Video: Yuav ua li cas tiv thaiv volcano erupt?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Shield Volcanoes . Kev tawg ntawm thaiv volcanoes yog Tsuas yog tawg yog dej qee yam nkag mus rau hauv lub qhov cua, txwv tsis pub lawv yog Tus cwj pwm los ntawm kev tawg qis qis uas tsim cov cinder cones thiab spatter cones ntawm lub qhov cua, txawm li cas los xij, 90% ntawm cov volcano yog lava ntau dua li cov khoom siv pyroclastic.
Nyob rau hauv no hais txog, dab tsi ua rau shield volcanoes tawg?
Shield volcanoes yog tsim los ntawm lava ntws ntawm qis viscosity - lava uas ntws yooj yim. Yog li ntawd, a roob hluav taws roob uas muaj qhov dav dav yog tsim los ntawm lub sijhawm los ntawm kev ntws tom qab ntws ntawm cov kua dej basaltic lava tawm los ntawm cov vents lossis fissures ntawm qhov chaw. roob hluav taws.
Ib yam li ntawd, muaj pes tsawg Shield volcanoes nyob hauv lub ntiaj teb? Tam sim no, nyob ntawd yog hais txog 600 roob hluav taws uas tau paub txog kev tawg thaum lub sijhawm sau keeb kwm, thaum txog 50-70 roob hluav taws muaj active (erupting) txhua xyoo. Thaum twg los tau, nyob ntawd yog qhov nruab nrab ntawm txog 20 roob hluav taws uas erupting.
Tsis tas li ntawd nug, cov ntaub thaiv npog volcanoes nyob qhov twg?
Shield volcanoes muaj nyob thoob ntiaj teb. Lawv tuaj yeem tsim cov hotspots (cov ntsiab lus uas magma los ntawm hauv qab ntawm qhov dej ntws), xws li Hawaiian-Emperor seamount chain thiab Galápagos Islands, lossis tshaj qhov chaw sib cais ntau dua, xws li Icelandic. ntaub thaiv npog thiab cov tiv thaiv volcanoes ntawm East Africa.
Yuav ua li cas yog ib tug composite volcano erupt?
Qhov tseem ceeb feature ntawm a volcano sib xyaw yog ib qho kev sib txuas ntawm cov kav dej uas cov magma los ntawm lub reservoir sib sib zog nqus hauv ntiaj teb lub pob zeb nce mus rau saum npoo. Cov roob hluav taws yog tsim los ntawm tsub zuj zuj ntawm cov khoom tawg los ntawm cov kav dej thiab nce qhov loj me li lava, cinders, tshauv, thiab lwm yam, ntxiv rau nws qhov chaw siab tshaj.
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Vim li cas cov tshuaj tiv thaiv kev zom zaub mov hu ua hydrolysis cov tshuaj tiv thaiv?
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Yuav ua li cas koj ua ib tug qauv volcano erupt?
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