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Abidjan1 abrasion, fluvial44 abyss95 abyssal plain154 accretionary wedge215 Aconcagua291 active volcano348 activity, seismic402 Addis Ababa445 Adelaide488 AdΘlie Land532 Aden592 Aden, Gulf of631 Adriatic Sea664 Aegean Sea800 aerial photography847 Afghanistan903 Africa938 Agadir1075 agate1111 Agung1163 Alaska1199 Alaska Range1400 Alaska, Gulf of1439 Albania1473 Albert, Lake1508 albite1545 Aleutian Islands1608 Alexandria1719 alga1762 Algeria1875 Algiers1945 Alice Springs1988 alluvia2036 Almaty2087 Alps2126 Altai2383 Altiplano2461 altitude2548 aluminum2926 Alvin, submarine3048 Amazonia3110 amazonite3200 Amazon River3262 America, Central3401 Amery Ice Shelf3465 amethyst3525 ammonite3587 amphibian3659 Amur River3729 Amu Darya3806 Anchorage3845 Andaman Sea3903 Andes3938 Andorra4323 Angara River4358 Angel Falls4448 Angola4505 animal4538 Annapurna4773 Antananarivo4809 Antarctic4856 Antarctica4901 Antarctic Circle5063 Antarctic Peninsula5196 anticline5256 Antigua and Barbuda5332 Antilles5366 apatite5430 Apennines5482 Appalachians5521 Apulia5818 aquamarine5862 Arabia5924 Arabian Peninsula6020 Arabian Sea6060 Aral Sea6153 arch6277 Archaeozoic6328 archipelago6408 Arctic Circle6486 Arctic Ocean6601 Argentina6746 Argentino, Lake6885 Arica6923 Arkhangelsk6979 Armenia7024 Armenia (Colombia)7110 Asama7147 Ashgabat7185 Asia7223 Assal, Lake7322 asthenosphere7370 Astrakhan7544 Asunci≤n7589 Aswan7645 Atacama Desert7763 Athabasca, Lake7870 Athens7908 Atlantic Ocean7993 Atlas Mountains8301 atmosphere8376 atoll8439 atom8582 Auckland8644 Australia8688 Australian Bight, Great8938 Austria8971 Ayers Rock9006 Azerbaijan9049 azurite9084 backwash9199 Baffin Sea9255 Baghdad9289 Bahamas9328 Bahrain9418 Baikal, Lake9453 Baja California9581 Baku9644 Balaton, Lake9684 Bali9722 Balkans9797 Balkhash, Lake9856 Baltic Sea9948 Bam10026 Bangkok10064 Bangladesh10103 Bangweulu, Lake10171 Barbados10208 barchan10242 Barents Sea10281 barite10316 barrier reef10378 Barrier Reef, Great10471 basalt10551 base map10594 basin, drainage10646 basin, hydrographic10777 basin, sedimentary10829 Bath10931 bathyscaph Trieste10984 bathysphere11046 bayou11108 beach11221 Bear Lake, Great11311 Beaufort Sea11349 bedrock11383 Beijing11420 Belarus11455 BelΘm11489 Belgium11545 Belize11579 Belo Horizonte11675 belt, circum-Pacific11727 Bengal, Gulf of11829 Benguela Current11915 Benin11979 bergschrund12013 Bering Sea12063 Berlin12154 beryl12195 Bhutan12256 Bikini12291 biogenic rock12341 bird12386 Black Sea12533 Blanc, Mont12668 block, erratic12705 Bogotß12757 Bolivia12809 Bombay12893 boreal forest12928 Borneo12986 Bosnia-Herzegovina13027 Bosporus, Strait of13062 Boston13101 Bothnia, Gulf of13155 Botswana13239 Brahmaputra13272 Brahmaputra River13308 Brazil13347 breaker13481 Brisbane13523 British Columbia13567 British Isles13668 Brittany13714 Bromo13764 Brooks Range13805 Brunei13844 Budapest13877 Buenos Aires13921 Buenos Aires, Lake14011 Bulgaria14049 Burkina Faso14084 Burundi14118 C⌠te d'Ivoire14151 Cairo14185 calcite14228 calcium14441 Calcutta14566 caldera14601 California14745 California, Gulf of14933 Cambodia15030 Cambrian15101 Cambrian Period15181 Cameroon15250 Canada15284 Canadian Shield15583 Canary Islands15642 Cancer, Tropic of15760 canyon15833 Canyon, Grand15938 cape16001 Cape Horn16052 Cape Town16109 Cape Verde16216 Capricorn, Tropic of16250 Caracas16323 carbon16375 Carboniferous16429 Carboniferous Period16509 carbon 1416579 carbon dioxide16658 cardinal points16704 Caribbean sea16773 Caribbean Sea16837 Caroline Islands16896 Carpathians16945 cartographic convention17028 cartographic projection17146 cartography17209 Casablanca17354 Cascades mountain range17397 Casita volcano17478 Caspian Sea17536 cassiterite17661 Caucasus17723 cave17857 Cenozoic17943 Central African Republic18023 centrifugal force18056 Chad18107 Chad, Lake18140 Chalcidice18214 chalcopyrite18254 chalk18307 chamber, magma18401 chamber, magmatic18452 charcoal18527 Cherrapunji18572 Chersky Mountains18611 Chicago18651 Chile18768 Chillan18906 Chimborazo18943 China18992 China Sea, east19225 China Sea, South19278 China Sea, south19319 Chlef19379 chlorine19415 cinder19481 cinnibar19532 circum-Pacific belt19585 cirque, glacial19726 city19776 cliff20001 climate20240 cloud20523 coal20635 coast20748 coastal mountain20895 coastal mountain chain21022 coast, rocky21075 collision mountain21126 Cologne21202 Colombia21243 color21376 Colorado Plateau21630 Colorado plateau21693 Colorado River (Argentina)21817 Colorado (United States)21855 Columbia River21893 column21931 column, eruptive21977 comet22028 Comoros22091 compass22124 compass rose22187 congelifraction22256 Congo22302 Congo River22336 Congo, Democratic Republic of the22419 Congo, Democratic Republic of the 22469 conifer22502 Constance, Lake22684 continent22722 continental drift23324 continental plate23382 continental shelf23590 continental slope23651 contour line23712 convection current23855 convention, cartographic24030 convergence24148 Cook Strait24202 Cook, Mount24251 coordinates, Earth's24300 copper24413 coral24467 coral reef24536 Coral Reef, Great24584 Coral Sea24644 coral, barrier24776 core24824 Coriolis force24979 Corsica25044 corundum25091 Costa Rica25145 Cotopaxi25241 country25377 cove25408 crater25456 creep25594 crest25645 Cretaceous25687 Cretaceous Period25767 Crete25836 crevice25936 Croatia25986 crocoite26066 crust, continental26119 crust, Earth's26180 crust, ocean26490 crust, oceanic26553 crystal26741 crystal system26857 Cuba26919 current, convection27015 current, ocean27190 cyanobacterium27330 cycle of erosion27399 cycle of rocks27445 Cyprus27487 Czech Republic27567 Dⁿsseldorf27643 Dacca27684 Dakar27719 Dallas27766 dam27820 Danube River27864 Darling River27946 dating, absolute28024 dating, relative28103 Dead Sea28183 Death Valley28223 deforestation28281 Delhi28333 delta28368 Denmark28471 Denver28505 deposit, glacial28563 desert28633 detritic rock28909 Detroit28954 Devonian29008 Devonian Period29088 diagenesis29158 diamond29200 dinosaur29254 discontinuity29401 distributary river29463 divergence29514 divide, drainage29568 Djibouti29620 Dnieper River29653 Dniester River29735 dome29773 Dominica29848 Dominican Republic29882 