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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
121

Depositional Architecture of a Near-Slope Turbidite Succession: Upper Kaza Group, Windermere Supergroup, Castle Creek, British Columbia, Canada

Rocheleau, Jonathan 26 July 2011 (has links)
An expansive panel of well exposed (periglacial) strata of the Upper Kaza Group permitted a detailed study of the stratal architecture of proximal basin floor deposits in the Neoproterozoic Windermere turbidite system. Detailed stratigraphic and petrographic analyses identified six lithofacies: poorly-sorted, clast-rich mudstone (F1), thin-bedded siltstone and mudstone (F2), thick-bedded, massive sandstone (F3), medium-scale, cross-stratified sandstone (F4), mudstone-clast breccia (F5), and medium-bedded turbidites (F6). The spatial distribution of these facies identify five architectural elements: heterolithic feeder channel deposits (FA1), thin-bedded intralobe turbidites (FA2), terminal splay deposits (FA3), distributary channel deposits (FA4), and isolated scours (FA5). FA 1-4 are genetically related and form the basic building blocks of large-scale basin floor depositional lobes. FA 5, which is isolated to the stratigraphic top of the study area, is interpreted to have formed in a base-of-slope setting, and its superposition on FA 1-4 suggests the long-term progradation of the Windermere turbidite system.
122

Recent volcanic and tectonic evolution of the Southern Mariana arc

Becker, Nathan C January 2005 (has links)
Thesis (Ph. D.)--University of Hawaii at Manoa, 2005. / Includes bibliographical references (leaves 150-166). / Also available by subscription via World Wide Web / xv, 166 leaves, bound col. ill., col. maps (1 fold.) 29 cm
123

Tectonic consequences of mid-ocean ridge evolution and subduction

Whittaker, Joanne January 2008 (has links)
Doctor of Philosophy(PhD) / Mid-ocean ridges are a fundamental but insufficiently understood component of the global plate tectonic system. Mid-ocean ridges control the landscape of the Earth's ocean basins through seafloor spreading and influence the evolution of overriding plate margins during midocean ridge subduction. The majority of new crust created at the surface of the Earth is formed at mid-ocean ridges and the accretion process strongly influences the morphology of the seafloor, which interacts with ocean currents and mixing to influence ocean circulation and regional and global climate. Seafloor spreading rates are well known to influence oceanic basement topography. However, I show that parameters such as mantle conditions and spreading obliquity also play significant roles in modulating seafloor topography. I find that high mantle temperatures are associated with smooth oceanic basement, while cold and/or depleted mantle is associated with rough basement topography. In addition spreading obliquities greater than > 45° lead to extreme seafloor roughness. These results provide a predictive framework for reconstructing the seafloor of ancient oceans, a fundamental input required for modelling ocean-mixing in palaeoclimate studies. The importance of being able to accurately predict the morphology of vanished ocean floor is demonstrated by a regional analysis of the Adare Trough, which shows through an analysis of seismic stratigraphy how a relatively rough bathymetric feature can strongly influence the flow of ocean bottom currents. As well as seafloor, mid-ocean ridges influence the composition and morphology of overriding plate margins as they are consumed by subduction, with implications for landscape and natural resources development. Mid-ocean ridge subduction also effects the morphology and composition of the overriding plate margin by influencing the tectonic regime experienced by the overriding plate margin and impacting on the volume, composition and timing of arc-volcanism. Investigation of the Wharton Ridge slab window that formed beneath Sundaland between 70 Ma and 43 Ma reveals that although the relative motion of an overriding plate margin is the dominant force effecting tectonic regime on the overriding plate margin, this can be overridden by extension caused by the underlying slab window. Mid-ocean ridge subduction can also affect the balance of global plate motions. A longstanding controversy in global tectonics concerns the ultimate driving forces that cause periodic plate reorganisations. I find strong evidence supporting the hypothesis that the plates themselves drive instabilities in the plate-mantle system rather than major mantle overturns being the driving mechanism. I find that rapid sub-parallel subduction of the Izanagi mid-ocean ridge and subsequent catastrophic slab break o_ likely precipitated a global plate reorganisation event that formed the Emperor-Hawaii bend, and the change in relative plate motion between Australia and Antarctica at approximately 50 Ma
124

An investigation of the crustal structure of the Clipperton transform fault area using 3D seismic tomography /

Van Avendonk, Hermanus Josephus Antonius, January 1998 (has links)
Thesis (Ph. D.)--University of California, San Diego, 1998. / Vita. Includes bibliographical references.
125

Creation of a visial Resource to Aid

Sena, Marie R. January 2008 (has links)
Thesis (M.S.) -- University of Texas Southwestern Medical Center at Dallas, 2008. / Vita. Bibliography: p.64
126

Hot spot mitigation in microprocessors by application of single phase microchannel heat sink and microprocessor floor planning

Chauhan, Anjali. January 2009 (has links)
Thesis (M.S.)--State University of New York at Binghamton, Thomas J. Watson School of Engineering and Applied Science, Department of Mechanical Engineeering, 2009. / Includes bibliographical references.
127

Origin and evolution of the West Philippine Basin

Lee, Chao-Shing, January 1983 (has links)
Thesis (Ph. D.)--Texas A & M University, 1983. / Vita. Includes bibliographical references (leaves 110-120).
128

Oceanic transform boundaries rheology, dynamics, and the age offset limit /

Sheaffer, Steven D. January 1995 (has links)
Thesis (M.S.)--Pennsylvania State University, 1995. / Includes bibliographical references (leaves 68-70).
129

Taking the stairs environmental features that explain why people use stairs in 3 to 4 story academic workplace buildings /

Nicoll, Gayle. January 2006 (has links)
Thesis (Ph. D.)--Architecture, Georgia Institute of Technology, 2007. / Dr. Craig Zimring, Committee Chair ; Dr. John Peponis, Committee Member ; Dr. Harold H. Kohl, Committee Member ; Dr. Abir Mullick, Committee Member ; Dr. Andrew Dannenberg, Committee Member.
130

The nature and origin of fine-scale sea-floor relief /

Shih, John Shai-Fu. January 1979 (has links)
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980. / Supervised by Tanya Atwater. Vita. Includes bibliographical references (leaves 206-213).

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