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Browsing Geological Sciences Theses and Dissertations by Title
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Now showing items 75-94 of 164
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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 ...
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(University of Oregon, 2018-09-06)Kyrgyzstan is the single most seismically active country in the world. Accessing the past, and therefore future hazard of faults, necessitates a high-resolution understanding of the timing of different geologic events. ...
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(University of Oregon, 2016-10-27)Landscapes respond to external perturbations over a variety of timescales, including million-year tectonic forcing, millennial to decadal climate fluctuations, and minutes-long high intensity storms or large magnitude ...
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(University of Oregon, 2011-06)Caldera-forming eruptions are dramatic and destructive natural phenomena, causing severe and sustained consequences to society. This dissertation presents new geochemical and geochronologic data for caldera-forming tuffs ...
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(University of Oregon, 2011-12)The Gulf of California is an active rift basin formed by late Cenozoic dextral-oblique extension along the Pacific-North America plate boundary. Well exposed volcanic and sedimentary rocks in the Sierra Bacha, coastal ...
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(University of Oregon, 2019-09-18)To investigate the late-stage dynamics of the eruption of a compositionally and thermally zoned magma body, we targeted crystal-scale features in the stratigraphically latest fall unit (F9) of the 0.765 Ma Bishop Tuff. ...
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(University of Oregon, 2022-02-18)The Mendocino Triple Junction (MTJ) joins the Gorda, Pacific, and North American plates and migrates northward leaving the San Andreas Fault in its wake. This affects subduction-related stress conditions that control ...
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(University of Oregon, 2016-02-23)Erosive landscapes are formed from the amalgamation of individual sediment transport over space and time. Though sediment transport is readily observable at the grain and event scales, determining how these events conspire ...
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(University of Oregon, 2015-08-18)The triumvirate of tectonics, lithology, and climate control landscape evolution. This study quantifies how lithologic variation and climate-mediated changes in ecosystems perturb steady state processes in the unglaciated, ...
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(University of Oregon, 2023-03-24)This dissertation summarizes the work of integrating machine-learning and traditional seismic analysis techniques into large and small earthquake problems. Earthquake early warning for large magnitude earthquakes is one ...
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(University of Oregon, 2019-09-18)Despite multidisciplinary evidence for crustal magma accumulation below Santorini Volcano, the structure of the shallow magmatic system remains elusive. We use tomographic inversions of P-wave, active-source seismic data ...
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(University of Oregon, 2011-03)Volatile components (H 2 O, CO 2 , S, Cl) dissolved in magmas influence all aspects of volcanic activity from magma formation to eruption explosivity. Understanding the behavior of volatiles is critical for both mitigating ...
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(University of Oregon, 2021-04-27)Rice contamination by arsenic and cadmium is a well-documented challenge that impact billions of people globally. Our goal is to quantify the extent to which magnetite and manganese dioxide could be used as rice paddy ...
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(University of Oregon, 2017-09-27)It is clear that ecosystems are devastated after a volcanic eruption coats the landscape with a layer of ash; however, the ecological recovery of mammalian communities after eruptions is poorly understood. Volcanic eruptions ...
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(University of Oregon, 2017-09-06)In this dissertation, I use seismic imaging techniques to constrain the physical state of the upper mantle beneath regions of young oceanic lithosphere. Mantle convection is investigated beneath the Galápagos Archipelago ...
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(University of Oregon, 2012)Primitive, mantle-derived magmas provide important clues about the formation and equilibration conditions of magmas at depth. In subduction zones, it is uncommon for primitive magmas to ascend through the shallow mantle ...
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(University of Oregon, 2024-08-07)Rockfall is a common occurrence in steep mountainous terrain which poses a hazard to nearby communities. It is useful to determine the likelihood of rockfall initiating from a given location, or rockfall susceptibility, ...
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(University of Oregon, 2018-04-10)Magma chambers are a fundamental component of crustal magma transport modulating erupted volumes, compositions, and timing of eruptions. However, we understand little about how eruption episodicity relates to magma chamber ...
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(University of Oregon, 2024-08-07)The planet Venus appears to be the only geologically active planet in the solar system at present, aside from Earth. This long-sustained activity is reflected by globally distributed tectonic and volcanic features and ...
Now showing items 75-94 of 164