Alphabetical listing of categories: C

C -> carbon (1) cabins -> buildings (4) cairns -> monuments (1) calcareous nannoplankton (1) calderas -> craters (12) camera calibration (1) camera calibration (1) camera tows -> underwater photography (1) field campaigns -> research areas (3) camping -> recreation (2) mining camps -> mine sites (7) canoeing -> recreation (2) capes (1) capturing (animals) (11) caravan routes -> transportation features (4) carbon (1) carbon-14 analysis (1) carbon cycling (1) carbon dating -> carbon-14 analysis (1) carbon isotope analysis (3) scientific careers (8) careers in science -> scientific careers (8) carillons -> towers (1) carnivores (6) cartography (73) digital cartography -> cartography (73) castles -> buildings (4) catastrophes -> hazards (96) catchments -> drainage basins (45) Categories (353) cattle dipping tanks -> agricultural sites (3) causeways -> roadways (2) cave entrances -> caves (2) caverns -> caves (2) caves (2) caving -> recreation (2) cays -> islands (6) cell biology (1) cellular biology -> cell biology (1) animal and plant census (3) census -> animal and plant census (3) faunal and floral census (microscopic) (1) archaeological centers -> research facilities (2) atomic centers -> research facilities (2) civic centers -> buildings (4) community centers -> buildings (4) convention centers -> buildings (4) facility centers -> buildings (4) neighborhood centers -> buildings (4) space centers -> research facilities (2) visitor centers -> buildings (4) cerros -> mountains (2) food chain -> food web (3) polymerase chain reaction (1) climate change (16) climatic change -> climate change (16) global change (10) global climate change -> climate change (16) land use change (20) sea-level change (5) channels (2) lake channels -> channels (2) marine channels -> channels (2) navigation channels -> channels (2) chapparal areas -> shrublands (2) earth characteristics (264) land surface characteristics (31) ocean bottom characteristics -> sea-floor characteristics (36) ocean characteristics (52) sea-floor characteristics (36) sea floor characteristics -> sea-floor characteristics (36) seafloor characteristics -> sea-floor characteristics (36) baseline characterization -> field inventory and monitoring (324) chemical analysis (29) chemical elements (9) chemical oceanography -> marine chemistry (1) natural attenuation (harmful chemicals) -> biodegradation (3) environmental chemistry -> biochemistry (5) marine chemistry (1) ocean chemistry -> marine chemistry (1) soil chemistry (2) water chemistry (57) chemistry (Earth sciences) -> geochemistry (98) chemistry (life sciences) -> biochemistry (5) chloride concentration -> salinity (3) chondrites -> meteorites (5) chromatography (3) gas chromatography (1) high-pressure liquid chromatography -> liquid chromatography (1) liquid chromatography (1) chrome mines -> mine sites (7) chronostratigraphy -> geologic history (33) chutes (hydrographic) -> channels (2) cienagas -> wetlands (26) traffic circles -> roadways (2) atmospheric circulation (3) estuarine circulation (1) -> water circulation WITH estuarine ecosystems lake circulation -> water circulation (3) ocean circulation (2) water circulation (3) circulation (ocean) -> ocean circulation (2) circulation (water) -> water circulation (3) cities (6) city halls -> buildings (4) civic centers -> buildings (4) civil areas -> administrative areas (9) civil buildings -> buildings (4) clay deposits (1) clearings -> grasslands (10) cleavage (rock) -> fracture (geologic) (8) climate -> atmospheric and climatic processes (87) climate change (16) global climate change -> climate change (16) climate history -> climate change (16) climate variability -> climate change (16) climatic change -> climate change (16) atmospheric and climatic processes (87) climatology (15) climbing -> recreation (2) clines -> ecosystems (221) club houses -> buildings (4) coal bed methane resources -> coalbed methane resources (7) coalbed methane resources (7) coalfields -> mineral deposit areas (5) coal fields -> mineral deposit areas (5) coal mines -> mine sites (7) bituminous coal resources -> coal resources (12) coal resources (12) subbituminous coal resources -> coal resources (12) coastal ecosystems (38) coastal fisheries -> marine fishery resources (2) coastal fishing -> marine fishery resources (2) coastal plains -> coastal zones (43) coastal zones (43) coast guard stations -> buildings (4) coasts -> coastal zones (43) coccoliths -> calcareous nannoplankton (1) coconut groves -> woods (1) coelenterates (8) specimen collecting (9) data collection facilities (1) collection of specimens -> specimen collecting (9) collieries -> mine sites (7) agricultural colonies -> populated places (8) comet impact -> impact cratering (3) commemorative areas -> parks (7) commensalism -> symbiosis (1) commerce -> business and economics (3) commercial fishery resources (1) commercial water use (1) commissaries -> buildings (4) commons -> parks (7) commonwealths -> political areas (1) communes -> populated places (8) communities -> populated places (8) community