Index Catalog // ScholarsArchive@OSU

New ⁴⁰Ar/³⁹Ar age progression for the Louisville hot spot trail and implications for inter–hot spot motion

Creator:: Koppers, Anthony A. P., Gowen, Molly D., Colwell, Lauren E., Gee, Jeffrey S., Lonsdale, Peter F., Mahoney, John J., and Duncan, Robert A.
Abstract:: In this study we present 42 new ⁴⁰Ar/³⁹Ar incremental heating age determinations updated age progression for the Louisville seamount trail. Louisville is the South Hawaiian‐Emperor seamount trail, both trails representing intraplate volcanism (~80 Ma to present) and being examples of primary hot spot lineaments. Our age‐progressive trend from 71 to...
Resource Type:: Article
Full Text:: . Colwell, J. S. Gee, P. F. Lonsdale, J. J. Mahoney, and R. A. Duncan (2011), New 40Ar/39Ar age progression

On the Volcanic and Geodynamic Evolution of the Shatsky Rise and the Louisville Seamount

Creator:: Heaton, Daniel E.
Abstract:: Large igneous provinces (LIPs) and intraplate seamounts reflect of anomalous mantle melting and illuminate interior processes of the Earth. These features are in all ocean basins and show the mantle’s evolution over time, then can provide information on plate tectonic processes, such as plate motion over time, spreading ridge formation,...
Resource Type:: Dissertation
Full Text:: Anthony A. P. Koppers Large igneous provinces (LIPs) and intraplate seamounts reflect of anomalous

An Evaluation of the Complex Age Progression along the Cook-Austral Islands Using High-resolution ⁴⁰Ar/³⁹Ar Incremental Heating Ages

Creator:: Rose, Joanna
Abstract:: The Cook-Austral island chain has been the center of debate for many years. Contrary to the classical hotspot hypothesis, this volcanic island chain does not exhibit a linear age progression with a single node of active volcanism, but instead shows evidence of young volcanism at several points along the chain....
Resource Type:: Masters Thesis
Full Text:: : _____________________________________________________________________ Anthony A. P. Koppers The Cook-Austral island chain has been the center of debate for

Steady-State Diffusion in a Spatially Varying Porous Medium

Creator:: Ferrero, Peter T.
Abstract:: Heterogeneous porous material represents a persistent challenge in the field of engineering. Microscale properties such as the porosity and microchannel torturosity significantly control the macroscale transport characteristics of homogeneous porous medium. Additional complexity is introduced when these small-scale features vary in space. Examples of heterogeneous porous systems include artificial body...
Resource Type:: Masters Thesis

Non-native and native plant species distributions and variability along an elevation gradient in the Wallowa Mountains, Oregon

Creator:: Averett, Joshua P.
Abstract:: Invasion by non-native plants into natural areas is an important component of global change that threatens biodiversity and ecosystem structure and function. Mountains are currently among the least invaded ecosystems, however, these biodiversity hotspots are increasingly under threat of exotic plant invasion. Evaluation of plant species distribution patterns in mountain...
Resource Type:: Masters Thesis
Full Text:: OF Joshua P. Averett for the degree of Master of Science in Rangeland Science presented on June

New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

Creator:: Konrad, Kevin
Abstract:: Earth’s mantle extends to nearly 3000 km depth, comprises >80 % of Earth’s total volume, and has the largest influence on the primordial and radiogenic heat budget. Despite its importance, the structure and composition of the mantle is still debated. There are three primary models for Earth’s mantle structure that...
Resource Type:: Dissertation
Full Text:: reproduced the observed relative motions. 1.5 References Allègre, C. J., Staudacher, T., Sarda, P

Seamount subduction and earthquakes

Creator:: Watts, Anthony B., Koppers, Anthony A. P., and Robinson, David P.
Abstract:: Seamounts are ubiquitous features of the seafloor that form part of the fabric of oceanic crust. When a seamount enters a subduction zone, it has a major affect on forearc morphology, the uplift history of the island arc, and the structure of the downgoing slab. It is not known, however,...
Resource Type:: Article
Full Text:: . Lonsdale, P. 1986. A multibeam reconnaissance of the Tonga trench axis and its intersection with the

Application of Cosmogenic Nuclides and Argon Geochronology to Paleoclimate, Paleomagnetism, and Paleohydrology

Creator:: Balbas, Andrea M.
Abstract:: This dissertation uses argon geochronology and cosmogenic nuclide surface exposure dating methods to address three research questions. The first question concerns a geomagnetic instability recorded in lava flows on the island of Floreana in the Galapagos Archipelago. Changes in the Earth’s magnetic field (intensity and orientation) occur frequently throughout geologic...
Resource Type:: Dissertation
Full Text:: . CONTIRBUTION OF AUTHORS Chapter 2—Anthony A. P. Koppers and Dennis V. Kent oversaw measurement campaigns

Geochemical evidence in the northeast Lau Basin for subduction of the Cook-Austral volcanic chain in the Tonga Trench

Creator:: Price, Allison A., Jackson, Matthew G., Blichert-Toft, Janne, Blusztajn, Jerzy, Conatser, Christopher S., Konter, Jasper G., Koppers, Anthony A. P., and Kurz, Mark D.
Abstract:: Lau Basin basalts host an array of geochemical signatures that suggest incorporation of enriched mantle source material often associated with intraplate hotspots, but the origin of these signatures remain uncertain. Geochemical signatures associated with mantle material entrained from the nearby Samoan hotspot are present in northwest Lau Basin lavas, and...
Resource Type:: Article
Full Text:: K 2 O (w t. % ) X R F 0. 90 - 0. 99 0. 78 0. 39 1. 95 2. 07 2. 00 1. 84 1. 53 - 0. 51 P

Meta-Analysis of Physical Activity Levels in Youth With and Without Disabilities

Creator:: Jung, Jaehun, Leung, Willie, Schram, Bridgette Marie, and Yun, Joonkoo
Abstract:: The purpose of this study was to explore the current levels of physical activity among youth with disabilities using meta-analysis. The search identified 11 publications including 729 participants (age 4-20 yr). The overall effect size for 11 studies was Hedges g = 0.60 (SE = 0.18, 95% confidence interval [CI]...
Resource Type:: Article
Full Text:: was Hedges g = 0.60 (SE = 0.18, 95% confidence interval [CI] [0.24, 0.96], p < .05, k = 11) using a

ScholarsArchive@OSU

New ⁴⁰Ar/³⁹Ar age progression for the Louisville hot spot trail and implications for inter–hot spot motion

On the Volcanic and Geodynamic Evolution of the Shatsky Rise and the Louisville Seamount

An Evaluation of the Complex Age Progression along the Cook-Austral Islands Using High-resolution ⁴⁰Ar/³⁹Ar Incremental Heating Ages

Steady-State Diffusion in a Spatially Varying Porous Medium

Non-native and native plant species distributions and variability along an elevation gradient in the Wallowa Mountains, Oregon

New Insights into Mantle Dynamics from Helium Isotopes and Argon Geochronology

Seamount subduction and earthquakes

Application of Cosmogenic Nuclides and Argon Geochronology to Paleoclimate, Paleomagnetism, and Paleohydrology

Geochemical evidence in the northeast Lau Basin for subduction of the Cook-Austral volcanic chain in the Tonga Trench

Meta-Analysis of Physical Activity Levels in Youth With and Without Disabilities

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