Dab tsi yog cov yam ntxwv ntawm cov volcanoes sib xyaw?
Dab tsi yog cov yam ntxwv ntawm cov volcanoes sib xyaw?

Video: Dab tsi yog cov yam ntxwv ntawm cov volcanoes sib xyaw?

Video: Dab tsi yog cov yam ntxwv ntawm cov volcanoes sib xyaw?
Video: 3/16/23. Hmoob Sib Tua Tuag Nyob Minnesota/Chim Sithar Raug Ntes/Nplog Txwv Kev Tuaj Tsiaj. 2024, Kaum ib hlis
Anonim

Composite volcanoes muaj alternating txheej ntawm tshauv thiab lava ntws. Kuj tseem hu ua strato roob hluav taws , lawv cov duab yog symmetric cone nrog ntxhab sab uas nce siab li 8,000 ko taw. Lawv tsim raws lub ntiaj teb subduction zones qhov twg ib lub phaj tectonic thawb rau hauv qab.

Kuj paub, dab tsi ua rau lub roob hluav taws sib xyaw?

Lub stratovolcano, tseem hu ua a volcano composite , yog conical roob hluav taws tsim los ntawm ntau txheej (strata) ntawm hardened lava, tephra, pumice thiab tshauv. Lub lava ntws los ntawm stratovolcanoes feem ntau txias thiab tawv ua ntej sib kis mus deb, vim muaj viscosity siab.

Lub roob hluav taws sib xyaw zoo li cas? Tsis zoo li daim ntaub thaiv roob hluav taws uas yog tiaj thiab dav, volcanoes sib xyaw yog siab, symmetrically zoo li tus, nrog ntxhab sab, qee zaum nce 10,000 feet siab. Lawv tsim los ntawm cov txheej txheej ntawm cov lava ntws, roob hluav taws tshauv, cinders, blocks, thiab foob pob.

Raws li txoj cai, dab tsi yog cov yam ntxwv ntawm stratovolcano?

A stratovolcano Nws yog ib tug siab, conical volcano muaj li ntawm ib txheej ntawm hardened lava, tephra, thiab volcanic tshauv. Cov volcanoes no yog tus cwj pwm los ntawm qhov tob tob thiab ntu ntu, tawg tawg. Lub lava uas ntws los ntawm lawv yog cov khov heev, thiab txias thiab tawv ua ntej yuav kis mus deb heev.

Nyob qhov twg yog cov volcanoes sib xyaw?

Composite volcanoes feem ntau pom nyob rau ntawm qhov chaw puas tsuaj. Piv txwv ntawm cov volcanoes sib xyaw suav nrog Mount Fuji ( Nyiv ), Mount St Helens (USA) thiab Mount Pinatubo (Philippines).

Pom zoo: