand the technique of manufacture, chemical composition, lead isotopic ratios and the starting composition of uranium and thorium in relation the model ages. The Pb isotopic data calculated 238U/204Pb (μ), 232Th/ 238U(κ) ratios and estimated model ages (T) were compared with published lead isotopic ratios from various ore samples from central and southern Africa. Within opportunities afforded by the historical record and limitations imposed by small sample sizes especially of the comparative geology, indications are that the studied objects were produced using ores matching the Cu-Ni mineralization at Empress Mine (in Zimbabwe), Cu Ag and Cu Pb Zn Ag mineralization associated with the Kundelungu Plateau (bordering Zambia and Democratic Republic of Congo). This suggests that Great Zimbabwe participated directly and indirectly in the vibrant micro, regional and interregional circulation of copper and other resources. Future work, must however, add more trace element data from the objects and increase the number of samples from ancient mines and other sites to develop a fuller picture of the movement of copper in Iron Age southern Africa through space and time.

In July 2020 France returned 24 human remains to Algeria, designating it as a ‘loan’ renewable every five years. These human remains, identified as skulls, by some considered as “war trophies”, were believed to belong to Algerian soldiers and tribal chiefs who fought against the French army’s invasion in the early 19th century. They are today buried in the Carré des Martyrs in Algiers, alongside other prominent figures from Algerian independence and politics. However, a New York Times investigation revealed in October 2022, that only 6 out of the 24 skulls had been clearly identified as belonging to resistance soldiers, while the rest were either of uncertain provenance or imprisoned thieves, and three were of soldiers of Algerian origin who had fought in the ranks of the French Army.  This thesis explores the intricate details, perspectives and interpretations that led to this contentious restitution. It argues that, while few people theoretically opposed the restitution, numerous complicated factors made the restitution multilayered and complex, and culminated in the oxymoronic notion of a permanent ‘loan’. The thesis analyses the various reasons behind the conclusions presented by The New York Times article. Three major groups significantly influenced the outcome of restitution: civil society, museums, and governments. The central argument revolves around the general taboo that has long existed regarding the crimes committed in the former French colonies, the reluctance of museums and the Ministry of Culture to accept restitutions, and the political exploitation of restitutions of cultural property and human remains for diplomatic, nationalistic and economic purposes.

Stone plays an inextricable role in the lives of Andean peoples and the monumental stoneworks of pre-Hispanic cultures stand in memorial to the experiences and beliefs of those who created them. Stone is often selected as a medium for symbolic works due to its durability and perceived permanence, but in the Andes, its meaning expands beyond its physical properties. Stone was an extension of the animate landscape that both sheltered and endangered its inhabitants. Stories were attached to stones, whether natural or modified, to embed knowledge of the landscape and of history in the memory of communities. Centuries later, archaeologists utilize modified stones and constructed monuments as a window to understand long past societies. As our own technological abilities expand, we are able to garner even deeper understandings of the way stones were used and the meanings they may have once held. High in the Peruvian Andes, in a small city renown for its natural beauty and ecological adventures, there is a modest museum, where hundreds of once powerful stone ancestors are visited by school groups and tourists, receiving words of wonder in place of the offerings of coca, chicha, and music once granted to them by their human children and grandchildren known today as the Recuay people. These carved figures give clues to their meaning through their crouched mummified positions and their accoutrements of power, warfare, and fertility. But much of their histories have been lost, as looting, religious persecution, and local curation have moved almost all of these ancestors from their resting places, erasing clues about their roles and meaning in the society that made them. Utilizing a Holistic Approach to craft production (Shimada and Craig 2013; Shimada and Merkel 1987; Shimada and Wagner 2007), this research seeks to recontextualize these powerful Recuay ancestors that once populated the Huaraz region of highland Ancash (ca. 100-700 CE) through an investigation of their making. Each choice and action in the process of production reveals important information about broader technological systems, social, political, and economic relationships, and the cosmologies and belief systems of the makers. Incorporating multiple lines of evidence from geochemical and technological analysis, as well and surveys of archaeological sites, interviews with modern stone sculptors, and experimental testing of manufacturing techniques, this research provides a reconstruction of the entire production sequence for Recuay stone ancestors, from the selection, procurement, and dispersal of raw materials to the techniques, tools, and settings employed in manufacturing. This research offers an example of the efficacy of the Holistic Approach to gain sociocultural insights from material records of the process of production through direct evidence of manufacturing and to overcome limitations regarding artifact provenience. Additionally, the robust geochemical analysis outlined here provides a replicable approach to semi-quantitative sourcing studies through non-destructive portable X-Ray Fluorescence spectroscopy, with an analytical approach that is as accessible as equipment operation. As a rare case study in pre-Inkaic stone quarrying and carving, this research showcases the technological and symbolic variability within a centuries long belief system that recognized the animate landscape and treated extracted materials as an extension of those forces. Over the course of this 600 year long carving tradition, Recuay artisans altered the forms and iconographic details of these important sculptures, but the production techniques, surface treatments, and raw materials remained remarkably consistent. Only four geologic sources provided raw materials for 96% of analyzed sculptures in this regional assemblage across three different volcanic stone types, including two long-hypothesized quarries, Pongor and Cerro Walun. Over 97% of sculptures across all volcanic, sedimentary, and plutonic stone types shared a specially crafted surface treatment that differed from other Recuay stoneworks and from stone sculptures of preceding cultures in the region. Investigations at the confirmed quarry site of Cerro Walun reveal contextualized insights about the infrastructure of stone quarrying and carving and its close association with tombs and venerated, animate landscapes. Combined with understandings of communal ancestor veneration and intercommunity socio-political negotiations among the Recuay, we see that these stone figures and the process of creating them played an active role in the expression and maintenance of relationships and knowledge between communities and across generations.

