Thaum kawg ntawm Cretaceous Lub Sijhawm, 65 lab xyoo dhau los, lub asteroid tsoo lub ntiaj teb nyob rau hauv Yucatan Peninsula, Mexico, tsim dab tsi niaj hnub no hu ua Chicxulub cuam tshuam crater . … Txawm nws ua li cas los xij, qhov kev ploj tuag no yog qhov kawg ntawm Cretaceous Lub Sijhawm thiab ntawm Mesozoic Era Mesozoic Era Lub Mesozoic tau muab faib ua peb lub sijhawm: lub Triassic (245-208 lab xyoo dhau los), Jurassic (208-146 lab xyoo dhau los), thiab Cretaceous (146-65 lab xyoo dhau los). https://ucmp.berkeley.edu › mesozoic › mesozoic
Introduction to the Mesozoic Era - (UCMP), Berkeley
Dinosaurs ua rau ploj tuag?
Ib lub meteorite loj poob rau hauv lub ntiaj teb, hloov pauv huab cua zoo heev uas cov dinosaurs tsis tuaj yeem muaj sia nyob. Tshauv thiab cov pa tawm los ntawm lub roob hluav taws ua rau muaj ntau yam ntawm cov dinosaurs. Cov kab mob wiped tawm tag nrho cov pejxeem ntawm dinosaurs. Khoom noj khoom haus tsis sib npaug ua rau kev tshaib plab ntawm cov dinosaurs.
Dab tsi tuaj tom qab lub sijhawm Cretaceous?
Lub Cretaceous pib 145.0 lab xyoo dhau los thiab xaus 66 lab xyoo dhau los; nws ua raws li Jurassic Lub Sijhawm thiab tau ua tiav los ntawm Lub Sijhawm Paleogene(thawj zaug ntawm ob lub sijhawm uas Lub Sijhawm Tertiary tau muab faib).
leej niam ntawm tag nrho cov extinctions yog dab tsi?
Kev ploj tuag PT loj heev nws feem ntau hu ua "Kev tuag loj"lossis "Niam ntawmTag nrho Extinctions" thiab tshwm sim nyob ib ncig ntawm 250 lab xyoo dhau los. Nws tau kwv yees hais tias nyob ib ncig ntawm 95% ntawm marine hom thiab 70% ntawm av hom tau ploj mus thiab yog tib lub npe hu ua loj tua kab.
Puas yog nws daus hauv lub sijhawm Jurassic?
Txoj kev txias ntawm lub sijhawm kawg ntawm Jurassic txuas ntxiv mus rau thawj hnub nyoog ntawm Cretaceous. Muaj pov thawj tias daus ntos tau tshwm sim nyob rau hauv qhov siab dua, thiab cov tropics tau ntub dua thaum lub sijhawm Triassic thiab Jurassic.
