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125 Years of Science for America - 1879 to 2004
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Alphabetical Index of USGS Science Categories

How "Browse USGS" works
This is an alphabetical list of all USGS categories. Click on a category to see an explanation of that category plus a list of USGS websites with more information about that category.

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acid deposition
acid precipitation Use: acid deposition
acid rain Use: acid deposition
acid snow Use: acid deposition
acoustic methods
administrative and political boundaries
Advanced Very High Resolution Radiometer (AVHRR) Use: AVHRR
aerial photographs Use: aerial photography
aerial photography
aerial photos Use: aerial photography
aeromagnetic maps Use: aeromagnetic surveying
aeromagnetic surveying
aeroradiometric surveying
age dating (fission-track) Use: fission-track dating
age dating (radiometric) Use: radiometric dating
age dating (tree ring) Use: tree ring analysis
agricultural water use
agriculture and farming
air photos Use: aerial photography
air pollution Use: atmospheric composition, pollution
air temperature
airborne imaging Use: remote sensing
algae
algal blooms
algology Use: phycology
alien species Use: nonindigenous species
alluvial sedimentation Use: sedimentation
alluvial transport Use: sediment transport
alluvium Use: unconsolidated deposits
altimetry measurement
amphibians
anatomy and physiology
animal behavior
animal distribution Use: biogeography
animal tagging Use: plant and animal tagging
animal testing Use: plant and animal testing
animal tracking
animals
annelids Use: segmented worms
anoxia Use: oxygen content (water)
anthracite resources Use: coal resources
anthropogenic contamination
aquaculture
aquatic biology
aquatic ecosystems
arachnids
archaea
arthropods
asthenosphere
atmospheric and climatic processes
atmospheric circulation
atmospheric composition
atmospheric deposition (chemical & particulate)
atmospheric properties
atmospheric sciences
atomic absorption analysis
AVHRR
AVHRR images Use: AVHRR

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cadastral and legal land descriptions
cadastral maps Use: cadastral and legal land descriptions
calcareous nannoplankton
camera tows Use: underwater photography
capturing (animals)
carbon cycling
carbon isotope analysis
carbon-14 analysis
careers in science Use: scientific careers
carnivores
cartography
cell biology
chemical analysis
chemical oceanography Use: marine chemistry
chemistry (Earth sciences) Use: geochemistry
chemistry (life sciences) Use: biochemistry
chloride concentration Use: salinity
chromatography
chronostratigraphy Use: geologic history
circulation (lake) Use: lake circulation
circulation (ocean) Use: ocean circulation
circulation (water) Use: water circulation
clay deposits
cleavage (rock) Use: fracture (geologic)
climate Use: atmospheric and climatic processes
climate change
climatic change Use: climate change
climatology
coal bed methane resources Use: coalbed methane resources
coal resources
coalbed methane resources
coastal ecosystems
coastal fisheries Use: marine fishery resources
coastal fishing Use: marine fishery resources
coelenterates
collection of specimens Use: specimen collecting
colonization (organisms) Use: dispersal (organisms)
commerce Use: business and economics
commercial fishery resources
commercial water use
community ecology
computational methods
computer science
coniferous forests ecosystems Use: forest ecosystems
conodonts
conservation Use: natural resource management
consumers (organisms)
contacts (geologic) Use: geologic contacts
contaminant transport
contaminants (anthropogenic) Use: anthropogenic contamination
contaminants (natural) Use: natural contaminants
continental lithosphere
controlled fires
controlled flooding
coordinate systems Use: map coordinate systems
coral reef ecosystems Use: reef ecosystems
corals Use: coelenterates
core (Earth)
core analysis
core sampling Use: drilling and coring
coring Use: drilling and coring
correlation Use: regression analysis
crenulation (geologic) Use: folding (geologic)
crust (Earth)
crustaceans
cryology Use: glaciology
CTD measurement
culture and demographics
culturing (specimens)
Curie temperature analysis
cyclones Use: hurricanes
cytology Use: cell biology

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data management Use: information management methods
deciduous forest ecosystems Use: forest ecosystems
decision support methods
decomposers
decomposition (organic) Use: biogeochemical cycling
deep sea fisheries Use: marine fishery resources
deep sea fishing Use: marine fishery resources
demographics Use: culture and demographics
deposition (sediment) Use: sedimentation
depth-to maps Use: structure contours
desert ecosystems
desertification
developmental biology
diagenesis
diatoms
digital cartography Use: cartography
dinoflagellates
dinosaurs
disasters Use: hazards
disease Use: health and disease
disease (human) Use: environmental health (human)
disease vectors
dispersal (organisms)
dissolved oxygen Use: oxygen content (water)
distribution of animals Use: biogeography
distribution of plants Use: biogeography
distribution of species Use: biogeography
diversity (biological) Use: biodiversity
DNA sequencing
domestic water use
dowsing Use: natural resource exploration
drilling and coring
drinking water Use: drinking water use
drinking water use
droughts
dynamic geology Use: tectonic processes

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Earth characteristics
Earth history
Earth materials maps Use: engineering geology
Earth sciences
Earth structure
earthquake activity maps Use: earthquake occurrences
earthquake epicenter maps Use: earthquake probabilities
earthquake forecasting Use: earthquake probabilities
earthquake hazards Use: earthquakes, hazards
earthquake monitoring Use: seismic networking
earthquake occurrence maps Use: earthquake occurrences
earthquake occurrences
earthquake prediction Use: earthquake probabilities
earthquake preparedness
earthquake probabilities
earthquake seismology Use: earthquake occurrences, seismology
earthquakes
echinoderms
echo sounding Use: sonar methods
ecologic succession Use: succession (biological)
ecological competition
ecological models Use: ecological processes
ecological processes
ecology
economic geology
economics Use: business and economics
ecosystem diversity
ecosystem functions
ecosystem management
ecosystem monitoring
ecosystem services Use: ecosystem functions
ecosystems
ecotoxicology
El Nino Use: ocean-atmosphere interaction
electrical resistivity logging
electromagnetic surveying
electron microscopy
electrophoresis
embryology Use: developmental biology
emergency management resources Use: hazards
endangered species
endemic species
endocrinology
energy sources (nonrenewable) Use: nonrenewable energy resources
energy sources (renewable) Use: renewable energy resources
engineering geology
engineering geology maps Use: engineering geology
engineering sciences
engineering seismology Use: engineering sciences, seismology
entomology
environmental analysis Use: environmental assessment
environmental assessment
environmental hazards Use: hazards
environmental health (human)
environmental impact assessment Use: environmental assessment
environmental management Use: natural resource management
environmental planning Use: natural resource management
environmental pollutants Use: anthropogenic contamination, natural contaminants
environmental processes Use: ecological processes
environmental toxicology Use: ecotoxicology
eolian sediments Use: unconsolidated deposits
erosion
estuarine circulation Use: estuarine ecosystems, water circulation
estuarine currents Use: estuarine ecosystems, water circulation
estuarine ecosystem functions Use: ecosystem functions, estuarine ecosystems
estuarine ecosystems
eutrophication
exotic species Use: nonindigenous species
exploration Use: natural resource exploration
exploration seismology Use: natural resource exploration, seismology
extinction and extirpation
extirpation Use: extinction and extirpation

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farming Use: agriculture and farming
faunal and floral census
ferns and fern allies
field experiments
field inventory and monitoring
field methods
field monitoring Use: field inventory and monitoring
field observation Use: field inventory and monitoring
field sampling
fire preparedness Use: fires, hazard preparedness
fires
fires (controlled) Use: controlled fires
fires (uncontrolled) Use: fires
fish
fish farming Use: aquaculture
fish inventories Use: field sampling, fish
fishery management
fishery resources
fishes Use: fish
fission-track dating
fission-track method Use: fission-track dating
flatworms
flood preparedness Use: floods, hazard preparedness
flooding (controlled) Use: controlled flooding
floods
floral census Use: faunal and floral census
flow cytometry
flowering plants
fluid migration Use: groundwater flow
folding (geologic)
foliation (geologic)
food chain Use: food web
food cycle Use: food web
food web
foraminifera Use: protists
foreign species Use: nonindigenous species
forest ecosystems
forest resources
forestry Use: forest resources
fossils
fracture (geologic)
freshwater (ground) Use: groundwater
freshwater (surface) Use: surface water (non-marine)
freshwater ecosystems
fungi

