Lably
Skip to contentM
- MaarLow-relief volcanic crater
- MaastrichtianSixth and last age of the Late Cretaceous
- Macellum of PozzuoliRoman market building in Pozzuoli, Italy
- Machilus thunbergiiMachilus thunbergii (syn. Persea thunbergii), the Japanese bay tree, red machilus, or tabu
- MackinawiteMackinawite is an iron nickel sulfide mineral with the chemical formula (Fe,Ni)1+xS (where
- Macquarie fault zoneLateral-moving transform fault south of New Zealand
- MacrofossilPreserved organic remains large enough to be visible without a microscope
- Madden–Julian oscillationTropical atmosphere element of variability
- Madison GroupGeologic formation in the western United States
- Madison RangeThe Madison Range is a mountain range located in the Rocky Mountains of Montana and Idaho
- MaficSilicate mineral or igneous rock that is rich in magnesium and iron
- MaghemiteIron oxide with a spinel ferrite structure
- MagmaHot semifluid material found beneath the surface of Earth
- Magma chamberAccumulation of molten rock within the Earth's crust
- Magma supply rateThe magma supply rate measures the production rate of magma at a volcano. Global magma pro
- Magmatic underplatingTrapping of basaltic magmas within the crust
- Magmatic waterMagmatic water, also known as juvenile water, is an aqueous phase in equilibrium with mine
- MagmatismSurface magma that becomes igneous rock
- Magmatism along strike-slip faultsProcess of rock melting
- MagnesiteType of mineral
- Magnetic anomalyLocal variation in the Earth's magnetic field
- Magnetic field of MarsThe magnetic field of Mars is the magnetic field generated from Mars's interior. Today, Ma
- Magnetic mineralogyStudy of magnetic properties of minerals
- Magnetic survey (archaeology)Magnetic detection of archaeological artefacts and features
- MagnetiteIron ore mineral
- MagnetosomeOrganelle in magnetotactic bacteria
- MagnetostratigraphyMethod of dating sedimentary and volcanic rocks
- MagnetotelluricsElectromagnetic geophysical technique
- MahanoroMahanoro is a rural municipality located in the Atsinanana region of eastern Madagascar, a
- Main Central ThrustThe Main Central Thrust is a major geological fault where the Indian plate has pushed unde
- Main development regionThe main development region is the area of warm water in the Atlantic Ocean stretching fro
- Main Himalayan ThrustGeological feature
- Main Uralian FaultThe Main Uralian Fault (MUF) is a fault that runs north–south through the middle of the Ur
- MainshockLargest earthquake in a sequence
- Major Economies Forum on Energy and Climate ChangeThe Major Economies Forum on Energy and Climate (MEF) was launched on March 28, 2009. The
- Majuro DeclarationThe Majuro Declaration is an initiative of the Pacific Islands Forum, which was signed on
- MalachiteMineral variety of copper carbonate
- MalaunayMalaunay (French pronunciation: ) is a commune of the Rouen Metropolis in the Seine-Mariti
- Malcolm K. HughesMalcolm K. Hughes is a meso-climatologist and Regents' Professor of Dendrochronology in th
- Maldives–Sri Lanka relationsMaldives–Sri Lanka relations, or official and economic relations between the neighbouring
- MaloloMalolo is a volcanic island in the Pacific Ocean, near Fiji. Malolo was used as a tribe na
- Mammoth Hot SpringsHot spring complex in Yellowstone National Park, Park County, Wyoming, U.S.
