Tshwj xeeb, dej hiav txwv trench yog ib qho ntawm cov phaj sib koom ua ke, qhov twg ob lossis ntau daim phiaj sib ntsib. Ntawm ntau thaj tsam ntawm cov phaj sib txuas, ntom lithosphere melts lossis swb hauv qab lithosphere tsawg-densehauv cov txheej txheem hu ua subduction, tsim kom muaj lub trench.
Yuav ua li cas trench?
Trenches yog tsim los ntawm subduction, txheej txheem geophysical uas ob lossis ntau dua ntawm lub ntiaj teb daim phiaj sib koom ua ke thiab cov laus dua, cov phaj denser raug thawb hauv qab lub phaj sib zog thiab tob rau hauv mantle, ua rau cov seafloor thiab sab nraud crust (lub lithosphere) khoov thiab tsim ib tug ntxhab, V-shaped kev nyuaj siab.
Yuav ua li cas lub trench tsim yooj yim?
Dej hiav txwv trenches yog ntuj tectonic phaj ciam teb ntawm ob daim phiaj crustal. Thaum ib lub phaj teb chaws converges nrog ib tug dej hiav txwv phaj ib subduction cheeb tsam daim ntawv. Lub phaj dej hiav txwv hnyav dua subducts hauv qab lub phaj continental sib dua ua ib lub trench.
trenches thiab Islands tuaj li cas?
Kev txav ntawm ob daim phiaj lithospheric piav qhia txog cov yam ntxwv tseem ceeb ntawm cov kob active arcs. Cov kob arc thiab me me dej hiav txwv phiab yog nyob rau ntawm lub overlying phaj uas ua tau raws li tus nqis los phaj uas muaj ib txwm dej hiav txwv crust raws Benioff cheeb tsam. Txoj kev nkhaus ntawm daim phiaj dej hiav txwv nqes mus ua ib qho trench
Dej hiav txwv ridges thiab trench tsim li cas?
Plag: Cov ntug dej hiav txwv nruab nrab yog thaj chaw ntawm kev sib cais qhov twg ob daim phiaj tectonicyog sib txawv ntawm ib leeg. … Rifting tsim tshiab crust. Kev sib sib zog nqus dej hiav txwv trenches yog tsim nyob rau ntawm convergent phaj ciam teb qhov twg cov phaj tuab dua (feem ntau yog dej hiav txwv) subducts nyob rau hauv qhov tsawg ntom (feem ntau continental).
