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- GabbroCoarse-grained mafic intrusive rock
- Gable Creek FormationGeologic formation in Oregon, United States
- GachetáGachetá, Cundinamarca is a municipality and town of Colombia, capital of the Guavio Provin
- GadoliniteNesosilicate mineral
- Gaia hypothesisScientific hypothesis about Earth
- Gakkel RidgeMid-oceanic ridge under the Arctic Ocean
- Galápagos hotspotPacific volcanic hotspot
- GaleStrong wind
- Gale of January 1976Extratropical cyclone and storm surge
- Gale warningWeather forecast including a warning of a gale-force winds
- GalenaNatural mineral form of lead sulfide
- Gales Creek (Oregon)Gales Creek, is a tributary, 23.5 miles (37.8 km) long, of the Tualatin River in Washingto
- Gan RiverThe Gan River (Chinese: 赣江; pinyin: Gàn Jiāng, Gan: Kōm-kong) runs north through the weste
- Gangdese batholithThe Gangdese batholith or Gangdese volcanic arc is a major geological structure in the sou
- GangueCommercially worthless material that surrounds a wanted mineral in ore
- Ganigobis FormationGeological formation in Southern Africa
- Gansu ultramarathon disasterFatal 2021 marathon event in China
- Garbage patchGyre of marine debris
- Garden slender salamanderThe Garden slender salamander (Batrachoseps major) or Southern California slender salamand
- Garibaldi NévéThe Garibaldi Névé is a snowfield in the Pacific Ranges of the Coast Mountains in southwes
- GarnetMineral, semi-precious stone
- GarrotxaGarrotxa (Catalan pronunciation: ) is a comarca (county) in the Girona region, Catalonia,
- Garth tsunamiSuspected prehistoric tsunami in Scotland
- Gas flareSafety device for burning off flammable gas
- Gas in TurkeyProduction, transport and consumption of gases such as methane in Turkey
- Gas leakUnintended escape of gas from a pipeline or other containment
- Gas ventingDisposal of unwanted methane gas from fossil fuels
- Gascoyne ComplexGranite and metamorphic rock in Western Australia
- Gasoline and diesel usage and pricingThe usage and pricing of gasoline (or petrol) results from factors such as crude oil price
- GaussbergGaussberg (or Schwarzen Berg, Mount Gauss) is an extinct, 370-metre-high (1,210-foot) high
- Gavin Pretor-PinneyGavin Edmund Pretor-Pinney is a British author, known for his books The Cloudspotter's Gui
- Gavin SchmidtBritish climatologist and mathematician
- Gaviota State ParkGaviota State Park is a state park of California, United States. It is located in southern
- Gdańsk BayBay located in the Baltic Sea
- GelaComune in Sicily, Italy
- GelasianEarliest subdivision of the Quaternary Period
- GemologyScience dealing with natural and artificial gemstone materials
- GemstonePiece of mineral crystal used to make jewelry
- General Bathymetric Chart of the OceansPublicly available bathymetric chart of the world's oceans
- General Roca, Río NegroGeneral Roca is a city in the northeast of the Argentine province of Río Negro, northern P
- Genoa lowWeather phenomenon in Northern Italy
- Geo URI schemeSystem of geographic location identifiers
- GeoarchaeologyArchaeological sub-discipline
- GeobiologyStudy of interactions between Earth and the biosphere
- Geobiology (journal)Geobiology is a peer-reviewed scientific journal of geobiology published by Wiley-Blackwel
- Geobiology (pseudoscience)Geobiology is a field which studies the effects of the Earth's radiation, such as telluric
- Geochemical cyclePathway that chemical elements take in the surface and crust of the Earth
- Geochemical SocietyThe Geochemical Society is a nonprofit scientific organization founded to encourage the ap
- GeochemistryScience that applies chemistry to analyze geological systems
- Geochemistry of carbonStudy of the transformations involving carbon within the systems of the Earth
- GeochronologyScience of determining the age of rocks, sediments and fossils
- GeodeHollow formation inside a rock
- Geodesic gridSpatial grid based on a geodesic polyhedron
- GeodesyScience of measuring the shape, orientation, and gravity of Earth
- Geodetic coordinatesGeographic coordinate system
- GeodiversityGeodiversity is the variety of earth materials, forms and processes that constitute and sh
- GeodynamicsStudy of dynamics of the Earth
- Geodynamics of terrestrial exoplanetsField of study
- GeoengineeringDeliberate and large-scale intervention in Earth's climate system
- Geographic coordinate conversionIn geodesy, conversion among different geographic coordinate systems is made necessary by