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game management
game species
gamma-ray logging
gamma-ray spectrometric surveying Use: aeroradiometric surveying
gas chromatography
gas hydrate resources
gem resources
gemology Use: mineralogy
gene sequencing Use: DNA sequencing
genetic diversity
genetics
geochemical anomaly maps Use: geochemistry
geochemical processes
geochemical surveys Use: chemical analysis
geochemistry
geochronology
geodesy
geographic boundaries Use: administrative and political boundaries
geographic coordinate systems Use: map coordinate systems
geographic information sciences Use: geography
geographic information systems (GIS)
geography
geohistory Use: geologic history
geohydrology Use: hydrogeology
geolocation measurement
geologic and hydrologic processes
geologic contacts
geologic formations Use: bedrock geologic units
geologic hazards Use: hazards
geologic history
geologic maps Use: geology
geologic sections Use: stratigraphic sections
geologic structure
geologic units Use: stratigraphic sections
geological oceanography Use: marine geology
geology
geomagnetic field Use: magnetic field (Earth)
geomagnetics Use: magnetic field (Earth)
geomagnetism Use: magnetic field (Earth)
geomorphology
geophysical maps Use: geophysics
geophysics
geosciences Use: Earth sciences
geospatial analysis
geostatistics Use: statistical analysis
geotechnical properties maps Use: engineering geology
geothermal resources
geothermics Use: heat flow (Earth)
GIS Use: geographic information systems (GIS)
glacial geology Use: glaciology
glaciation
glaciers Use: snow and ice cover
glaciology
global change
global climate change Use: climate change
global positioning measurement Use: GPS measurement
global warming
gold ores
governmental units Use: administrative and political boundaries
GPS measurement
grain-size analysis
grainsize analysis Use: grain-size analysis
granulometry Use: grain-size analysis
grassland ecosystems
gravel deposits
gravitational field (Earth)
gravity Use: gravitational field (Earth)
gravity anomaly maps Use: gravitational field (Earth)
gravity field Use: gravitational field (Earth)
gray water Use: wastewater use
greenhouse gases
grey water Use: wastewater use
grid coordinate systems Use: map coordinate systems
ground motion maps Use: earthquake occurrences
ground water Use: groundwater
ground-water flow Use: groundwater flow
ground-water quality Use: groundwater quality
groundwater
groundwater flow
groundwater flow modeling Use: groundwater flow, mathematical modeling
groundwater geology Use: hydrogeology
groundwater movement Use: groundwater flow
groundwater quality
gymnosperms

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habitat alteration
habitat destruction Use: habitat alteration
habitat fragmentation Use: habitat alteration
habitats
hand-held field spectroscopy Use: handheld field spectroscopy
handheld field spectroscopy
hardness (water) Use: water hardness
harmful algal blooms Use: algal blooms, hazards
hazard preparedness
hazards
health (human) Use: environmental health (human)
health and disease
heat flow (Earth)
heatflow (Earth) Use: heat flow (Earth)
herbicide contaminants Use: pesticide and herbicide contamination
herbivores
heredity Use: genetics
herpetology
histology
horizontal datums Use: map coordinate systems
horseshoe crabs
horticulture Use: agriculture and farming
human disease Use: environmental health (human)
human environmental safety
human health Use: environmental health (human)
human impacts
hurricanes
hydraulic engineering
hydraulic models Use: hydraulic engineering
hydraulics Use: hydraulic engineering
hydroelectric power generation water use Use: power generation water use
hydrogeology
hydrographic sections Use: hydrogeology
hydrologic maps Use: hydrology
hydrologic processes Use: geologic and hydrologic processes
hydrology
hydrosphere Use: water resources
hydrothermal processes
hyperspectral imaging
hypoxia Use: oxygen content (water)
hysteresis Use: magnetic hysteresis analysis