centers -> buildings (4) community ecology (3) population and community ecology (291) community houses -> buildings (4) ecological competition (2) composite burn index (1) -> fire damage WITH remote sensing atmospheric composition (9) rock composition -> rocks and deposits (56) computational methods (75) computer science (1) chloride concentration -> salinity (3) sea-ice concentration -> sea ice concentration (2) sea ice concentration (2) concession areas -> administrative areas (9) cones (geological) -> physiographic features (87) conference facilities -> buildings (4) conflict resolution methods -> decision support methods (4) confluences -> streams (51) coniferous forests ecosystems -> forest ecosystems (20) conodonts (2) conservation -> natural resource management (162) resource conservation -> natural resource management (162) conservation areas -> reserves (2) dissolved constituents -> water quality (254) consulates -> buildings (4) consumers (organisms) (7) consumptive use (water) -> water use (33) dissolved contaminants -> water quality (254) natural contaminants -> contamination and pollution (108) contaminant transport (24) biocide contamination -> pesticide and herbicide contamination (12) herbicide contamination -> pesticide and herbicide contamination (12) insecticide contamination -> pesticide and herbicide contamination (12) mercury contamination (11) pesticide and herbicide contamination (12) pharmaceutical contamination (2) toxic radionuclide contamination (3) toxic trace element contamination (15) contamination and pollution (108) nitrogen content -> nutrient content (water) (11) phosphorus content -> nutrient content (water) (11) nutrient content (water) (11) oxygen content (water) (9) shelves, continental -> continental margins (8) continental drift -> tectonic processes (20) continental lithosphere (1) continental margins (8) continental rises -> continental margins (8) continental shelves -> continental margins (8) continental slopes -> continental margins (8) contour lines -> topography (56) structure contours (2) underwater contours -> bathymetry (27) fire control (1) pest control (1) controlled burns -> controlled fires (1) controlled fires (1) controlled flooding (2) convention centers -> buildings (4) coordinate systems -> map coordinate systems (3) geographic coordinate systems -> map coordinate systems (3) grid coordinate systems -> map coordinate systems (3) map coordinate systems (3) copper (1) copper mines -> mine sites (7) coral reef ecosystems -> reef ecosystems (13) coral reefs (1) corals -> coelenterates (8) cordilleras -> mountains (2) core (earth) (2) inner core (earth) (1) outer core (earth) (1) core analysis (8) core sampling -> drilling and coring (16) ice core sampling (1) -> snow and ice cover WITH drilling and coring coring -> drilling and coring (16) drilling and coring (16) corn belts -> agricultural regions (1) corrals -> agricultural sites (3) correlation -> regression analysis (1) corridors -> transportation features (4) cotton plantations -> agricultural sites (3) coulees -> arroyos (2) counties -> countries, 2nd order divisions (1) countries, 2nd order divisions (1) inductively coupled plasma-atomic emission spectrometry -> atomic emission spectroscopy (2) land use and land cover (48) sea ice cover -> sea ice concentration (2) snow and ice cover (19) covered bridges -> bridges (2) covered reservoirs -> reservoirs (3) coves -> bays (9) horseshoe crabs (1) impact cratering (3) crater lakes -> lakes (25) craters (12) craton -> continental lithosphere (1) creeks -> streams (51) tidal creeks -> streams (51) creep -> mass wasting (16) crenulation (geologic) -> folding (geologic) (1) crevasses -> physiographic features (87) croplands -> agricultural sites (3) cultivated croplands -> agricultural sites (3) crossings -> transportation features (4) crushed stone -> building stone resources (1) crust (earth) (12) crustaceans (8) cryology -> glaciology (7) cryosphere -> snow and ice cover (19) crystallography -> mineralogy (14) crystals -> rocks and deposits (56) CTD measurement (1) Cu -> copper (1) cultivated areas -> agricultural sites (3) cultivated croplands -> agricultural sites (3) culture and demographics (9) culturing (specimens) (1) Curie temperature analysis (1) stream current -> streamflow (108) ocean current measurement (1) -> field inventory and monitoring WITH ocean currents stream current monitoring -> stream-gage measurement (109) acoustic doppler current profiler -> acoustic doppler current profiling (1) acoustic doppler current profiling (1) currents -> ocean currents (1) estuarine currents (1) -> water circulation WITH estuarine ecosystems ocean currents (4) ocean currents (1) customs houses -> buildings (4) customs posts -> buildings (4) cutoffs (hydrographic) -> channels (2) road cuts -> roadways (2) peat cutting areas -> wetlands (26) food cycle -> food web (3) hydrologic cycle -> water cycle (1) water cycle (1) wilson cycle -> tectonic processes (20) biogeochemical cycling (9) carbon cycling (1) nutrient cycling (5) cytology -> cell biology (1)

Alphabetical index of categories: C