The climate before the Mesozoic period/era was a relatively warm climate. The Mesozoic Era was an interval of geological time from about 252 to 66 million years ago and is also called the Age of Reptiles.
it is cooler {apex}
During the Mesozoic Era, most mammals were small, nocturnal, and likely insectivorous. They were overshadowed by larger reptiles like dinosaurs and did not become the dominant group of animals until after the extinction of the dinosaurs at the end of the Mesozoic.
End of the Mesozoic era
There were major asteroid impacts.
No major plant groups died out at the end of the Mesozoic. However, most of the individual plants died because dust that was launched into the atmosphere by the asteroid impact blocked out the sun. However, once the dust settled after a few months. dormant seeds took hold.
it is cooler {apex}
it is cooler {apex}
it is cooler {apex}
it is cooler {apex}
The climate of the Cenozoic era was generally cooler and more variable compared to the relatively warm and stable climate of the Mesozoic era. The Cenozoic era experienced significant fluctuations in temperature, including periods of glaciation, whereas the Mesozoic era was characterized by a more uniform greenhouse climate.
The climate of the Cretaceous was apparently fairly mild and uniform, but it is possible that toward the end of the period some variant zones of climate had appeared, making the overall climate cooler. Such changes, along with changes in both the earth's surface and its flora and fauna, brought the Mesozoic to a close.
During the Mesozoic Era, most mammals were small, nocturnal, and likely insectivorous. They were overshadowed by larger reptiles like dinosaurs and did not become the dominant group of animals until after the extinction of the dinosaurs at the end of the Mesozoic.
Mass extinction
End of the Mesozoic era
The first dinosaurs evolved in the Mesozoic. At the end of the Mesozoic, all non avian dinosaurs became extinct. Therefor, all non avian dinosaurs, and some avian dinosaurs (birds), lived in the Mesozoic.
There were major asteroid impacts.
Mesozoic era