- Geographical distanceDistance measured along the surface of the Earth
- Geography of KarnatakaThe Indian State of Karnataka is located between 11°30' North and 18°30' North latitudes a
- Geography of North KoreaNorth Korea is located in East Asia in the Northern half of Korea, partially on the Korean
- Geography of the North SeaThe geography of the North Sea studies coastal and submarine features as well as the peopl
- Geologic provinceSpatial entity with common geologic attributes
- Geologic recordEntirety of the layers of rock strata
- Geologic temperature recordVery long term changes in Earth's temperature
- Geologic time scaleSystem that relates geologic strata to time
- Geological compassType of compass
- Geological Evidences of the Antiquity of ManBook by Charles Lyell
- Geological formationFundamental unit of lithostratigraphy
- Geological hazardGeological state that may lead to widespread damage or risk
- Geological history of EarthThe geological history of Earth follows the major geological events in Earth's past based
- Geological history of North AmericaThe geological history of North America comprises the history of geological occurrences an
- Geological history of oxygenAlthough oxygen is the most abundant element in Earth's crust, due to its high reactivity
- Geological mapSpecial-purpose map to show geological features
- Geological mapping of Georgia (U.S. state)Geological mapping of Georgia is the creation of geological maps—special-purpose maps made
- Geological modellingApplied science of creating computerized representations of portions of the Earth's crust
- Geological Museum after H. KarapetyanMuseum in Yerevan, Armenia
- Geological Society of AmericaNonprofit organization dedicated to geoscience
- Geological Society of LondonLearned society
- Geological structure of Great BritainOverview of geological structures in Britain
- Geological surveyInvestigation of the geology in a region for creating a geological map
- Geological Survey of CanadaCanadian government agency
- Geological Survey of JapanThe Geological Survey of Japan (地質調査総合センター, Chishitsu chōsa sōkō sentā) (GSJ) is a researc
- Geological Survey of NorwayNorwegian government agence
- GeologistScientist who studies geology
- GeologyScientific study of Earth's physical composition
- Geology (journal)Geology is a peer-reviewed publication of the Geological Society of America (GSA). GSA sta
- Geology and geological history of CaliforniaThe geology of California is highly complex, with numerous mountain ranges, substantial fa
- Geology of AlabamaThe geology of Alabama is marked by abundant geologic resources and a variety of geologic
- Geology of Alderley EdgeHill in Cheshire, United Kingdom
- Geology of AngolaThe geology of Angola includes large areas of Precambrian age rocks. The west of the count
- Geology of AntarcticaGeologic composition of Antarctica
- Geology of ArmeniaGeology of the country of Armenia
- Geology of AustraliaThe geology of Australia includes virtually all known rock types, spanning a geological ti
- Geology of BangladeshThe Geology of Bangladesh is affected by the country's location, as Bangladesh is mainly a
- Geology of BoliviaThe geology of Bolivia comprises a variety of different lithologies as well as tectonic an
- Geology of BulgariaThe geology of Bulgaria consists of two major structural features. The Rhodope Massif in s
- Geology of Cape TownCape Town lies at the south-western corner of the continent of Africa. It is bounded to th
- Geology of CeresGeologic structure and composition of Ceres
- Geology of ChadThe terrain of Chad in central Africa is dominated by the low-lying Chad Basin (elevation
- Geology of ChileThe geology of Chile is a characterized by processes linked to subduction, such as volcani
- Geology of ChinaThe geology of China (or the geological structure of the People's Republic of China) consi
- Geology of ColombiaGeology of Colombia refers to the geological composition of the Republic of Colombia that
- Geology of CornwallGeology of English county
- Geology of DelawareThe geology of Delaware consists of two physiographic provinces located in the U.S. state
- Geology of EnglandThe geology of England is mainly sedimentary. The youngest rocks are in the south east aro
- Geology of EthiopiaThe geology of Ethiopia includes rocks of the Neoproterozoic East African Orogeny, Jurassi
- Geology of EuropeThe geology of Europe is varied and complex, and gives rise to the wide variety of landsca