Don River29916 Dorset29998 drainage basin30092 drainage divide30144 Drakensberg30196 drift, continental30332 Drift, North Atlantic30390 drumlin30448 Dubai30500 dune30560 dyke30711 dynamo effect30762 Earth30818 earth31320 earthflow31371 earthquake31422 Earth's inclination31701 Earth's rotation31751 east31816 eastern hemisphere31878 East China Sea31940 East Timor31975 Ecuador32008 Edward, Lake32141 effluent32178 effusive volcano32229 Egmont, Mount32285 Egypt32324 Elbert, Mount32483 Elbe River32546 Elbruz32584 Elbruz, Mount32624 Elburz Mountains32721 electromagnetic radiation32761 element, native32826 Ellsworth Mountains32880 El Chich≤n32940 El Salvador32977 emerald33011 emergence33073 Emi Koussi33140 energy33179 England33276 English Channel33420 Eocene33466 eon33546 epicenter33626 epoch33683 equator33763 equatorial forest33836 Equatorial Guinea33888 era33922 Erebus, Mount34002 erg34112 Erie, Lake34151 Eritrea34189 erosion34222 erosion, cycle of34637 erosion, fluvial34683 erosion, glacial34729 erratic block34825 eruption, volcanic34877 eruptive column35076 Erzincan35127 Essen35164 Estonia35205 estuary35239 Ethiopia35349 Ethiopian Highlands35382 Etna35460 Euphrates River35591 Eurasia35630 Europe35698 evaporation35791 Everest35842 exploration, underwater35878 explosive volcano36006 Eyre, Lake36062 facies36140 Falkland Islands36201 fall36290 fan36348 Faroe Islands36409 fault36510 Fault, San Andreas36778 feldspar36848 field, magnetic36944 Fiji36994 Filchner Ice Shelf37137 Finland37197 fish37344 fjord37492 floor, ocean37726 Florida38015 flower38117 fluorite38264 fluvial abrasion38379 fluvial erosion38430 Fly River38476 foam38513 force, centrifugal38555 force, Coriolis38606 force, gravitational38671 forest, equatorial38722 Fortaleza38774 fossil38826 France39078 Frankfurt39206 French Polynesia39247 freshwater39296 frost39445 Fujiyama39491 full moon39618 fumarole39668 Fundy, Bay of39770 Gabon39816 Gairdner, Lake39850 gallery39887 Galunggung39934 Gambia39970 Ganges40004 Ganges River40086 Garibaldi, Mount40125 garnet40188 gas40250 Gascogne, Gulf of40424 gems40458 Geneva, Lake40503 geodetic point40540 geographic map40596 geologic time40707 geomagnetism40836 Georgia40886 geothermy40921 Germany40971 geyser41048 Ghana41136 Gibraltar, Strait of41170 glacial erosion41255 glacial lake41351 glacial, lake41400 glacier41444 gneiss, granite41776 Gobi Desert41822 gold41861 Gondwana41974 Good Hope, Cape of42042 gorge42103 gour42303 Grampians42349 Grand Basin42388 Grand Canyon42434 granite42497 graphite42634 gravitational force42747 Great African Rift42798 Great Barrier Reef42950 Great Basin43030 Great Britain43093 Great Dividing Range43138 Great Dividing Range 6552=Carpentaria=Carpentaria,43228 Great Lakes43271 Great Salt Lake43378 Great Wall43483 Greece43521 Greenland43599 Greenland Sea43888 Greenwich meridian43922 Grenada44052 ground44148 groundwater44198 gryke44245 Guadalajara44291 Guadeloupe44345 Guatemala44379 Guatemala City44475 Guiana Highlands44564 Guinea44658 Guinea-Bissau44692 Guinea, Gulf of44726 Gulf Stream44805 Guyana44906 Guyana, French44940 guyot44974 gypsum45084 Haiti45197 