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Filtering by: Academic Affiliation Geosciences Remove constraint Academic Affiliation: Geosciences Decade 1990-1999 Remove constraint Decade: 1990-1999 Degree Name Master of Science (M.S.) Remove constraint Degree Name: Master of Science (M.S.) Language English [eng] Remove constraint Language: English [eng] Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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A spatial model for studying population dynamics of the California Mojave Desert tortoise

Creator:

Nguyen, Linh Thu

Abstract:

A spatially explicit population model written in C++ programming language is used in this study examining the population dynamics of the Desert Tortoise (Gopherus agassizii) in the California Mojave Desert. The model is constructed with hexagonal divisions of space, and with one-year increments of time. Four thematic maps: vegetation, soil...

Resource Type:

Masters Thesis
Distribution patterns of reptiles and amphibians in Puerto Rico

Creator:

Le, Minh Duc, 1973-

Abstract:

This study examined the question of whether a big island can be divided into many smaller islands with the same pattern of area-species curve as that of the complete island. To address this question, this study used data on the number and distribution of amphibians and reptiles on Puerto Rico...

Resource Type:

Masters Thesis
Comparing intercell distance and cell wall midpoint criteria for discrete global grid systems

Creator:

Gregory, Matthew Jay

Abstract:

Many diverse applications have begun to study processes and patterns at a global scale. To aid in this research, discrete global grid systems (DGGSs) are data models which enable environmental modeling, monitoring and sampling across the earth at a variety of spatial scales. A DGGS can be evaluated on a...

Resource Type:

Masters Thesis
The conceptual development and use of ecoregion classifications

Creator:

Brewer, Isaac

Abstract:

This thesis explores the genesis of the ecoregion concept, examines the conceptual development of ecoregion classification systems, investigates applications of ecoregion classification systems for a broad range of purposes, and discusses the prospects for the further evolution of this concept. An ecoregion is an area that exhibits patterns of homogeneity...

Resource Type:

Masters Thesis
Spatial distribution of understory vegetation in tree canopy gaps of the Pacific Northwest

Creator:

London, Sharon Gail

Abstract:

Understory vegetation in artificially created tree canopy gaps in the Pacific Northwest was studied to determine 1) variation in understory vegetation cover between gap edges and gap centers, as well as between control and treatment plots, 2) spatial patterns of biomass and difference in biomass patterns among plots, 3) individual...

Resource Type:

Masters Thesis
Using a single-well push-pull test to estimate mass transfer rate parameters

Creator:

Kelley, Michael John

Abstract:

More efficient methods are needed for the in-situ evaluation of mass transfer parameters which describe the movement of solutes through aquifer material. The objective of this study was to develop a method for estimating diffusion rate and capacity coefficients using a single-well, "push-pull" tracer test. The method consists of the...

Resource Type:

Masters Thesis
Single and multiple rates of nonequilibrium diffusive mass transfer at the laboratory, field, and regional scales in the Culebra Member of the Rustler Formation, New Mexico

Creator:

Fleming, Sean W.

Resource Type:

Masters Thesis
Geology and paleoseismology of the Trans-Yamuna active fault system, Himalayan foothills of northwest India

Creator:

Oatney, Emily M.

Abstract:

Satellite image interpretation, geologic mapping, and paleoseismic trenching are used to investigate the Trans-Yamuna active fault system in the northwestern Doon Valley of the Indian Himalayan foothills. This east-west fault system is subparallel to and crosses the Main Boundary thrust near the structural transition from the Nahan salient to the...

Resource Type:

Masters Thesis
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
Hydrothermal alteration of a supra-subduction zone ophiolite analog, Tonga, Southwest Pacific

Creator:

Kelman, Melanie C.

Abstract:

The basement of the Tonga intraoceanic forearc comprises Eocene arc volcanic crust formed during the earliest phases of subduction. Volcanic rocks recovered from the forearc include boninites and arc tholeiites, apparently erupted into and upon older mid-oceanic ridge tholeiites. Rock assemblages suggest that the forearc basement is a likely analog...