<p> This report is the only detailed study concerning the fresh water cobble beaches of the Georgian Bay Islands. It includes extensive studies on the morphological characteristics, especially the platform development and profile configuration, and the sedimentary provenance of the cobbles. </p> <p> It was found that the platform configuration (step topography) acts as a substrate control for the cobble beaches. The presence of two cobble generations, angular and well-rounded, indicate that t he shore platform is the source for these cobble beaches. </p> <p> The roundness values of these cobble generations depends on t heir mode of transport. Evidence indicates that longshore movement of cobbles increases their roundness values, but their angular shape i s indicative of their lack of transport. </p> <p> Very little proof was found within this study to correlate relict cobble beaches with any specific stage of the Lake Huron Basin, although it was possible to generalize and state that the relict cobble beaches were generated by high-energy wave events during the transition from the Algoma stage to Lake Huron. </p> <p> Clast analysis determines the relationship between the length of the wave fetch and its related energy environment. It was found that high-energy coastal environments have oblate cobbles with a high roundness and low sphericity. In each case, the samples were associated with a large fetch. Those cobbles of a low-energy coastal environment have a high sphericity, low roundness, and are associated with smaller fetches. </p> <p> The steepness of the beach profile results from the increase in wave height, generated by an increase in shallowness. It also depends upon the volume of backwash. The backwash is reduced by the increased percolation rates through the cobbles, thus reducing the combing down effect of the backwash. </p> <p> This study also provides a discussion on the minor morphological features such as sinkholes and imbrication. </p> / Thesis / Bachelor of Arts (BA)

<p> The Archean "Loose Pebble Bay" conglomerate, Manitou Lake, northwestern Ontario, contains a variety of clast types, not all of which can be readily ascribed to local lithologies. This study was undertaken to determine the modal clast composition of the conglomerate, and investigate the origin of the clasts. The conglomerate lies near the top of a stratigraphic sequence which includes mafic and felsic volcanic rocks, iron formations, conglomerates, sandstones and argillites. The conglomerate unit itself consists of interbedded conglomerate and sandstone, and probably represents a channel-fill deposit of an ancient submarine fan.</p> <p> Modal percentages of clast types were obtained using a line-intercept method. They indicate that most of the debris in the conglomerate can be reasonably attributed to uplift and erosion of the lateral equivalents of the underlying stratigraphy, except for the granitoid clasts, which have no known origin within the area.</p> <p> Petrographic examinations of the clasts indicate that field identifications must be confirmed with thin section investigations.</p> <p> The modal composition of granitoid clasts was determined utilizing both thin sections and stained slabs. Most of the granitoid clasts are granodiorite, or lie just within the granite field, adjacent to the granodiorite field. Textural studies of the granitoid clasts suggest that gneissic and allotriomorphic-granular textured rocks may have formed by deformation or partial recrystallization along grain boundaries of previously hypidiomorphic-granular rocks. Textures generally indicate intrusive origin and slow cooling, although two granophyric samples may have solidified at relatively shallower depths than the other granitoid rocks.</p> <p> The textures and compositions of most of the granitoid clasts suggest that they were derived from one intrusive body. Intrusion of such a body into the volcanic-sedimentary belt, followed by uplift and erosion, would account for the presence in the "Loose Pebble Bay" conglomerate of granitic clasts and clasts similar to the underlying rocks. However, no evidence of such an intrusion has been found in the Manitou Lake area, and two of the granitoid clasts are noticeably different in composition from the others. The possibility of a pre-existing sialic basement cannot be ruled out.</p> / Thesis / Bachelor of Science (BSc)