hanksite45231 Hanoi45293 Havana45332 Hawaii45390 Hekla45671 hematite45708 Hibok-Hibok45820 high-tide45858 hill45908 Himalayas46002 Hindu Kush46401 Hoggar46475 Hokkaido46602 Holocene46746 Honduras46826 Honduras, Gulf of46860 Hong Kong46900 Honolulu46939 Honshu46983 Hormuz, Strait of47063 Horn, Cape47104 horst47161 hot pool47290 hot spot47343 hot spring47394 Houston47447 Huang He47501 Huaraz47629 Huascarßn47666 Hudson Bay47715 human47863 Hungary48010 Huron, Lake48087 hurricane48173 hypocenter48237 Iberian Peninsula48294 ice48340 iceberg48512 icecap48556 Iceland48657 ice age48956 ice sheet49075 igneous rock49178 Iguaτu Falls49221 Illampu49277 Ilopango49326 Imandra, Lake49363 Inari, Lake49401 inclination, Earth's49439 India49489 Indian Ocean49778 Indian Peninsula49973 Indochina Peninsula50013 Indonesia50053 Indus50177 Indus River50213 inlandsis50252 insect50341 intrusion50489 invertebrate50580 Iran50727 Iraq50762 Ireland50797 Irkutsk50877 iron50916 Irrawaddy51093 Irrawaddy River51141 Irtych River51180 island51270 Islands, Marshall51683 islet51716 isostasy51767 Israel51847 Issyk-Kul51919 Istanbul51958 Italy51997 jadeite52133 Jakarta52195 Jamaica52230 Japan52326 Japan Trench52557 Japan, Sea of52598 Java52672 Java Sea52713 Java Trench52746 Jerusalem52807 Johannesburg52846 Jordan52953 Juba River53025 Jungfrau53062 Jura53099 Jurassic53188 Jylland Peninsula53335 K253381 Kalahari Desert53468 Kamchatka53516 Kamchatka Mountains53647 Kangaroo Island53687 Kangchenjunga53730 Karachi53766 Karakoram53801 Kara Sea53926 Kashmir53961 Katmai53997 Katowice54084 Kazakhstan54125 Kelut54246 Kenya54282 Kenya, Mount54403 kettle54445 Keys54497 Khanka, Lake54537 Khartoum54576 Kiev54619 Kilauea54664 Kilimanjaro54768 Kinshasa54947 Kiribati54990 Kivu, Lake55070 Kobe55107 Kola Peninsula55184 Kolyma River55230 Komagatake55269 Korea, South55307 Kosciusko, Mount55342 Krakatau55385 Krakow55512 Kunlun55557 Kuril Islands55597 Kuwait55689 Kyrgyzstan55724 Kyushu55759 Labrador55800 Labrador Sea55840 laccolith55931 Ladakh55982 Ladoga, Lake56018 lagoon56100 Lagos56337 lahar56380 lake56436 Lakes, Great56762 lake, glacial56869 lake, tectonic56960 lake, volcanic57089 Laki57133 Lamington57170 landscape57206 landslip57342 Land, AdΘlie57393 Laos57453 lapilli57488 lapis lazuli57539 latitude57601 Latvia57674 Laurasia57708 lava57776 La Paz58088 Lebanon58144 legend58179 Leman, Lake58324 Lena River58362 Lengai58454 Lesotho58490 level, sea58523 Liberia58621 Libya58655 Liechtenstein58688 life58723 Lima58920 limestone59036 Limpopo River59170 line scale59207 Lisbon59276 lithosphere59317 lithospheric plate59433 Lithuania59830 littoral59864 Llullaillaco59969 Logan, Mount60018 Loire River60081 London60163 longitude60268 longshore drift60341 Lop Nur60394 Los Angeles60433 Louisiana60487 low-tide60600 Luanda60650 Luxembourg60693 Luzon60728 Lyon60769 Macedonia60813 Machu Picchu60848 Mackenzie River60904 Madagascar60999 Madeira River61078 Madras61130 Madrid61169 Magdalena River61210 magma61248 magmatic chamber61629 magmatic rock61704 magmatism61747 magma chamber61789 magnesium61840 magnet61966 magnetic field62022 magnetic North