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jellyfish Use: coelenterates
jointing (geologic) Use: fracture (geologic)

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La Nina Use: ocean-atmosphere interaction
laboratory methods
laboratory-induced magnetization analysis
lake circulation
lake ecosystems Use: freshwater ecosystems
land partitioning systems Use: cadastral and legal land descriptions
land subsidence
land subsidence maps Use: land subsidence
land surface characteristics
land surveying
land use and land cover
land use change
Landforms
Landsat images Use: multispectral imaging
landslide inventory maps Use: landslides
landslide maps Use: landslides
landslide preparedness Use: hazard preparedness, landslides
landslide susceptibility assessment
landslide susceptibility maps Use: landslide susceptibility assessment
landslides
leaching (analytical method) Use: chemical analysis
legal land descriptions Use: cadastral and legal land descriptions
lepidoptera Use: butterflies and moths
lichens
LIDAR
LIDAR images Use: LIDAR
life sciences
LIght Detection and Ranging (LIDAR) Use: LIDAR
light stable isotope analysis
light stable-isotope analysis Use: light stable isotope analysis
lignite resources Use: coal resources
limnology
lineament maps Use: lineation (geologic)
lineaments Use: lineation (geologic)
lineation (geologic)
liquefaction
liquid chromatography
lithification Use: geologic and hydrologic processes
lithologic maps Use: rocks and deposits
lithology Use: rocks and deposits
lithosphere
lithostratigraphy
liverworts and hornworts
livestock water use Use: agricultural water use
location measurement Use: geolocation measurement
long-term ecological monitoring

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macroinvertebrates
magnetic anomaly maps Use: magnetic field (Earth)
magnetic field Use: magnetic field (Earth)
magnetic field (Earth)
magnetic hysteresis analysis
magnetic surveying Use: aeromagnetic surveying, electromagnetic surveying
magnetic susceptibility analysis
magnetosphere Use: magnetic field (Earth)
magnetotelluric sounding Use: electromagnetic surveying
malacology Use: zoology
mammalogy
mammals
managed fires Use: controlled fires
managed flooding Use: controlled flooding
management methods
mantle (Earth)
map coordinate systems
map making Use: cartography
map projections Use: map coordinate systems
mapmaking Use: cartography
mapping Use: cartography
marine biology
marine chemistry
marine ecosystems
marine fishery resources
marine geology
marine geophysics
marine water quality
marsh ecosystems Use: wetland ecosystems
marshland ecosystems Use: wetland ecosystems
mass spectroscopy
mathematical methods Use: computational methods
mathematical modeling
mathematical simulation
mercury contamination
meristics
metadata development
metallic ores
metamorphic rocks
metamorphism (biological)
metamorphism (geological)
meteor impacts Use: hazards, meteorites
meteorite impacts Use: hazards, meteorites
meteorites
meteorology
meteors Use: meteorites
methane resources (coalbed) Use: coalbed methane resources
methods
microbiology
micropaleontology
microscope methods Use: microscopy
microscopy
microtomy
microwave imaging
migration (organisms)
migratory species
mineral resources
mineralogical analysis Use: chemical analysis
mineralogy
minerals Use: mineral resources
mining and quarrying
mining hazards
mining water use
mixed forest ecosystems Use: forest ecosystems
mixed grass ecosystems Use: grassland ecosystems
modeling (mathematical) Use: mathematical modeling
molecular biology
mollusks
morphology (biological)
morphometrics Use: meristics
mosses
moths Use: butterflies and moths
mudflows Use: landslides
multispectral imaging
multivariate statistical analysis
mycology

