Index Catalog // ScholarsArchive@OSU

Low-pressure phase equilibria of anhydrous anorthite-bearing mafic magmas

Creator:: Kohut, Edward J. and Nielsen, Roger L.
Abstract:: One of the most persistent questions regarding the phase equilibria of mid-ocean ridge basalts (MORB) pertains to the petrogenesis of the anorthitic plagioclase phenocrysts (>An₉₀) that are characteristic of the more primitive members of such suites. Anorthitic phenocrysts are present in many if not most MORB suites in spite of...
Resource Type:: Article
Full Text:: AGU and the Geochemical Society AN ELECTRONIC JOURNAL OF THE EARTH SCIENCES Geochemistry Geophysics

Evolution of sediment accommodation space in steady state bedrock-incising valleys subject to episodic aggradation

Creator:: Lancaster, Stephen T.
Abstract:: Steepland valleys subject to debris flows incise bedrock even as episodic deposition typically covers valley bottoms. This paper’s hypothesis is that, while continual fluvial processes evacuate deposits, storage of episodic deposition drives valley widening and, thereby, creation of accommodation space for sediment storage on the valley floor. Data from three...
Resource Type:: Article
Full Text:: GEOPHYSICAL RESEARCH, VOL. 113, F04002, doi:10.1029/2007JF000938, 2008 1Department of Geosciences, Oregon

Labile dissolved organic carbon supply limits hyporheic denitrification

Creator:: Zarnetske, Jay P., Haggerty, Roy, Wondzell, Steven M., and Baker, Michelle A.
Abstract:: We used an in situ steady state ¹⁵N-labeled nitrate (¹⁵NO₃⁻) and acetate (AcO⁻) well-to-wells injection experiment to determine how the availability of labile dissolved organic carbon (DOC) as AcO⁻ influences microbial denitrification in the hyporheic zone of an upland (third-order) agricultural stream. The experimental wells receiving conservative (Cl⁻ and Br)...
Resource Type:: Article
Full Text:: . Copyright 2011 by the American Geophysical Union. 0148-0227/11/2011JG001730 JOURNAL OF GEOPHYSICAL RESEARCH

A global scale analysis of the spatiotemporal distribution of foliar biomass for 1988

Creator:: Pross, Derek D.
Abstract:: Many ecological systems follow a seasonal cycle affecting primary production,carbon flux, and vegetative gas emissions. The seasonal variation of ecological systems are both affected by and have effects upon climatic factors. A quantitative estimate of the seasonal variation of vegetation is required to characterize ecological systems and their interaction with...
Resource Type:: Masters Thesis
Full Text:: developed. The objective of this research is to develop a methodology that could be used to estimate the

Multidecadal variability of atmospheric methane, 1000–1800 C.E.

Creator:: Mitchell, Logan E., Brook, Edward J., Sowers, Todd, McConnell, J. R., and Taylor, Kendrick
Abstract:: We present a new high-precision, high-resolution record of atmospheric methane from the West Antarctic Ice Sheet (WAIS) Divide ice core covering 1000–1800 C.E., a time period known as the late preindustrial Holocene (LPIH). The results are consistent with previous measurements from the Law Dome ice core, the only other high-resolution...
Resource Type:: Article
Full Text:: . 0148‐0227/11/2010JG001441 JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 116, G02007, doi:10.1029/2010JG001441

Routing of western Canadian Plains runoff during the 8.2 ka cold event

Creator:: Carlson, Anders E., Clark, Peter U., 1956-, Haley, Brian A., and Klinkhammer, Gary P.
Abstract:: The collapse of the Laurentide Ice Sheet over Hudson Bay ∼8.47 ka allowed the rapid drainage of glacial Lake Agassiz into the Labrador Sea, an event identified as causing a reduction in Atlantic meridional overturning circulation (AMOC) and the 8.2 ka cold event. Atmosphere‐ocean models simulations based on this forcing,...
Resource Type:: Article
Full Text:: :10.1029/ 2009GL038778. GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L14704, doi:10.1029/2009GL038778, 2009

