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Browsing Geological Sciences Theses and Dissertations by Title
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Now showing items 11-30 of 164
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(University of Oregon, 2021-04-29)Granular flows are particle-laden gravity currents that are ubiquitous in nature in a variety of different geologic settings. Their high mobility and potential for harm to human populations and infrastructure motivate ...
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(University of Oregon, 1977-09)The purpose of this project was twofold - to synthesize several electron microprobe glass standards in the system: SiO2 - Al 2O 3 -- Cao -- MgO, and to utilize these standards in empirically calculating a set of binary ...
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(University of Oregon, 2015-08-18)Carbon and oxygen isotopes in calcite crystals provide a record of the environmental conditions under which the crystals formed. To investigate the influence of temperature, pH, and growth rate on isotope discrimination ...
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(University of Oregon, 2018-09-06)Large earthquakes often exhibit complex slip distributions and occur along non-planar faults, resulting in variable stress changes throughout the fault region. To better discern the role of stress changes and fluid flow ...
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(University of Oregon, 2022-02-18)Hogg Rock is a basaltic-andesite dome located in the Central Oregon Cascades. Its flat top, steep sides, and glacial striations and lakes have led to the interpretation that Hogg Rock was a dome that erupted subglacially. ...
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(University of Oregon, 2009-09)Spatial and temporal patterns of movement of the Boulder Creek earthflow were investigated using 26 interferograms derived from ALOS satellite radar images acquired between February 2007 and February 2008. Persistently ...
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(University of Oregon, 2022-02-18)Uranus and Neptune have dynamic magnetopause interfaces to the solar wind due to the orientation of their rotation and magnetic axes. The magnetohydrodynamic plasma description suggests that solar wind conditions in the ...
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(University of Oregon, 2024-03-25)Contamination of ground and well water by Cr and V from anthropogenic and geogenic sources has gained considerable attention over the last few decades due to environmental and public health concerns. The specific threat ...
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(University of Oregon, 2011-12)Whether or not a causal relationship exists between climate and mammal body size is one of the longest-standing and most intractable questions in ecology. The classic model of body size evolution (Bergmann's Rule) holds ...
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(University of Oregon, 2018-04-10)Feedbacks between climate, tectonics and erosion drive mineral dissolution in the subsurface and may provide strong controls on chemical weathering as a mechanism for modulating climate through CO2 drawdown. However, few ...
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(University of Oregon, 2021-04-27)Traditional, empirical ground-motion models (GMMs) are developed by prescribing a functional form between predictive parameters and ground-motion intensity measures. Machine learning techniques may serve as a fully data-driven ...
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(University of Oregon, 2009-09)Different models have been proposed for the "drumbeat" earthquakes that accompanied recent eruptive behavior at Mount St. Helens. Debate continues as to whether seismicity is related to brittle failure during the extrusion ...
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(University of Oregon, 2009-12)This dissertation discusses the contribution of deep-seated landslides and earthflows to the morphology, erosion, and evolution of mountainous landscapes, focusing on the northern California Coast Ranges. In active ...
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(University of Oregon, 2015-08-18)Landslides display a wide variety of behaviors ranging from slow persistent motion to rapid acceleration and catastrophic failure. Given the variety of possible behaviors, improvements to our understanding of landslide ...
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(University of Oregon, 2010-12)To explain the origin of several distinct aspects of the Galápagos volcanic hotspot, such as the broad geographical extent of recent volcanism and the unusual pattern of geochemical anomalies, we conducted seismic tomography ...
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(University of Oregon, 2015-08-18)Reaches dominated by debris flow scour and incision tend to greatly influence landscape form in steepland basins. Debris flow networks, despite their ubiquity, have not been exploited to develop erosion rate proxies. To ...
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(University of Oregon, 2020-09-24)Empirical thresholds for landslide warning systems have benefitted from the incorporation of soil-hydrologic monitoring data, but the mechanistic basis for their predictive capabilities is limited. Although physics-based ...
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(University of Oregon, 2007-12)Klyuchevskoy volcano, located in Kamchatka's subduction zone, is one of the most active arc volcanoes in the world and contains some of the highest 8180 values for olivines and basalts. I present an oxygen isotope and melt ...
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(University of Oregon, 2023-03-24)The arc-continent collision system has been considered as a primary mechanism in the growth of continental crust, which involves development of both rising eroding mountains and subsiding syn-orogenic basins. However, the ...
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(University of Oregon, 2012)Convergent plate boundaries evolve through the dynamic interaction between subducting oceanic lithosphere, overriding lithosphere, and adjacent flow of the convective mantle. These lithospheric plates contain remarkable ...
Now showing items 11-30 of 164