- Mammoth Pool ReservoirMammoth Pool Reservoir is a reservoir on the San Joaquin River in the Sierra Nevada, withi
- Managed retreatCoordinated movement of people and buildings away from risks
- MananjaryMananjary is a city on the East coast of Madagascar with a population of 25,222 inhabitant
- Manda FormationGeologic formation in Tanzania
- Manganese cycleBiogeochemical cycle
- Manganese noduleMineral concretion found on the sea bottom
- MangroveShrub growing in brackish water
- Mangrove forestProductive wetlands that occur in coastal intertidal zones
- Mangrove restorationEcosystem regeneration
- Manila TrenchOceanic trench in the South China Sea, west of Luzon and Mindoro in the Philippines
- Mantle convectionGradual movement of the planet's mantle
- Mantle plumeUpwelling of abnormally hot rock within Earth's mantle
- Mantle wedgeTriangular section of mantle between a subducting and overriding tectonic plate
- Manure managementAgricultural practice
- Maokong GondolaThe Maokong Gondola (traditional Chinese: 貓空纜車; simplified Chinese: 猫空缆车; pinyin: Māokōng
- Mapoon, QueenslandMapoon is a coastal town in the Aboriginal Shire of Mapoon and a locality split between th
- Mapping of VenusThe mapping of Venus refers to the process and results of human description of the geologi
- MarbleType of metamorphic rock
- MarcasiteIron disulfide (FeS2) with orthorhombic crystal structure
- Marcia BjornerudAmerican structural geologist
- Mareuil AnticlineThe Mareuil Anticline, also called Mareuil-Meyssac Anticline, is a structural high within
- Marginal abatement costMarginal cost of reducing pollution
- Maria KlenovaRussian and Soviet marine geologist
- Mariana plateSmall tectonic plate west of the Mariana Trench
- Marine biogenic calcificationShell formation mechanism
- Marine chemistryChemistry of oceans and seas
- Marine clayType of clay found in coastal regions around the world
- Marine coastal ecosystemWildland-ocean interface
- Marine debrisHuman-created solid waste in the sea or ocean
- Marine ecoregionA marine ecoregion is an ecoregion, or ecological region, of the oceans and seas identifie
- Marine ecosystemEcosystem in saltwater environment
- Marine geologyStudy of the history and structure of the ocean floor
- Marine geophysicsMarine geophysics is the scientific discipline that employs methods of geophysics to study
- Marine habitatHabitat that supports marine life
- Marine heatwaveUnusually warm temperature event in the ocean
- Marine permacultureMethod to regenerate life in the ocean
- Marine plastic pollutionEnvironmental pollution by plastics
- Marine primary productionMarine synthesis of organic compounds
- Marine protected areaProtected areas of seas, oceans, estuaries or large lakes
- Marine regressionGeologic event in which sea level falls relative to the land
- Marine sedimentAccumulated material on seafloor
- Marine snowShower of organic detritus in the ocean
- Marine Stewardship CouncilFishing certifier
- Marine Terrace, FremantleMarine Terrace is a road on the southern side of the built up area of Fremantle, Western A
- Marine transgressionGeologic event in which sea level rises relative to the land
- Marine weather forecastingForecasts of weather conditions at sea
- Marinoan glaciationPeriod of worldwide glaciation during the Cryogenian period
- Marion, North DakotaMarion is a city in LaMoure County, North Dakota, United States. The population was 125 at
- Maritime industries of TaiwanThe maritime industries of Taiwan are a large part of Taiwan's economy. Industries of part
- Mark SerrezeAmerican geographer
- Marker horizonStratigraphic units used to correlate the age of strata in rocks
- MarlLime-rich mud or mudstone which contains variable amounts of clays and silt
- Marlboro, OhioMarlboro is a census-designated place in Stark County, Ohio, United States.
- Marlborough fault systemActive fault system in New Zealand
- MarrellaExtinct genus of Arthropods
- MarshLow-lying and seasonally waterlogged land
- Marsh gasGas produced naturally within marshes, swamps and bogs
- MarshiteMarshite (CuI) is a naturally occurring isometric halide mineral with occasional silver (A
- MarsquakeSeismic event occurring on Mars
- Martin City, MissouriMartin City is a neighborhood of Kansas City, Missouri located along the Missouri and Kans
- Martin curveMathematical representation of particulate organic carbon export to ocean floor
- Martin HotineBritish Army officer and surveyor
- Martinsburg FormationGeologic formation in the eastern United States
- Marysvale, UtahMarysvale is a town in Piute County, Utah, United States. The population was 408 at the 20
- Marysville, IndianaMarysville is an unincorporated community in Oregon Township, Clark County, Indiana.
