Dinosaurs ni imwe mu nyamaswa z’inyamabere za mbere ku isi, zigaragara mu gihe cya Triassic mu myaka miriyoni 230 ishize kandi zikaba zarazimye mu gihe cya Cretaceous mu myaka miriyoni 66 ishize. Igihe cya dinosaur kizwi ku izina rya “Mesozoic Era” kandi kigabanyijemo ibihe bitatu: Triassic, Jurassic, na Cretaceous.
Igihe cya Triassic (hashize imyaka miriyoni 230-201)
Igihe cya Triassic nigihe cyambere kandi kigufi cyigihe cya dinosaur, kimara hafi miliyoni 29. Ikirere ku isi muri iki gihe cyari cyumye, inyanja yari hasi, kandi ubutaka bwari buto. Mu ntangiriro yigihe cya Triassic, dinosaurs yari ibikururuka gusa, bisa ningona zo muri iki gihe. Nyuma yigihe, dinosaur zimwe na zimwe zagiye ziba nini, nka Coelophysis na Dilophosaurus.
Igihe cya Jurassic (miriyoni 201-145 ishize)
Igihe cya Jurassic nigihe cya kabiri cyigihe cya dinosaur nimwe mubihe bizwi cyane. Muri icyo gihe, ikirere cy’isi cyarushijeho gushyuha no kuba ubushuhe, ubutaka bwiyongera, n’inyanja irazamuka. Hariho ubwoko bwinshi bwa dinosaur bwabayeho muriki gihe, harimo amoko azwi nka Velociraptor, Brachiosaurus, na Stegosaurus.
Igihe cya Cretaceous (hashize imyaka miriyoni 145-66)
Igihe cya Cretaceous nigihe cyanyuma kandi kirekire cyigihe cya dinosaur, kimara imyaka miriyoni 80. Muri icyo gihe, ikirere cy’isi cyakomeje gushyuha, uduce twagutse cyane, kandi inyamaswa nini zo mu nyanja zagaragaye mu nyanja. Dinosaurs muri iki gihe nayo yari itandukanye cyane, harimo amoko azwi nka Tyrannosaurus Rex, Triceratops, na Ankylosaurus.
Igihe cya dinosaur kigabanyijemo ibihe bitatu: Triassic, Jurassic, na Cretaceous. Buri gihe kigira ibidukikije byihariye hamwe na dinosaurs zihagarariye. Igihe cya Triassic cyari intangiriro yubwihindurize bwa dinosaur, dinosaurs igenda ikomera buhoro buhoro; igihe cya Jurassic cyari impinga yigihe cya dinosaur, hagaragara amoko menshi azwi; kandi ibihe bya Cretaceous byari impera yigihe cya dinosaur kandi nigihe cyinshi cyane. Kubaho no kuzimangana kw'izi dinosaurs bitanga umurongo w'ingenzi wo kwiga ubwihindurize bw'ubuzima n'amateka y'isi.
Kawah Dinosaur Urubuga rwemewe:www.kawahdinosaur.com
Igihe cyo kohereza: Gicurasi-05-2023