Portland State University. Department of Earth Sciences
Robert O. Van Atta
Date of Award
Master of Science (M.S.) in Geology
1 online resource (99 p.)
Areal Geology, Basalts, Oregon, Oregon, Volcanic Rocks
The Tillamook Highlands is a largely unmapped volcanic pile located in the north end of the Coast Range of Oregon. The 36 square miles of T. 1 N., R. 8 W., on the southcentral margin of the Highlands, was chosen for detailed study.
The study area is composed of Eocene age sedimentary and volcanic units which were deposited in a filling basin. The lowest units were deposited in moderate to deep marine waters; the uppermost were deposited subaerially.
Cameron, Kenneth Allan, "Geology of the southcentral margin of the Tillamook Highlands; southwest quarter of the Enright Quadrangle, Tillamook County, Oregon" (1980). Dissertations and Theses. Paper 3198.