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

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

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

The geology of the Elk Mountain-Porter Ridge area, Clatsop County, northwest Oregon

Creator:: Goalen, Jeffrey Scott
Abstract:: Eight Tertiary sedimentary and volcanic units crop out in the thesis area. From oldest to youngest they are the: Sager Creek formation (informal); Pittsburg Bluff Formation; Northrup Creek formation (informal); Smuggler Cove formation (informal); Wickiup Mountain and Cannon Beach members (both informal) of the Astoria Formation; the Grande Ronde Basalt,...
Resource Type:: Masters Thesis

Geology of the Buster Creek-Nehalem Valley area, Clatsop County, northwest Oregon

Creator:: Olbinski, James Steven
Abstract:: Six Tertiary rock units are exposed in the Buster Creek-Nehalem Valley area. They are, from oldest to youngest: upper Eocene Tillamook Volcanics; upper Eocene Cowlitz Formation; upper Eocene Keasey Formation; upper Eocene Vesper Church formation (informal); upper Eocene to Oligocene Pittsburg Bluff Formation; and middle Miocene Depoe Bay Basalt. The...
Resource Type:: Masters Thesis

Stratigraphy, structure, and natural gas potential of tertiary sedimentary and volcanic units, Clatskanie 7.5 minute quadrangle, Northwest Oregon

Creator:: Eriksson, Andrew
Abstract:: The geology and natural gas potential of the Clatskanie 7.5-minute quadrangle in Columbia County, Oregon was studied utilizing a combination of geologic mapping, measuring of stratigraphic sections, diatom and molluscan fossil identifications, with subsurface geophysical data and petrographic and geochemical analyses. The stratigraphy of the study area consists of two...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

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

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

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

The geology of the Elk Mountain-Porter Ridge area, Clatsop County, northwest Oregon

Geology of the Buster Creek-Nehalem Valley area, Clatsop County, northwest Oregon

Stratigraphy, structure, and natural gas potential of tertiary sedimentary and volcanic units, Clatskanie 7.5 minute quadrangle, Northwest Oregon

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