Dee D TrentD. D. �Dee� Trent, Ph.D., has worked with or taught geology since 1955. After graduating from college, he worked in the petroleum industry where his geologic skills were sharpened doing projects in Utah, Arizona, California and Alaska. hen the company offered to send him to Libya he decided it was time to become a college geology teacher. He earned a doctorate from the University of Arizona and for 28 years he taught geology, physical oceanography and physics at Citrus Community College. He has also served as an adjunct professor at the University of Southern California, taught mini-courses for the University of California at Riverside Extension Division, worked for the National Park Service, done field work on glaciers in California and Alaska, appeared on several episodes of the PBS telecourse The Earth Revealed, authored or co-authored papers on various geologic and mining topics, and co-authored (with Richard Hazlett) the text Joshua Tree National Park Geology. Now retired, Dee enjoys playing banjo and guitar in jazz combos and oil painting en plein air. Read More Read Less