Index Catalog // ScholarsArchive@OSU

Base and precious metal deposits in the western Cascades of Oregon and southern Washington : mineralogy, fluid inclusion, and sulfur isotopes

Creator:: Summers, Cathy A.
Resource Type:: Masters Thesis
Full Text:: the physiographic provinces of western Oregon and southern Washington. (C - Cascade Range, W - Western

Petrogenesis of compositionally distinct silicic volcanoes in the Three Sisters region of the Oregon Cascade Range : the effects of crustal extension on the development of continental arc silicic magmatism

Creator:: Hill, Brittain Eames
Abstract:: The Three Sisters region of the Oregon High Cascades has developed three compositionally and petrogenetically distinct silicic (i.e., SiO₂ ≥ 58%) magma systems within the last 600 k.y. These silicic systems evolved from the same High Cascade mafic magma system and developed in the same 20x30 km area of the...
Resource Type:: Dissertation

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

Spatial and temporal patterns of forest cover in the central western Cascades of Oregon and southeast Zaire : a test of distance decay and deforestation models

Creator:: Kikombo, Ilunga Ngoy
Abstract:: The Central Western Cascades and southeast Zaire were selected to test the distance decay and deforestation models on forest environments. Distance gradients included away from cities, and away from highways/roads. Two forest definitions were used in each study site. The "extended-forest" definition included areas with at least 30 percent canopy...
Resource Type:: Dissertation

Spatial patterns of invasion by exotic plants in a forested landscape

Creator:: Parendes, Laurie Anne, 1958-
Abstract:: Few landscapes are immune to invasion by exotic plant species. The forested landscape in the western Cascade Range of Oregon appears to have some barriers to invasion, but the extensive road network provides a corridor and habitat for a suite of exotic species to enter and become established. This study...
Resource Type:: Dissertation

Structural and functional comparison of human-impacted and natural forest landscapes in the western Cascades of Oregon

Creator:: Pennington, Deana D.
Abstract:: This study compared effects of human and natural wildfire disturbance on age class distribution and associated ecosystem properties of forests in a 15,670 km2 area of the western Cascades of Oregon. The study site is characterized by three forest use types: low elevation, intensively harvested private industrial lands; mid elevation...
Resource Type:: Dissertation

The role of subduction fluids in generating compositionally diverse basalts in the Cascadia subduction zone

Creator:: Rowe, Michael C.
Abstract:: The primary goal of this study is to assess the impact of a subduction component added to the mantle wedge beneath the Oregon Cascades to the composition and fO2 of primitive Cascade basalts. Olivine-hosted melt inclusions from compositionally diverse basalts across the Cascade arc (~100 km) are utilized in an...
Resource Type:: Dissertation

A method for remotely monitoring glaciers with regional application to the Pacific Northwest

Creator:: Medley, Brooke
Abstract:: An integrative method for monitoring glacier geometry change and mass balance is presented and applied to the Pacific Northwest, USA. Acting as a baseline for interpretation of future changes in glacier size and shape, we first derive a new inventory of regional glacier cover using remotely sensed data. To investigate...
Resource Type:: Masters Thesis
Full Text:: ± 5.0 km 2 ) and the Cascade volcanoes of Washington and Oregon (96.0 ± 4.8 km 2 ) contain similar ice

Forest-meadow dynamics in the central western Oregon Cascades : topographic, biotic,and environmental change effects

Creator:: Rice, Janine M.
Abstract:: Montane meadows comprise a small area of the predominantly forested landscape of the Oregon Cascade Range. Tree encroachment in the last century in these areas has threatened a loss of biodiversity and habitat. Climate change in the coming century may accelerate tree encroachment into meadows, and exacerbate biodiversity loss. Multiple...
Resource Type:: Dissertation
Full Text:: ecosystems at Lookout (44º 22′N, 122º 13′W) of the Western Cascade Range and Bunchgrass (44º 17′N, 121º 57

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

Creator:: Tepley, Alan J.
Abstract:: Descriptions of the fire regime in the Douglas-fir/western hemlock region of the Pacific Northwest traditionally have emphasized infrequent, predominantly stand-replacement fires and an associated linear pathway of stand development, where all stands proceed along a common pathway until reset by the next fire. Although such a description may apply in...
Resource Type:: Dissertation
Full Text:: Cascade Range. Major objectives were to (1) develop a conceptual model of fire-mediated pathways of

ScholarsArchive@OSU

Base and precious metal deposits in the western Cascades of Oregon and southern Washington : mineralogy, fluid inclusion, and sulfur isotopes

Petrogenesis of compositionally distinct silicic volcanoes in the Three Sisters region of the Oregon Cascade Range : the effects of crustal extension on the development of continental arc silicic magmatism

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

Spatial and temporal patterns of forest cover in the central western Cascades of Oregon and southeast Zaire : a test of distance decay and deforestation models

Spatial patterns of invasion by exotic plants in a forested landscape

Structural and functional comparison of human-impacted and natural forest landscapes in the western Cascades of Oregon

The role of subduction fluids in generating compositionally diverse basalts in the Cascadia subduction zone

A method for remotely monitoring glaciers with regional application to the Pacific Northwest

Forest-meadow dynamics in the central western Oregon Cascades : topographic, biotic,and environmental change effects

Age structure, developmental pathways, and fire regime characterization of Douglas-fir/western hemlock forests in the central western Cascades of Oregon

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