Resource Type:

Masters Thesis
Airborne videography as a classification and validation technique for Landsat TM-based vegetation mapping

Creator:

Barrett, Charley, 1965-

Abstract:

The Oregon Department of Fish and Wildlife's (ODFW) Ecological Analysis Center (EAC) is in the process of creating, from Landsat Thematic Mapper (TM) imagery, a vegetation map of Oregon that will meet the latest standards set by the National Gap Analysis Program. Since field verification is often expensive and by...

Resource Type:

Masters Thesis
Lithofacies, stratiography, and geology of the middle eocene type cowlitz formation and associated volcanic and sedimentary units, Eastern Willapa Hills, southwest Washington

Creator:

Payne, Charles William

Abstract:

Stratigraphic measurement of the 1,238-rn thick Cowlitz Formation in the southwest Washington type section along Olequa and Stillwater creeks reveals complex facies succession of wave- to tide-dominated deltaic sequences. The underlying, 625-rn thick upper member of the McIntosh Formation (as mapped by Wells, 1981) is composed of two units: a...

Resource Type:

Masters Thesis
Subsurface structural evolution along the northern Whittier fault zone of the eastern Los Angeles basin, Southern California

Creator:

Herzog, David W.

Abstract:

The Whittier fault forms the central part of a fault system extending from the East Montebello fault at Whittier Narrows to the Elsinore fault, which is traced as far as the Mexican border. The Whittier fault forms a restraining bend in this fault system, resulting in uplift of the Puente...

Resource Type:

Masters Thesis
Small circle subdivision method for development of global sampling grid

Creator:

Song, Lian

Abstract:

Modern environmental monitoring and modeling requires a good global grid system for survey sampling and accurate, spatially complete data collection of relevant environmental phenomena. A prime requirement for the global grid system is that the global sampling grids be regular and equal in area and have minimal shape distortion. None...

Resource Type:

Masters Thesis
An assessment of a Stream Reach Inventory and Channel Stability Evaluation : predicting and detecting flood-induced change in channel stability

Creator:

Morét, Stephanie L.

Abstract:

Pre-flood (1995), and post-flood (1996) channel stability surveys were conducted on 22 reaches along Oak Creek, Benton County, Oregon in an effort to note if the flood of February 1996 altered the channel and if the channel stability survey that was being used accurately predicted the channels resistance to change...

Resource Type:

Masters Thesis
The effects of hillslope and fluvial processes on particle size of the stream bed at the watershed, reach and within-reach scales in a fifth-order mountain stream

Creator:

Lambert, Beth C.

Abstract:

This study addressed the effects of hilislope and fiuvial processes on spatial patterns of stream bed particle size at the watershed, reach and within-reach scales. The study was conducted in Lookout Creek watershed, a fifth-order, 64 km2 basin in the Western Cascades mountains of Oregon. Stream bed particle size was...

Resource Type:

Masters Thesis
Crustal structure of the Queen Charlotte Transform Fault Zone from multichannel seismic reflection and gravity data

Creator:

Scheidhauer, Maren

Abstract:

The Queen Charlotte Fault system is a segment of the North America - Pacific plate boundary. From 45 Ma - 5 Ma, plate motion has been primarily translational. Since 5 Ma, transpression has been the dominant mode of interaction. The plate boundary west of the Queen Charlotte Islands is characterized...

Resource Type:

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

Creator:

Hilyard, Mark D.

Resource Type:

Masters Thesis
Sediment provenance and transport on the Siberian Arctic shelf

Creator:

Mammone, Kerry Anne

Resource Type:

Masters Thesis
Entrainment, transport, and deposition of large woody debris in streams : results from a series of flume experiments

Creator:

Braudrick, Christian A.

Abstract:

Although there has been extensive research on the geomorphic and ecologic role of large woody debris (LWD) in streams, the dynamics of LWD in streams are poorly known due to various measurement difficulties during floods. In this thesis I present the results of two flume experiments on the dynamics of...