- Geology of FinlandThe geology of Finland is made up of a mix of geologically very young and very old materia
- Geology of Georgia (U.S. state)The U.S. state of Georgia is commonly divided into four geologic regions that influence th
- Geology of GermanyThe geology of Germany is heavily influenced by several phases of orogeny in the Paleozoic
- Geology of GotlandThe geology of Gotland is made up of a sequence of sedimentary rocks of a Silurian age, di
- Geology of Great BritainThe geology of Great Britain is renowned for its diversity. As a result of its eventful ge
- Geology of GreenlandGreenland is the largest island on Earth. Only one-fifth of its surface area is exposed be
- Geology of IcelandThe geology of Iceland is unique and so of particular interest to geologists. Iceland lies
- Geology of IraqThe geology of Iraq includes thick sequences of marine and continental sedimentary rocks o
- Geology of JapanThe islands of Japan are primarily the result of several large ocean movements occurring o
- Geology of KansasThe geology of Kansas encompasses the geologic history and the presently exposed rock and
- Geology of MadagascarThe geology of Madagascar comprises a variety of rocks of Precambrian age which make up th
- Geology of MassachusettsGeology of U.S. state
- Geology of MinnesotaThe geology of Minnesota comprises the rock, minerals, and soils of the U.S. state of Minn
- Geology of MyanmarThe geology of Myanmar is shaped by dramatic, ongoing tectonic processes controlled by shi
- Geology of NamibiaThe geology of Namibia encompasses rocks of Paleoproterozoic, Mesoproterozoic and Neoprote
- Geology of NepalThe geology of Nepal is dominated by the Himalaya, the highest, youngest and a very highly
- Geology of New JerseyNew Jersey is a very geologically and geographically diverse region in the United States'
- Geology of New MexicoThe geology of New Mexico includes bedrock exposures of four physiographic provinces, with
- Geology of New South WalesGeologically the Australian state of New South Wales consists of seven main regions: Lachl
- Geology of New ZealandThe geology of New Zealand is noted for its volcanic activity, earthquakes and geothermal
- Geology of North AmericaThe geology of North America is a subject of regional geology and covers the North America
- Geology of NorwayThe geology of Norway encompasses the history of Earth that can be interpreted by rock typ
- Geology of PeruThe geology of Peru includes ancient Proterozoic rocks, Paleozoic and Mesozoic volcanic an
- Geology of RussiaThe geology of Russia, the world's largest country, which extends over much of northern Eu
- Geology of SaskatchewanThe geology of Saskatchewan can be divided into two main geological regions, the Precambri
- Geology of ScotlandThe geology of Scotland is unusually varied for a country of its size, with a large number
- Geology of ShropshireGeology of English county
- Geology of solar terrestrial planetsGeology of Mercury, Venus, Earth, Mars and Ceres
- Geology of SomalilandThe geology of Somaliland is very closely related to the geology of the rest of Somalia. B
- Geology of South KoreaThe geology of South Korea includes rocks dating to the Archean and two large massifs of m
- Geology of TennesseeThe geology of Tennessee is as diverse as its landscapes. Politically, Tennessee is broken
- Geology of the AlpsThe Alps form part of a Cenozoic orogenic belt of mountain chains, called the Alpide belt,
- Geology of the Antarctic PeninsulaThe Antarctic Peninsula, roughly 1,000 kilometres (650 mi) south of South America, is the
- Geology of the AppalachiansGeologic description of the Appalachian Mountains
- Geology of the Baltic SeaThe geology of the Baltic Sea is characterized by having areas located both at the Baltic
- Geology of the Bryce Canyon areaGeology of the area in Utah
- Geology of the Canary IslandsGeology of a Spanish archipelago in the Atlantic Ocean
- Geology of the Capitol Reef areaThe exposed geology of the Capitol Reef area presents a record of mostly Mesozoic-aged sed
- Geology of the Falkland IslandsThe geology of the Falkland Islands is described in several publications. The Falkland Isl
- Geology of the Grand Canyon areaAspect of geology
- Geology of the HimalayasOrigins and structure of the Himalayan Mountain range
- Geology of the Iberian PeninsulaGeology of peninsula in southwestern Europe
- Geology of the Isle of MullGeology of Scottish island