- Mascarene PlateauSubmarine plateau in the western Indian Ocean
- Mass balanceIn physics, a mass balance, also called a material balance, is an application of conservat
- Mass graveGrave containing a number of human corpses
- Mass wastingMovement of rock or soil down slopes
- Massachusetts v. EPA2007 United States Supreme Court case
- MassifPrincipal mass of a mountain
- MassignanoMassignano is a comune (municipality) in the Province of Ascoli Piceno in the Italian regi
- Matanzas ProvinceMatanzas (Spanish pronunciation: ) is one of the provinces of Cuba. Major towns in the pro
- MatlockiteRare lead halide mineral
- Mattawa, OntarioMattawa is a town in northeastern Ontario, Canada at the confluence of the Mattawa and Ott
- Maumoon Abdul GayoomPresident of the Maldives from 1978 to 2008
- Mauna Loa ObservatoryAtmospheric research station on island of Hawaii
- Maunder MinimumPeriod of low solar activity, 1645–1715
- Maureen RaymoAmerican climate scientist and marine geologist
- Mauritia (microcontinent)Precambrian microcontinent that broke off India and Madagascar
- Mavis BankMavis Bank is a rural coffee farming community approximately 10 miles (16 km) north east o
- Mawson StationMawson Station, commonly called Mawson, is one of three permanent bases and research outpo
- Maximum sustained windIntensity indicator of tropical cyclone
- May 1921 geomagnetic stormExceptionally powerful geomagnetic storm
- May 1997 Bangladesh cycloneThe May 1997 Bangladesh cyclone was a powerful and deadly storm that caused widespread dam
- May 1998 Afghanistan earthquakeSevere earthquake centered in Takhar Province, Afghanistan
- May BoeveMay Boeve is an American environmental activist. She is a founder and executive director o
- Mazatzal orogenyThe Mazatzal orogeny was an orogenic event in what is now the Southwestern United States f
- McArthur RiverThe McArthur River is a river in the Northern Territory of Australia which flows into the
- McClellanville, South CarolinaMcClellanville is a small fishing town in rural Charleston County, South Carolina, United
- McDermitt CalderaThe McDermitt Caldera is a large, oval-shaped caldera west of McDermitt in southeastern Or
- McMillan IslandMcMillan Island is an island in the Fraser River, British Columbia, Canada, also known as
- MeadowOpen habitat vegetated primarily by non-woody plants
- MeanderOne of a series of curves in a channel of a matured stream
- Meander cutoffA meander cutoff is a natural form of a cutting or cut in a river occurs when a pronounced
- Meat taxTax on animal products
- Mechanically stabilized earthMechanically stabilized earth (MSE or reinforced soil) is soil constructed with artificial
- MedgridMedgrid project, created at the end of 2010 in Paris, is a large industrial project planne
- Media coverage of climate changeMedia coverage of climate change has had effects on public opinion on climate change, as i
- Media coverage of tropical cyclonesMedia coverage of tropical cyclones has been carried out in various ways over the past cen
- Medical geologyField crossing geology and medicine
- Medieval Warm PeriodNorth Atlantic regional climate era, c. 950 - c. 1250
- Mediterranean climateType of climate
- Mediterranean forests, woodlands, and scrubHabitat defined by the World Wide Fund for Nature
- MegacryometeorType of precipitation
- Megathrust earthquakeType of earthquake at convergent plate boundaries
- MegatsunamiVery large wave created by a large, sudden displacement of material into a body of water
