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The Triassic preceded the Jurassic.

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15y ago

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What period came first Jurassic cretaceous or triassic?

jurassic The Triassic was the earliest period of the Mesozoic, followed by the Jurassic then the Cretaceous. The Cretaceous was of the greatest duration.


When did the turasic period end?

The Triassic Period ended 201.3 million years ago. It was the period in which the first dinosaurs evolved. The Triassic was followed by the Jurassic period.


What period were dinosaurs from?

None-avian dinosaurs first appeared in the Triassic period and were the dominant land vertebrates through the Jurassic and Cretaceous periods. At the end of the Cretaceous period, 65.5 million years ago, all non-avian dinosaurs went extinct. Birds, which are now classified as dinosaurs, continue to live to his day.


What period did the first birds arrive?

Dinosaurs first apeared in the triassic period


In what geologic time period did the Triassic Jurrassic and Cretaceous occur?

That is easy, the first is precambrian time, next you get the paleozoic era, which has Cambrian, ordovician, silurian, denovonian, carbonferious periods, Next you get the mesozoic era which contains the next three, which are triassic, jurrasic, and cretacous periods. Lasty you get the Cenozoic era which contains the last two which are the tertiary, and the quaternary!


What does jurassic mean?

"Jurassic" refers to a geologic period that occurred approximately 201 to 145 million years ago, known for the dominance of dinosaurs and the emergence of early mammals and birds. The term is derived from the Jura Mountains in Switzerland where rocks from this period were first extensively studied and identified.


How many years did the triassic last for?

The Triassic period lasted for approximately 51 million years, beginning around 252 million years ago and ending about 201 million years ago. It is the first period of the Mesozoic Era, following the Permian period and preceding the Jurassic period. The Triassic is characterized by the emergence of dinosaurs and the diversification of various life forms after the Permian-Triassic extinction event.


What was the period 65 million years ago?

The cretaceous period!!! First it was the Triassic period about 200-250 million yrs ago then it was the Jurassic Period and then about 135 million yrs ago the cretaceous period started and then it ended about 65 million yrs ago. This was the period when the t-rex was alive along with ankylosaurus, velociraptor, triceratops and iguanodon. Hope this helpsss!!! from Megggannn


Are birds and mammals decended from a common ancestor?

Mammals came before birds. The first mammals lived in the Triassic and the first birds lived in the Jurassic.


What is The Oldest Period in the Mesozoic Era?

The oldest period in the Mesozoic Era is the Triassic period, lasting from about 251 to 201 million years ago. It followed the Permian mass extinction and saw the early diversification of dinosaurs, as well as the first appearance of mammals and birds.


What Era did dinosaurs live in?

The dinosaurs lived in the Mesozoic Era, which includes the Triassic, Jurassic, and Cretaceous periods. The first dinosaurs appeared in the late Triassic and went extinct at the end of the Cretaceous.


How did the triassic-jurassic extinction event create diversification in dinosaurs?

The Triassic-Jurassic extinction event wiped out many existing species, allowing dinosaurs to fill the ecological niches left vacant. This sudden increase in available resources and habitats may have fostered the diversification of dinosaurs as they adapted to exploit new opportunities. The event likely acted as a catalyst for evolutionary innovation and rapid speciation within the dinosaur group.