- Geology of the Isle of SkyeThe geology of the Isle of Skye in Scotland is highly varied and the island's landscape re
- Geology of the North SeaThe geology of the North Sea describes the geological features such as channels, trenches,
- Geology of the Northland RegionNew Zealand's Northland Region is built upon a basement consisting mainly of greywacke roc
- Geology of the Pacific NorthwestThe geology of the Pacific Northwest includes the composition (including rock, minerals, a
- Geology of the Pacific OceanThe Pacific Ocean evolved in the Mesozoic from the Panthalassic Ocean, which had formed wh
- Geology of the United StatesThe richly textured landscape of the United States is a product of the dueling forces of p
- Geology of the United States Virgin IslandsThe geology of the U.S. Virgin Islands includes mafic volcanic rocks, with complex mineral
- Geology of TurkeyThe geology of Turkey is the product of a wide variety of tectonic processes that have sha
- Geology of VictoriaGeology of Australia
- Geology of WalesThe geology of Wales is complex and varied; its study has been of considerable historical
- Geology of West SussexGeology of English county
- Geology of West VirginiaWest Virginia's geologic history stretches back into the Precambrian, and includes several
- Geology of ZimbabweThe geology of Zimbabwe in southern Africa is centered on the Zimbabwe Craton, a core of A
- Geomagnetic excursionChange in the Earth's magnetic field
- Geomagnetic polePoles of a best fit to the Earth's field
- Geomagnetic reversalReversal of direction of Earth's magnetic field
- Geomagnetic stormDisturbance of the Earth's magnetosphere
- Geomagnetically induced currentGround level manifestation of space weather
- GeomathematicsBranch of applied mathematics
- GeomicrobiologyIntersection of microbiology and geology
- GeomorphologyScientific study of landforms
- GeoneutrinoIn nuclear and particle physics, a geoneutrino is a neutrino or antineutrino emitted durin
- GeoparkProtected area with significant geology
- GeophoneA geophone is a device that converts ground movement (velocity) into voltage, which may be
- Geophysical fluid dynamicsDynamics of naturally occurring flows
- Geophysical Fluid Dynamics LaboratoryAmerican physics research center
- Geophysical Fluid Dynamics Laboratory Coupled ModelGeophysical Fluid Dynamics Laboratory Coupled Model (GFDL CM2.5) is a coupled atmosphere–o
- Geophysical imagingGeophysical imaging (also known as geophysical tomography) is a minimally destructive geop
- Geophysical MASINTGeophysical MASINT is a branch of Measurement and Signature Intelligence (MASINT) that inv
- Geophysical Research LettersGeophysical Research Letters is a biweekly peer-reviewed scientific journal of geoscience
- Geophysical surveySystematic collection of geophysical data for spatial studies
- GeophysicsPhysics of the Earth and its vicinity
- Georg August GoldfussGerman scientist (1782–1848)
- George Frederick KunzGeorge Frederick Kunz (September 29, 1856 – June 29, 1932) was an American mineralogist an
- George HadleyGeorge Hadley (12 February 1685 – 28 June 1768) was an English lawyer and amateur meteorol
- George Julius Poulett ScropeGeorge Julius Poulett Scrope FRS (10 March 1797 – 19 January 1876) was an English geologis
- Geospatial topologyGeospatial topology is the study and application of qualitative spatial relationships betw
- GeosphereCollective name for the lithosphere, the hydrosphere, the cryosphere, and the atmosphere
- Geostationary Operational Environmental SatelliteUS weather satellite series
- GeostatisticsBranch of statistics focusing on spatial data sets
- Geostrophic currentOceanic flow in which the pressure gradient force is balanced by the Coriolis effect
- Geostrophic windConcept in atmospheric science
- GeosynclineObsolete geological concept to explain orogens
- Geothermal activityActivity resulting from underground heat
- Geothermal explorationGeothermal exploration is the exploration of the subsurface in search of viable active geo
- Geothermal gradientRate of temperature increase with depth in Earth's interior
- Geothermal heatingUse of geothermal energy for heating
- GeothermobarometryHistory of rock pressure and temperature
- GeotourismTourism associated with geological attractions and destinations
- GeotracesInternational marine chemistry research programme
- Gerard C. BondGerard Clark Bond (May 20, 1940 – June 29, 2005) was an American geologist.