- MeghalayanThird stage of the Holocene epoch
- MélangeLarge-scale breccia
- Melbourne Bone BedPleistocene fossil and archaeological site in Florida
- MeliliteSorosilicate mineral
- MeltwaterWater released by the melting of snow or ice
- Memorial Medical Center and Hurricane KatrinaMemorial Medical Center in New Orleans, Louisiana was heavily damaged when Hurricane Katri
- Memory GroveMemory Grove, formerly known as Memory Park and sometimes called Memory Grove Park, is a p
- Mendocino fracture zoneGeologic fracture zone and transform boundary near northern California
- Mendocino triple junctionPoint where the Gorda plate, the North American plate, and the Pacific plate meet
- Merchants of Doubt2010 book by Naomi Oreskes and Erik M. Conway
- Merensky ReefLayer of igneous rock in the Bushveld igneous complex, South Africa
- Meridian arcDistance along a portion of a meridian, for use in geodesy
- MeridianiiteMeridianiite is the mineral consisting of magnesium sulfate undecahydrate, MgSO4·11H2O. It
- MeroplanktonAquatic organisms with multiple life stages
- MerrilliteMerrillite is a calcium phosphate mineral with the chemical formula Ca9NaMg(PO4)7. It is a
- MesaElevated area of land with a flat top and sides, usually much wider than buttes
- Mesa Falls TuffThe Mesa Falls Tuff is a tuff formation produced by the Mesa Falls eruption that formed th
- Mesh (scale)Mesh is a measurement of particle size often used in determining the particle-size distrib
- MesoarcheanThird era of the Archean Eon
- MesocycloneRegion of rotation within a powerful thunderstorm
- MesopauseBoundary between the mesosphere and thermosphere
- Mesopelagic zonePart of the pelagic zone
- MesoplatesThe term "mesoplates" has been applied in two different contexts within geology and geophy
- MesoproterozoicSecond era of the Proterozoic Eon
- Mesoscale convective complexA mesoscale convective complex (MCC) is a unique kind of mesoscale convective system which
- Mesoscale convective systemComplex of thunderstorms organized on a larger scale
- Mesoscale meteorologyModerately sized weather phenomena
- MesosphereLayer of the atmosphere directly above the stratosphere and below the thermosphere
- MesozoicSecond era of the Phanerozoic Eon
- MessinianSixth and last age of the Miocene Epoch, about 7 to 5 million years ago
- Messinian salinity crisisDrying-up of the Mediterranean Sea 5.96–5.33 million years ago
- Met OfficeUnited Kingdom's national weather service
- Met Office Hadley CentreBritish climate research institute
- Metal–air electrochemical cellElectrochemical cell using a metallic anode and oxygen cathode
- Metallurgical coalGrade of coal
- Metamorphic core complexMetamorphic core complexes are exposed areas of deep crust brought to the surface by crust
- Metamorphic faciesMineral assemblage in metamorphic rocks
- Metamorphic rockRock that was subjected to heat and pressure
- MetamorphismChange of minerals in pre-existing rocks without melting into liquid magma
- METARFormat for weather reports used in aviation
- MetasomatismChemical alteration of a rock by hydrothermal and other fluids
- Météo-FranceNational meteorological and climatological service of France
- Meteoric ironIron originating from a meteorite rather than from the Earth since formation
- MeteoriteSolid debris from outer space that hits a planetary surface
- Meteorite fallCollected meteorite whose fall was observed
- Meteorite findA meteorite find is a meteorite that was found by people, but whose fall was not observed.
