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Video: Yuav ua li cas glaciers tsim los ntawm deposition?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Glacial deposition yog qhov kev daws teeb meem ntawm sediments tshuav tom qab los ntawm kev txav mus los dej khov . Raws li dej khov txav mus rau thaj av, lawv khaws cov pob zeb thiab pob zeb. Qhov sib tov ntawm unsorted sediment deposits nqa los ntawm lub dej khov hu ua glacial mus txog. Piles ntawm mus tso nyiaj raws cov ntug yav dhau los dej khov hu ua moraines.
Hauv qhov no, dab tsi yog tsim los ntawm glacial deposition?
U-puab hav, dai kwj ha, cirques, horns, thiab aretes yog cov yam ntxwv sculpted los ntawm dej khov. Cov khoom eroded yog tom qab tso nyiaj raws li loj glacial nyob rau hauv moraines, stratified drift, outwash plains, thiab drumlins. Varves yog qhov muaj txiaj ntsig zoo txhua xyoo tso nyiaj uas daim ntawv hauv glacial pas dej.
Ib tug kuj yuav nug, dab tsi landforms yog tsim los ntawm glacial deposition? Tom qab ntawd, thaum cov glaciers rov qab tawm hauv qab lawv cov khoom thauj ntawm cov pob zeb thiab cov xuab zeb (glacial drift), lawv tau tsim cov yam ntxwv ntawm cov av. Piv txwv xws li glacial moraines , cov eskers , thiab kam. Drumlins thiab ribbed moraines tseem yog landforms tshuav tom qab los ntawm retreating glaciers.
Tsuas yog li ntawd, yuav ua li cas glaciers ua rau deposition?
Deposition los ntawm Dej khov . Dej khov tso lawv cov sediment thaum lawv yaj. Lawv poob thiab tso tseg txhua yam uas tau khov ib zaug hauv lawv cov dej khov. Nws feem ntau yog sib xyaw ntawm cov khoom thiab pob zeb ntawm txhua qhov ntau thiab tsawg, hu ua glacial mus txog.
Ob hom glacial deposition yog dab tsi?
Glacial deposits yog ob hom sib txawv:
- Glacial mus txog: cov khoom ncaj qha tso los ntawm cov dej khov nab kuab. Txog thaum muaj kev sib xyaw ntawm cov khoom tsis sib xws xws li av nplaum loj mus rau pob zeb, ib txwm muaj pes tsawg leeg ntawm moraine.
- Fluvial thiab outwash sediments: sediments deposited los ntawm dej.
Pom zoo:
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