Subject
- Geochemistry -- Oregon -- Linn County1
- Geology -- Oregon -- Bohemia District (Lane County)1
- Geology -- Oregon -- Coos County1
- Geology -- Oregon -- Douglas County1
- Geology -- Oregon -- Lake County1
- Geology -- Oregon -- Lake County -- Coyote Hills1
- Geology -- Oregon -- Linn County1
- Geology -- Oregon -- Marion County1
- Geology, Stratigraphic1
- Geology, Structural -- Oregon -- Marion County1
- Gold mines and mining -- Oregon -- Crook County1
- Gold ores -- Geology -- Oregon -- Crook County1
- Hydrothermal deposits -- Oregon -- Marion County1
- Mineralogy -- Oregon -- Lake County1
- Mineralogy -- Oregon -- Linn County1
- Mines and mineral resources -- Oregon -- Crook County1
- Mines and mineral resources -- Oregon -- Douglas County1
- Petrology -- Oregon -- Marion County1