Lub foob pob hluav taws kub lossis lub foob pob lavayog pob zeb molten (tephra) loj dua 64 hli (2.5 ntiv tes) hauv txoj kab uas hla, tsim thaum lub roob hluav taws ejects viscous fragments ntawm lava thaum lub sij hawm tawg. Lawv txias rau hauv cov khoom tawg ua ntej lawv ncav cuag hauv av.
Nws hu li cas thaum lava nchuav tawm ntawm lub roob hluav taws?
A lava ntws yog ib qho tawm ntawm lava thaum lub sij hawm tawg tawg. Ntawm qhov tod tes, qhov tawg tawg ua rau muaj kev sib xyaw ntawm cov tshauv volcanic thiab lwm cov seem hu ua tephra, es tsis yog lava ntws.
Yuav ua li cas thaum lava tawm ntawm lub roob hluav taws?
Thaum lub roob hluav taws tawg, lub pob zeb molten (los yog magma) uas tawm hauv ntiaj teb hu ua lava. Vim lava kub heev (ntau tshaj 1, 100 ° C, tshaj 2, 000 ° F), nws tseem molten thiab ntws hla av kom txog thaum nws txias thiab tawv rau hauv pob zeb.
Pob hluav taws xob tua lava?
Vim nws sib zog dua cov pob zeb uas nyob ib ncig ntawm nws, magma nce thiab sau rau hauv magma chambers. Thaum kawg, qee qhov ntawm magma thawb los ntawm vents thiab fissures mus rau lub ntiaj teb nto. Magma uas tau tawg yog hu ua lava. … Thaum hom magma no tawg, nws ntws tawm ntawm lub roob hluav taws.
Thaum lava thiab tshauv tawm ntawm lub roob hluav taws hu ua?
Tsab ntawv F yog cov txheej ntawm tuff thiab lava. Thaum lub roob hluav taws kub hnyiab nws yuav eject lava, lava pob zeb thiab tshauv. Thaum stratovolcanoes tau tsim qee qhov lava thiab av tshauv thiab nyob rau ntawm lub roob hluav taws ua nws siab dua thiab siab dua nrog txhua qhov tawg. Cov tshauv tawv rau hauv pob zeb uas hu ua tuff.
