Index Catalog // ScholarsArchive@OSU

Rhyolitic magmatism of the High Lava Plains and adjacent Northwest Basin and Range, Oregon : implications for the evolution of continental crust

Creator:: Ford, Mark T.
Abstract:: Understanding continental crust formation and modification is a fundamental and longstanding geologic problem. Influx of mantle-derived basaltic magma and partial melting of the crust are two ways to drive crustal differentiation. This process results in a low density upper crust and denser, more refractory lower crust, creating significant and vastly...
Resource Type:: Dissertation

Integration of submersible transect data and high-resolution multibeam sonar imagery for a habitat-based groundfish assessment of Heceta Bank, Oregon

Creator:: Nasby-Lucas, Nicole M., Embley, Bob W., Hixon, Mark A., Merle, Susan G., Tissot, Brian N., and Wright, Dawn J.
Abstract:: In the face of dramatic declines in groundfish populations and a lack of sufficient stock assessment information, a need has arisen for new methods of assessing groundfish populations. We describe the integration of seafloor transect data gathered by a manned submersible with high-resolution sonar imagery to produce a habitat- based...
Resource Type:: Article
Full Text:: Marine Environmental Laboratory, NOAA Hatfi eld Marine Science Center Newport, Oregon 97365 Mark A

Seasonal snowcover dynamics beneath boreal forest canopies

Creator:: Link, Timothy E.
Abstract:: The accurate simulation of snowpack deposition and ablation beneath forested areas is confounded by the fact that the vegetation canopy strongly affects the snow surface energy balance. The canopy alters the radiation balance of the snowcover, and reduces the wind speed at the snow surface. Data collected as part of...
Resource Type:: Masters Thesis
Full Text:: exchange (W m- 2). M heat transfer by advection (W m-2). AQ change in snow cover energy (W m-2). R net

Partitioning of rare earth and high field strength elements between pargasitic amphibole and silicate melts

Creator:: Hilyard, Mark D.
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mark D. Hi lyard for the degree of

Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf

Creator:: Williams, Mark Charles
Abstract:: Since 2003, 39 small earthquakes have been detected offshore central Oregon in the nominally locked part of the Cascadia subduction zone, where very little seis- mic activity has been recorded in spite of a paleo-seismic record of great subduction events. Although the regional earthquake bulletin reports depths of 29 and...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Mark Charles Williams for the

Determining relative benefits to communities from urban and agricultural land use change in Napa County, California

Creator:: Bernard, Mark A.
Abstract:: Urban sprawl and the establishment of greenbelts to separate growing cities and towns has become a popular topic of conversation among land use professionals. Economists focus on urban growth in terms of land rents and have sought market solutions such as transfers and purchases of development rights to slow this...
Resource Type:: Masters Thesis
Full Text:: THESIS OF Mark A. Bernard for the degree of Master of Science in Geography presented on June 12

Magma chamber processes over the past 475,000 years at Mount Hood, Oregon : insights from crystal zoning and crystal size distribution studies

Creator:: Darr, Cristina M.
Abstract:: Several different petrological techniques have been applied to lava flows between 200 to 475,000 years old from Mount Hood, Oregon. Mount Hood is unusual, in comparison to nearby Mount St. Helens and Mount Jefferson, in that it has produced relatively homogeneous lava compositions over 475,000 years. Erupted lavas are mostly...
Resource Type:: Masters Thesis
Full Text:: . Cayley, G = Mt. Girabaldi, B = Mt Baker, GP = Glacier Peak, R = Mt. Rainier, SH = Mt. St. Helens, A = Mt

Surface-subsurface geology of the middle to upper Eocene sedimentary and volcanic rock units, western Columbia County, northwest Oregon

Creator:: Berkman, Thomas Anthony
Abstract:: The middle to upper Eocene Tillamook Volcanics form the basement in the Rock Creek - Rocky Point area. These tholeiitic to alkalic basalts, basaltic andesites, and andesites were erupted as shield volcanoes seaward of the strandline ontop of an older deep-marine mudstone unit (Yamhill Formation) and an accreted portion of...
Resource Type:: Masters Thesis

Geographic Information Systems and rural land use analysis : an evaluation of alternative data sources

Creator:: Mickaelson, Nels E.
Abstract:: A Geographic Information System (GIS) can be a powerful tool for solving land use planning problems. The synthesis, analysis, and depiction of spatial data make it a valuable tool for land use planners. A primary issue with GIS is the cost and time required to develop a functional system. One...
Resource Type:: Capstone Project
Full Text:: Science November, 1997 Directed by Dr. James R. Pease Acknowledgments I would like to extend my

Impacts of instream flows on the Colorado River Delta, Mexico : spatial vegetation change analysis and opportunities for restoration

Creator:: Zamora-Arroyo, Jose Francisco
Abstract:: Until the 1930s, flows of the Colorado River maintained approximately 781,060 hectares of wetlands in its delta. These wetlands provided important feeding and nesting grounds for resident and migratory birds as well as spawning and protection habitat for many fish and other invertebrate species. However, the Delta's wetlands started to...
Resource Type:: Dissertation
Full Text:: for Restoration. Abstract approved: James R. Pease Until the 1930s, flows of the Colorado River

ScholarsArchive@OSU

Rhyolitic magmatism of the High Lava Plains and adjacent Northwest Basin and Range, Oregon : implications for the evolution of continental crust

Integration of submersible transect data and high-resolution multibeam sonar imagery for a habitat-based groundfish assessment of Heceta Bank, Oregon

Seasonal snowcover dynamics beneath boreal forest canopies

Partitioning of rare earth and high field strength elements between pargasitic amphibole and silicate melts

Seismicity at the Cascadia plate boundary beneath the Oregon continental shelf

Determining relative benefits to communities from urban and agricultural land use change in Napa County, California

Magma chamber processes over the past 475,000 years at Mount Hood, Oregon : insights from crystal zoning and crystal size distribution studies

Surface-subsurface geology of the middle to upper Eocene sedimentary and volcanic rock units, western Columbia County, northwest Oregon

Geographic Information Systems and rural land use analysis : an evaluation of alternative data sources

Impacts of instream flows on the Colorado River Delta, Mexico : spatial vegetation change analysis and opportunities for restoration

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