The age of dinosaurs is called the Mesozoic. It spanned from 248 million years ago until 65 million years ago.
The Triassic Age was from 248 years ago until 206 million years ago. It began and ended with a natural disaster that wiped out 90% of the species.
The Jurassic Age was from 206 years ago until 146 million years ago. The supercontinent Pangea was breaking up rapidly.
The Cretaceous Age was from 146 million years ago until 65 million years ago. The climate was hot and humid allowing the existence of huge dinosaurs like T-Rex, Mammals, birds and crocodiles. Another natural disaster ended the Age.
The movie “Jurassic Park” should have been called “Cretaceous Park”.