Pole62072 magnitude62136 Mai-NdombΘ, Lake62189 malachite62226 Malaren, Lake62281 Malawi62319 Malawi, Lake62352 Malawi, lake62429 Malaysia62473 Maldives62589 Mali62764 Malta62797 mammal62832 Mammoth Cave62979 Managua63026 Manaus63119 Manila63259 mantle63294 Maoke Mountains63553 map63591 map background63654 map, geographic63716 map, meteorological63827 map, physical63882 map, thematic63960 map, topographic64009 Maracaibo, Lake64081 marble64174 Mariana Trench64220 Maroon Bells64337 Marrakech64400 marsh64447 Marshall Islands64681 marsh, salt64730 Martinique64796 Massif Central64937 material64983 matter65029 Matterhorn65090 Mauna Loa65127 Mauritania65164 Mauritius65197 Mayon65230 Mazuma, Mount65268 McDonnell Mountains65305 McKinley, Mount65344 meander65407 Medellφn65458 Mediterranean Sea65510 Mekong River65635 Melanesia65712 Melbourne65761 Mercalli scale65805 Mercator, Gerard65858 meridian65935 meridian, Greenwich66146 mesosaurus66276 mesosphere66411 Mesozoic66464 Messina66544 metal66581 metamorphic rock66684 metamorphosis66730 meteorite66772 meteorological map66902 Mexico66957 Mexico City67154 Mexico, Gulf of67191 mica67287 Michigan, Lake67383 Micronesia67469 Midnight Sun67549 Mid-Atlantic Ridge67611 Milan67737 Milky Way67778 Mindanao67848 mineral67889 Miocene67984 Mirim, lagoon68064 Mississippi River68102 Missouri River68252 Mogadishu68345 Moher68392 Mohs scale68440 Moldavia68494 mollusk68529 Moluccas68598 Monaco68639 Mongolia68674 monolith68742 monsoon68829 Monterrey68914 Montreal68968 Mont Blanc69086 Moon69123 moraine69174 Morocco69266 Moscow69381 mountain69422 Mountains, Sayan69708 mountain range69748 mountain, coastal70153 mountain, collision70206 mountain, old70282 mountain, subduction70377 mountain, young70512 mouth70565 Mozambique70675 Mozambique Channel70708 mud70787 mudflow70894 Murray River70945 Musandam Peninsula71023 Mweru, Lake71064 Myanmar71101 Namibia71182 Namib Desert71215 Nansen Basin71262 Nantaisan71323 Naples71361 native element71452 Nauru71506 neap tide71586 nebula, solar71636 needle71706 Negro, Rio71798 Nelson River71850 Nepal71888 Netherlands72073 Nettiling, Lake72150 Nevada72188 Nevado del Ruiz72246 Newfoundland72330 New Caledonia72445 New Guinea72571 New Hebrides72659 New Mexico72707 new moon72753 New York72803 New Zealand72857 New Zealand Alps73093 Ngorongoro volcano73131 Niagara Falls73178 Niamey73236 Nicaragua73283 Nicaragua, Lake73379 nickel73479 Niger73649 Nigeria73682 Niger River73716 Nile73790 Nile River73838 north73930 northern hemisphere74058 North America74119 North Atlantic Drift74440 North Island74498 North Korea74547 North Pole74582 North Sea74717 Norway74852 Norwegian Sea75028 Noumea75119 Nubia75167 Nuuk75206 Nyiragongo75264 Nyos, Lake75303 oasis75339 Ob River75420 ocean75548 Oceania76319 oceanic crust76358 oceanic plate76487 oceanic ridge76563 oceanic trench76740 ocean crust76798 ocean current76861 ocean floor77001 Ocean, Atlantic77290 oil77348 Ojos del Salado77386 Okavango Delta77435 Okavango River77474 Okhotsk, Sea of77511 Oleniok River77546 Oligocene77585 olivine77665 Oman77727 Onega, Lake77762 Ontario, Lake77800 Orange