Geochronology of age-progressive volcanism of the Oregon High Lava Plains : implications for the plume interpretation of Yellowstone

Creator:: Jordan, Brennan T., Grunder, Anita L., Duncan, Robert A., and Deino, Alan L.
Abstract:: The High Lava Plains province (HLP) is a late Cenozoic bimodal volcanic field at the northern margin of the Basin and Range province in southeastern Oregon that hosts a westward younging trend of silicic volcanism that crudely mirrors northeastward migration of silicic volcanism along the Yellowstone–Snake River Plain (YSRP) trend....
Resource Type:: Article
Full Text:: GEOPHYSICAL RESEARCH, VOL. 109, B10202, doi:10.1029/2003JB002776, 2004 1Now at Department of Geology, College

Dislocation modeling of blind thrusts in the eastern Los Angeles basin, California

Creator:: Myers, Daniel J., Nabelek, John L., and Yeats, Robert S.
Abstract:: The East and West Coyote Hills in the eastern Los Angeles Basin are the surface expression of uplift accompanying blind reverse faulting. Folded Quaternary strata indicate that the hills are growing and that the faults underlying them are active. Detailed subsurface mapping in the East Coyote Oil Field shows that...
Resource Type:: Article
Full Text:: anticlines localize the West Coyote (WC) and East Coyote (EC) oil fields. We use dislocation JOURNAL OF

Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland

Creator:: Suwa, Makoto, von Fischer, Joseph C., Bender, Michael L., Landais, Amaelle, and Brook, Edward J.
Abstract:: We have reconstructed chronology for the disturbed bottom parts of the GRIP and GISP2 ice cores using the combined paleoatmospheric records of CH₄ concentration and δ¹⁸O[subscript atm] in the trapped gases. Our reconstructed ages for basal ice samples are based on comparison of published measurements of CH₄ and δ¹⁸O[subscript atm]...
Resource Type:: Article
Full Text:: ., 1972]. A chronology for the bottom part of the Camp Century ice JOURNAL OF GEOPHYSICAL RESEARCH, VOL

Resazurin as a “smart” tracer for quantifying metabolically active transient storage in stream ecosystems

Creator:: Haggerty, Roy, Martí, Eugénia, Argerich, Alba, von Schiller, Daniel, and Grimm, Nancy B.
Abstract:: We propose the experimental use of resazurin (Raz) and develop a metabolically active transient storage (MATS) model to include processes that may provide additional information on transient storage from a biogeochemical perspective in stream ecosystems. Raz is a phenoxazine compound that reduces irreversibly to resorufin (Rru) in the presence of...
Resource Type:: Article
Full Text:: - dence time than free flowing water, we expect greater JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114, G03014

Gravel disturbance impacts on salmon habitat and stream health : volume II : technical background report

Creator:: Williamson, Kenneth J., Bella, David A., Beschta, Robert L., Grant, Gordon, Klingeman, Peter C., Li, Hiram W., Nelson, Peter O., Castillo, Gonzalo, Lorz, Tom, Meleason, Mark, Minear, Paula, Moret, Stephanie, Nam, Ilgi, Reiter, Maryanne, and Wieland, Lisa
Abstract:: A report for the Oregon Division of State Lands.
Resource Type:: Technical Report
Full Text:: Research Institute Patricia J. Easley, Oregon Water Resources Research Institute The contents of this

Ecosystem Processes and Human Influences Regulate Streamflow Response to Climate Change at Long-Term Ecological Research Sites

Creator:: Jones, Julia A., Creed, Irena F., Hatcher, Kendra L., Warren, Robert J., Adams, Mary Beth, Benson, Melinda H., Boose, Emery, Brown, Warren A., Campbell, John L., Covich, Alan, Clow, David W., Dahm, Clifford N., Elder, Kelly, Ford, Chelcy R., Grimm, Nancy B., Henshaw, Donald L., Larson, Kelli L., Miles, Evan S., Miles, Kathleen M., Sebestyen, Stephen D., Spargo, Adam T., Stone, Asa B., Vose, James M., and Williams, Mark W.
Abstract:: Analyses of long-term records at 35 headwater basins in the United States and Canada indicate that climate change effects on streamflow are not as clear as might be expected, perhaps because of ecosystem processes and human influences. Evapotranspiration was higher than was predicted by temperature in water-surplus ecosystems and lower...
Resource Type:: Article
Full Text:: Department of Agriculture Agricultural Research Service (ARS) established long-term studies in small basins