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paleobotany
paleoceanography
paleomagnetic analysis
paleontology
paleoseismology
paleotectonic maps Use: tectonic processes
paleozoology Use: paleontology
palynology
panchromatic imaging
parasitology
particle-beam spectroscopy
particle-size analysis Use: grain-size analysis
pathobiology Use: pathology
pathology
pedology (soils) Use: soil sciences
pesticide and herbicide contamination
petrography
petroleum resources (gas) Use: natural gas resources
petroleum resources (oil) Use: oil resources
petrology
pH (water) Use: water pH
phosphorus content Use: nutrient content (water)
photogrammetry Use: remote sensing
photographs Use: photography
photography
phycology
phylogeny Use: paleontology
physical oceanography Use: ocean sciences
physiology Use: anatomy and physiology
plains ecosystems Use: grassland ecosystems
planetary bodies
planetary sciences
planetology Use: planetary sciences
plankton
planktonic ecosystems Use: aquatic ecosystems, plankton
plant and animal tagging
plant and animal testing
plant distribution Use: biogeography
plants (organisms)
plate tectonics Use: tectonic processes
plot sampling
political boundaries Use: administrative and political boundaries
pollination
pollinators
pollutants Use: anthropogenic contamination
pollution
polymerase chain reaction
pond ecosystems Use: freshwater ecosystems
population and community ecology
population dynamics
population energetics Use: population and community ecology
power generation water use
prairie ecosystems Use: grassland ecosystems
precipitation (atmospheric)
precipitation measurements Use: field inventory and monitoring, precipitation (atmospheric)
predators Use: carnivores
producers (organisms)
prospecting Use: natural resource exploration
protists
protozoans Use: protists
public water supply Use: domestic water use

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quadrangle maps Use: topography
quarrying Use: mining and quarrying

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radar imaging
radio telemetry Use: telemetry
radioactive waste repositories Use: waste treatment and disposal
radioisotope tagging Use: plant and animal tagging
radiolaria Use: protists
radiometric age determination Use: radiometric dating
radiometric dating
radon
rain Use: precipitation (atmospheric)
rainfall Use: precipitation (atmospheric)
rainfall measurements Use: field inventory and monitoring, precipitation (atmospheric)
rangeland ecosystems Use: terrestrial ecosystems
Rb-Sr age analysis Use: rubidium-strontium age analysis
re-establishment (organisms) Use: reintroduction (organisms)
reaches (hydraulic) Use: river reaches
reaches (streams) Use: river reaches
reclamation Use: remediation
recolonization (organisms) Use: reintroduction (organisms)
reconnaissance Use: field inventory and monitoring
recreational fishery resources
recreational fishing Use: recreational fishery resources
red tides Use: algal blooms
reef ecosystems
reef fisheries Use: marine fishery resources
reef fishing Use: marine fishery resources
regression analysis
reintroduction (organisms)
relative abundance analysis
relief maps Use: topography
remediation
remote sensing
remote video monitoring Use: video monitoring
remote-sensing data Use: remote sensing
remote-sensing images Use: remote sensing
renewable energy resources
renewable resources
reptiles
residential water use Use: domestic water use
resistivity sounding Use: electrical resistivity logging
resource conservation Use: natural resource management
resource extraction Use: natural resource extraction
resource restoration Use: natural resource management
restoration Use: remediation
revegetation Use: bioremediation
riparian ecosystems Use: wetland ecosystems
risk assessment
river discharge
river discharge monitoring Use: field inventory and monitoring, river discharge
river ecosystems Use: freshwater ecosystems, river systems
river reaches
river systems
rock composition Use: rocks and deposits
rock mechanics maps Use: engineering geology
rocks and deposits
roundworms
rubidium-strontium age analysis

