Incoming Resources
- Thomas Condon, pioneer geologist of Oregon, by Ellen Condon McCornack
- Geology of Central Oregon, The Crooked River Caldera, Carrie Gordon
- Tales the mountains told, the geology of Oregon's mountains
- Oregon geology ;, a revision of "The two islands," by Thomas Condon, with a few tributes to the life and work of the author, ed. by Ellen Condon McCornack
- Oregon's dry side, exploring east of the Cascade Crest, Alan D. St. John
- Geology of Oregon, Elizabeth L. Orr, William N. Orr
- Mount Multnomah, ancient ancestor of the Three Sisters, by Edwin T. Hodge
- Geology of north central Oregon, by Edwin T. Hodge