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Browsing Geological Sciences Theses and Dissertations by Title
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Now showing items 57-76 of 164
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(University of Oregon, 2021-11-23)The goal of my dissertation is to expand the application of H2O, δD, and δ18O in silicic volcanic glass to a greater diversity of pyroclast cooling, degassing, and rehydration histories. All pyroclasts must cool from ...
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Hawk Rim: A Geologic and Paleontological Description of a New Barstovian Locality in Central Oregon (University of Oregon, 2012)Hawk Rim represents a new mid-Miocene site in Eastern Oregon. This time period offers a rare chance to observe dramatic climatic changes, such as sudden warming trends. The site is sedimentologically and stratigraphically ...
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(University of Oregon, 2014-09-29)Critical inputs to evaluate fault behavior models include the frequency of large earthquakes on plate boundary faults, amount of displacement, style of deformation in these events, and how these earthquakes are associated ...
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(University of Oregon, 2024-01-09)Detailed field studies of past eruptions contribute to constraining the input parameters used to forecast tephra dispersion and mitigate potentially fatal volcanic hazards. It is thus of the utmost importance to understand ...
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(University of Oregon, 1931-06)
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(University of Oregon, 2016-11-21)Icebergs calved from tidewater glaciers represent significant portions of freshwater flux from the Greenland Ice Sheet to the ocean. Using satellite data sets we quantify properties and distributions of icebergs in three ...
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(University of Oregon, 2024-01-09)Geomorphology leverages the competition between processes of uplift and erosion to infer geologic time-scale forcing on the earth's upper crust. While this framework has revolutionized our understanding of global mountain ...
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(University of Oregon, 2013-10-03)Rates of microbial reactions are important in understanding groundwater chemistry and bioremediation. In aquifers, microbial rates depend on physicochemical and biological factors and also on how groundwater transport ...
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(University of Oregon, 2013-07-11)Volatile emissions from Cascades cinder cone eruptions have been well-documented; however the implications for understanding the effects that volcanic gases have on surrounding communities have not been addressed. This ...
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(University of Oregon, 2024-08-07)Soil and water quality are global concerns that significantly impact human health and the environment. As the demand for soil and water resources increases, it is essential to understand the reactions that govern the fate ...
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(University of Oregon, 2024-08-07)This dissertation utilizes a variety of mapping techniques to explore surface and subsurface processes at different volcanic systems. As each volcanic system is unique, it is important to understand which mapping methods ...
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(University of Oregon, 2021-11-23)Microbial kinetics study on the microbial metabolic rates and their dependence on biological and environmental conditions. It has been widely used in biogeochemical models. However the empirical nature of microbial kinetics ...
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(University of Oregon, 2024-08-07)This dissertation focuses on studying past and future large subduction zone earthquakes through creating and utilizing a stochastic slip rupture modeling technique in combination with deformation and tsunami modeling. Here, ...
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(University of Oregon, 2020-02-27)In extensional volcanic arcs, tectonic and magmatic processes control the evolution of eruptive centers and their surrounding regions. Faulting, which increases crustal permeability, can focus magmatism and preferentially ...
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(University of Oregon, 2010-06)The bedrock aquifer of the Southern Willamerte Basin, Oregon, USA, is contaminated with arsenic at concentrations as high as several ppm. Single-well push-pull tests were conducted to investigate how microbial metabolisms ...
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(University of Oregon, 2024-01-10)Planetary magnetic fields in our Solar System exhibit a wide range of configurations, from unmagnetized Venus and Mars to the complex dipole magnetic fields of Uranus and Neptune. This dissertation investigates the influence ...
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(University of Oregon, 2011-12)Large-volume calderas are responsible for producing large deposits of rhyolite and high-silica rhyolite, but the mechanisms by which these deposits are produced are still poorly understood. The Kamchatka Peninsula of Russia ...
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(University of Oregon, 2014-06-17)Rhyolites of the Picabo volcanic field (10.4-6.6 Ma) of the Yellowstone hotspot in eastern Idaho are preserved as thick ignimbrites and lavas along the margins of the Snake River Plain. This study presents new O and Hf ...
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(University of Oregon, 2016-11-21)Subduction zone fault processes range from tsunami-generating megathrust events to aseismic creep along the deeper portions of the fault. Episodic tremor and slow slip (ETS) represents the transition between these two ...
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(University of Oregon, 2011-12)The physical weathering of rock in cryogenic regions through a process called ice segregation is important for understanding subglacial processes, landscape evolution and cold region engineering. Ice segregation was examined ...
Now showing items 57-76 of 164