Lub Aleutian kob arc, tom qab ntawd, tsim nyob rau hauv the Early Eocene (55–50 Ma) thaum lub subduction ntawm Pacific Phaj nyob rau hauv North American Phaj pib. Lub arc yog ua los ntawm cov blocks cais uas tau tig mus rau clockwise.
Aleutian Islands hnub nyoog pes tsawg?
Keeb Kwm Keeb Kwm. Cov neeg paub txog kev ua haujlwm ntxov tshaj plaws ntawm thaj av Aleutian Islands hnub tim kwv yees 9,000 xyoo dhau los. Vim hais tias cov chaw qub txeeg qub teg ntawm lub hnub nyoog no tau pom tsuas yog nyob rau sab hnub tuaj Aleutians, nws yog qhov tseeb tias thawj qhov kev txav mus rau hauv cov kob saw tau tshwm sim los ntawm Alaska Peninsula sab hnub poob.
Aleutian Islands tau tsim li cas?
Nyob rau sab hnub poob Alaska, ob daim phiaj sib ntsib saum taub hau, thiab lub phaj Pacific nyob rau hauv qab ntawm North American phaj. Hauv cheeb tsam subduction no, qee qhov dej hiav txwv phaj melts thiab cov pob zeb molten thawb mus rau saum npoo hauv ib txoj hlua ntawm 40 lub roob hluav taws kub, ua rau Aleutian Islands.
Puas yog cov Aleutian Islands nyob?
Aleut cov tsev neeg tau nyob hauv thaj tsam txij li Hnub Nyoog Dej Thib Ob. Niaj hnub no nws yog lub tsev rau cov zej zog ntawm Akutan, Cold Bay, False Pass, King Cove thiab Sand Point. Cov zej zog no sib koom cov cuab yeej cuab tam thiab kev cia siab ntawm North Pacific Dej hiav txwv thiab Bering Hiav Txwv, tab sis txhua tus tuav nws tus kheej ntxim nyiam.
Leej twg nyob ntawm Aleutian Islands?
10,000 BC: Unangan (Aleut) txiav txim rau AleutianCov Islands tuajUnangan (Aleut) cov neeg nyob hauv cov kob saw txuas sab qab teb thiab sab hnub poob los ntawm Alaskan Peninsula.
