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Filtering by: Committee Member Nielsen, Roger L. Subject Geology, Stratigraphic -- Oligocene

Early Oligocene intrusions in the central Coast Range of Oregon : petrography, geochemistry, geochronology and implications for the Tertiary magmatic evolution of the Cascadia forearc

Creator:

Oxford, Jeremiah

Abstract:

The Early Oligocene Oregon Coast Range Intrusions (OCRI) consist of gabbroic rocks and lesser alkalic intrusive bodies that were emplaced in marine sedimentary units and volcanic sequences within a Tertiary Cascadia forearc basin. The alkalic intrusions include nepheline syenite, camptonite, and alkaline basalt. The gabbros occur as dikes and differentiated...

Resource Type:

Masters Thesis

Full Text:

Duncan for his contribution to the geochronology work and for lending use of his laboratory; to Roger
Petrology of the reversely zoned Mickey Pass Tuff, west-central Nevada

Creator:

Templeton, Jeffrey H.

Resource Type:

Dissertation

Full Text:

me pinpoint several key localities in the northern Gillis Range. Roger Nielsen provided his