- German Climate Action Plan 2050German climate protection policy
- GeulhemGeulhem is a rural hamlet in the south-eastern Netherlands, part of the former Berg en Ter
- GeyserNatural explosive eruption of hot water
- Geysers on MarsMartian geysers (or CO2 jets) are putative sites of small gas and dust eruptions that occu
- GibbsiteForm of aluminium hydroxide, mineral
- Gibraltar ArcGeologic region of Iberia and north Africa
- Gilchrist, TexasGilchrist, Texas is an unincorporated residential community and beachfront resort along St
- Gill (ravine)A gill or ghyll is a ravine or narrow valley in the North of England and parts of Scotland
- Glacial erraticPiece of rock that has been moved by a glacier
- Glacial lakeLake formed by a melted glacier
- Glacial landformLandform created by the action of glaciers
- Glacial motionGeological phenomenon
- Glacial periodGeological era
- Glacial striationBedrock abrasions from glacier movement
- GlacierPersistent body of ice that moves downhill under its own weight
- Glacier caveCave formed within the ice of a glacier
- Glacier Loss DayIndicator for glacial loss
- Glacier National Park (U.S.)National park in Montana, United States
- GlaciologyScientific study of ice and natural phenomena involving ice
- Gladius (cephalopod)Bodypart of certain cephalopods
- GlancesGlance or glances (German: glanz, glanze), sometimes also galenoids (similar to galena) —
- Glasgow Climate PactInternational agreement
- GlauconitePhyllosilicate mineral in the dioctahedral mica group
- GlaucophaneInosilicate mineral
- Glaze (ice)Coating of ice on objects
- Glen Canyon GroupThe Glen Canyon Group is a geologic group of formations that is spread across the U.S. sta
- Glen Canyon National Recreation AreaProtected area in Arizona and Utah, US
- Glengary, West VirginiaGlengary is an unincorporated community situated in Back Creek Valley in Berkeley County,
- Glenwoody FormationThe Glenwoody Formation is a geological formation that is exposed in the cliffs southeast
- Global Atmosphere WatchThe Global Atmosphere Watch (GAW) is a worldwide system established by the World Meteorolo
- Global Boundary Stratotype Section and PointBoundary of a stage on the geologic time scale
- Global Carbon ProjectGlobal research project on greenhouse gas emissions
- Global Census of Marine Life on SeamountsGlobal scientific initiative
- Global Change Research Act of 19901990 United States climate change law
- Global Climate Action (portal)UN portal for tracking climate action
- Global coolingDiscredited 1970s hypothesis of imminent cooling of the Earth
- Global Covenant of Mayors for Climate & EnergyThe Global Covenant of Mayors for Climate & Energy (GCoM) was established in 2016 by bring
- Global dimmingReduction in the amount of sunlight reaching Earth's surface
- Global Ecosystem Dynamics InvestigationScientific space mission
- Global Energy MonitorAmerican non-governmental organization
- Global Facility for Disaster Reduction and RecoveryThe Global Facility for Disaster Reduction and Recovery (GFDRR) is a global partnership pr
- Global Faith Leaders COP28 Summit2023 interfaith summit to address climate change
- Global Historical Climatology NetworkDatabase of temperature, precipitation and pressure records
- Global Paleoclimate IndicatorsGlobal paleoclimate indicators are the proxies sensitive to global paleoclimatic environme
- Global Peatlands InitiativeThe Global Peatlands Initiative is an effort made by leading experts and institutions form
- Global stocktakeRegular report pursuant to the Paris Agreement
- Global surface temperatureAverage temperature of the Earth's surface
- Global terrestrial stillingObserved decrease in wind speed near Earth's surface since the 1980s
- Global Volcanism ProgramAmerican research program
- Global warming hiatusPeriod of little Earth temperature change
