Index Catalog // ScholarsArchive@OSU

Geology of the Elsie-lower Nehalem River area, south-central Clatsop and northern Tillamook counties, northwestern Oregon

Creator:: Mumford, Daniel Franklin
Abstract:: The middle Eocene Tillamook Volcanics form the oldest rock unit in the Elsie-lower Nehalem River area. K-Ar age determinations and age constraints imposed by foraminiferal and calcareous nannofossil assemblages of overlying sedimentary strata indicate an absolute age of about 42 Ma for the uppermost Tillamook Volcanics. Major oxide values indicate...
Resource Type:: Masters Thesis

Evaluating microbial indicators of environmental condition in Oregon rivers

Creator:: Pennington, Alan Travis
Abstract:: Traditional public health bacterial indicators of water quality and the Biolog® system were evaluated to compare their response to other indicators of stream condition with the state of Oregon and between ecoregions (Coast Range, Willamette Valley, Cascades, and Eastern Oregon). Forty-three randomly selected Oregon rivers were sampled during the summer...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Alan Travis Pennington for the

Geology of the Green Mountain-Young's River area, Clatsop County, northwest Oregon

Creator:: Peterson, Carolyn Pugh
Abstract:: The upper Eocene to lower Oligocene Oswald West mudstone is the oldest formation (informal) in the Green Mountain-Young's River area. This 1,663 meter thick hemipelagic sequence was deposited in a low-energy lower to upper slope environment in the Coast Range forearc basin. The formation ranges from the late Narizian to...
Resource Type:: Masters Thesis

Geology of the Seaside-Young's River Falls area, Clatsop County, Oregon

Creator:: Tolson, Patrick Marion
Abstract:: Eight Tertiary geologic units crop out in the Seaside-Young's River Falls area, including late Oligocene to early Miocene Oswald West mudstones; Angora Peak sandstone and Silver Point members of the middle Miocene Astoria Formation, and middle Miocene Depoe Bay and Cape Foulweather Basalts. Three new lithologically distinct units, the 'J'...
Resource Type:: Masters Thesis

Geology of the Hamlet-North Fork of the Nehalem River area, southern Clatsop and northernmost Tillamook Counties, northwest Oregon

Creator:: Rarey, Phillip Jay
Abstract:: The middle to late Eocene tholeiitic Tillamook Volcanics compose the oldest rock unit in the Hamlet-North Fork of the Nehalem River area. Geochemical plots and field relationships indicate that these rocks were produced in an extensional tectonic setting in the developing forearc and formed an extensive tholeiltic oceanic island. The...
Resource Type:: Masters Thesis

Trace metal concentrations in the signal crayfish, Pacifastacus leniusculus (Decapoda: Astacidae), and the stonefly Pteronarcys californica (Plecoptera: Pteronarcyidae) along a downstream gradient of the Umatilla River

Creator:: Snyder, Jennifer L.
Abstract:: Metals are a persistent form of freshwater pollution and have been shown to bioaccumulate in aquatic macroinvertebrates through direct contact with contaminated water, sediments, and through consumption of contaminated organisms. This research explored the longitudinal bioaccumulation patterns of 5 common trace metals (Cr, Cu, Zn, Cd, and Pb) in the...
Resource Type:: Masters Thesis
Full Text:: : Pteronarcyidae) along a Downstream Gradient of the Umatilla River Abstract approved: Alan T. Herlihy

Resistance of three freshwater fishes to fluctuating thermal environments

Creator:: DeHart, Douglas Alan
Abstract:: The resistance to elevated temperatures of three species of freshwater fishes, Oncorhynchus kisutch, Rhinichthys osculus nubilus, and Cottus perplexus was studied. Rock Creek and Greasy Creek, Benton County, Oregon, were surveyed to evaluate the nature of thermal stress encountered in the small cold water stream environment. Resistance to constant temperature...
Resource Type:: Masters Thesis

The oligocene and miocene geology of the Tillamook embayment Tillamook County, northwest Oregon

Creator:: Parker, Michael J. (Michael John), 1958-
Abstract:: Eleven sedimentary and volcanic rock units are mapped and described in the thesis area, and chronicle the dynamic geologic history of the Tillamook embayment from the Oligocene through the middle Mlocene. The oldest unit is the Zemorrian to early Saucesian Smuggler Cove formation, a bathyal tuffaceous mudstone with some thin-...
Resource Type:: Masters Thesis

Sequence stratigraphy and lithofacies of the middle Eocene upper McIntosh and Cowlitz Formations, geology of the Grays River Volcanics, Castle Rock - Germany Creek area, southwest Washington

Creator:: Kleibacker, Derik W.
Abstract:: A composite 732-rn thick section in Germany Creek of middle Eocene upper McIntosh and lower Cowlitz Formations, as well as the lower Grays River Volcanics, was studied using bio-, magneto- and lithostratigraphy to construct a sequence stratigraphic framework and assess hydrocarbon exploration potential. The upper McIntosh Formation forms a complete...
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

ScholarsArchive@OSU

Geology of the Elsie-lower Nehalem River area, south-central Clatsop and northern Tillamook counties, northwestern Oregon

Evaluating microbial indicators of environmental condition in Oregon rivers

Geology of the Green Mountain-Young's River area, Clatsop County, northwest Oregon

Geology of the Seaside-Young's River Falls area, Clatsop County, Oregon

Geology of the Hamlet-North Fork of the Nehalem River area, southern Clatsop and northernmost Tillamook Counties, northwest Oregon

Trace metal concentrations in the signal crayfish, Pacifastacus leniusculus (Decapoda: Astacidae), and the stonefly Pteronarcys californica (Plecoptera: Pteronarcyidae) along a downstream gradient of the Umatilla River

Resistance of three freshwater fishes to fluctuating thermal environments

The oligocene and miocene geology of the Tillamook embayment Tillamook County, northwest Oregon

Sequence stratigraphy and lithofacies of the middle Eocene upper McIntosh and Cowlitz Formations, geology of the Grays River Volcanics, Castle Rock - Germany Creek area, southwest Washington

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

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