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No description available.

No description available.

The Upper Devonian Catskill Formation represents marginal marine and alluvial sediments which prograded into the Appalachian Basin during the Acadian Orogeny. Distributive fluvial systems (DFS) are prevalent in modern actively aggrading basins in all tectonic and climatic regimes and may be common in the rock record. In this study, I reinterpret the Catskill Formation as a prograding distributive fluvial system (DFS) on the basis of up-section variability in paleosols, channel sandstone textural trends, and alluvial architecture. At least three distinct pedotypes representative of prevailing soil forming conditions are identified during deposition of the Irish Valley, Sherman Creek, and Duncannon Members of the Catskill Formation. Increased paleosol drainage is inferred from an up-section transition from hydromorphic aqualfs within the Irish Valley Member to non-calcareous, uderts within the Duncannon Member. Qualitative field observations of channel sandstone morphology show an increase in channel size up-section. Channels occur as small isolated bodies at the base of the section, transitioning to relatively larger, amalgamated channels, and finally, large isolated channel bodies up-section. Sandstones are litharenites and coarsen-upward throughout the Catskill Formation overall. This coarsening upward trend results from increasing paleo-flow competency in larger channels up-section. These results are consistent with deposition of the Catskill Formation by DFS processes and demonstrate the utility of paleopedological analysis in interpreting alluvial depositional processes. Identifying DFS in the rock record has implications for paleosol-based paleoclimatic studies, as paleosols forming on prograding DFS have increased paleosol drainage up-section, which could potentially be misinterpreted as a shift from prevailing humid to arid paleoclimatic conditions. Recognition of DFS in the rock record also has implications for basin analysis and exploration of fluvial aquifers and hydrocarbon reservoirs, as the stratigraphic architecture of DFS are fundamentally different from tributary systems at the basin scale. / Geology

Collaborative health research environments usually involve sharing private health data between a number of participants, including researchers at different institutions. Inclusion of AI systems as participants in this environment allows predictive analytics to be applied on the research data and the provision of better diagnoses. However, the growing number of researchers and AI systems working together raises the problem of protecting the privacy of data contributors and managing the trust among participants, which affects the overall collaboration effort. In this thesis, we propose an architecture that utilizes blockchain technology for enabling verifiable trust in collaborative health research environments so that participants who do not necessarily trust each other can effectively collaborate to achieve a research goal. Provenance management of research data and privacy auditing are key components of the architecture that allow participants’ actions and their compliance with privacy policies to be checked across the research pipeline. The architecture supports distributed trust between participants through a Linked Data-based blockchain model that allows tamper-proof audit logs to be created to preserve log integrity and participant non-repudiation. To maintain the integrity of the audit logs, we investigate the state-of-the-art methods of generating cryptographic hashes for RDF datasets. We demonstrate an efficient method of computing integrity proofs that construct a sorted Merkle tree for growing RDF datasets based on timestamps (as a key) that are extractable from the dataset. Evaluations of our methods through experimental realizations and analyses of their resiliency to common security threats are provided. / Thesis / Master of Science (MSc) / Collaborative health research environments involve the sharing of private health data between a number of participants, including researchers at different institutions. The inclusion of AI systems as participants in this environment allows predictive analytics to be applied on the research data to provide better diagnoses. In such environments where private health data is shared among diverse participants, the maintenance of trust between participants and the auditing of data transformations across the environment are important for protecting the privacy of data contributors. Preserving the integrity of these transformations is paramount for supporting transparent auditing processes. In this thesis, we propose an architecture for establishing verifiable trust and transparency among participants in collaborative health research environments, present a model for creating tamper-proof privacy audit logs that support the privacy management of data contributors, and analyze methods for verifying the integrity of all logged data activities in the research environment.