- MeteoriticsScientific study of meteors, meteorites and meteoroids
- Meteorological history of Hurricane DorianHurricane Dorian was the strongest hurricane to affect The Bahamas on record, causing cata
- Meteorological history of Hurricane GeorgesThe meteorological history of Hurricane Georges spanned seventeen days from September 15 t
- Meteorological history of Hurricane HarveyHurricane Harvey was the costliest tropical cyclone on record (tied with Hurricane Katrina
- Meteorological history of Hurricane IrmaHurricane Irma was an extremely powerful Cape Verde hurricane that caused extensive damage
- Meteorological history of Hurricane MariaHurricane Maria was among the most intense Atlantic hurricanes on record and caused catast
- Meteorological history of Hurricane MatthewHurricane Matthew was the first Category 5 Atlantic hurricane since Hurricane Felix in 200
- Meteorological history of Hurricane SandyHurricane Sandy was the sixth-costliest Atlantic hurricane on record. It lasted for over a
- Meteorological instrumentationMeasuring device used in meteorology
- MeteorologistScientist specialising in meteorology
- MeteorologyScientific study of the atmosphere focusing on weather forecasting
- Meteorology in the 21st centuryThis is a timeline of scientific and technological advancements as well as notable academi
- Methane clathrateMethane-water lattice compound
- Methane emissionsSources of methane gas in Earth's atmosphere
- Methane leakUnintended escape of methane from containment
- MetoceanStudy of weather and the ocean
- MetoposaurusMetoposaurus meaning "front lizard" is an extinct genus of stereospondyl temnospondyls, kn
- MetServiceMeteorological service of New Zealand
- Mexican Geological SurveyThe Servicio Geológico Mexicano (SGM; English: Mexican Geological Survey) is a decentraliz
- Mexico tropical cyclone rainfall climatologyMexico tropical cyclone rainfall climatology discusses precipitation characteristics of tr
- MicaGroup of phyllosilicate minerals
- Michael J. HicksMichael J. Hicks (born in 1962) is the George & Frances Ball Distinguished Professor of Ec
- Michigan State Historic Preservation OfficeThe Michigan State Historic Preservation Office is one of 59 state historic preservation o
- Micranthes virginiensisMicranthes virginiensis, the early saxifrage, or Virginia saxifrage, is a wildflower nativ
- MicrobaromIn acoustics, microbaroms, also known as the "voice of the sea", are a class of atmospheri
- Microbial carbon pumpThe microbial carbon pump (MCP) is a biological process in the ocean where microorganisms,
- Microbial electrolysis carbon captureMicrobial electrolysis carbon capture (MECC) is a carbon capture technique using microbial
- Microbial matMulti-layered sheet of microorganisms
- Microbially induced sedimentary structureMicrobially induced sedimentary structures (MISS) are primary sedimentary structures forme
- Microbiologically induced calcite precipitationBio-geochemical process
- Microbiology of decompositionMicrobiology of decomposition is the study of all microorganisms involved in decomposition
- MicroclimateLocal set of atmospheric conditions that differ significantly from the surrounding area
- MicroclineIgneous rock-forming feldspar mineral
- MicrofossilFossil that requires the use of a microscope to see
- MicrometeoriteMeteoroid that survives Earth's atmosphere
- MicroprobeA microprobe is an instrument that applies a stable and well-focused beam of charged parti
- Mid-Cenomanian EventThe Mid-Cenomanian Event (MCE) was an oceanic anoxic event that took place during the midd
- Mid-ocean ridgeBasaltic underwater mountain system formed by plate tectonic spreading
- Mid-Pleistocene TransitionChange in glacial cycles c. 1m years ago
- Midcontinent Rift SystemGeological rift in the center of the North American continent
- Middle America TrenchSubduction zone in the eastern Pacific off the southwestern coast of Middle America
- Middle DutchWest Germanic language of the High and Late Middle Ages
- Middle PleistoceneStage of the Pleistocene Epoch
- Middleton FormationThe Middleton Formation is a geological formation that extends through the Northern Cape,
- Midnight, MississippiMidnight is an unincorporated community located in Humphreys County, Mississippi, United S
- MigmatiteMixture of metamorphic rock and igneous rock
- Migration (ecology)Large-scale movement of members of a species to a different environment
- Mike Pitts (archaeologist)Michael W. Pitts, FSA, is an English freelance journalist and archaeologist who specialise
- Mikhail MolodenskiiSoviet geodesist
- Milankovitch cyclesGlobal climate cycles
- Military geologyGeological theory applied to warfare
- Milky storkThe milky stork (Mycteria cinerea) is a stork species inhabiting predominantly mangroves i
- MilleriteNickel sulfide mineral
- Million Tree InitiativeEnvironmental project
- Milwaukee DeepDeepest part of the Atlantic Ocean; part of the Puerto Rico Trench
- Mindat.orgNon-commercial online mineralogical database
- Mine explorationMine exploration is a hobby in which people visit abandoned mines, quarries, and sometimes
- MineralCrystalline chemical element or compound formed by geologic processes
- Mineral collectingHobby of collecting mineral specimens
- Mineral evolutionIncreasing mineral diversity over time
- Mineral physicsScience of materials that compose the interior of planets
- Mineralization (soil science)Decomposition of organic matter
- Mineralized tissuesBiological tissues incorporating minerals
- Mineralogical Society of AmericaScientific organization promoting mineralogy
- MineralogyScientific study of minerals and mineralised artifacts
- MineraloidNon-crystalline mineral-like substance
- Minimum energy performance standardA minimum energy performance standard (MEPS) is a specification, containing a number of pe
- Mining geologyMining geology is an applied science which combines the principles of economic geology and
- Ministry of Climate Change, Environment and EnergyMinistry tasked with preserving Maldivian ecosystems, etc.
