nat  search
Natal South Africa  search
USEKwaZulu-Natal South Africa
Natchitoches Parish Louisiana  search
BTUnited States
 .Louisiana
 ..Natchitoches Parish Louisiana
Naticidae  search
BTInvertebrata
 .Mollusca
 ..Gastropoda
 ...Naticidae
SNFamily.
national  search
National Aeronautics and Space Administration  search
USENASA
National Coal Resources Data System  search
UFNCRDS
RTUnited States
 coal
 data bases
SNAdded to Thesaurus in 1985.
national forests  search
BTpublic lands
 .national forests
RTland use
 conservation
 Coronado National Forest
 forests
 Teton National Forest
national monuments  search
BTpublic lands
 .national monuments
RTnational parks
 Badlands National Park
 Craters of the Moon
 Marble Canyon
 Death Valley
 Dinosaur National Monument
 White Sands
 wilderness areas
 Glacier Bay National Park
 Katmai National Park
 Pinnacles National Monument
SNAdded to Thesaurus in 1989.
National Oceanic and Atmospheric Administration  search
USENOAA
national parks  search
BTpublic lands
 .national parks
RTDenali National Park
 conservation
 Arches National Park
 Badlands National Park
 Banff National Park
 Bialowieza
 Big Bend National Park
 Canyonlands National Park
 Grand Canyon
 Fiordland National Park
 Glacier Bay National Park
 Glacier National Park
 Grand Teton
SNAdded to Thesaurus in 1985.
National Petroleum Reserve Alaska  search
BTUnited States
 .Alaska
 ..Northern Alaska
 ...National Petroleum Reserve Alaska
UFNational Petroleum Reserve in Alaska
 NPRA
RTNorth Slope
SNNorth Slope, N Alaska.
National Petroleum Reserve in Alaska  search
USENational Petroleum Reserve Alaska
national policy  search
USEpublic policy
National Science Foundation  search
USENSF
National Uranium Resource Evaluation Program  search
USENURE
National Water Data Exchange  search
USENAWDEX
National Water Information System-II  search
USENWIS-II
National Water-Quality Assessment Program  search
USENAWQA
native elements  search
NTcarbonado
 chaoite
 diamond
 graphite
 lonsdaleite
RTalloys
 antimony
 antimony ores
 arsenic
 arsenic ores
 bismuth
 bismuth ores
 copper
 copper ores
 gold
 gold ores
 iron
 iron ores
 mercury
 mercury ores
 metal ores
 metals
 minerals
 nonmetal deposits
 nonmetals
 silver
 silver ores
 sulfur
 sulfur deposits
SNBefore 1981, search native elements and alloys. As of 1981, minerals that were classified under native elements and alloys are included here or under alloys.
native elements and alloys  search
SNAs of 1981, no longer a valid term for GeoRef. Use native elements or alloys as applicable.
natrium  search
USEsodium
natroalunite  search
BTsulfates
 .natroalunite
UFalmeriite
RTalunitization
natroborocalcite  search
USEulexite
natrolite  search
BTsilicates
 .framework silicates
 ..zeolite group
 ...natrolite
Natrona County Wyoming  search
BTUnited States
 .Wyoming
 ..Natrona County Wyoming
NTCasper Wyoming
RTRattlesnake Hills
 Casper Mountain
 Gas Hills
 Granite Mountains
 Teapot Dome
SNCentral Wyoming.
natural  search
SNA valid index term through 1977.
natural analogs  search
UFanalogs, natural
 analogues, natural
RTmodels
 modern analogs
 homology
 interplanetary comparison
 terrestrial comparison
 systems analogs
SNAlso search natural reactors if applicable. See comparison. Added to Thesaurus in 1995.
natural bridges  search
USEnatural curiosities
natural coke  search
USEcoke coal
natural curiosities  search
UFnatural bridges
RTbridges
 geomorphology
 erosion features
 popular geology
 solution features
SNAdded to Thesaurus in 1981.
natural dams  search
BTdams
 .natural dams
NTice dams
RTgeomorphology
 geologic hazards
 mass movements
SNAlso search specific material such as debris flows, landslides, lava. Added to Thesaurus in 1995.
natural gas  search
BTpetroleum
 .natural gas
NTcoalbed methane
RThydrocarbons
 offshore
 Eastern Gas Shales Project
 energy sources
 gas hydrates
 gases
 Karachaganak Field
 clathrates
 degasification
 methane
 gas seeps
 condensates
 gas sands
 giant fields
 hydrogen sulfide
 gas storage
 gas-water interface
 gasification
 oil and gas
SNBefore 1977, also search natural AND gas. See list A for searching category codes. Commodity. See List C.
Natural History Museum of London  search
USEBritish Museum
natural materials  search
RTmaterials
 synthetic materials
SNUsed with minerals only to distinguish from synthetic materials. It is not used for natural materials which are rocks, sediments, isotopes, or commodities. Added to Thesaurus in 1968.
natural recharge  search
RTartificial recharge
 ground water
 recharge
SNAdded to Thesaurus in 1982.
natural remanence  search
USEnatural remanent magnetization
natural remanent magnetism  search
USEnatural remanent magnetization
natural remanent magnetization  search
BTmagnetization
 .remanent magnetization
 ..natural remanent magnetization
UFnatural remanence
 natural remanent magnetism
 NRM
RTpaleomagnetism
 magnetic field
 characteristic remanent magnetization
 remagnetization
natural resources  search
RTconservation
 depletion
 endangered species
 environmental geology
 geologic sites
 land cover maps
 land management
 land use
 public lands
 rain forests
 reclamation
 Resource Conservation and Recovery Act
 resources
 utilization
 wilderness areas
natural selection  search
Naturaliste Plateau  search
BTIndian Ocean
 .Naturaliste Plateau
RTLeg 28
 Leg 26
 DSDP Site 258
 DSDP Site 264
SNSE Indian ocean off SW Australia. Added to Thesaurus in 1995.
naturally fractured reservoirs  search
RTfractures
 fracturing
 petroleum
 petroleum engineering
 reservoir properties
 reservoir rocks
 reservoirs
SNSometimes difficult to determine. Also search (reservoir rocks OR subsurface reservoirs OR reservoirs OR reservoir properties) AND (petroleum OR natural gas OR geothermal energy, as applicable) AND fractures. Added to Thesaurus in 1989.