Alphabetical listing of categories: U

unconsolidated deposits (13) underground lakes -> caves (2) underwater contours -> bathymetry (27) underwater features -> seafloor features (10) underwater photography (1) student unions -> buildings (4) United States Government establishments -> buildings (4) bedrock geologic units (7) geologic units -> stratigraphic sections (23) governmental units -> administrative and political boundaries (4) surficial geologic units (18) unsaturated zone (3) uplands -> physiographic features (87) upwellings -> hydrographic features (165) uranium-lead analysis (1) uranium-thorium analysis (1) urban areas -> cities (6) urbanization -> land use change (20) urban parks -> parks (7) urban runoff -> runoff (4) urochordates -> tunicates (2) agricultural water use (5) commercial water use (1) domestic water use (4) drinking water use (3) hydroelectric power generation water use -> power generation water use (3) in-stream water use -> instream water use (7) instream water use (7) livestock water use -> agricultural water use (5) mining water use (1) off-stream water use -> offstream water use (11) offstream water use (11) power generation water use (3) residential water use -> domestic water use (4) rural water use -> agricultural water use (5) thermoelectric power generation water use -> power generation water use (3) wastewater use (4) water use (33) consumptive use (water) -> water use (33) land use and land cover (48) public use areas -> parks (7) land use change (20) water utilities -> water use (33)

Alphabetical index of categories: U