Portland State University. Department of Geology
Robert O. Van Atta
Date of Award
Master of Science (M.S.) in Geology
1 online resource (91 p.)
Geology -- Oregon -- Columbia County, Basalt -- Oregon -- Columbia County, Stratigraphic geology
The study area is located in northwestern Columbia County, and covers an area of approximately 70 square kilometers. The purpose of the study was to investigate the possible correlation of the Scappoose and Astoria Formations and determine their stratigraphic relationship to the Columbia River Basalt Group through mapping, geochemistry and petrography.
Ketrenos, Nancy Tompkins, "The stratigraphy of the Scappoose formation, the Astoria formation, and the Columbia River basalt group in northwestern Columbia County, Oregon" (1986). Dissertations and Theses. Paper 3632.