River77838 Ordovician77875 Orinoco78022 Orinoco River78079 orogenesis78117 orogeny78174 orpiment78241 Osaka78294 Oshima78329 Oslo78367 Ouagadougou78412 Outback78459 oxbow lake78506 oxygen78550 Pacific Ocean78802 Paijanne, Lake79032 Pakistan79070 Palau79163 Paleocene79196 paleomagnetism79276 Paleozoic79336 Pamir79416 Pampa79456 Panama79512 Panama Canal79546 Panama, Isthmus of79610 Pangaea79674 Pantanal79887 Panthalassa79943 Papandayan80011 Papua New Guinea80047 Papua-New Guinea80080 Paraguay80177 parallel80316 Paranß80464 Paranß River80521 Paris80610 Parnaφba River80689 Patagonia80727 pebble80783 Pechora River80838 Peipus, Lake80876 PelΘe, Mount80914 peneplain81064 Peninsula, Antarctic81110 period81170 Permian81250 Permian Period81330 Persian Gulf81399 Perth81530 Peru81574 Phanerozoic81658 Philadelphia81738 Philippines81792 Philippines Sea82035 Philippine Trench82070 physical map82128 Pielinen, Lake82206 Pilat dune82244 Pinatubo82299 Pinnacles82475 Piton de la Fournaise82518 plain82554 plain, abyssal82741 planet82802 plant82921 Plata, Rio de la83242 plateau83295 plate tectonics83481 plate, continental83538 plate, converging83746 plate, diverging83816 plate, lithospheric83886 plate, oceanic84283 plate, transform84359 playa84429 Pleistocene84468 Pliocene84548 plutonic rock84628 point, geodetic84671 Poland84727 polarity84804 polar orbit84864 polder84919 pole84964 Polynesia85037 pond85145 Poop≤, Lake85211 PopocatΘpetl85249 Popocatepetl85301 population85338 Porto Alegre85597 Portugal85649 Port Moresby85770 potassium85818 pothole85943 Poyang, Lake85989 Po River86028 prairie86065 Precambrian86181 Precambrian Period86261 precious stone86385 precipitation86490 pressure86717 prime meridian86899 progradation, coast of86972 projection, cartographic87027 Proterozoic87090 protoplanet87170 Puerto Rico87240 Puerto Rico Trench87336 Pyrenees87453 pyrite87610 Qatar87672 Qinghai, Lake87707 quartz87746 quartzite87905 Quaternary87951 Quaternary Period88031 Quebec88100 Quetta88158 Rabat88196 Rabaul88243 radar88279 Radarsat, satellite88343 radiation, electromagnetic88398 radiation, solar88463 radio wave88528 rain88592 Rainier, Mount88655 rainwater88718 range, mountain88858 ravine89263 ray, Sun's89309 Recife89353 Red Sea89405 reef89475 Reef, Great Barrier89526 reg89606 Reindeer, Lake89645 relief89683 remote sensing90065 reptile90117 reservoir90265 resurgence90309 Reunion Island90355 Reykjavik90388 Rh⌠ne River90433 Rhine River90470 rhodonite90543 ria90605 Richter scale90653 ridge oceanic90706 Ridge, Mid-Atlantic90760 ridge, oceanic90886 rift91115 Rift, Great African91234 Rio de Janeiro91346 Rio de la Plata91398 Rio Grande91487 Rio Negro91525 river91665 riverbank92037 Riyadh92132 road92171 rock92290 rockslide92662 rocks, cycle of92713 rocky coast92755 Rocky Mountains92868 rock salt93272 rock, biogenic93317 rock, detritic93362 rock, igneous93407 rock, magmatic93450 rock, metamorphic93493 rock, plutonic93539 rock, sedimentary93582 rock, volcanic93740 Romania93996 Rome94031 Rond⌠nia94140 Ross Ice Shelf94180 Ross Sea94283 rotation, Earth's94386 Rovaniemi94451 Ruapehu, Mount94524 runoff94623 Russia94669 