- Global warming potentialPotential heat absorbed by a greenhouse gas
- Global Warming Solutions Act of 2006California state law
- Global Water PartnershipThe Global Water Partnership (GWP) is an international network created to foster an integr
- Glorieta SandstoneThe Glorieta Sandstone is a geologic formation in New Mexico. It preserves fossils charact
- Glory (optical phenomenon)Halo seen about the observer's shadow
- Glory (satellite)Failed NASA satellite mission
- Gmelina leichhardtiiGmelina leichhardtii, the white beech, is a tree of eastern Australia. Scattered individua
- GneissCommon high-grade metamorphic rock
- Goddard Institute for Space StudiesNew York City-based NASA laboratory
- Goeree-OverflakkeeGoeree-Overflakkee (Dutch pronunciation: ) is the southernmost delta island of the provinc
- GOES 1NOAA weather satellite
- GOES 13U.S. Space Force weather satellite
- GOES 14NOAA weather satellite
- GOES 15US Space Force weather satellite
- GOES-16NOAA weather satellite
- GOES-17NOAA weather satellite
- GoethiteIron(III) oxide-hydroxide named in honor to the poet Goethe
- Gold cycleBiogeochemical cycle
- Goldschmidt classificationGeochemical classification
- Goldstrike mineGoldstrike is a gold mine in Eureka County in north-eastern Nevada. It is located on the C
- GöllheimGöllheim (pronounced ) is a municipality in the Donnersbergkreis, in Rhineland-Palatinate,
- Gonâve microplatePart of the boundary between the North American plate and the Caribbean plate
- GondwanaNeoproterozoic to Cretaceous landmass
- Gondwanide orogenyThe Gondwanide orogeny was an orogeny active in the Permian that affected parts of Gondwan
- Gorda plateOne of the northern remnants of the Farallon plate
- Gorda RidgeTectonic spreading center off the northern coast of California and southern Oregon
- Gore effectThe Gore effect or Al Gore effect refers to coincidence between occurrences of unseasonabl
- GorstianIn the geologic timescale, the Gorstian is an age of the Ludlow Epoch of the Silurian Peri
- GossanGossan (eiserner hut or eisenhut) is intensely oxidized, weathered or decomposed rock, usu
- GothersgadeGothersgade (Danish pronunciation: ; see below) is a major street in the City Centre of Co
- Government House, The BahamasGovernment House is the official residence of the governor-general of the Bahamas, located
- GrabenDepressed block of planetary crust bordered by parallel normal faults
- Grade (slope)Angle to the horizontal plane
- Graded beddingType of layering in sediment or sedimentary rock
- Grain sizeDiameter of individual grains of sediment, or of lithified particles in clastic rocks
- Gran SabanaRegion in southeastern Venezuela
- Grand Prismatic SpringLargest hot spring in the United States
- Grand StaircaseLandform in Utah and Arizona, United States
- GraniteType of igneous rock
- Granite domeRounded hills of bare granite formed by exfoliation
- GranitoidCategory of coarse-grained igneous rocks
- GranodioriteType of coarse grained intrusive igneous rock
- GranophyreGranophyre ( GRAN-ə-fire; from granite and porphyry) is a subvolcanic rock that contains q
- GranuliteClass of high-grade medium to coarse grained metamorphic rocks
- Granulometry (morphology)In mathematical morphology, granulometry is an approach to compute a size distribution of
- GraupelPrecipitation that forms when supercooled droplets of water freeze on a falling snowflake
- GravelMix of crumbled stones
- GravimetryMeasurement of the strength of a gravitational field
- Gravitational anomalyIn theoretical physics, a gravitational anomaly is an example of a gauge anomaly: it is an
- Gravity anomalyDifference between ideal and observed gravitational acceleration at a location
- Gravity of EarthThe gravity of Earth, denoted by g, is the net acceleration that is imparted to objects du
- Great Appalachian Storm of 1950Extratropical cyclone
