shelf valleys (seafloor) -> seafloor features (1) vanadium (150) vegetation (5) vegetation -> biogeographic regions (1) vertebrates (3) village squares -> parks (2) airborne visible infrared imaging spectrometer -> AVIRIS (3) visible light imaging (2) visitor centers -> buildings (9) visualization -> visualization methods (1) visualization methods (1) vitrinite reflectance -> thermal maturation (1) volcanic activity (4) volcanic ash -> volcanic rocks (28) volcanic eruption forecasting -> volcanic eruption prediction (1) volcanic eruption prediction (1) volcanic features (5) volcanic rocks (28) volcanic tremors -> volcanic activity (4) volcanism -> volcanic activity (4) volcanoes (4) volcanology (1) volcanos -> volcanoes (4) vulcanology -> volcanology (1)