Thesis (Ph. D.)--University of London. / Bibliography: p. [192]-206.

Texte remanié de: PhD thesis--University of Toronto.

The Early Proterozoic Agnew Intrusion is a well-preserved leucogabbronoritic to gabbronoritic layered intrusion that is a member of the East Bull Lake suite of layered intrusions (ca. 2490-2470 Ma) occurring in central Ontario. These intrusions are related to the development of the Huronian Rift Zone, which may be part of a much more widespread rifting event that involved the Fennoscandian Shield. Structural data suggest that these intrusions have been subjected to ductile deformation and are erosional remnants of one or more sill-like bodies originally emplaced along the contact between Archaean granitic rocks of the Superior Province and an Early Proterozoic Huronian continental flood basalt sequence in the Southern Province.

The Early Proterozoic Agnew Intrusion is a well-preserved leucogabbronoritic to gabbronoritic layered intrusion that is a member of the East Bull Lake suite of layered intrusions (ca. 2490-2470 Ma) occurring in central Ontario. These intrusions are related to the development of the Huronian Rift Zone, which may be part of a much more widespread rifting event that involved the Fennoscandian Shield. Structural data suggest that these intrusions have been subjected to ductile deformation and are erosional remnants of one or more sill-like bodies originally emplaced along the contact between Archaean granitic rocks of the Superior Province and an Early Proterozoic Huronian continental flood basalt sequence in the Southern Province.

Thesis (Ph.D.)--McMaster University, 2006. / Supervisor: K. Cruikshank. Includes bibliographical references (leaves 344-370).

Doctoral thesis--Bochum--Ruhr-Universität, 1987.

Thesis (M.A.)--Carleton University, 2001. / Includes bibliographical references (p. 159-168). Also available in electronic format on the Internet.

This study examines the reasons behind the decline in public transport patronage in Melbourne between 1950 and 1990, through a comparison with Toronto. The share of urban travel undertaken by public transport has declined since the Second World War in all developed countries, but public transport patronage in Melbourne appears to have declined more rapidly than in most other industrialised cities. Public transport has, however, gained or held ground in Toronto, where the form of development is similar in many ways to Melbourne. Most accounts of Toronto’s success (particularly in Australia) regard transport/land-use integration as the critical factor. The contrasting analysis maintains that Melbourne’s urban form has changed over this period to a dispersed, car-oriented pattern. This study evaluates a different interpretation of the ‘Toronto model’. This is that Toronto has undergone similar urban changes to Melbourne since the war, but has found a way of operating public transport successfully in a relatively dispersed environment. The contrast with Melbourne, then, is not primarily in land-use patterns, but in policies towards the operation of public transport.

Forests play an important role in the net ecosystem exchange of CO2 in terrestrial ecosystems. Soil respiration is often the major source of CO2 in forests and is greatly influenced by climatic variability and management practices. Spatial and temporal variations of soil respiration have been examined in a chronosequence (60, 30, 15, and 1 year-old) of temperate, afforested, white pine (Pinus strobus) forest stands in Southern Ontario, Canada, in order to investigate any age related differences. Spatial and temporal variations of soil respiration in a 74 year-old boreal, mixed-wood forest in Central Ontario, was also studied and compared with results from the 60 year-old, temperate, white pine, forest stand, in order to investigate any climate related differences. Soil CO2 flux, temperature, and moisture were measured for one year (June 2003 to May 2004, inclusive, for the chronosequence study, and August 2003 to July 2004, inclusive, for the boreal-temperate study). In all stands, temporal variability of soil respiration followed the seasonal pattern of soil temperature, reaching a minimum in winter and maximum in summer. Temporal variability of soil temperature was able to explain 80 to 96% of the temporal variability in soil respiration at all stands. Spatial variability in soil respiration was also observed at all stands and the degree of this variability was seasonal, following the seasonal trend of mean daily soil respiration. Spatial variability of some soil chemical properties was highly correlated with the spatial variability of soil respiration, while litter thickness was not. The location of soil respiration measurement with respect to tree trunks may also help to explain some of the spatial variability in soil respiration. Across the chronosequence, the highest mean daily CO2 efflux was observed during the growing season for the 15 year-old-stand (5.2 ± 1.3 to 0.4 ± 0.2 μmol CO2 m^-2 s^-1), which was comparable to the 60 year-old-stand (4.9 ± 1.3 to 0.2 ±0.1 μmol CO2 m^-2 s^-1), but higher than the 30 year (3.8 ± 0.9 to 0.2 ± 0.0 μmol CO2 m^-2 s^-1) and 1 year (2.9 ± 0.9 to 0.3 ± 0.3 μmol CO2 m^-2 s^-1) old stands. From boreal-temperate comparison, it was observed that mean daily soil respiration rates for the boreal stand (6.9 ± 1.7 to 0.5 ±0.1 μmol CO2 m^-2 s^-1) were higher during the growing season compared to the 60 year-old temperate forest stand. Understanding temporal and spatial variability of soil respiration and how it is controlled is essential to improving forest ecosystem carbon budget assessments, and subsequently, the global carbon budget. This study will contribute direct observations necessary for improving and validating forest ecosystem CO2 exchange models. / Thesis / Master of Science (MSc)

This dissertation explores the origins and development of Northern Iroquoian village life in present-day southern Ontario, from the first appearance of durable domestic architecture in the 10th century A.D., to the formation of large villages and towns in the 15th century A.D. Twenty-five extensively excavated village sites are analyzed in terms of the configuration of exterior and interior space, with a view to placing the social construction of community at the centre of the problem of early village development. Metric and space-syntax measures of the configuration of outdoor space reveal coordinated developments in the scale of houses and villages, their built-densities, and the structure of exterior accessibility networks, that involved the emergence of a “local-to-global” pattern of order with village growth. Such a pattern, I argue, was experientially consonant with a sequential hierarchy of daily social encounters and interactions that was related to the development of factional groups. Within the longhouse, a similarly “nested” pattern of spatial order and associated social identities emerged early in the history of village development, but was elaborated and ritualized during the later 13th century as the longhouse became the primary body through which political alliances involving village coalescence were negotiated. I suggest that the progressive extensification of collective social groups associated with longhouse expansions and village coalescences involved the development of “conjoint” personhood and power in a context of predominantly mutualistic village economies and enduring egalitarian ideals. The ritualization of domestic space during this process reveals that the continual production and extension of social group identities – such as the matrilineage – was contingent upon “social work” accomplished through an ongoing generative engagement with the built environment.