Rwanda94850 Sahara94883 Sahel95082 Saimaa, Lake95158 Saint Kitts and Nevis95196 salinity95230 Salouen River95383 salt95422 salt marsh95611 Samoa95677 sand95757 sandstone96048 Sandy Desert, Great96134 Santa Maria96177 Santiago96214 Santorini96266 Santo Domingo96303 San Andreas Fault96367 San Diego96437 San Francisco96491 San Marino96643 San Salvador96678 Sπo Francisco River96730 Sπo Paulo96768 Sπo TomΘ and Prφncipe96820 sapphire96854 Sardinia96908 satellite96955 Saudi Arabia97045 savanna97080 scale97122 scale, Mercalli97190 scale, Mohs97243 scale, Richter97297 Scandinavia97350 Scandinavian Mountains97394 scolecite97529 Scoresby97590 Scotland97647 sea97748 seafloor98082 seawater98247 sea level98313 Sea, Caribbean98799 sediment98833 sedimentary basin99214 sedimentary rock99316 sedimentation99474 Seine99516 seismic activity99556 seismic wave99599 seismogram99651 seismograph99701 selenite99751 Senegal99803 Senegal River99882 SΘnΘgal River99919 sensor99958 serac100013 Serbia and Montenegro100063 Seville100098 sextant100143 Seychelles100209 Shanghai100242 shark100379 shelf, continental100453 shell100514 shield100569 Shikoku100698 Shinkai, submersible100739 shock wave100801 shore100907 shoreline101054 Siberia101193 Sicily101323 Sierra Leone101408 Sierra Madre101442 Sierra Nevada (Spain)101542 Sierra Nevada (United States)101581 silicon101732 sill101906 Silurian101957 Silurian Period102037 silver102107 Sinai102220 Singapore102259 sinkhole102331 Skopje102421 slate102458 Slave Lake, Great102504 slope, continental102542 Slovakia102603 Slovenia102681 snow102716 sodium102822 Sognefjord102947 soil102993 solar radiation103122 Solar system103187 Solim⌡es103248 Solim⌡es River103300 Solomon Islands103352 solstice, summer103432 solstice, winter103505 Somalia103578 sonar103660 Sonde Islands103724 SoufriΦre103763 south103800 southern hemisphere103861 South Africa103922 South America104223 South China Sea104338 South Island104373 South Korea104422 South Pole104457 space104588 space shuttle104625 Spain104676 sponge104755 spring104824 spring tide104875 Sri Lanka104925 SRTM104997 stalactite105048 stalagmite105094 star105140 steam105210 Stonehenge105309 stone, precious105354 stratigraphic layer105399 stratum105479 streak105559 stream, mountain105612 stromatolite105663 Stromboli105732 St. Helens, Mount105833 St. Lawrence River106036 St. Lawrence, Gulf of106186 St. Lucia106220 St. Petersburg106254 St. Vincent and the Grenadines106358 subduction106392 subduction mountain106600 submarine106735 Sudan106797 Sulawesi106830 sulfur106871 Sumatra106997 summer107038 summer solstice107100 Sun107173 sunlight107452 Sun's ray107514 Superior, Lake107558 Suriname107701 Suva107735 Swaziland107783 Sweden107816 swell107850 swell, tidal107990 Switzerland108036 Sydney108106 symbol108150 Syria108279 Syr Darya108314 system, crystal108353 system, Solar108415 Taal108476 table, water108514 Tage River108558 Tahiti108639 Taimyr, Lake108688 Taiwan108727 Tajikistan108813 Tajumules108848 Taklamakan Desert108912 talc108951 talus109005 Tambora109056 Tana, Lake109092 Tanganyika, Lake109129 Tangshan109254 Tanzania109292 