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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

Temporal variations in volume and geochemistry of volcanism in the Western Cascades, Oregon

Creator:: Verplanck, Emily Pierce
Resource Type:: Masters Thesis
Full Text:: , OREGON CHAPTER I: INTRODUCTION OVERVIEW The Cascade Range is a volcanic are which extends from

The Ore bin ; Vol. 27 No. 7 (July 1965)

Creator:: Oregon. Dept. of Geology and Mineral Industries and Taylor, Edward M., 1933-
Resource Type:: Journal
Full Text:: crest of the Oregon Cascade Range, between the Pleistocene volcanoes known as Three Fingered Jack and

Early high Cascade silicic volcanism : analysis of the McKenzie Canyon and Lower Bridge tuff

Creator:: Eungard, Daniel W.
Abstract:: Silicic volcanism in the central Oregon Cascade range has decreased in both the size and frequency of eruptions from its initiation at ~40 Ma to present. The reasons for this reduction in silicic volcanism are poorly constrained. Studies of the petrogenesis of these magmas have the potential for addressing this...
Resource Type:: Masters Thesis

Dry coniferous forests in the Western Oregon Cascades

Creator:: Means, Joseph E.
Abstract:: Pseudotsuga menziesii dominates the forests of the Pacific Northwest. But though it is dominat, Tsuaa heteroohylla or Abies amabilis is usually climax. Many researchers have studied Pseudotsuga on the widespread mesic sites where it is seral, but few have examined the relatively rare ecosystems in which Pseudotsuga or its associate...
Resource Type:: Dissertation
Full Text:: in evapor- ative demand in western Oregon (Waring et. al., 1978). Geology The Cascade Range is

Climatic and physiographic controls on peakflow generation in the western Cascades, Oregon

Creator:: Perkins, Reed
Abstract:: Despite the importance of rain and snowmelt in causing peakflows in the Pacific Northwest, the interactive effects of a snowpack and watershed physiography on streamflow are largely undocumented. This study investigated the influence of soil and snowpack moisture on peakflow hydrograph shape in three small (< 60 ha) control sub-watersheds...
Resource Type:: Dissertation

Genesis of some soils in the central western Cascades of Oregon

Creator:: Brown, R. B.
Abstract:: Soils representative of several landscape units in the H. J. Andrews Experimental Forest, Western Cascade Range, were sampled, analyzed, and tentatively classified. Genetic inferences were drawn relating soils to landscape position and other factors of soil formation. Descriptive information and nutrient capital data were provided to support ecosystem modelling efforts...
Resource Type:: Masters Thesis
Full Text:: Oregon Cascades (Peck et al., 1964). It is maturely dissected, in contrast to the High Cascade Range

Canopy epiphyte studies in the central Oregon Cascades : implications for the management of Douglas-fir forests

Creator:: Sillett, Stephen Charles
Abstract:: This thesis includes four separate studies. The first two studies assessed edge effects in a 700-year-old forest. After 20 years of exposure, epiphyte assemblages on the clearcut edge were similar to those of the forest interior, but there were some differences in vertical distribution patterns. Several species restricted to the...
Resource Type:: Dissertation
Full Text:: Oregon Cascades 5. Eastern Washington 6. Eastern Oregon Cascades 7. Oregon Coast Range 8. Willamette

Selection of day roosts by female long-legged myotis (Myotis volans) in forests of the central Oregon Cascades

Creator:: Ormsbee, Patricia
Abstract:: Measuring habitat selection by bats is complicated by their intricate life cycle. Scaling habitat measurements to reflect a hierarchal habitat selection process can help to define habitat associations of bats. I assessed day roost habitat of female long-legged myotis at four scales: the roost structure, micro-habitat surrounding the roost, the...
Resource Type:: Masters Thesis
Full Text:: volans) in forests of the central Oregon Cascades AN ABSTRACT OF THE THESIS OF Patricia C. Ormsbee

Predator assemblages in old-growth and logged sections of small Cascade streams

Creator:: Murphy, Michael Louis
Resource Type:: Masters Thesis
Full Text:: tal Forest in the western Cascade Mountains in Oregon. The steep terrain ranges 400-1600 m in

ScholarsArchive@OSU

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

Temporal variations in volume and geochemistry of volcanism in the Western Cascades, Oregon

The Ore bin ; Vol. 27 No. 7 (July 1965)

Early high Cascade silicic volcanism : analysis of the McKenzie Canyon and Lower Bridge tuff

Dry coniferous forests in the Western Oregon Cascades

Climatic and physiographic controls on peakflow generation in the western Cascades, Oregon

Genesis of some soils in the central western Cascades of Oregon

Canopy epiphyte studies in the central Oregon Cascades : implications for the management of Douglas-fir forests

Selection of day roosts by female long-legged myotis (Myotis volans) in forests of the central Oregon Cascades

Predator assemblages in old-growth and logged sections of small Cascade streams

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