Video: Ib qho piv txwv ntawm glaciation yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Lub ntsiab txhais ntawm a dej khov yog ib qho loj loj ntawm cov dej khov thiab cov daus uas ua rau cov daus sib sau ua ke sai dua li nws melts thiab ntws nrog dej hla ib cheeb tsam ntawm thaj av. Ib piv txwv ntawm a dej khov yog Perito Moreno hauv Patagonia.
Tsis tas li ntawd, qee qhov piv txwv ntawm glaciers yog dab tsi?
- Lub Antarctic. Nrog rau Greenland, Antarctic muaj 99% ntawm tag nrho lub ntiaj teb cov dej khov.
- Eqi Glacier, Greenland. Lwm qhov hnyav hitter hauv lub ntiaj teb glacial.
- Glacier National Park, Montana, USA.
- Quelccaya Ice Cap, Peru.
- Fox thiab Franz Josef, New Zealand.
- Pasterze, Austria.
- Perito Moreno, Argentina.
- Hubbard, Alaska, USA.
Tsis tas li ntawd, cov txheej txheem ntawm glaciation yog dab tsi? Muaj ob lub ntsiab txheej txheem ntawm glacial kev yaig. Plucking yog kev yaig thiab thauj cov pob zeb loj loj uas lo rau thiab khaws los ntawm dej khov . Abrasion yog qhov yaig uas tshwm sim thaum cov khoom sib tsoo sib tsoo. Nws ua haujlwm zoo ib yam li cov ntawv xuab zeb.
koj txhais li cas los ntawm glaciation?
npe. Ib qho kev nthuav dav ntawm cov dej khov ua los ntawm cov daus ntog thiab sib sau ua ke ntau xyoo thiab txav mus qeeb heev, txawm tias nqis los ntawm roob siab, xws li hauv hav. dej khov , los yog tsiv tawm sab nraud los ntawm cov chaw sib sau ua ke, xws li nyob rau hauv continental dej khov.
Puas muaj pov thawj tias glaciations tshwm sim?
Xws li erratics muab pov thawj ntawm glacial flow kab. Piv txwv xws li omars, jasper conglomerates, thiab tilites. Lwm yam pov thawj rau glaciation tau sau tseg rau ntawm qee qhov chaw bedrock hauv qab lub glacial drift. Kos ua los ntawm pob zeb khov rau hauv basal ice scraping hla lub bedrock yog hu ua striae.
Pom zoo:
Ib qho piv txwv ntawm ib qho alloy yog dab tsi?
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