Txhua lub sij hawm, volcanoes instilled txoj kev ntshai rau tib neeg, tab sis muaj ntau thaj chaw uas cov neeg hauv zos raug yuam kom nyob sab ntawm sab ntawm cov kev phem loj heev. Los ntawm tsab xov xwm no koj yuav kawm tau qhov volcanoes yog cov coob tshaj plaws nyob rau Amelikas.
North America
Nyob rau hauv no ib sab ntawm lub teb chaws yog lub roob hluav taws, uas yog lub loj tshaj plaws ntawm lub ntiaj teb , thiab tsis yog nyob rau hauv North America. Nws yog hais txog Yellowstone caldera - lub roob hluav taws kub, nyob hauv lub xeev ntawm Wyoming, nyob hauv National Park. Nws qhov siab yog 2805 meters. Nws npog thaj tsam ntawm 3,960 square km, uas yog ib feem peb ntawm thaj chaw ntawm National Park. Qhov chaw no nyob rau saum qhov kub qhov chaw, qhov chaw ntawm lub pob zeb ntawm lub pob zeb ntawm lub mantle txav mus rau ntawm lub ntiaj teb. Niaj hnub no qhov chaw no yog dov los ntawm Yellowstone plateau, tab sis ntau xyoo dhau los nws yog nws uas nws tshwm sim los ntawm kev tsim ntawm sab hnub tuaj ntawm lub qis lowlands tom qab ib tug xov tooj ntawm loj eruptions ntawm volcano.
Cov kws tshawb fawb tau pom txog cov kab ntawm lub kwj deg ntawm no lub voj voog hluav taws kub hauv lub xyoo 1960, uas yog cov ntaub ntawv los ntawm satellite imagery. Nws muab tawm tias cov tshooj hauv qab plob yog tseem tuav ib qho npuas loj loj ntawm cov roj ntsha hauv nws lub plab. Qhov kub nyob hauv nws txawv li 800 degrees. Qhov no yog vim li cas los ntawm kab thaij sab hauv mus rau cov dej ntws tawm dej, thiab thermal springs yog rhuab, tso carbon dioxide thiab huab ntawm hydrogen sulfide.
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Raws li cov kws tshawb fawb, thawj thawj loj heev ntawm Yellowstone caldera tshwm sim ntau tshaj ob vam xyoo dhau los. Qhov no coj mus rau lub disintegration ntawm lub roob ranges, npog 25% ntawm ib ncig ntawm North America niaj hnub nrog ib txheej ntawm volcanic tshauv. Qhov thib ob lub sijhawm pib rov qab mus rau 1.27 lab xyoo ua ntej peb lub sijhawm, thiab tus thib peb tshwm sim 640,000 xyoo dhau los. Ces ib tug lossis loj round hollow nrog ib tug ib voos ncig ntawm 150 kis lus mev tau tsim, uas yog hu ua caldera. Qhov no tau tshwm sim vim qhov tsis ua hauj lwm ntawm lub vertex ntawm cov hluav taws kub super. Raws li cov kws tshawb fawb, qhov tshwm sim hais tias ib qho hluav taws xob muaj peev xwm tsa tau yog 0.00014%. Probability yog negligible, tab sis nws tshwm sim.
South America
Nyob rau hauv South America, qhov loj tshaj plaws lub roob hluav taws yog volcano Cotopaxi, nws qhov siab yog 5896 m2. Qhov thib ob qhov chaw belongs rau lub roob hluav taws Sangay (5,410 m), thiab tus thib peb mus rau Mev Popocatepetel (5452 meters). Lub Guinness Book of Records hais tias lub siab tshaj plaws hluav taws kub yog Ochos del Salado, nyob rau ntawm Argentine-Chilean ciam teb, tab sis nws yog suav tias yog tu noob. Nyob rau hauv tag nrho, nyob rau hauv South America muaj 194 loj thiab me me volcanoes, feem ntau ntawm cov uas yog extinct.
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