Tarim River109532 Tasmania109571 Tasman Sea109709 Tatras109841 Taupo109886 Taupo, Lake109922 Taurus109959 Tbilissi110036 tectonics, plate110075 tectonic lake110132 Teheran110261 Tehuantepec, Isthmus of110300 temperature110364 Terra, satellite110867 Tertiary110922 Tertiary Period111002 Thailand111071 Thailand, Gulf of111143 thaw111203 thematic map111295 theodolite111344 thermocline111400 Tian Shan111465 Tibesti111505 Tibet111580 Tibet, plateau of111616 tidal wave111656 tide111697 tide, neap111973 tide, spring112023 Tierra del Fuego112073 time112168 time zone112218 time, geologic112268 titanite112397 Titicaca, Lake112459 Tocantins River112552 Togo112590 Tokyo112624 tombolo112695 Tonga112750 topaz112830 topographic map112892 Toronto112964 Torrens, Lake113018 tourmaline113055 Transantarctic Mountains113117 transparency113234 tree113286 trench, oceanic113410 Triassic113468 Triassic Period113548 tributary113617 tributary river113669 Trieste, bathyscaph113769 Trinidad and Tobago113831 Tropic of Cancer113865 Tropic of Capricorn113938 trough114011 trough, glacial114053 tsunami114105 tundra114146 Tunisia114204 Turkana, Lake114282 Turkestan114319 Turkey114359 Turkmenistan114530 turquoise114565 Tuvalu114680 typhoon114760 Uganda114808 Ukraine114889 Ulan Bator114923 ultrasound wave114962 Ulu, Lake115026 underground river115064 undertow115110 underwater exploration115152 United Arab Emirates115280 United Kingdom115315 United States115349 unit cell115691 universal time115747 Unzen115806 Urals115844 Ural River115978 Urmia, Lake116017 Uruguay116056 Uruguay River116090 Urumtsi116128 Ushuaia116167 Uvs Nuur116223 Uyuni Lakes116262 Uzbekistan116302 ValdΘs Peninsula116337 valley116394 Valley, Death116583 Vancouver116641 Vancouver Island116699 VΣnern, Lake116762 Vanern, Lake116808 Vanuatu116846 Van, Lake116926 Varanasi116965 Vatnaj÷kull117004 Vattern, Lake117056 vegetation117094 Venezuela117209 Venice117293 vertebrate117337 vesuvianite117484 Vesuvius117546 Vichy117678 Victoria Desert, Great117731 Victoria Falls117774 Victoria, Lake117822 Vietnam117953 Vinson, Mount117988 Vladivostok118048 volcanic bomb118087 volcanic eruption118138 volcanic lake118240 volcanic rock118284 volcanism118540 volcano118623 volcano, active119149 volcano, effusive119203 volcano, explosive119259 Volga River119315 Volta River119445 Wall, Great119482 Washington119520 water119574 watercourse119922 waterfall120044 water table120095 water, cycle of120139 wave120190 wavelength120457 wave, seismic120499 wave, shock120551 Weddell Sea120603 wedge, accretionary120720 Wegener, Alfred120796 west120854 western hemisphere120916 West Indies120978 Whitehorse121031 Whitney, Mount121089 Wilhelm, Mount121152 wind121201 wind, prevailing121287 Winnipegosis, Lake121351 Winnipeg, Lake121389 winter121427 winter solstice121532 world ocean121605 Xi Jiang121666 Yangzi Jiang121705 Yellowstone Park121832 Yellow Mountains121882 Yellow River121920 Yellow Sea121973 Yemen122044 Yenesey River122079 Yosemite122207 Yucatßn122250 Yukon River122314 Zagros122352 Zambezi122430 Zambezi River122472 Zambia122509 Zimbabwe122542 zircon122575 zone, time122637