Alphabetical listing of categories: V

vadose zone -> unsaturated zone (4) hanging valleys -> valleys (2) median valleys -> valleys (2) valleys (2) shelf valleys (seafloor) -> seafloor features (11) climate variability -> climate change (17) vascular plants (8) disease vectors (4) aquatic vegetation (1) vegetation -> biogeographic regions (53) vegetation (28) vertebrate paleontology (5) vertebrates (157) vertebrate zoology (56) vertical datums -> map coordinate systems (2) Advanced Very High Resolution Radiometer (AVHRR) -> AVHRR (9) viaducts -> bridges (2) videography (7) remote video monitoring -> video monitoring (6) video monitoring (6) villages -> populated places (7) village squares -> parks (7) vineyards -> agricultural sites (3) virology (6) viruses (6) airborne visible infrared imaging spectrometer -> AVIRIS (1) visible light imaging (1) visitor centers -> buildings (4) visualization -> visualization methods (6) visualization methods (6) vocalization methods (1) volcanic activity (49) volcanic ash -> volcanic rocks (4) volcanic eruption prediction (4) volcanic features (38) volcanic rocks (4) volcanic tremors -> volcanic activity (49) volcanism -> volcanic activity (49) volcanoes (36) volcanology (49) volcano monitoring (11) -> volcanic activity WITH field inventory and monitoring volcano observatories -> science centers (22) volcanos -> volcanoes (36) employment and volunteer opportunities (10) vulcanology -> volcanology (49)