Index Catalog // ScholarsArchive@OSU

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:: Deschutes Formation: Evidence of Extension-Enhanced Explosivity in the Early High Cascades

Extension and volcanism : tectonic development of the northwestern margin of the Basin and Range Province in southern Oregon

Creator:: Scarberry, Kaleb C.
Abstract:: The northwestern corner of the Basin and Range Province (NWBR) lies in southeast Oregon where extensive Late Miocene, mafic to bimodal basalt-rhyolite volcanism and extensional faults dominate a stark and arid landscape. Near Lake Abert, the Late Miocene volcanic section abuts Early Miocene, dominantly intermediate composition volcanoes at the Coleman...
Resource Type:: Dissertation
Full Text:: formation of NW-striking fault systems. Extension and Volcanism: Tectonic Development of the

Evolution of jasperoid and hydrothermal alteration at Veteran Extension in the Robinson (Ely) porphyry copper district, Nevada

Creator:: Maher, David J., (David Joseph), 1969-
Resource Type:: Masters Thesis
Full Text:: Extension in the Robinson (Ely) porphyry copper district, Nevada AN ABSTRACT OF THE THESIS OF David J

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
Full Text:: shelf and upper slope are characterized by extension in the form of listric normal faults. These faults

Alkaline and peraluminous intrusives in the Clarno Formation around Mitchell, Oregon : ramifications on magma genesis and subduction tectonics

Creator:: Appel, Michael
Abstract:: The Clarno Formation is a series of volcanic, volcaniclastic, and related intrusive rocks located in central Oregon. It is the westernmost extent of a broader Eocene magmatic belt that covers much the western United States. The magmatic belt stretches eastward from Oregon to western South Dakota, and from the Canadian...
Resource Type:: Masters Thesis
Full Text:: involving extension was in place during the early Cenozoic. In the vicinity of Mitchell, Oregon, the Clarno

The termination of the Basin and Range Province into a clockwise rotating region of transtension and volcanism, central Oregon

Creator:: Trench, David
Abstract:: Normal faults characterizing extensional provinces may terminate along-strike at regions of zero extension, at zones of transform faults, or at triple junctions. Termination of the Basin and Range extensional province in southeastern Oregon is thought to occur by right-lateral transform motion distributed across the Brothers Fault zone (BFZ) in central...
Resource Type:: Masters Thesis
Full Text:: zero extension, at zones of transform faults, or at triple junctions. Termination of the Basin and

Early Oligocene intrusions in the central Coast Range of Oregon : petrography, geochemistry, geochronology and implications for the Tertiary magmatic evolution of the Cascadia forearc

Creator:: Oxford, Jeremiah
Abstract:: The Early Oligocene Oregon Coast Range Intrusions (OCRI) consist of gabbroic rocks and lesser alkalic intrusive bodies that were emplaced in marine sedimentary units and volcanic sequences within a Tertiary Cascadia forearc basin. The alkalic intrusions include nepheline syenite, camptonite, and alkaline basalt. The gabbros occur as dikes and differentiated...
Resource Type:: Masters Thesis
Full Text:: America continental margin. Dextral shear and extension along the continental margin may have been a

Understanding large resurgent calderas and associated magma systems : the Pastos Grandes Caldera Complex, southwest Bolivia

Creator:: Kaiser, Jason Frederick, 1985-
Abstract:: The Pastos Grandes Caldera Complex (PGCC) in southwest Bolivia has produced two large-volume (≥800 km³ DRE) dacite ignimbrites from a nested caldera source over a period of 5.5 Myr. In addition to the large-volume ignimbrites, a small-volume ignimbrite shield and post-climactic lavas define this composite system. Based on detailed field...
Resource Type:: Dissertation
Full Text:: America. Geological Society of America Bulletin, 70, 671. Chmielowski, J., Zandt, G., & Haberland, C

Interpreting a weird and scenic landscape to park visitors : tectonic and volcanic processes of Craters of the Moon National Monument and Preserve, Idaho

Creator:: Truitt, Kimberly E.
Abstract:: This thesis develops a geology training manual for the Interpretation staff of Craters of the Moon National Monument and Preserve (CRMO) in southern Idaho. The manual will help the staff convey geologic principles to park visitors who are experiencing a landscape formed by volcanic processes. Basic geology and the most...
Resource Type:: Masters Thesis
Full Text:: giving the interpretive staff a clearer picture of the similarity of Basin and Range extension to the

Convergent margin magmatism in the central Andes and its near antipodes in western Indonesia : spatiotemporal and geochemical considerations

Creator:: Salisbury, Morgan J.
Abstract:: This dissertation combines volcanological research of three convergent continental margins. Chapters 1 and 5 are general introductions and conclusions, respectively. Chapter 2 examines the spatiotemporal development of the Altiplano-Puna volcanic complex in the Lípez region of southwest Bolivia, a locus of a major Neogene ignimbrite flare- up, yet the least...
Resource Type:: Dissertation
Full Text:: Bulletin 3300 Penrose Place, Boulder, Colorado, USA Volume 123, p. 821-840. 6 2.1 Abstract The

ScholarsArchive@OSU

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

Extension and volcanism : tectonic development of the northwestern margin of the Basin and Range Province in southern Oregon

Evolution of jasperoid and hydrothermal alteration at Veteran Extension in the Robinson (Ely) porphyry copper district, Nevada

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

Alkaline and peraluminous intrusives in the Clarno Formation around Mitchell, Oregon : ramifications on magma genesis and subduction tectonics

The termination of the Basin and Range Province into a clockwise rotating region of transtension and volcanism, central Oregon

Early Oligocene intrusions in the central Coast Range of Oregon : petrography, geochemistry, geochronology and implications for the Tertiary magmatic evolution of the Cascadia forearc

Understanding large resurgent calderas and associated magma systems : the Pastos Grandes Caldera Complex, southwest Bolivia

Interpreting a weird and scenic landscape to park visitors : tectonic and volcanic processes of Craters of the Moon National Monument and Preserve, Idaho

Convergent margin magmatism in the central Andes and its near antipodes in western Indonesia : spatiotemporal and geochemical considerations

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