Subject
- Geology, Stratigraphic -- Pleistocene5
- Mass budget (Geophysics)3
- Folds (Geology) -- Argentina -- Sierra de Villicum2
- Geology, Stratigraphic2
- Geology, Stratigraphic -- Eocene2
- Geology, Stratigraphic -- Miocene2
- Groundwater -- Pollution -- Oregon -- Willamette River Valley2
- Hood, Mount (Or.)2
- Hydrogeology -- Oregon -- Willamette River Valley2
- Nitrates -- Environmental aspects -- Oregon -- Willamette River Valley2
- Sedimentology2
- Volcanism -- Great Basin2
- Aerial photography in forestry -- Oregon1
- Altiplano1
- American Samoa -- Bathymetric maps1
- Amphiboles -- Altiplano1
- Amphiboles -- Chile -- Cerro Aucanquilcha Region1
- Animal radio tracking -- Computer programs1
- Aquifer storage recovery -- Oregon1
- Archaeological geology -- Oregon -- Pacific Coast1