- Ministry of Environment (Romania)Government ministry of Romania
- Ministry of Environment, Forest and Climate ChangeGovernment ministry of India
- MioceneFirst epoch of the Neogene Period
- Mir mineFormer open pit diamond mine
- Mira, VenetoMira is a comune (municipality) in the southern Veneto, northern Italy. It is part of the
- MirageOptical illusion caused by bending of light
- Miscibility gapA miscibility gap is a region in a phase diagram for a mixture of components where the mix
- Mishmi HillsThe Mishmi Hills are located at the northeastern tip of India, in northeastern Arunachal P
- Mississippi Insurance DepartmentThe Mississippi Insurance Department was created as a separate department by an Act of the
- Mississippian (geology)First subperiod of the Carboniferous Period
- MistPhenomenon caused by small droplets of water suspended in air
- MitigationReduction of something harmful or the reduction of its harmful effects
- Mixed layerLayer in which active turbulence has homogenized some range of depths
- Mixing ratioAbundance of one component of a mixture relative to others
- MixoplanktonPlankton that can both photosynthesize and eat other organisms
- Mobile emission reduction creditA mobile emission reduction credit (MERC) is an emission reduction credit generated within
- Mocha-Villarrica Fault ZoneThe Mocha-Villarrica Fault Zone is a northwest-trending geological fault zone in southern
- Moderate Resolution Imaging SpectroradiometerPayload imaging sensor
- Modified Mercalli intensity scaleSeismic intensity scale used to quantify the degree of shaking during earthquakes
- Moenkopi FormationGeologic formation in the southwestern United States
- MoganiteSilica mineral, rare monoclinic polymorph of quartz
- Mohamed NasheedPresident of the Maldives from 2008 to 2012
- Mohorovičić discontinuityBoundary between the Earth's crust and the mantle
- Mohs scaleClassification framework for scratch resistance
- Moine Thrust BeltFault in Highland, Scotland, UK
- MoinianGeological rock formation in Scotland
- Molasse basinForeland basin north of the Alps
- Moldanubian ZoneTectonic zone in Europe
- Molucca Sea plateSmall fully subducted tectonic plate near Indonesia
- MolybdeniteMolybdenum disulfide mineral
- Moment magnitude scaleMeasure of earthquake size
- MonaziteMineral containing rare-earth elements
- Monazite geochronologyGeological dating technique
- Monmouth County, New JerseyCounty in New Jersey, United States
- Mono–Inyo CratersVolcanic chain in eastern California, United States
- MonolithStone block made of one single piece; object made of one single rock piece
- Monongahela RiverRiver in Eastern United States
- MonsoonSeasonal changes in atmospheric circulation and precipitation
- Monsoon of South AsiaMonsoon in Indian subcontinent
- Monsoon troughWeather phenomenon
- Montane ecosystemEcosystems found in mountains
- Montane grasslands and shrublandsBiome defined by the World Wildlife Fund
- Monte HachoMonte Hacho is a low mountain that overlooks the Spanish city of Ceuta, on the north coast
- Monterey FormationMiocene geological sedimentary formation in California
- Monticello, South CarolinaMonticello, South Carolina is an unincorporated community in Fairfield County, South Carol
- MontmorilloniteMontmorillonite is a very soft phyllosilicate group of minerals that form when they precip
- MonzoniteIgneous intrusive rock with low quartz and equal plagioclase and alkali feldspar
- Moonstone FormationGeologic formation in Wyoming, United States
- MoorlandType of habitat
- Moose Lake, MinnesotaMoose Lake is a city in Carlton County, Minnesota, United States. The population was 2,789