Testing spatial correlation of subduction interplate coupling and forearc morpho-tectonics

Creator:: Kaye, Grant David
Abstract:: The two largest earthquakes ever recorded, the 1964 M[subscript w] 9.2 Alaskan and 1960 M[subscript w] 9.5 Chilean, occurred on seismogenic plate interfaces at subduction zones. It has been theorized that the catastrophic failure of a locked zone along the contact between the downgoing slab and the upper plate causes...
Resource Type:: Masters Thesis
Full Text:: subductologv is updated in this study through integration of many kinds of geophysical data atop a base of

Late Cenozoic tectonics of the Yubari Fold and Thrust Belt of central Hokkaido and implications for opening of the Sea of Japan

Creator:: Crenna, Paul A.
Resource Type:: Masters Thesis
Full Text:: primary faults are blind, the rate of activity is poorly constrained (Research Group for Active Faults

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:: -geologist audience, with less-technical explanations of the most current research, followed by

A mathematical transformation of multi-angular remote sensing data for the study of vegetation change

Creator:: Friedel, Robert G.
Abstract:: Vegetation change is an important factor affecting the global carbon cycle, land-atmosphere interaction, and terrestrial ecology. The study of vegetation change on a global scale can be used to evaluate the impact of global climate change on terrestrial ecosystems. Satellite remote sensing can monitor vegetation change at the global scale,...
Resource Type:: Masters Thesis
Full Text:: , land-atmosphere interaction, and terrestrial ecology. The study of vegetation change on a global

Multiple mantle plume components involved in the petrogenesis of subduction-related lavas from the northern termination of the Tonga Arc and northern Lau Basin: Evidence from the geochemistry of arc and backarc submarine volcanics

Creator:: Falloon, Trevor J., Danyushevsky, Leonid V., Crawford, Tony J., Maas, Roland, Woodhead, Jon D., Eggins, Stephen M., Bloomer, Sherman H., Wright, Dawn J., Zlobin, Sergei K., and Stacey, Andrew R.
Abstract:: New seafloor mapping and sampling demonstrates that the eruption of the high-Ca boninites is clearly associated with rifting of the northern Tonga ridge and the northern Lau Basin at the northern termination of the Tonga Trench. There is very strong evidence for OIB plume related mantle sources involved in the...
Resource Type:: Article
Full Text:: Deposit Research and School of Earth Sciences, UTas, GPO Box 252-79, Hobart, Tasmania 7001, Australia

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:: : ________________________________________________________________________ Adam J.R. Kent This dissertation combines volcanological research of three convergent

Mapping vegetation using landsat TM and ETM+ in Eritrea

Creator:: Iyob, Biniam
Abstract:: The objective of this study was to examine vegetation and vegetation change in Eritrea over a period from the mid 1980s to 2002 using satellite remote sensing, and relate observed changes to the recent history of drought and war in the region. Specific objectives were (1) to examine vegetation change...
Resource Type:: Masters Thesis
Full Text:: Microsoft Word - mapvegeritreafinal.doc AN ABSTRACT OF

Lava Flow Lobation and Margin Analysis

Creator:: Peckyno, Robert S.
Abstract:: Comparative investigations based on volcanic morphology suffer from the lack of a large terrestrial baseline for comparison. To fill this gap, the Lava Flow Morphology Database (LAMDA) was proposed as a GIS based central clearinghouse for remote and field investigations of volcanic morphology. This study presents an analysis of LAMDA’S...
Resource Type:: Capstone Project
Full Text:: AN ABSTRACT OF THE RESEARCH PROJECT OF Robert Peckyno for

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