Video: Seafloor sediments yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
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:
Yuav ua li cas rau cov dej hiav txwv Yog hais tias subduction yog ceev tshaj seafloor kis?
Subduction tshwm sim qhov twg tectonic daim hlau tsoo rau ib leeg es tsis txhob sib nrug. Ntawm thaj chaw subduction, ntug ntawm cov phaj denser subducts, los yog swb, hauv qab qhov tsawg-dense. Cov khoom siv lithospheric denser ces yaj rov qab rau hauv lub ntiaj teb lub mantle. Seafloor nthuav dav tsim cov crust tshiab
Qhov twg yog New seafloor puas lawm?
Ib qho chaw nto moo tshaj plaws yog hu ua Mid-Atlantic Ridge thiab nws khiav mus rau sab qaum teb mus rau sab qab teb raws nruab nrab ntawm Dej Hiav Txwv Atlantic. Yog li tshiab dej hiav txwv crust yog tsim nyob rau hauv 'middle' oceans nyob rau hauv Mid Ocean Ridges, thiab nws tau puas lawm qhov twg dej hiav txwv crust ntsib lwm tectonic ciam teb thiab subducts
Peb hom sediments yog dab tsi?
Muaj peb hom sediment, thiab yog li ntawd, sedimentary pob zeb: clastic, biogenic, thiab tshuaj, thiab peb sib txawv ntawm peb raws li cov fragments uas tuaj ua ke los tsim lawv. Cia peb saib thawj hom hais, uas yog clastic. Clastic sediments yog tsim los ntawm cov pob zeb tawg
Dab tsi yog qhov txawv ntawm continental drift seafloor kis thiab phaj tectonics?
Continental drift txoj kev xav tau tsim los piav qhia tias kev sib kis hauv hiav txwv yuav tsum cuam tshuam li cas rau sab av loj. Phaj Tectonic txoj kev xav tau tsim los piav qhia qhov chaw ntawm dej hiav txwv trenches, volcanoes thiab qhov chaw ntawm ntau hom av qeeg
Quaternary sediments yog dab tsi?
Quaternary pob zeb thiab sediments, yog qhov tam sim no nteg geologic strata, tuaj yeem pom ntawm lossis ze ntawm lub ntiaj teb hauv hav thiab hauv cov tiaj tiaj, ntug hiav txwv dej, thiab txawm hauv hiav txwv. Cov deposits no tseem ceeb heev rau unraveling geological keeb kwm vim hais tias lawv yog yooj yim tshaj piv rau niaj hnub sedimentary deposits