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safety issues (human) Use: human environmental safety
salinity
sand deposits
satellite altimetry Use: altimetry measurement, remote sensing
satellite imaging Use: remote sensing
scanning electron microscopy
Scanning Multichannel Microwave Radiometer (SMMR) Use: SMMR
sciences
scientific careers
scientific instruments Use: instrument design and development
scientists-at-work photographs Use: scientific careers
scrubland ecosystems Use: shrubland ecosystems
sea anemones Use: coelenterates
sea floor characteristics
sea floor topography Use: bathymetry
sea surface temperature
sea-level change
seafloor characteristics Use: sea floor characteristics
seasonal migration Use: migration (organisms)
sections (geologic) Use: stratigraphic sections
sections (stratigraphic) Use: stratigraphic sections
sediment transport
sedimentary rocks
sedimentation
sedimentology
segmented worms
seismic exploration Use: natural resource exploration, seismic methods
seismic hazard maps Use: earthquake occurrences
seismic imaging Use: seismic methods
seismic methods
seismic networking
seismic profiles Use: seismic methods
seismic reflection method
seismic reflection survey maps Use: seismic reflection method
seismic refraction method
seismicity distribution maps Use: earthquake probabilities
seismograms Use: seismic methods
seismology
seismometry Use: seismic methods
sewage disposal Use: waste treatment and disposal
sexing (plants & animals)
shaking maps (seismic) Use: earthquake occurrences
shellfish
shorebirds Use: birds
short grass ecosystems Use: grassland ecosystems
shrubland ecosystems
Side-Looking Airborne Radar (SLAR) Use: SLAR
side-scan sonar methods
sieve-size analysis
SLAR
slides (land) Use: landslides
slope stability Use: landslide susceptibility assessment
slope stability maps Use: landslide susceptibility assessment
SMMR
SMMR images Use: SMMR
snow Use: precipitation (atmospheric)
snow and ice cover
snowfall Use: precipitation (atmospheric)
snowfall measurements Use: field inventory and monitoring, precipitation (atmospheric)
social sciences
socioeconomics Use: culture and demographics
soil chemistry
soil pollution Use: pollution, soil resources
soil resources
soil sciences
sonar depth-sounding Use: sonar methods
sonar methods
space-borne sensing Use: remote sensing
spatial analysis
Special Sensor Microwave/Imager (SSM/I) Use: SSM/I
species distribution Use: biogeography
species distribution maps Use: biogeography
species diversity
species geographic range Use: biogeography
specimen collecting
spiders Use: arachnids
sponges
sport fishing Use: recreational fishery resources
spring ecosystems Use: freshwater ecosystems
SSM/I
SSM/I images Use: SSM/I
statistical analysis
storms
stratigraphic sections
stratigraphy
stream current Use: streamflow
stream current monitoring Use: streamflow monitoring
stream ecosystems Use: freshwater ecosystems
stream flow Use: streamflow
stream flow monitoring Use: streamflow monitoring
stream gage monitoring Use: streamflow monitoring
stream-flow monitoring Use: streamflow monitoring
stream-gage monitoring Use: streamflow monitoring
streamflow
streamflow data Use: streamflow
streamflow modeling Use: mathematical modeling, streamflow
streamflow monitoring
structural geology
structure contours
subbituminous coal resources Use: coal resources
subsistence fishery resources
subsurface maps Use: geology
succession (biological)
surface water (non-marine)
surface water quality
surficial geologic maps Use: surficial geologic units
surficial geologic units
surveying Use: land surveying
suspended material (water)
systematics and taxonomy

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tagging Use: plant and animal tagging
taiga ecosystems Use: forest ecosystems
tall grass ecosystems Use: grassland ecosystems
taphonomy Use: paleontology
taxonomy Use: systematics and taxonomy
tectonic maps Use: tectonic processes
tectonic processes
tectonics Use: tectonic processes
tectonophysics
telemetry
temperature (air) Use: air temperature
temperature (ocean) Use: ocean temperature
temperature (sea surface) Use: sea surface temperature
temperature (water) Use: water temperature
temperature analysis (Curie) Use: Curie temperature analysis
terrestrial ecosystems
thematic mapper Use: multispectral imaging
therapeutic methods
thermal imaging
thermoelectric power generation water use Use: power generation water use
thickness maps Use: structure contours
thin section analysis Use: petrography
tidal waves Use: tsunamis
tides
tiltmeter measurement
time series analysis
tool development Use: instrument design and development
topics
topographic maps Use: topography
topography
topological analysis
tornadoes
toxic radionuclides (natural)
toxic trace elements (natural)
toxicology Use: ecotoxicology
trace fossils Use: ichnofossils
tracking Use: animal tracking
transect sampling
trapping (animals) Use: capturing (animals)
tree ring analysis
trenching
trilobites
tritium analysis
trophic level dynamics Use: food web
trophic relationships Use: food web
tsunami preparedness Use: hazard preparedness, tsunamis
tsunamis
tundra ecosystems
typhoons Use: hurricanes

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