North America yuav luag rifted los ntawm qhov tam sim no nws midsection txog 1.1 billion xyoo dhau los. Cov pob zeb uas tsim nyob rau lub sijhawm no yog pom zoo tshaj plaws nyob ib puag ncig Lake Superior. Qhov kev rifting no tau raug tso tseg los ntawm kev tawm tsam ntawm kev sib tsoo sab av loj ntawm qhov tam sim no tus ntug dej hiav txwv sab hnub tuaj.
Dab tsi yog qhov kawg ntawm Proterozoic eon?
Qhov kawg ntawm Proterozoic coincides nrog pib ntawm Cambrian eon. … Txawm hais tias kev tshawb fawb tshiab thiab cov pob txha nrhiav pom tuaj yeem hloov pauv thaum thawj cov tsiaj fossils tuaj rau hauv lub neej, qhov kawg ntawm Proterozoic tam sim no tau teem rau 542 lab xyoo dhau los.
Yuav ua li cas nyob hauv Proterozoic Eon?
Lub Proterozoic Eon, lub ntsiab lus "thaum ntxov," yog lub eon ntawm lub sijhawm tom qab Archean eon thiab muaj txij li 2.5 billion xyoo mus rau 541 lab xyoo. Lub sijhawm no, feem ntau ntawm qhov nruab nrab ntawm cov teb chaws tau tsim thiab cov txheej txheem phaj tectonic tau pib.
Vim li cas eon tom qab Proterozoic eon hu ua Phanerozoic eon?
Lub Phanerozoic Eon yog lub geological eon tam sim nonyob rau hauv lub sij hawm geological scale, thiab ib tug thaum lub sij hawm uas muaj ntau yam tsiaj thiab nroj tsuag muaj sia. Nws npog 541 lab xyoo rau tam sim no, thiab nws pib nrog lub sijhawm Cambrian thaum tsiaj thawj zaug tsim cov plhaub tawv tawv khaws cia hauv cov ntaub ntawv fossil.
Lub Eon twg kav ntev tshaj?
Tus Proterozoic Eon yogKev faib tawm tam sim no ntawm Precambrian. Nws tseem yog qhov ntev tshaj plaws geological eon, pib 2.5 billion xyoo dhau los thiab xaus 541 lab xyoo dhau los.
