Cov yam ntxwv dab tsi muaj nyob ntawm thaj tsam sib txawv?
Cov yam ntxwv dab tsi muaj nyob ntawm thaj tsam sib txawv?

Video: Cov yam ntxwv dab tsi muaj nyob ntawm thaj tsam sib txawv?

Video: Cov yam ntxwv dab tsi muaj nyob ntawm thaj tsam sib txawv?
Video: Saib Mis paub Poj niam (hluas nkauj) tus yam ntxwv lub siab 2024, Kaum ib hlis
Anonim

Cov teebmeem uas yog pom ntawm a ciam teb sib txawv nruab nrab ntawm daim phiaj dej hiav txwv muaj xws li: lub roob submarine xws li Mid-Atlantic Ridge; volcanic kev ua si nyob rau hauv daim ntawv ntawm fissure eruptions; av qeeg dej ntiav; kev tsim cov dej hiav txwv tshiab thiab cov dej hiav txwv dav dav.

Kuj nug, cov ntawv dab tsi ntawm ib thaj tsam sib txawv?

nquag nquag sib txawv phaj ciam teb tshwm sim ntawm daim phiaj dej hiav txwv thiab muaj nyob rau hauv nruab nrab-oceanic ridges. Cov ciam teb sib txawv kuj daim ntawv volcanic Islands tuaj, uas tshwm sim thaum cov phiaj sib nrug los tsim qhov khoob uas cov lava molten nce mus sau.

Ib sab saum toj no, cov yam ntxwv dab tsi tuaj yeem pom ntawm Transform phaj ciam teb? Hloov ciam teb yog qhov chaw daim hlau swb sab dhau ib leeg. Ntawm hloov ciam teb lithosphere tsis yog tsim los yog rhuav tshem. Ntau hloov ciam teb yog pom nyob rau hauv lub hiav txwv pem teb, qhov twg lawv txuas ntu ntawm diverging mid-ocean ridges. California lub San Andreas txhaum yog a hloov ciam teb.

Qhov thib ob, yuav ua li cas tshwm sim ntawm cov ciam teb sib txawv?

A ciam teb sib txawv yog ib qhov chaw uas cov convection tam sim no nyob rau hauv lub mantle txav upwards. Qhov no upwelling ntawm magma splits thiab thawb lub ntiaj teb crust sib nrug. Divergent ciam teb tshwm sim ntawm mid hiav txwv ridges. Tshiab crust yog tsim nyob rau hauv nruab nrab dej hiav txwv ridges sib cais ua ob daim hlau tectonic sib txawv.

Yuav ua li cas yog cov piv txwv ntawm divergent ciam teb?

Piv txwv ntawm cov ciam teb sib txawv yog Mid-Atlantic Ridge thiab Great Rift Valley. Iceland yog ib qho piv txwv ntawm ib lub teb chaws undergo ib continental ciam teb sib txawv . Lub Mid-Atlantic Ridge faib Iceland thiab yog ciam teb nruab nrab ntawm North American thiab Eurasian tectonic daim hlau.

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