Resource Type:

Masters Thesis
Surface-subsurface facies and distribution of the Eocene Cowlitz and Hamlet formations, northwest Oregon

Creator:

Robertson, Christina Lynn

Abstract:

Since 1979, over $114 million of natural gas has been produced at the Mist Gas Field, currently the only commercial gas field in the Pacific Northwest. In the Mist Gas Field, the sandstone-dominated Clark and Wilson member of the upper Eocene Cowlitz Formation is the reservoir and the overlying upper...

Resource Type:

Masters Thesis
Spatial and temporal trends in bed material and channel morphology below a hydroelectric dam complex, Deschutes River, Oregon

Creator:

McClure, Ellen M.

Abstract:

River regulation imposes changes in the supply of sediment and the frequency of competent flows. As a result, impounded rivers often exhibit downstream changes in channel processes, particle size, and morphology. The magnitude of change in competent flow frequency and sediment load together can be used to predict the pattern...

Resource Type:

Masters Thesis
The 1993, Scott Mills aftershock sequence : moment tensor inversion and joint hypocenter determination

Creator:

Schurr, Bernd D.

Resource Type:

Masters Thesis
Bulldozer blades and colliding submarine mountain chains : constraints on central Oregon convergent margin tectonics from magnetics and gravity

Creator:

Fleming, Sean W.

Abstract:

Magnetic and gravity modelling was completed along two E-W transects offshore central Oregon. These models indicate that the backstop-forming western edge of the Siletz terrane has a seaward dip of approximately 40° to 49° at 44°48'N, shallowing to ~28° at 44°1 1 'N. This is a well-determined result, given available...

Resource Type:

Masters Thesis
Morphometric analysis of landslides and slope stability on the north shore of the John Day Reservoir, Columbia River, Oregon and Washington

Creator:

Woelke, Franziska

Abstract:

The John Day Reservoir, a large reservoir between the John Day and the McNary Dams on the Columbia River, must be lowered several feet below design level during salmon migration season in order to preserve anadromous fish habitat. This research assessed the north shore of the John Day Reservoir for...

Resource Type:

Masters Thesis
Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Creator:

Lendl, Christof

Abstract:

This thesis presents elastic finite difference simulations of two dimensional wavefield propagation for line-9, recorded during the 1993 part of the multi-institutional, multi-year Mendocino Triple Junction (MTJ) Seismic Experiment. Line-9 is a high-resolution, large-aperture seismic profile oriented in north-south direction, extending from the subduction regime north of the MTJ to...

Resource Type:

Masters Thesis
Structure and shortening of the Kangra and Dehra Dun reentrants, Sub-Himalaya, India

Creator:

Powers, Peter M.

Abstract:

Surface-geology, oil-well, seismic-reflection, and magnetostratigraphic data are integrated to evaluate structural style and shortening rate at the Himalayan front (Sub-Himalaya) of northwest India. The Sub-Himalaya, between the Main Boundary thrust and the Himalayan Frontal fault, is the actively deforming front of the Himalaya. At certain locations, the Himalayan Frontal fault...

Resource Type:

Masters Thesis
Lower and Middle Devonian carbonate-platform and outer-shelf-basin deposits flanking Railroad Valley, Nevada

Creator:

Nelson, Storr L.

Abstract:

Lower and Middle Devonian strata crop out on the former stable carbonate platform that existed in the Quinn Canyon Range, through the carbonate shelf edge in the Pancake Range, to the carbonate slope and outer-shelf basin in the Reveille Range. The strata of the Reveille Range record a transition from...

Resource Type:

Masters Thesis
Geology, structure, and tectonic history of the Tualatin Basin, northwestern Oregon

Creator:

Popowski, Thomas Allan

Abstract:

The northwest-trending Neogene Tualatin basin in northwestern Oregon is a pull-apart basin with approximately 750 m of post-middle Miocene structural relief. Gently tilted uplands capped by Columbia River Basalt Group surround the synclinal basin on all sides. Integrated gravity, aeromagnetic, and seismic reflection data indicated that the basin is underlain...

