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GEOLOGY AND PLANETARY SCIENCE
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• ablation
• Acasta formation
• accretionary lapilli
• accretionary wedge
• acid rock
• active fault
• aeolian structure
• aftershock
• agate
• agglomerate
• alabaster
• albedo feature
• albite
• alkali flats
• alluvial fan
• alluvium
• alumina
• Amazonian Epoch
• amber
• amethyst
• amphibole
• andalusite
• andesite
• anglesite
• anhydrite
• anorthite
• anorthosite
• anthracite
• anticline
• antlerite
• apatite
• aquifer
• aragonite
• arenaceous
• argillaceous
• arète
• argentite
• arkose
• arsenopyrite
• asbestos
• ash
• asteroid
• asthenosphere
• astrobleme
• atoll
• attrition
• augite
• avalanche
• azurite
• backwash
• badlands
• banded iron formation
• barchan
• barite
• barrier island
• barrier reef
• Barringer Crater
• basalt
• basin
• batholith
• bauxite
• bay bar
• bayou
• beach
• bed
• bedding plane
• bedrock
• Benioff zone
• benitoite
• bentonite
• bergschrund
• beryl
• biominerals
• biostrome
• biotite
• bituminous sands
• black smoker
• blind thrust fault
• block mountain
• blowhole
• bluff
• body wave
• borax
• bornite
• Bouguer anomaly
• braided stream
• breccia
• brucite
• Burgess Shale
• butte
• calamine
• calcareous
• calcite
• caldera
• Cambrian Period
• Canadian Shield
• canyon
• carbonate
• Carboniferous Period
• carnelian
• carnotite
• cassiterite
• cat's eye
• cave
• Cenozoic Era
• cerussite
• chalcedony
• chalcocite
• chalcopyrite
• chalk
• Chandler wobble
• chaotic terrain
• chert
• chlorite
• chromite
• Chryse Planitia
• chrysoberyl
• chrysotile
• cinder cone
• cinnabar
• cirque
• citrine
• clastic rock
• clay
• cleavage
• cliff
• coal
• col
• columbite
• conchoid fracture
• concretion
• conglomerate
• continent
• continental drift
• continental shelf
• cordillera
• core
• corundum
• crater
• crater chain
• Cretaceous Period
• Cretaceous-Tertiary boundary
• crossbedding
• cross-cutting
• crust
• cryolite
• cryovolcanism
• cryptovolcano
• cuesta
• cuprite
• dacite
• dark halo crater
• debris avalanche
• delta
• desert
• Devonian Period
• differentiation
• dike
• diorite
• dolerite
• dolomite
• drift
• drumlin
• Dry Valleys
• dune
• Earth
• Earth impact craters
• earthquake
• Ediacaran Period
• effusive eruption
• ejecta
• ejecta blanket
• electrum
• elements, terrestrial abundance
• emerald
• emery
• enstatite
• Eocene Period
• epicenter
• era
• erosion
• escarpment
• esker
• estuary
• evaporite
• extrusive
• fall line
• fault
• fault scarp
• feldspar
• firth
• fissure
• fjord
• flint
• flood plain
• fluorite
• fluvial
• fold
• formation age
• fossil
• fumarole
• gabbro
• galena
• gardening
• garnet
• garnierite
• gemstone
• geode
• geodesy
• geography
• geoid
• geologic time
• geology
• geomorphology
• geophysics
• geosyncline
• geyser
• ghost crater
• Giant's Causeway
• gilsonite
• glacial drift
• glacier
• glauconite
• gneiss
• goethite
• Gondwanaland
• gorge
• graben
• granite
• gravel
• Great Rift Valley
• grike
• grit
• gritstone
• grooved terrain
• groundwater
• Gulf Stream
• Gusev Crater
• guyot
• gypsum
• halite
• hanging valley
• hematite
• hemimorphite
• Hesperian Epoch
• Holocene Epoch
• hornblende
• hornito
• horst
• hot spot
• hot spring
• hummock
• Hutton, James (1726–1797)
• hydrology
• hydrosphere
• hypersthene
• ice ages
• iceberg
• ice volcanism
• Iceland spar
• igneous
• igneous age
• ilmenite
• impact basin
• impact crater
• impact melt
• inclusion
• intrusive
• Isidis Planitia
• island
• isthmus
• jade
• jasper
• jökulhlaup
• Jurassic Period
• kaolinite
• kame
• karst
• kernite
• kettle hole
• kieselguhr
• kimberlite
• kipuka
• labradorite
• lagoon
• lahar
