Portland State University. Department of Earth Sciences
Paul E. Hammond
Date of Award
Master of Science (M.S.) in Geology
1 online resource (198 p.)
Geology -- Oregon -- Mount Jefferson Wilderness
The volcanic stratigraphy and petrography is described for a 46 km2 area on the southern flank of Mount Jefferson in the north-central part of the Oregon High Cascades. Here, volcanic processes have been active throughout Quaternary time, resulting in complex stratigraphic relationships. In addition, three formerly recognized glaciations and a two-phase period of neoglaciation have eroded the terrain, depositing tills in contact or interstratified with the volcanic units. Collectively, these processes and the resulting deposits are characteristic of High Cascades development.
Gannon, Brian Lee, "Geology of a volcanic complex on the south flank of Mount Jefferson, Oregon" (1981). Dissertations and Theses. Paper 3268.