Resource Type:

Masters Thesis
Habitat quality and assessing risks to avian biodiversity

Creator:

Barczak, Mary J.

Abstract:

Models that assess the risk to biodiversity from landscape change can help communities prioritize planning decisions. Accurate representation of the ecology and life history traits of species is necessary. This study introduces the use of habitat quality in a biodiversity risk model to determine the significance of habitat quality when...

Resource Type:

Masters Thesis
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
Geologic evolution of the Duck Creek Butte eruptive center, High Lava Plains, southeastern Oregon

Creator:

Johnson, Jenda A.

Resource Type:

Masters Thesis
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
Shear-wave anisotrophy across the Cascadia Subduction Zone from a linear seismograph array

Creator:

Fabritius, R. Axel

Resource Type:

Masters Thesis
Modeling the Laurentide Ice Sheet through the last deglaciation

Creator:

Licciardi, Joseph M.

Resource Type:

Masters Thesis
Ecological survey and interpretation of the Willamette Floodplain Research Natural Area, W.L. Finley National Wildlife Refuge, Oregon

Creator:

Streatfeild, Rosemary Welch

Abstract:

The purpose of this study was to: (1) evaluate land use and vegetation history of the Willamette Floodplain Research Natural Area; (2) characterize present day vegetation; (3) evaluate the relation of vegetation to environment, and (4) establish a baseline dataset for future trend analysis in order that response of different...

Resource Type:

Masters Thesis
Changes in mass of Collier Glacier, Oregon, 1910-1994

Creator:

McDonald, Gregory D. (Gregory Douglas), 1962-

Abstract:

A change to a warmer, drier climate beginning as early as 1900 was responsible for triggering a dramatic, rapid retreat of Collier Glacier, Oregon, between 1924 and 1940. Although there was a dramatic decrease in precipitation contemporaneous with this observed "step-function" response of mass loss, it is unclear if climate...

Resource Type:

Masters Thesis
Emerald mineralization and amphibolite wall-rock alteration at the Khaltaro pegmatite-hydrothermal vein system, Haramosh Mountains, Northern Pakistan

Creator:

Laurs, Brendan M.

Resource Type:

Masters Thesis
Late Devonian (Famennian) brachiopods of the West Range Limestone and the Pilot Shale of Eastern Nevada

Creator:

Mayer, Paul S.

Resource Type:

Masters Thesis
Three-dimensional gravity analysis of the Pacific-Antarctic east Pacific rise at 36.5°S, 49.8°S and 54.2°S

Creator:

Enriquez, Kelly D.

Abstract:

Three-dimensional gravity analysis is the process of removing the predictable components from the free-air gravity anomalies and has proven to be useful for interpreting the subsurface structures and active processes at mid-ocean ridges. The three-dimensional effects of the seafloor and Moho topography, assuming a constant crustal thickness and constant crust...

Resource Type:

Masters Thesis
Sediment production and delivery in Pistol River, Oregon and its effects on pool morphology

Creator:

Russell, Periann

Abstract:

Sediment production and delivery in Pacific Northwest coastal streams can have damaging effects on channel morphology and anadromous fish habitat. The research in Pistol River was designed to determine if a link exists between sediment delivery processes and degradation of fish habitat. Objectives of this basin-wide analysis were to: 1)...

Resource Type:

Masters Thesis
Geology, hydrothermal alteration, and geographic information system analysis of the Zortman Mine area, Montana

Creator:

Wampler, Peter J.

Resource Type:

Masters Thesis
Epithermal gold mineralization related to caldera volcanism at the Atlanta district, east-central Nevada

Creator:

LaBerge, Rene D.

Resource Type:

Masters Thesis
Pre-pliocene structural geology and structural evolution of the northern Los Angeles Basin, southern California

Creator:

Schneider, Craig L.

