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.
Cov xwm txheej tseem ceeb twg ua rau Proterozoic Eon?
Thaum lub sijhawm Proterozoic Eon, nplua nuj phaj tectonics tau ua haujlwm, thiab cov cores qub ntawm cov teb chaws tau tsiv mus thoob plaws ntiaj teb, sib sau me me ntawm cov pob zeb thiab qee zaum sib tsoo nrog lwm thaj av loj. Qhov kev tawm tsam kuj tshwm sim, ua rau muaj kev sib cav sib ceg.
Qhov kev hloov loj twg ua rau qhov kawg ntawm Proterozoic eon?
Ib leeg-celled algae hu ua acritarchs thiab cov tsiaj Ediacaran ploj mus los ntawm cov ntaub ntawv pob txha ntawmkawg ntawm Vendian, lub sijhawm kaw Proterozoic era.
Lub sijhawm Proterozoic eon kav ntev npaum li cas?
Cov Proterozoic Eon txuas ntxiv los ntawm 2.5 billion rau 541 lab xyoo dhau los thiab feem ntau muab faib ua Paleoproterozoic (2.5 billion txog 1.6 billion xyoo dhau los), Mesoproterozoic (1.6 billion rau 1 billion xyoo dhau los), thiab Neoproterozoic (1 billion rau 541 lab xyoo dhau los) eras.
Txhua lub sijhawm ntev npaum li cas?
Peb lub sijhawm raug lees paub: Phanerozoic Eon (tam sim no rov qab mus rau qhov pib ntawm Cambrian Lub Sijhawm), Proterozoic Eon, thiab Archean Eon. Tsawg tshaj plaws, eon feem ntau hais txog qhov ntev ntawm ib txhiab xyoo.
