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Filtering by: Subject Geology -- Oregon -- Clatsop County Committee Member Atta, Van

Surface-subsurface geology of the middle to upper Eocene sedimentary and volcanic rock units, western Columbia County, northwest Oregon

Creator:

Berkman, Thomas Anthony

Abstract:

The middle to upper Eocene Tillamook Volcanics form the basement in the Rock Creek - Rocky Point area. These tholeiitic to alkalic basalts, basaltic andesites, and andesites were erupted as shield volcanoes seaward of the strandline ontop of an older deep-marine mudstone unit (Yamhill Formation) and an accreted portion of...

Resource Type:

Masters Thesis