Subject
- Carbon cycle (Biogeochemistry) -- Northwest, Pacific1
- Dikes (Geology) -- Columbia River Watershed1
- Flood basalts -- Columbia River Watershed1
- Fluvial geomorphology -- Oregon -- Clackamas River Valley1
- Invasive plants -- Ecology -- Oregon -- H.J. Andrews Experimental Forest1
- Magmas1
- Olivine -- Metallurgy1
- Plagioclase -- Metallurgy1
- Plant biomass -- Northwest, Pacific1
- Plant invasions -- Oregon -- H.J. Andrews Experimental Forest1
- Purple foxglove -- Ecology -- Oregon -- H.J. Andrews Experimental Forest1
- Scotch broom -- Ecology -- Oregon -- H.J. Andrews Experimental Forest1
- Trees -- Environmental aspects -- Northwest, Pacific1
- Trees -- Northwest, Pacific -- Composition1