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Filtering by: Subject Geochemistry -- Oregon

Geochemical evolution of the Roseburg formation basaltic rocks, southern Oregon coast range

Creator:

Pyle, Douglas G.

Abstract:

The Paleocene-lower Eocene volcanic rocks of the southern Oregon Coast Range Roseburg Formation are the oldest remnant eruptive sequence of an oceanic islandseamount province which is presently exposed along a north-south lineament that stretches from Vancouver, B.C. into southwestern Oregon. This seamount terrane is thought to have formed on the...

Resource Type:

Masters Thesis
Geology and geochemistry of Juniper Ridge, Horsehead Mountain and Burns Butte : implications for the petrogenesis of silicic magma on the High Lava Plains, southeastern Oregon

Creator:

MacLean, James W.

Abstract:

The Juniper Ridge volcanic complex is located in the High Lava Plains Province of southeastern Oregon, a wide zone of bimodal volcanism and faulting that marks the northern limit of widespread Basin and Range-style faulting in the northern Great Basin Province. Rhyolite dome complexes are progressively younger to the northwest...

Resource Type:

Masters Thesis