Abstract:

Detailed subsurface structure contour maps and cross sections have shown the northern Los Angeles basin to be underlain by a south facing monocline that is complicated by secondary faults and folds. The monocline forms a structural shelf that marks the northern boundary of the Los Angeles central trough. The monocline...

Resource Type:

Masters Thesis
Subsurface Quaternary and Pliocene structures of the northern Los Angeles Basin, California

Creator:

Hummon, Cheryl

Abstract:

The northern Los Angeles basin is influenced by two structural styles: the west-trending compressional Transverse Ranges to the north, and the strike-slip Peninsular Ranges to the south. The interaction of these two structural styles has resulted in a complex fold fault belt at the northern margin of the Los Angeles...

Resource Type:

Masters Thesis
Geology and geochemistry of Juniper Ridge, Horsehead Mountain and Burns Butte : implications for the petrogenesis of silicic magma on the High Lava Plains, southeastern Oregon

Creator:

MacLean, James W.

Abstract:

The Juniper Ridge volcanic complex is located in the High Lava Plains Province of southeastern Oregon, a wide zone of bimodal volcanism and faulting that marks the northern limit of widespread Basin and Range-style faulting in the northern Great Basin Province. Rhyolite dome complexes are progressively younger to the northwest...

Resource Type:

Masters Thesis
Hydrologic integration of forest roads with stream networks in two basins, western Cascades, Oregon

Creator:

Wemple, Beverly C.

Abstract:

This study assessed how logging-access roads may have contributed to observed historical increases in peak discharges associated with small and large logged basins in the western Cascades of Oregon. The study was conducted on the Lookout Creek (62km²) and the upper Blue River (118km²) basins. Potential road effects on hydrology...

Resource Type:

Masters Thesis
Geology, geochemistry, and mineralization of the Liberty Bell Gold Mine area, Alaska

Creator:

Yesilyurt, Suleyman

Resource Type:

Masters Thesis
Geographic information systems : suitability to a land use planning problem

Creator:

Harmon, Robert C.

Abstract:

Geographic Information Systems (GIS) is a burgeoning field with its roots in geography. It is increasingly being used by a large variety of disciplines, including land use planning, as a decision support tool to help solve complex spatial problems. At Oregon State University, researchers have developed an analog model which...

Resource Type:

Masters Thesis
Moment-tensor inversion for regional earthquakes in the Pacific Northwest

Creator:

Xia, Ganyuan

Resource Type:

Masters Thesis

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Academic Affiliation

Geosciences[remove]86
Civil, Construction, and Environmental Engineering1

Advisor

Kimerling, A. Jon7
Yeats, Robert S.7
Dilles, John H.6
Nabelek, John L.5
Niem, Alan R.5
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1990 to 2000

View distribution

Committee Member

Chen, John4
Field, Cyrus4
Grunder, Anita4
Dilles, John3
Egbert, Gary3
more Committee Members »

Creator

Fleming, Sean W.2
Ahmad, Irshad1
Barczak, Mary J.1
Barrett, Charley, 1965 1
Berkman, Thomas Anthony1
more Creators »

Date

Date range begin – Date range end

Current results range from 1990 to 1999

View distribution

Decade

1990-1999[remove]86

Degree Field

Geology51
Geography19
Geophysics11
Geosciences5
Civil Engineering1

Degree Level

Master's86

Degree Name

Master of Science (M.S.)[remove]86

Language

English [eng][remove]86

License

All rights reserved6

Non-Academic Affiliation

Oregon State University. Graduate School86

Peer Reviewed

No81

Resource Type

Masters Thesis[remove]86

Rights Statement

Copyright Not Evaluated55
In Copyright31

Subject

Geology, Stratigraphic5
Geographic information systems3
Geology, Stratigraphic -- Eocene3
Geology, Structural -- Oregon3
Geology, Structural -- Pakistan3
more Subjects »

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