- Great Appalachian ValleyThe Great Appalachian Valley, also called The Great Valley or Great Valley Region, is one
- Great Atlantic Sargassum BeltMass of Sargassum in Atlantic Ocean
- Great Barrington tornado1995 tornado in Massachusetts
- Great Blizzard of 1888Severe snowstorm in the northeastern United States and Canada
- Great Blizzard of 1978Historically strong winter storm across central and eastern USA in 1978
- Great Calcite BeltHigh-calcite region of the Southern Ocean
- Great Dayton FloodNatural disaster in Ohio, US in 1913
- Great Dun FellAt a height of 848 metres (2,782 ft), Great Dun Fell is the second-highest mountain in Eng
- Great DykeGeological feature in Zimbabwe
- Great Flood of 1844Missouri and Mississippi River flood
- Great Flood of 1881Historical event
- Great Flood of 19511951 American weather disaster
- Great Flood of 1993Midwestern United States flooding
- Great Gale of 18801880 winter storm in the Northwest United States
- Great Green Wall (China)Windbreak forests planted in northern China
- Great Hurricane of 1780Deadly Atlantic hurricane in 1780
- Great Lakes DepressionSemi-arid depression in Mongolia
- Great Lakes Storm of 1913Winter storm in North America
- Great Lakes tectonic zoneGeologic province
- Great Mississippi Flood of 19271927 flood of the Mississippi River
- Great Natchez TornadoViolent F4+ tornado in Mississippi, US
- Great Ordovician Biodiversification EventEvolutionary radiation of marine animal life throughout the Ordovician period
- Great Oxidation EventPaleoproterozoic surge in atmospheric oxygen
- Great ResetPost-COVID-19 pandemic initiative by the World Economic Forum
- Great Rift Valley, KenyaPart of an intra-continental ridge system that runs through Kenya
- Great Smog of London1952 air pollution event
- Great storm of 1703English extratropical cyclone
- Great Storm of 18241824 hurricane affecting Devon and Dorset
- Great Storm of 1975Storm system in Central and Southeastern United States in 1975
- Great storm of 1987Severe October 1987 storm in Western Europe
- Great UnconformityGap in geological strata in the Grand Canyon
- Great Valley SequenceGroup of late Mesozoic formations in the Central Valley of California
- Greater Grand Forks"Greater Grand Forks" (officially the Grand Forks, ND-MN Metropolitan Statistical Area) is
- Greater La PlataGran La Plata (Greater La Plata) is an urban agglomeration formed around the city of La Pl
- Greek baths of Gela37°4′21.38″N 14°13′49.66″E / 37.0726056°N 14.2304611°E
- Green accountingAccounting that factors environmental costs
- Green bondBonds used to fund projects which benefit the environment
- Green building councilA Green Building Council (GBC) is any national non-profit, non-government organization tha
- Green Climate FundFund helping developing countries to counter climate change
- Green economyEconomy based on ecological economics
- Green growthEconomic growth that is environmentally sustainable
- Green homeType of house designed to be environmentally sustainable
- Green hydrogenHydrogen produced by renewable energy
- Green industrial policyStrategic government policy
- Green infrastructureSustainable and resilient infrastructure
- Green jobJob in business
- Green New DealProposed economic stimulus program
- Green parking lotParking facility designed to be environmentally more sustainable
- Green PRGreen PR is a sub-field of public relations that communicates an organization's corporate
- Green recoveryType of economic stimulus program
- Green River FormationGeologic formation in the United States
- Green roofRoof covered with vegetation
- Green tradingGreen trading encompasses all forms of environmental financial trading, including carbon d
- Green-collar workerEnvironmental-sector worker
- Greene County Courthouse (Ohio)The Greene County Courthouse is located at 45 North Detroit Street in Xenia, Ohio. The bui
- Greenfield tornado2024 EF4 tornado in Iowa, U.S.
