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documents fauna BT: biologic and ecologic information NT: fish invertebrates mammals film BT: non-digital format fires BT: natural hazards and disasters fish BT: fauna flooding BT: natural hazards and disasters format NT: digital format non-digital format fossils BT: biologic and ecologic information RT: paleontology Frequently Asked Questions (FAQs) USE: customer support and user feedback fresh water resources and characteristics BT: water resources information NT: ground water surface water RT: water quality gazetteers USE: geographic names gemstones UF: precious stones BT: economic geology geochemistry BT: geology and geophysics geochronology BT: geology and geophysics geodectic and gravity data BT: earth sciences geographic names UF: gazetteers placenames BT: references geologic hazards USE: natural hazards and disasters geologic maps UF: subsurface maps BT: maps geologic names BT: references Geological Information System data USE: GIS data geology and geophysics UF: geophysics 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customer support and user feedback professional papers BT: text documents quicktime BT: digital video format recent data BT: temporal coverage references BT: object types NT: administrative and political boundaries controlled vocabularies geographic names geologic names glossaries hydrologic units remote-sensing images BT: images and photographs resource conversation UF: conversation BT: cultural and demographic information rivers and river systems UF: streamflow data BT: surface water rtf BT: digital text format scanned images BT: data origin science programs BT: USGS program and policy descriptions search services BT: information services RT: clearinghouses libraries and archives seismic data USE: geology and geophysics sewer and waste utilities BT: utilities sgml BT: digital text format sinkholes BT: natural hazards and disasters slides BT: non-digital format snow cover and ice information UF: glaciers ice BT: topics software BT: object types solid earth information USE: geology and 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professional papers standards theses and dissertations water-supply papers yearbooks theses and dissertations BT: text documents tiff BT: digital image format topics NT: atmospheric and climatic information biologic and ecologic information cadastral and legal land descriptions cartography cultural and demographic information earth sciences energy and mineral resources environmental data and modeling infrastructure natural hazards and disasters snow cover and ice information surface features, soils, and land cover water resources information topographic and base maps UF: base maps BT: maps RT: elevation data and derived products transportation networks and models BT: infrastructure user services NT: accessing data/products customer support and user feedback educational services exhibits and facility tours information services other services USGS directories of personnel and programs BT: USGS program and policy descriptions USGS program and policy descriptions NT: current projects and 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object types wetlands BT: surface features, soils, and land cover what's new USE: current projects and news xml BT: digital text format yearbooks BT: text documents zip BT: digital application format