Portland State University. Department of Earth Sciences
Gilbert T. Benson
Date of Award
Master of Science (M.S.) in Geology
1 online resource (119 p.)
Stratigraphy, Geochemisty, Oregon
Fifty three sedimentary samples were analyzed for their minor and trace element concentrations utilizing instrumental neutron activation analysis. Concentrations of Na, K, La, Sm and Sc, and their ratios appear to establish significant trends. The data suggest a major break from a granitic-metamorphic provenance and a volcanic component dominated provenance between the Cowlitz and Keasey Formations respectively. The provenance of the Astoria Formation indicates the presence of flood basalts.
Kadri, Moinoddin Murtuzamiya, "Structure and influence of the Tillamook Uplift on the stratigraphy of the Mist area, Oregon" (1982). Dissertations and Theses. Paper 3226.