• lake
• lapilli
• lapis lazuli
• laterite
• Laurasia
• lava
• lava delta
• lava flow
• lava fountain
• lava lake
• lava tube
• lazurite
• leaching
• limonite
• limu
• limu
• lineament
• lithosphere
• littoral cone
• loess
• longshore drift
• Lyell, Charles (1797–1875)
• maar
• mafic
• maghemite
• magma
• magnesite
• magnetite
• malachite
• manganite
• mantle
• marble
• maria
• marl
• mascon
• massif
• matrix
• meerschaum
• Mercator, Gerardus (1512–1594)
• Meridiani Planum
• mesa
• Mesozoic Era
• metamorphic
• meteorite
• mica
• microcline
• mid-ocean ridge
• Milankovich cycles
• mineral
• Miocene Epoch
• Mississippian
• Mohoroviic discontinuity
• Mohs scale
• molybdenite
• monadnock
• monazite
• montmorillonite
• moonstone
• moraine
• Morokweng Crater
• mountain
• mud volcano
• multiringed basin
• muscovite
• muskeg
• Nansen, Fridtjof (1861–1930)
• névé
• niccolite
• Noachian Epoch
• norite
• North Pole
• oasis
• obsidian
• ocean
• ocean basin
• ocean currents
• ocean trench
• ocean waves
• oceanography
• ocher
• old surface
• oil sands
• oil shale
• Oligocene Epoch
• olivine
• Olympus Mons
• onyx
• oolith
• oozes
• opal
• ore
• Ordovician Period
• orogenies
• orpiment
• orthoclase
• orthopyroxene
• outgassing
• oxbow lake
• P wave
• pahoehoe
• Paleocene
• paleoclimatology
• paleogeography
• paleomagnetism
• Paleozoic Era
• palimpsest
• Pangea
• pegmatite
• Pele's hair
• Pele's tears
• peneplain
• Pennsylvanian
• pentlandite
• peridotite
• permafrost
• Permian Period
• Phanerozoic
• phlogopite
• phreatic eruption
• pillow lava
• pit crater
• pitchblende
• plagioclase
• planetary features
• plate tectonics
• playa
• Pleistocene Period
• plinean eruption
• Pliocene Epoch
• plume
• pluton
• polar wandering
• porosity
• porphyry
• Precambrian
• pressure ridges
• primordial atmosphere
• prospecting
• Proterozoic
• pseudocrater
• pumice
• pyrite
• pyroclastic
• pyroclastic flow
• pyrolusite
• pyroxene
• pyrrhotite
• quartz
• quartzite
• Quaternary Period
• quicksand
• radiocarbon
• rain shadow
• raised beach
• ray crater
• realgar
• reducing atmosphere
• regolith
• relief
• resurfacing
• reticulite
• rhyolite
• Richter scale
• rift valley
• rift zone
• rille
• ring, planetary
• river
• rock
• ruby
• rutile
• S wave
• salt dome
• salt flat
• sand
• sandstone
• sapphire
• Sargasso Sea
• savanna
• schist
• scoria
• sea-floor spreading
• secondary atmosphere
• secondary crater
• sedimentary rock
• seismic wave
• serpentine
• shale
• shatter cone
• shield
• shield volcano
• sial
• siderite
• silica
• silicates
• sill
• silt
• Silurian Period
• sima
• sink hole
• slate
• Smith, William "Strata" (1769–1839)
• smithsonite
• Snowball Earth
• soapstone
• soil erosion
• South Pole
• spatter
• spatter and cinder cone
• spatter rampart
• sphalerite
• spinel
• spit
• spodumene
• spring
• stalactites and stalagmites
• Steno, Nicolaus (1638–1686)
• stibnite
• stishovite
• strait
• stratigraphic column
• stratigraphy
• stratovolcano
• stratum
• stromatolite
• Strombolian eruption
• Sudbury Crater
• subduction
• surface wave
• taconite
• taiga
• talc
• talus
• tectonic
• tectonic plate
• tectonism
• tektite
• tephra
• terracing
• thrust fault
• tidal heating
• till
• topaz
• topography
• tourmaline
• travertine
• Triassic Period
• troctolite
• troilite
• tsunami
• tuff
• turbidites
• uniformitarianism
• U-shaped valley
• Utopia Planitia
• valley
• vent
• viscuous relaxation
• volcanic ash
• volcanic block
• volcanic bomb
• volcanic dome
• volcanic explosivity index (VEI)
• volcanic gas
• volcanism
• volcano
• vulcanian eruption
• water cycle
• watershed
• wolframite
• young surface
• zeolite
• zircon
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