- MoraineGlacially formed accumulation of debris
- Morant PointMorant Point in Saint Thomas Parish is the easternmost point of mainland Jamaica and the s
- Morar GroupThe Morar Group is a sequence of Tonian (lower Neoproterozoic) sedimentary rocks that have
- Morganite (gem)Beryl variety
- Mormon LakeMormon Lake is a shallow, intermittent lake located in northern Arizona in Pleasant Valley
- MorokwengMorokweng is a town in Kagisano-Molopo Local Municipality in the North West province of So
- Morokweng impact structureImpact structure in the Kalahari Desert
- MorombeMorombe is an urban municipality (commune urbaine) on the south-west coast in Atsimo-Andre
- Moscovian ageFifth stage of the Carboniferous
- Mother NaturePersonification of Earth's environment
- MottlePattern of irregular marks on plants or animals
- Mound-building termitesGroup of termite species
- Mount ElkinsMountain in Enderby Land, Antarctica
- Mount GaribaldiStratovolcano in British Columbia, Canada
- Mount MoMountain in Hubei, China
- Mount SinaiMountain in the Sinai Peninsula
- Mount Stephen trilobite bedsThe Mount Stephen trilobite beds (UNSM locality 14s) are a series of fossil strata on Moun
- Mount TsubakuroMount Tsubakuro (燕岳, Tsubakuro-dake) is a 2,763-metre-high (9,065 ft) mountain in Azumino,
- Mountain formationGeological processes that underlie the formation of mountains
- Mountain passRoute through a mountain range or over a ridge
- Mountain Pass, CaliforniaMountain Pass is an unincorporated community in San Bernardino County, California, United
- Mountain rangeGeographic area containing several geologically related mountains
- MtunziniMtunzini (Zulu: eMthunzini, from umthunzi meaning "a place in the shade") is a small coast
- MudMixture of water and any combination of soil, silt, sand, and clay
- Mud volcanoLandform created by the eruption of mud or slurries, water, and gases
- MudcrackPattern of cracks in dried muddy soil
- MudflatCoastal wetlands where sediments have been deposited by tides or rivers
- MudflowForm of mass wasting
- MudpotA mudpot, or mud pool, is a type of acidic hot spring, or fumarole, with limited water. It
- MudrockType of sedimentary rock
- MudstoneFine grained sedimentary rock whose original constituents were clays or muds
- MulliteMullite or porcelainite is a rare silicate mineral formed during contact metamorphism of c
- Multicellular thunderstormThunderstorm composed of multiple storm cells
- MultifuelMultifuel, sometimes spelled multi-fuel, is any type of engine, boiler, or heater or other
- Multiple-vortex tornadoTornado comprising multiple vortices
- Mundabullangana, Western AustraliaMundabullangana is a settlement in Western Australia, located approximately 100 km south-w
- Murchison meteoriteMeteorite found in Victoria, Australia
- Murray BasinThe Murray Basin is a Cenozoic sedimentary basin in south eastern Australia. The basin is
- MuscovitePhyllosilicate mineral in the dioctahedral mica group
- Museo Civico di Storia Naturale di MilanoMuseum in Milan, Italy
- Museum of Tropical QueenslandQueensland Museum Tropics (formerly Museum of Tropical Queensland) is located in Townsvill
- Mushroom cloudCloud of debris and smoke from a large explosion
- MuskegBog-like ecosystem common in Arctic and boreal areas
- MV Sinar Kudus hijacking2011 ship hijaking
- MY Le PonantLe Ponant is a three-masted, commercially operated French luxury yacht operated by Compagn
- MycoloopTrophic pathway in aquatic food webs
- Mycorrhizal fungi and soil carbon storageTerrestrial ecosystem
- MyloniteMetamorphic rock
- Myra KeenAmerican malacologist and invertebrate paleontologist
