Dinosauri ni imwe mu nyamaswa zo mu bwoko bwa vertebrate za mbere ku Isi, zagaragaye mu gihe cya Triassic mu myaka miliyoni 230 ishize kandi zagiye zicika burundu mu gihe cya Late Cretaceous mu myaka miliyoni 66 ishize. Igihe cya dinosauri kizwi nka "Mesozoic Era" kandi kigabanyijemo ibihe bitatu: Triassic, Jurassic, na Cretaceous.
Igihe cy'Ubutatu (imyaka miliyoni 230-201 ishize)
Igihe cya Triassic ni cyo gihe cya mbere kandi kigufi cyane mu gihe cya dinosaur, cyamaze imyaka igera kuri miliyoni 29. Ikirere ku Isi muri icyo gihe cyari cyumye, inyanja zari nke, kandi ubutaka bwari buto. Mu ntangiriro z'igihe cya Triassic, dinosaur zari inyamaswa zisanzwe zikururuka, nk'ingona n'imiserebanya byo muri iki gihe. Uko igihe cyagiye gihita, zimwe muri dinosaur zagiye zirushaho kuba nini, nka Coelophysis na Dilophosaurus.
Igihe cya Jurassic (imyaka miliyoni 201-145 ishize)
Igihe cya Jurassic ni igihe cya kabiri cy'igihe cya dinosaure kandi kikaba kimwe mu bizwi cyane. Muri icyo gihe, ikirere cy'Isi cyabaye ubushyuhe n'ubukonje, ubutaka bwariyongereye, kandi amazi y'inyanja yariyongereye. Hari amoko menshi atandukanye ya dinosaure yabayeho muri icyo gihe, harimo amoko azwi cyane nka Velociraptor, Brachiosaurus, na Stegosaurus.
Igihe cya Cretaceous (imyaka miliyoni 145-66 ishize)
Igihe cya Cretaceous ni cyo gihe cya nyuma kandi kirekire cyane mu gihe cya dinosaur, cyamaze imyaka igera kuri miliyoni 80. Muri iki gihe, ikirere cy'Isi cyakomeje gushyuha, ubutaka bwarushijeho kwaguka, ndetse n'inyamaswa nini zo mu mazi zagaragaye mu nyanja. Dinosaurs muri iki gihe nazo zari zitandukanye cyane, harimo amoko azwi nka Tyrannosaurus Rex, Triceratops, na Ankylosaurus.
Igihe cya dinosaure kigabanyijemo ibihe bitatu: Triassic, Jurassic, na Cretaceous. Buri gihe gifite ibidukikije byihariye n'ibiranga dinosaure. Igihe cya Triassic cyari intangiriro y'ubwihindurize bwa dinosaure, aho dinosaure zagendaga zikomera buhoro buhoro; igihe cya Jurassic cyari impera y'igihe cya dinosaure, hamwe n'amoko menshi azwi cyane yagaragaye; naho igihe cya Cretaceous cyari iherezo ry'igihe cya dinosaure ndetse n'igihe cy'ubwoko butandukanye cyane. Kubaho no kurimbuka kw'izi dinosaure bitanga icyerekezo cy'ingenzi cyo kwiga ubwihindurize bw'ubuzima n'amateka y'Isi.
Kawah Dinosaur Urubuga rwemewe:www.kawahdinosaur.com
Igihe cyo kohereza: Gicurasi-05-2023