Portland, Oregon | Oregon | United States Department of Defense | United States Department of State | United States Department of Justice | United States Department of Agriculture | United States Department of Energy | Eugene, Oregon | United States Department of War | Geology | Oregon State University | University of Oregon | United States Department of Veterans Affairs | United States Department of the Treasury | geology | War Department | Los Angeles Police Department | United States Department of Transportation | Oregon Trail | Beni Department | Department of Energy | United States Department of Labor | Oregon House of Representatives | Cochabamba Department | United States Department of Health and Human Services | Kawasaki Heavy Industries | Imperial Chemical Industries | United States Department of Education | Antioquia Department | United States Department of the Interior |
The system got its name from Ronald Greeley of NASA who named it during his study of lava tubes for the Oregon Department of Geology and Mineral Industries.