Seafloor sediments yog dab tsi?
Seafloor sediments yog dab tsi?

Video: Seafloor sediments yog dab tsi?

Video: Seafloor sediments yog dab tsi?
Video: Ocean Sediments 2024, Kaum ib hlis
Anonim

Dej hiav txwv Floor Sediments . Muaj peb hom hiav txwv pem teb sediment : terrigenous, pelagic, thiab hydrogenous. Zoo heev sediment yog muab los ntawm thaj av thiab feem ntau tso rau ntawm lub txee sab av loj, sab av loj nce, thiab qhov tob tob tob. Nws yog ntxiv contoured los ntawm muaj zog tam sim no nyob rau hauv lub continental nce.

Tsis tas li ntawd, vim li cas cov av hauv qab hiav txwv tseem ceeb?

Sediments yog heev tseem ceeb rau cov kws tshawb fawb txog dej hiav txwv rau ob qho laj thawj: (1) lawv muab cov lus qhia rau kev nthuav tawm cov lus tsis meej ntawm lub ntiaj teb yav dhau los thiab (2) lawv muab ntau yam kev pabcuam uas peb siv niaj hnub suav nrog roj, khoom siv hauv tsev, ntsev rau zaub mov, thiab lwm yam.

Qhov thib ob, dab tsi yog ib qho piv txwv ntawm terrigenous sediment? Terrigenous sediment . Qhov chaw ntawm terrigenous sediments suav nrog volcanoes, huab cua ntawm pob zeb, cua-tshuab plua plav, sib tsoo los ntawm glaciers, thiab sediment nqa los ntawm cov dej ntws los yog dej khov.

Ib sab saum toj no, lub hiav txwv yog dab tsi?

Oceanic crust yog txheej saum toj kawg nkaus ntawm dej hiav txwv ntawm ib daim phaj tectonic. Nws yog muaj li ntawm lub sab sauv dej hiav txwv crust, nrog rau hauv ncoo lavas thiab ib tug dike complex, thiab lub sab dej hiav txwv crust, muaj li ntawm troctolite, gabbro thiab ultramafic cumulates. Lub crust overlies lub solidified thiab topmost txheej ntawm lub mantle.

4 hom sediments yog dab tsi?

Muaj plaub hom marine sediments, Lithogenous, biogenous , hydrogenous thiab cosmogenous . Lithogenous yog los ntawm thaj av, lawv tsim los ntawm cov txheej txheem huab cua thiab muaj cov khoom me me los ntawm cov pob zeb weathered thiab volcanic.

Pom zoo: