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Source, evolution, and eruptive history of the Cold Spring Creek volcanics, Beaverhead County, Montana

Creator:: Ivy, Susan Denise
Resource Type:: Masters Thesis
Full Text:: Taylor and Ricardo Pytkowicz. Robert Pearson of the Survey in Denver took time to introduce me to the

Late Cenozoic Climate, Ice-sheet and Earth-surface Evolution Derived from Terrestrial and Marine Sedimentary Archives

Creator:: Bill, Nicholas S.
Abstract:: The goals of this dissertation are centered on understanding changes in Earth surface and climate systems through the use of geologic proxies as records of past changes in these systems. Specifically, this dissertation (1) establishes a new chronology for retreat of the Ross Sea sector of the West Antarctic Ice...
Resource Type:: Dissertation
Full Text:: . Hall, B.L., and Denton, G.H., 2000, Radiocarbon Chronology of Ross Sea Drift, Eastern Taylor Valley

The Deschutes Formation: evidence of extension-enhanced explosivity in the early High Cascades

Creator:: Pitcher, Bradley W.
Abstract:: The eruptive history of the Quaternary Cascades arc has been relatively well characterized. However, much less is known about the frequency and sizes of explosive eruptions produced by earlier stages of the arc. The Late Neogene Deschutes Formation of Central Oregon preserves a remarkable record of heightened pyroclastic activity during...
Resource Type:: Dissertation
Full Text:: eruptions (Priest, 1990; Taylor, 1990). Thus, the Deschutes Formation records a transitional period of

Late Pleistocene Slip Rate along the Panamint Valley Fault System, Eastern California

Creator:: Choi, Na Hyung
Abstract:: The Eastern California Shear Zone (ECSZ) is a broad zone of dextral shear inboard of the North American - Pacific plate boundary. Despite decades of study, the significance of a mismatch between geodetic velocities and geologic fault slip rates across the ECSZ remains incompletely understood. Geodetically determined interseismic strain across...
Resource Type:: Masters Thesis

Controls on eruption style and magma compositions at Mount Hood, Oregon

Creator:: Koleszar, Alison M.
Abstract:: This study is an effort to characterize the magma sources, plumbing system, and eruptive behavior of Mount Hood, a low-explosivity recharge-dominated volcano in the Oregon Cascades. The three manuscripts in this dissertation make use of melt inclusion data, phenocryst compositions, and whole rock petrology and geochemistry to build a schematic...
Resource Type:: Dissertation

Hydrology and geomorphic evolution of basaltic landscapes, High Cascades, Oregon

Creator:: Jefferson, Anne (Anne Jarvis)
Abstract:: The basaltic landscapes of the Oregon High Cascades form a natural laboratory for examining how geologic setting and history influence groundwater flowpaths, streamflow sensitivity to climate, and landscape evolution. In the High Cascades, highly permeable young basaltic lavas form extensive aquifers. These aquifers are the dominant sources of summer streamflow...
Resource Type:: Dissertation
Full Text:: 15.4°C, respectively. Precipitation on the west slope of the Cascades ranges from 2 to 3.8 m [Taylor

Structure and seismic hazards of the offshore Cascadia forearc and evolution of the Neogene forearc basin

Creator:: McNeill, Lisa C.
Abstract:: The Cascadia subduction zone has been characterized as a typical Chilean-type subduction zone based on qualitative comparisons of plate age and convergence rate, with simple forearc structure. However, the discovery of unusual structural styles of deformation, variations in the morphology of the forearc, and its absence of seismic activity suggest...
Resource Type:: Dissertation

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

Creator:: Bromley, Sarah Ashley
Abstract:: Inheritance from pre-existing mantle domains and fluid and melt contributions from active subduction together produce the geochemical signatures of mantle-derived arc basalts. In this context, this work evaluates the evolution of Cascadia mantle sources by documenting the isotopic and compositional characteristics of primitive basalts along a transect across the Eocene-Oligocene...
Resource Type:: Masters Thesis
Full Text:: , 2001; Urbanczyk, 1994; Walker, 1990; Robinson et al., 1984; Taylor, 1981). Magmatism in the Proto

The "tops" of porphyry copper deposits - mineralization and plutonism in the Western Cascades, Oregon

Creator:: Power, Sara Glen
Resource Type:: Masters Thesis
Full Text:: M. Taylor, and William H. Taubeneck of Oregon State University. A research grant from the Oregon

Basaltic volcanism and tectonics of the High Lava Plains, southeastern Oregon

Creator:: Jordan, Brennan T.
Abstract:: The High Lava Plains province (HLP) of southeastern Oregon is a Miocene to Recent volcanic upland characterized by widespread basaltic volcanism and west-migrating rhyolitic volcanism. New ⁴⁰Ar/³⁹Ar ages for HLP rhyolites demonstrate that the trend of migrating rhyolitic volcanism is robust, reflecting westward migration at a rate of -35 km/m.y....
Resource Type:: Dissertation
Full Text:: Geosciences and the College of Oceanic and Atmospheric Sciences, notably, Ed Taylor, Dave Christie, Roger

ScholarsArchive@OSU

Source, evolution, and eruptive history of the Cold Spring Creek volcanics, Beaverhead County, Montana

Late Cenozoic Climate, Ice-sheet and Earth-surface Evolution Derived from Terrestrial and Marine Sedimentary Archives

The Deschutes Formation: evidence of extension-enhanced explosivity in the early High Cascades

Late Pleistocene Slip Rate along the Panamint Valley Fault System, Eastern California

Controls on eruption style and magma compositions at Mount Hood, Oregon

Hydrology and geomorphic evolution of basaltic landscapes, High Cascades, Oregon

Structure and seismic hazards of the offshore Cascadia forearc and evolution of the Neogene forearc basin

Evolution and inheritance of Cascadia sub-arc mantle reservoirs

The "tops" of porphyry copper deposits - mineralization and plutonism in the Western Cascades, Oregon

Basaltic volcanism and tectonics of the High Lava Plains, southeastern Oregon

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