Missoula Flood ice dam nyob qhov twg?

Video: Missoula Flood ice dam nyob qhov twg?

2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36

Nws yog thaum lub sij hawm no glacial ua ntej uas ib tug ntiv tes los ntawm glacial dej khov daim ntawv tau tsiv mus rau sab qab teb dhau los ntawm Purcell Trench nyob rau sab qaum teb Idaho, ze rau hnub no Lake Pend Oreille, ua rau tus dej Clark Fork tsim Glacial Lake Missoula.

Tsis tas li ntawd, dej nyab Missoula nyob qhov twg?

Cov Missoula dej nyab (tseem hu ua Spokane dej nyab los yog Bretz dej nyab los yog Bretz's dej nyab ) xa mus rau cataclysmic dej nyab uas tau cheb ib ntus thoob plaws sab hnub tuaj Washington thiab nqes hauv Columbia River Gorge thaum kawg ntawm lub hnub nyoog dej khov kawg. Lub glacial dej nyab Cov xwm txheej tau tshawb fawb txij li xyoo 1920s.

Ib tug kuj nug, qhov twg Ice Age Floods tshwm sim? Cov Ice Age Floods Zaj Dab Neeg - Luv luv Thaum lub pas dej tauv tawg, muaj dej loj loj thiab yog ice tso tawm thiab cheb hla ib feem ntawm Idaho, Washington, thiab Oregon ntawm nws txoj kev mus rau dej hiav txwv. Qhov siab tshaj plaws ntawm ntws yog kaum npaug ntawm kev sib xyaw ua ke ntawm tag nrho cov dej hauv ntiaj teb.

Tsis tas li ntawd, Lake Missoula Dej nyab muaj pes tsawg zaus?

Nws yog cov dej khov loj tshaj plaws-dammed pas dej paub rau muaj tshwm sim. Lub sij hawm rupturing ntawm lub pas dej khov ua rau lub Missoula Dej nyab - cataclysmic dej nyab uas tau hla sab hnub tuaj Washington thiab nqes Columbia River Gorge kwv yees li 40 sij hawm thaum lub sijhawm 2,000 xyoo.

Leej twg nrhiav tau Missoula Floods?

J Harlen Bretz

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