Portland State University. Department of Earth Sciences
Robert O. Van Atta
Date of Award
Master of Science (M.S.) in Geology
1 online resource (104 p.)
Geochronology, Columbia County Oregon, Geologic Maps, Stratigraphy
The Cowlitz Formation in southern Columbia and Clatsop counties, northwest Oregon was studied in order to prepare a geologic map of parts of this formation and to determine the character of its lithofacies and the environments of deposition.
Timmons, Dale M., "Stratigraphy, lithofacies and depositional environment of the Cowlitz Formation, T. 4 and 5N., R. 5W. Northwest Oregon" (1981). Dissertations and Theses. Paper 3128.