- Greenhouse and icehouse EarthOpposing climate states on Earth
- Greenhouse effectAtmospheric heat retention
- Greenhouse gasHeat-trapping gas in an atmosphere
- Greenhouse gas emissionsGreenhouse gases emitted from human activities
- Greenhouse gas emissions by ChinaThe total greenhouse gas emissions of the People's Republic of China are the world's highe
- Greenhouse gas emissions by RussiaGreenhouse gas emissions originating from Russia and efforts to reduce them
- Greenhouse gas emissions by the United KingdomOverview of the greenhouse gas emissions by United Kingdom
- Greenhouse gas emissions by the United StatesThe United States produced 7 billion metric tons of carbon dioxide equivalent greenhouse g
- Greenhouse gas emissions from agricultureGreenhouse gas emissions from agriculture are large: the agriculture, forestry and land us
- Greenhouse gas emissions from wetlandsSource of gas emissions
- Greenhouse gas inventoryInventory for emissions of greenhouse gases
- Greenhouse gas monitoringMeasurement of greenhouse gas emissions and levels
- Greenhouse Gases Observing SatelliteGreenhouse Gases Observing Satellite (GOSAT), also known as Ibuki (Japanese: いぶき, Hepburn:
- Greenland ice core projectThe Greenland Ice Core Project (GRIP) was a research project organized through the Europea
- Greenland Ice Sheet ProjectThe Greenland Ice Sheet Project (GISP) was a decade-long project to drill ice cores in Gre
- GreenockiteCadmium sulfide mineral
- Greenpeace USAUS climate change organization
- GreenschistMetamorphic rock
- Greenstone beltZone of variably metamorphosed rocks occurring in Archaean and Proterozoic cratons
- GreenwashingMisleading environmental marketing claims
- Gregory RiftEastern branch of the East African Rift fracture system
- GreigiteIron sulfide mineral of spinel structure
- GreisenHighly altered granitic rock or pegmatite
- Grenville orogenyMesoproterozoic mountain-building event
- GreywackeSandstone with angular grains in a clay-fine matrix
- GrossularGarnet, nesosilicate mineral
- Ground blizzardSnow and ice blown by strong winds
- Ground-level ozoneConstituent gas of the troposphere
- Ground-penetrating radarGeophysical method that uses radar pulses to image the subsurface
- Groundhog Day gale of 1976Severe winter storm in North America
- GroundwaterWater located beneath the ground surface
- Groundwater depletionUnsustainable extraction of groundwater
- Groundwater rechargeGroundwater that recharges an aquifer
- Groundwater sappingGroundwater sapping is a geomorphic erosion process that results in the headward migration
- Groundwater-related subsidenceSinking of land due to groundwater extraction
- Group (stratigraphy)Group of geologic formations
- Grove (nature)Small group of trees
- Grove Karl GilbertAmerican geologist (1843–1918)
- Growth faultGrowth faults are syndepositional or syn-sedimentary extensional faults that initiate and
- Guianan savannaThe Guianan savanna (NT0707) is an ecoregion in the south of Venezuela, Guyana and Surinam
- GulchA gulch is a deep V-shaped valley formed by erosion. It may contain a small stream or dry
- Gulf Coast of the United StatesRegion of the US bordering the Gulf of Mexico
- Gulf CountryThe Gulf Country or North West Queensland is the region of woodland and savanna grassland
- Gulf of SuezGulf of the Red Sea separating African Egypt from the Sinai Peninsula
- Gulf of Suez RiftAncient geological rift
- GullyLandform created by running water and/or mass movement eroding sharply into soil
- Gunflint chertGeologic formation in Minnesota and Ontario
- Gunz (geology)Timespan in the glacial history of the Alps
- GustnadoGround vortex formed from a downburst of a thunderstorm
- Guy Stewart CallendarEngineer, connected human activity to global warming
- GuyotFlat-topped underwater mountain
- GypcrustGypcrete or gypcrust is a hardened layer of soil, consisting of around 95% gypsum (calcium
- GypsumSoft calcium sulfate mineral
