Index Catalog // ScholarsArchive@OSU

Volcanology and petrology of the Rattlesnake Ash-Flow Tuff, eastern Oregon

Creator:: Streck, Martin J.
Abstract:: The Rattlesnake Ash-Flow Tuff erupted 7.05±0.01 Ma from the western Harney Basin, southeastern Oregon. The location of the vent area is inferred based on vent-ward increases in size of pumices, in degree of welding, and in degree of post-emplacement crystallization. Today's outcrops cover 9000 km2 and estimated original outcrop coverage...
Resource Type:: Dissertation
Full Text:: , Roger Nielsen, and John Dilles, are much appreciated. Among many people who contributed with

The Role of Submesoscale Features in Transporting Heat and Salt Across Ocean Fronts

Creator:: Sanchez-Rios, Alejandra
Abstract:: The focus of this dissertation is the analysis of submesoscale and finescale features measured at oceanic fronts and the role they play in the transport of heat and salt. Two different geographical areas were used to analyze this transport: one, an area on the western side of the North Atlantic...
Resource Type:: Dissertation
Full Text:: to thank my committee members: Jack Barth, Emily Shroyer, Roger Samel- son, and my Graduate Council

The origin of mid-ocean ridge basalts : insights from trace element contents in anorthite, anorthite-hosted melt inclusions, and ocean core complexes

Creator:: Weinsteiger, Allison B.
Abstract:: The primary goal of this study is to access the processes that alter primary melts after segregation from a mantle source and ultimately form petrologic Layers 2 and 3 of the Ocean Crust. Mineral, melt inclusion, and whole rock chemical compositions are utilized to further the understanding of 1) the...
Resource Type:: Dissertation
Full Text:: : ________________________________________________________________________ Adam J.R. Kent Roger L. Nielsen The primary goal of this study is to access

Stable isotope investigation of a hydrothermal alteration system : Butte porphyry copper deposit

Creator:: Zhang, Lihua, 1965-
Abstract:: Typical porphyry-type Cu-Mo mineralization predates and underlies the well-known Main Stage polymetallic veins of the Butte district, Montana. This thesis presents the first systematic study of the isotopic characteristics of the pre-Main Stage K-silicate and sericitic wallrock alteration related to the porphyry Cu-Mo stage. Oxygen and hydrogen isotopic compositions were...
Resource Type:: Dissertation

Spatial and temporal scales of genetic change in two overfished rockfishes

Creator:: Gomez-Uchida, Daniel
Abstract:: Pacific rockfishes (genus Sebastes) have attracted wide scientific and public interest from an evolutionary, fishery and conservation standpoints. This dissertation addresses several hypotheses involving spatial and temporal scales of genetic change in two overfished rockfishes, darkblotched (S. crameri) and canary rockfish (S. pinniger), using statistical analyses of genetic variation within...
Resource Type:: Dissertation
Full Text:: and accomplish them. I am indebted to Jennifer L. Nielsen, Ian A. Fleming, George W. Boehlert and

Roles of gas and solid components in the direct nitridation of silicon

Creator:: Pavarajarn, Varong
Abstract:: The factors influencing the direct nitridation of silicon, including the effects of the native oxide layer covering the surface of silicon, the effects of hydrogen contained in the nitridation gas and the catalytic effects of metals added to the raw material silicon, were investigated, using a tubular flow reactor and...
Resource Type:: Dissertation
Full Text:: . Keith Levien, Dr. Roger Nielsen and Dr. Brian Wood for their valuable time and suggestions. I would

Response of grain yield, plant height and kernel weight in three winter wheat crosses (Triticum aestivum, L. em Thell) to different methods of selection

Creator:: Salmeron-Zamora, Jose Juan
Abstract:: This study was undertaken to see if a method of handling segregating populations could be employed which combined the positive attributes of the traditional pedigree and-bulk methods. Derived F₅ lines from the pedigree, bulk, and what is identified as a modified bulk method, were obtained from three winter wheat crosses....
Resource Type:: Dissertation
Full Text:: L. Jackson, Roger G. Petersen and Virgil H. Freed members of my commitee for their time and

Phase diagram, thermal stability, and high temperature oxidation of the ternary Cu-Ni-Fe system

Creator:: Gallino, Isabella
Abstract:: Due to the aluminum industry demands, a large effort has recently been devoted to the development of special alloys to be used as inert anodes for a newly designed aluminum reduction cell. The implementation of this new technology aims at the replacement of the graphite anodes that have been used...
Resource Type:: Dissertation
Full Text:: the thermodynamic calculations with Thermocal, to Dr. Roger Nielsen for the microprobe analyses, to

Petrology of the reversely zoned Mickey Pass Tuff, west-central Nevada

Creator:: Templeton, Jeffrey H.
Resource Type:: Dissertation
Full Text:: me pinpoint several key localities in the northern Gillis Range. Roger Nielsen provided his

Origins and evolution of plant microRNA genes

Creator:: Fahlgren, Noah
Abstract:: Eukaryotic small RNA (~20-30 nucleotides) are diverse regulatory molecules that repress gene expression at the transcriptional and post-transcriptional levels, defend hosts against invading viruses and defend genomes against selfish DNA elements. Small RNA populations are studied by high-throughput sequencing of the total small RNA fraction isolated from cells, however, the...
Resource Type:: Dissertation
Full Text:: , Sarah R. Grant and Jeffery L. Dangl generated and sequenced small RNA libraries for an analysis

ScholarsArchive@OSU

Volcanology and petrology of the Rattlesnake Ash-Flow Tuff, eastern Oregon

The Role of Submesoscale Features in Transporting Heat and Salt Across Ocean Fronts

The origin of mid-ocean ridge basalts : insights from trace element contents in anorthite, anorthite-hosted melt inclusions, and ocean core complexes

Stable isotope investigation of a hydrothermal alteration system : Butte porphyry copper deposit

Spatial and temporal scales of genetic change in two overfished rockfishes

Roles of gas and solid components in the direct nitridation of silicon

Response of grain yield, plant height and kernel weight in three winter wheat crosses (Triticum aestivum, L. em Thell) to different methods of selection

Phase diagram, thermal stability, and high temperature oxidation of the ternary Cu-Ni-Fe system

Petrology of the reversely zoned Mickey Pass Tuff, west-central Nevada

Origins and evolution of plant microRNA genes

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